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Engine and peripherals

DIESEL INJECTION

PETROL INJECTION

BG0A - BG0B - BG0D - BG0G - KG0A - KG0B - KG0D - KG04

77 11 297 522

"The repair methods given by the manufacturer in this document are based on the technical specifications current when it was prepared.The methods may be modified as a result of changes introduced by the manufacturer in the production of the various component units and accessories from which his vehicles are constructed."

NOVEMBER 2000

All copyrights reserved by Renault.

EDITION ANGLAISE

Copying or translating, in part or in full, of this document or use of the service part reference numbering system is forbidden without the prior written authority of Renault.

© RENAULT 2000

Engine andPeripherals

Contents

Page

13

17

DIESEL INJECTION

Preamble 13-1Fault Interpretation 13-2Checking conformity 13-67Interpretation of commands 13-75Interpretation of parameters 13-85Customer complaints 13-90Fault-finding chart 13-91Help 13-97Glossaries 13-98

PETROL INJECTION

Sagem 2000 Injectionprogramme No. A3 Vdiag No. 08Preamble 17-1Fault interpretation 17-3Checking conformity 17-77Interpretation of states 17-86Interpretation of parameters 17-97Interpretation of commands 17-105Help 17-111Customer complaints 17-112Fault-finding chart 17-113

Motronic ME Injection 7.4.6Programme No. 12 Vdiag No. 04Preamble 17-119Fault interpretation 17-124Checking conformity 17-199Interpretation of commands 17-214Help 17-217Customer complaints 17-219Fault-finding chart 17-220

BOSCH DIRECT DIESEL INJECTION

"HIGH-PRESSURE COMMON AUTOMATIC WEAR

TAKE UP SYSTEM"

FAULT FINDING

CONTENTS

Pages

Preamble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01

Fault interpretation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 02

Checking conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Interpretation of commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Interpretation of parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Customer complaints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Fault-finding chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Glossaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

BOSCH DIESEL INJECTIONFault finding - Introduction 13

EDC15C3CPROGRAMME No: 86

VDIAG No: 0C(F9Q 750 and 754)

113BOSCH DIESEL INJECTIONFault finding - Introduction

DIAGNOSTIC PROCEDURE:

– Use of one of the diagnostic tools for identifying the system fitted on the vehicle (reading of the electronic control unit type, programme number, Vdiag number etc.).

– Finding the "Fault finding" documents corresponding to the system identified.

– Applying the information supplied in the preliminary chapters.

– Reading of the faults in the ECU memory and using the "Fault interpretation" part of the documentation.

RAPPEL: Each fault is interpreted for a given type of storage (fault present, fault stored, fault present or stored). The checks defined for processing of each fault are therefore only to be applied on the vehicle if the fault declared by the diagnostic tool is interpreted for the actual type of storage in question. The type should be considered when implementing the diagnostic tool after the ignition has been turned off then back on.

If a fault is interpreted when it is declared "stored", the diagnostic application conditions are shown in the "CONSIGNE" box. When the conditions are not satisfied, use the diagnostic to check the circuits associated with the faulty part, since the fault is no longer present on the vehicle. Use the same approach when a fault is declared as "stored" by the diagnostic tools but is only interpreted in the documentation for "fault present".

Perform the conformity checks (identifying any anomalies not yet declared by the system self-test), and apply the associated diagnostic depending on the results.

– Validation of the repair (disappearance of the phenomenon reported by customer).

– Use the diagnostic tool in the "customer complaint" mode if the problem persists.

TOOLING REQUIRED:

For commonicating with the injection ECU: NXR and CLIP (and optima).

For miscellaneous electrical checks:

Optima 5800 with optional garage multimeter and temperature sensor.

Breakout connector Elec. 1613 (necessary to avoid damaging the injection-ECU connector lugs).

Breakout connector Elec. 1603 (necessary to avoid damaging the Comfort ECU connector lugs).

IMPORTANT:Any diagnostic requiring working on the high-pressure DIRECT INJECTION system necessitates a full understanding of the cleanness and safety instructions defined in the Repair Manual, chapter 13.

This document introduces the generic diagnostic procedure applicable on all electronic control units P/N 8200083735

EDC15C3C, prog. No. 86, Vdiag N˚ OC.

To perform diagnostic on this system, it is essential to have the following parts:

– The repair manual for the vehicle in question,

– the wiring diagram for the vehicle concerned,

– The tools defined under the heading "essential special tooling".

EDC1586VOC1.0

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BOSCH DIESEL INJECTIONDiagnostics - Fault Interpretation 13


VDIAG No: 0C(F9Q 750 and 754) Diagnostics - Fault Interpretation

DF 001PRESENT

OR STORED

ComputerDEF : Fault stored. 1.DEF : Change the ECU.

DEF / 1.DEF NOTES None.

If the fault is stored, clear the fault from the computer memory.Switch off the ignition, then switch it on again to initialise the computer.If the fault reappears, replace the engine management computer.If necessary, modify the configuration of the new computer to match the equipment options fitted on the vehicle.

If the fault is present, replace the engine management computer.If necessary, modify the configuration of the new computer to match the equipment options fitted on the vehicle.

AFTER REPAIRErase the fault memory. Switch off the ignition and carry out a road test followed by a test using the diagnostic tool. Deal with any other faults as necessary.

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13-3



DF 002PRESENT

OR STORED

Coolant-temperature sensor circuit.CC.0 : Short circuit to earth.CO.1 : Open circuit or short circuit on +12-volt line.1.DEF : Coolant operating temperature not attained.

NOTES

Conditions for applying diagnostic on stored faults:If the fault is declared present following:removal of the fault and a time delay of 1 minute, engine running.

Special notes:Use the Elec. 1613 Breakout connector for any work on the ECU connector.Use a "workshop" temperature sensor to compare the temperatures.

CC.0 NOTES None.

Check the computer connections. Repair if necessary. Check the coolant temperature sensor connections. Repair if necessary.

Measure the resistance of the coolant-temperature sensor between terminals 2 and 3 of the connector. If the resistance is not in the region of 2.2 Kohms ± 0.1 at +25°C, replace the sensor.

Ensure isolation in relation to ground of the connection between: engine ECU, connector B channel K3 channel 3 coolant-temperature-sensor connector

Ensure the continuity of the connection between: engine ECU, connector B channel E1 channel 2 coolant-temperature-sensor connector

If the fault persists, change the ECU.If necessary, modify the configuration of the new ECU in relation to the options fitted on the vehicle.

OC.1 NOTES None.

Check the computer connections. Repair if necessary.Check the coolant temperature sensor connections. Repair if necessary.

Measure the resistance of the coolant-temperature sensor between terminals 2 and 3 of the connector. If the resistance is not in the region of 2.2 Kohms ± 0.1 at +25°C, replace the sensor

Ensure continuity and isolation in relation to the +12-volt line of the connections between:engine ECU, connector B channel E1 channel 2 coolant-temperature-sensor connector,engine ECU, connector B channel K3 channel 3 coolant-temperature-sensor connector.

If the fault persists, change the ECU.If necessary, modify the configuration of the new ECU in relation to the options fitted on the vehicle.


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DF 002

(continued)

1.DEF NOTES

Conditions for applying diagnostic on stored faults:The fault is declared present following a time delay of 8 minutes engine running.

Special notes:Use a "workshop" temperature sensor to compare the values.

Check the connectors on the engine ECU. Repair if necessary.Check the coolant temperature sensor connections. Repair if necessary.

Compare the engine temperatures indicated on the instrument panel and by the diagnostic-tool screen "parameter" in relation to those indicated by the "workshop" temperature sensor.

–In the event of a wide difference, change the engine temperature sensor.Measure the resistance of the coolant-temperature sensor between terminals 2 and 3 of the connector. If the resistance is not in the region of 2.2 Kohms ± 0.1 at +25°C, replace the sensor.

Ensure the continuity and isolation in relation to ground of the following connections: (connectors demated) engine ECU, connector B channel K3 channel 3 coolant-temperature-sensor connector.

Ensure continuity and isolation in relation to the +12-volt line of the connection between: (connectors demated) engine ECU, connector B channel E1 channel 2 coolant-temperature-sensor connector,

Measure the line resistance of the following connections: – channel E1, connector B ECU channel 2 coolant-temperature-sensor connector,– channel K3, connector B ECU channel 3 coolant-temperature-sensor connector.Carry out the necessary operations if the resistance is abnormally high.

fuel temperature sensorWith the engine cold, check the state of the thermostatic cell.Check for filling and leaktightness of cooling circuit. Perform any necessary repairs.


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DF 012PRESENT

OR STORED

Battery voltage1.DEF : Battery voltage too low. 2.DEF : Battery voltage too high.

NOTES

Conditions for applying diagnostic on stored faults:If the fault is declared present following starting and a time delay of 30 seconds engine running.Special points: if necessary, carry out a complete check of the circuit, using the Optima Station 5800, on the basis of the Technical Note "diagnostic of the charge circuit"

1.DEF NOTES None.

Carry out the operations necessary to obtain the correct computer power supply:9 volts < tension de operation < 14.5 volts.

– Check the condition of the engine fuse, (oxydation, poor contact at lugs etc.),– Check the battery charge,– Check the charge circuit,– Check battery terminals for tightening and correct condition,– Check for presence of engine-ECU supply on connector A, channels M2 and M3,– Check the earth connections of the engine ECU on connector A, channels L3, L4, M4.

Perform any necessary repairs.

2.DEF NOTES None.

Carry out the operations necessary to obtain the correct computer power supply:9 volts < operating voltage < 14.5 volts.

– Check the battery charge and– check the charge circuit,



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DF 015PRESENT

OR STORED

Immobiliser1.DEF : fault on the connection.2.DEF : fault in immobiliser code.

NOTES

Conditions for applying diagnostic on stored faults: Apply the diagnostic whether the fault is present or stored.

Special notes:Use the Elec. 1613 Breakout connector for any work on the ECU connector.

1.DEF NOTES None.

Run a diagnostic on the multiplexed network.

Ensure battery terminals are properly tightened.

2.DEF NOTES None.

If the fault is stored, clear the fault from the computer memory.Switch off the ignition, then switch it on again to initialise the computer.If the fault reappears, replace the engine management computer.If necessary, modify the configuration of the new computer to match the options fitted on the vehicle.

If the fault is present, replace the engine management computer.If necessary, modify the configuration of the new ECU to match the options fitted on the vehicle.


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DF 019PRESENT

OR STORED

Air flow sensor circuitCO.0 : Open circuit or short circuit to earth, engine running. CC.1 : Short circuit on the +12-volt line, engine running.1.DEF : Sensor supply problem.2.DEF : Data incoherence.

NOTES

Conditions for applying diagnostic on stored faults:If the fault reappears stored following:– a time delay of 5 minutes engine running at different idle speeds.


CO.0 NOTESIn the event of simultaneous presence of fault "DF022: AIR TEMPERATURE CO.1 sensor circuit", check that the flow meter is connected.

Check the connectors on the engine ECU. Repair if necessary.Check the air flow sensor connections. Repair if necessary.Ensure the continuity and earth-isolation of the connection between:

engine ECU, connector B, channel H4 channel 5 of the air-flow-sensor connector.Ensure presence of the +12-volt "relay downstream" voltage on channel 4 of the air-flow-sensor connector.

Ensure isolation as follows:– across channels 5 and 6 of the air-flow-sensor connector,– across channels 2 and 5 of the air-flow-sensor connector.

If the fault persists after these checks, replace the air flow sensor.


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DF 019

(continued)

CC.1 NOTES

Processing priority in event of stacked faults:In the event of simultaneous presence of fault "DF022: AIR TEMPERATURE CO.1 sensor circuit", check that the air-flow-sensor connector is mated.

Check the computer connections. Repair if necessary.Check the air flow sensor connections. Repair if necessary.

Ensure isolation in relation to the +12-volt line of the connection between:engine ECU, connector B channel H4 channel 5 air-flow-sensor connector.

Ensure the continuity of the following connections:– between channel L3, connector B of the ECU and channel 6 of the air-flow-sensor connector,– across channels L3, L4 and M4, connector B of the ECU,– between the battery earth and channel L3, connector B of the ECU,– between channel A3, connector C of the ECU and channel 2 of the air-flow-sensor connector.– across channels M2 and M3, connector B of the ECU and channel 4 of the air-flow-sensor connector.

If the fault persists after these checks, replace the air flow sensor.

1.DEF NOTESProcessing priority in event of stacked faults:In priority process fault "DF091: Sensor No.1 supply voltage" if it is present or stored.

Check the connectors on the engine ECU. Repair if necessary.Check the air flow sensor connections. Repair if necessary.Ensure continuity and isolation in relation to the +12-volt line of the connection between:

engine ECU, connector B channel G2 channel 3 air-flow-sensor connector.Check insulation between channels 3 and 4 of the air-flow-sensor connector.

Ensure the continuity and earth-isolation of the connection between:engine ECU, connector B channel G2 channel 3 air-flow-sensor connector.

Check the following insulations:– across channels 3 and 6 of the air-flow-sensor connector,– across channels 3 and 2 of the air-flow-sensor connector.

Ensure presence of the +12-volt "relay downstream" voltage on channel 4 of the air-flow-sensor connector.Ensure presence of earth on channels 2 and 6 of the air-flow-sensor connector.


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DF 019

(continued)

2.DEF NOTES

Conditions for applying diagnostics on stored faults:If the fault is declared present following starting and an idling-speed temperature rise exceeding 60°C followed by a time delay of 40 secondsorIf fault reappears stored following removal of the fault, engine starting, switching-off of the ignition, followed by end of "power-latch" and switching-on of the ignition.

Processing priority in event of stacked faults:In priority process fault "DF106: CO.0 Damper valve" if it is present or stored.If the "EGR valve 1.DEF" fault is present, proceed with the "interpret instructions" Diagnostics - "AC 007: EGR valve".

Check the connectors on the engine-control ECU. Repair if necessary.Check the air flow sensor connections. Repair if necessary.

Ensure continuity and isolation in relation to the +12-volt line and the earth of the connection between:engine ECU, connector B channel G2 channel 3 air-flow-sensor connector.

Ensure the continuity and earth-isolation of the connection between:engine ECU, connector B channel H4 channel 5 air-flow-sensor connector.

Ensure continuity and isolation in relation to the + 12-volt line of the connection between:engine ECU, connector C channel A3 channel 2 air-flow-sensor connector.

Ensure the continuity of the connection between the earth and channel 6 of the air-flow connector.

Ensure the leaktightness of the air inlet circuit. Repair if necessary.

With the engine running, switch off the ignition and check for operation of the damper valve. In the event of incorrect operation of this valve, proceed to fault finding - Interpretation of commands: "AC 593: Damper valve".

Ensure absence of foreign bodies on the flow meter grille.Ensure leaktightness of the air inlet circuit.Check the oil-vapour recycling circuit (excess oil).Carry out the required operations.


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13-10


VDIAG No: 0C(F9Q 750)

DF 021PRESENT

OR STORED

Fuel temperature sensor circuitCC.0 : Short circuit to earth.CO.1 : Open circuit or Short circuit on the +12-volt line.

NOTES

Conditions for applying diagnostics on stored faults:If the fault is declared present following:– a time delay of 2 minutes engine running.

Special notes:– Use the Elec. 1613 Breakout connector for any work on the ECU connector.– Operation not applicable for the F9Q 754 engine.

CC.0 NOTES None.

Check the fuel temperature sensor connections. Repair if necessary.Check the connectors on the engine ECU. Repair if necessary.

Ensure earth-isolation of the connection between:Engine ECU, connector B channels J3 channel 1 fuel-temperature-sensor connector.

Measure the resistance of the fuel temperature sensor across channels 1 and 2. Change the sensor if the resistance is outside tolerances 2050 Ohms ± 10 % à 25 ˚C.

If the fault persists after these checks, change the engine ECU.

OC.1 NOTES None.

Check the fuel temperature sensor connections. Repair if necessary.Check the computer connections. Repair if necessary.

Ensure continuity and isolation of the following connections in relation to the +12-volt line:Engine ECU, connector B channels J3 channel 1 fuel-temperature-sensor connector,Engine ECU, connector B channels G1 channel 2 fuel-temperature-sensor connector.

Measure the resistance of the fuel-temperature sensor across channels 1 and 2. Change the sensor if the resistance is outside tolerances 2050 Ohms ± 10 % à 25 ˚C.

If the fault persists after these checks, change the engine ECU.


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DF 022PRESENT

OR STORED

Air temperature sensor circuitCC.0 : Short circuit to earth.CO.1 : Open circuit or Short circuit on the +12-volt line.

NOTES

Conditions for applying diagnostics on stored faults:If the fault is declared present following:a time delay of 2 minutes engine running.


CC.0 NOTES None.

Check the air temperature sensor connections. Repair if necessary.Check the connectors on the engine ECU. Repair if necessary.

Ensure earth-isolation of the connection between:engine ECU, connector B channel D3 channel 1 air-temperature-sensor connector,

Measure the resistance of the air-temperature sensor across channels 1 and 2. Change the sensor (common to the flow meter) if the resistance is outside tolerances 2170 ohms ±10% à 20°C.

If the fault persists, change the engine ECU.

OC.1 NOTES

Processing priority in the event of stacked faults:In the event of simultaneous presence of fault "DF019: air flow meter 2.DEF", check that the flow-meter connector is properly mated.

Check the air temperature sensor connections. Repair if necessary.Check the computer connections. Repair if necessary.

Ensure continuity and isolation in relation to the +12-volt line of the following connections:– engine ECU, connector B channels D3 channel 1 air-temperature-sensor connector,– engine ECU, connector C channels A3 channel 2 air-temperature-sensor connector.

Measure the resistance of the air-temperature sensor across channels 1 and 2. Change the sensor (common to the flow meter) if the resistance is outside tolerances. 2170 ohms ±10% à 20°C.

If the fault persists, change the engine ECU.


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DF 040PRESENT

OR STORED

Supply after contact1.DEF : Fault on the connection

1.DEF NOTES None.

Check the condition of the engine fuse carriers F6; F3 (crimpingof wires to lugs, and condition of lugs on fuse side).Repair if necessary.

– Erase the fault from the ECU memory.– Switch off the ignition, then switch it on again to initialise the computer.– If the fault reappears, replace the engine management computer.

If necessary, modify the configuration of the new ECU in relation to the options fitted on the vehicle.


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DF 048PRESENT

OR STORED

Low speed engine cooling fan assembly circuitCC.1 : Short circuit on the +12-volt line.CO.0 : Open circuit or short circuit to earth.

NOTES

Conditions for applying diagnostics on stored faults:If the fault reappears stored following:

– Clearing of the fault memory and– Actuator test "AC011: FAN ASSEMBLY RELAY - LOW SPEED".


CC.1 NOTES None.

Check the connectors on the engine ECU. Repair if necessary.Check the connectors on the low-speed fan relay support.

Measure the resistance of the low-speed fan relay coil.Replace the relay if the resistance is not in the region of 60 Ohms ± 5 at +20°C.

Ensure isolation in relation to the +12-volt line of the connection between:Engine ECU, connector C channel A2 channel 11 of the low-speed fan relay support.

If the fault persists, proceed to fault finding -- "Interpretation of commands: AC 011".

CO.0 NOTES None.

Check the computer connections. Repair if necessary.Check the connectors on the low-speed fan relay support.

Measure the resistance of the low-speed fan relay coil.Replace the relay if the resistance is not in the region of 60 Ohms ± 5 at +20°C.

Ensure the continuity and earth-isolation of the connection between:Engine ECU, connector C channel A2 channel 11 low-speed fan relay support.

If the fault persists, proceed to fault finding - "Interpretation of commands: AC 011".


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DF 061PRESENT

OR STORED

Heater plug circuit 1.DEF : Heater plug(s) unserviceable or CIRCUIT OPEN

NOTES


– Clearing of the fault memory and– Actuator test "AC010: Preheating relay".


1.DEF NOTES None.

Check the pre-heating unit connections. Repair if necessary.Check the connectors on the engine-control ECU. Repair if necessary.Check the connections of all the heater plugs. Perform any necessary repairs.

Ensure the engine is earthed.

Check for resistance of the heater plugs: replace the plug if the resistance is not 0.6 ± 0.1 à +20°C.

Ensure the continuity of the following connections:– pre-postheating unit channel 1 heater plug on cylinder 3,– pre-postheating unit channel 2 heater plug on cylinder 4,– pre-postheating unit channel 6 heater plug on cylinder 1,– pre-postheating unit channel 7 heater plug on cylinder 2.

Ensure presence of the +12-volt line Bat (BP17) on channel 3 of the preheating relay.

Ensure continuity of the connection between:Engine ECU, connector B channel B3 channel 9 pre-postheating unit connector.

If the fault persists, change the pre-heating unit.


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DF 067PRESENT

OR STORED

Fuel pressure sensor circuitCC.0 : Short circuit to earth.CO.1 : Open circuit or Short circuit on the +12-volt line.1.DEF : Sensor supply problem.

NOTES

Conditions for applying diagnostics on stored faults:If the fault is declared present following:– a time delay of 5 minutes engine running at several different speeds.


CAUTION: No ohmmeter-checking is allowed on the pressure sensor (risk of destruction).

CC.0 NOTES None.

Check the connectors on the engine ECU. Repair if necessary.Check the fuel pressure sensor connections. Repair if necessary.

Ensure earth-isolation of the connection between:Engine ECU, connector B channel D1 channel 2 of the fuel-pressure-sensor connector.

Ensure continuity of the connection between:Engine ECU, connector B channel H2 channel 3 of the fuel-pressure-sensor connector.

OC.1 NOTESCAUTION: No ohmmeter-checking is allowed on the pressure sensor (risk of destruction).

Check the computer connections. Repair if necessary.Check the fuel pressure sensor connections. Repair if necessary.

Ensure continuity and isolation in relation to the +12-volt line of the connection between:Engine ECU, connector B channel D1 channel 2 of the fuel-pressure-sensor connector.

Ensure continuity of the connection between:Engine ECU, connector C channel B3 channel 1 of the fuel-pressure-sensor connector.


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DF 067

(continued)

1.DEF NOTESProcessing priority in the event of stacked faults:In priority process fault "DF091: Sensor No.1 supply voltage" (if sensor fitted).

Check the connectors on the engine ECU. Repair if necessary.Check the fuel pressure sensor connections. Repair if necessary.

Ensure presence of the fuel-pressure-sensor supply:+ 5 volts on channel 3 of the manifold-pressure-sensor connectorEarth on channel 1 of the manifold-pressure-sensor connector

Check the condition of the fuel pressure sensor. Replace if necessary.


EDC1586VOC1.0




DF 070PRESENT

OR STORED

Camshaft sensor / engine speed consistency1.DEF : Frequency of camshaft sensor signal too high.2.DEF : incoherence in engine speed.3.DEF : Plausibility of deceleration.4.DEF : incoherence in camshaft signal.

NOTES

Conditions for applying diagnostics on stored faults.The fault is declared present following: starter-motor action 10 secondsorThe fault is declared present following: a time delay of 1 minute engine running.


1.DEF NOTESProcessing priority in event of stacked faults: In priority process fault "DF012: Battery voltage" if present.

In priority process fault "DF012: battery voltage" if present. Ensure presence of the battery voltage across channels 1 and 3 of the sensor connector:

12 volts channel 3 earth channel 1

Repair if necessary. Ensure earthing of the engine block. Check the state of the sensor (temperature rise). Replace if necessary.

2.DEF NOTESProcessing priority in event of stacked faults:In priority process fault "DF012: battery voltage" if present.

Check the computer connections. Repair if necessary.Check the engine speed sensor connections. Repair if necessary.

Check the motor resistance speed sensor: Required values: 800 ohms ± 80 ohmsChange the sensor if the resistance is outside tolerances

Ensure the continuity of the following connections:engine ECU, connector B channel G3 channel A of the engine speed sensor.engine ECU, connector B channel H3 channel B of the engine speed sensor.

Check the condition of the sensor. Replace if necessary.


EDC1586VOC1.0

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13-18



DF 070

(continued)

3.DEF NOTES None.

Check the connectors on the engine ECU. Repair if necessary.Check the engine speed sensor connections. Repair if necessary.

Ensure correct earthing of the engine block.

Ensure the continuity of the following connections:Engine ECU, connector B channel G3 channel A of the engine speed sensor.Engine ECU, connector B channel H3 channel B of the engine speed sensor.

Check the motor resistance speed sensor. Required values: 800 ohms ± 80 ohms.Change the sensor if the resistance is outside tolerances

4.DEF NOTES None.

Check the computer connections. Repair if necessary.Check the camshaft sensor connections. Repair if necessary.

Ensure the continuity of the following connections:Engine ECU, connector C channel K4 channel 2 of the camshaft sensor,Engine ECU, connector C channel C1 channel 1 of the camshaft sensor.

Check the tension of the timing belt.Check the position of the camshaft sprocket on the camshaft (key).Check the valve timing.Perform any necessary repairs.


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DF 071PRESENT

Pedal sensor circuit track 1CO.0 : Open circuit or short circuit to earth.CC.1 : Short circuit on the +12-volt line.1.DEF : Sensor supply problem.

NOTESSpecial notes:Use the Elec. 1613 Breakout connector for any work on the ECU connector.

CO.0 NOTESIn the event of simultaneous presence of fault "DF073: PEDAL-SENSOR CIRCUIT TRACK2 CO.0", check that the pedal-sensor connector is fully mated.

Check the connectors on the engine ECU. Repair if necessary.Check the pedal sensor connections. Repair if necessary.

Ensure the continuity and earth-isolation of the connection between:Engine ECU, connector A channel C1 channel 3 pedal-sensor connector.

Also ensure this connection is isolated from the following connections:Engine ECU, connector A channel B3 channel 2 pedal-sensor connector,Engine ECU, connector A channel A3 channel 1 pedal-sensor connector.

Measure the resistance of pedal sensor track 1 between the following channels: 2 and 4 1,2 ± 0.48 Kohms à +20°C.

Change the sensor if the resistance is outside tolerances

CC.1 NOTES None.

Check the computer connections. Repair if necessary.Check the pedal sensor connections. Repair if necessary.

Ensure isolation in relation to the +12-volt line of the connection between:Engine ECU, connector A channel C1 channel 3 pedal-sensor connector.Ensure earth presence on channel 2 of the pedal-sensor connector.


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DF 071

(continued)

1.DEF NOTESProcessing priority in the event of stacked faults:In priority process fault "DF091: Sensor No.1 supply voltage" if present or stored.

Check the computer connections. Repair if necessary.Check the pedal sensor connections. Repair if necessary.

Ensure isolation in relation to ground and au +12 volts of the connection between:Engine ECU, connector A channel E1 channel 4 pedal-sensor connector.

Ensure insulation between the following connections:Engine ECU, connector A channel E1 channel 4 pedal-sensor connector,Engine ECU, connector A channel B3 channel 2 pedal-sensor connector,Engine ECU, connector A channel A3 channel 1 pedal-sensor connector,Engine ECU, connector A channel H2 channel 5 pedal-sensor connector.

Ensure continuity and isolation in relation to the +12-volt line of the connection between:Engine ECU, connector A channel B3 channel 2 pedal-sensor connector.

Also ensure insulation of this connection against the connection between:Engine ECU, connector A channel H2 channel 5 pedal-sensor connector.


EDC1586VOC1.0


13-21



DF 072PRESENT

OR STORED

Fuel pressure information1.DEF : Measured pressure too high.2.DEF : Measured pressure too low.3.DEF : COR of manifold pressure regulating solenoid valve too high.4.DEF : Solenoid valve jammed: fuel overpressure.5.DEF : Pressure drop in the manifold.

NOTES

Conditions for applying diagnostics on stored fault.The fault is declared present following a time delay of 2 minutes engine running at idling speed.

Special notes:See Repair Manual, particularly the instructions regarding cleanness requirements for working on the high-pressure direct-injection system.Use the Elec. 1613 Breakout connector for any work on the ECU connector.

CAUTION: No ohmmeter-checking is allowed on the pressure sensor (risk of destruction).

1.DEF4.DEF

NOTES None.

Check the connectors on the engine ECU. Repair if necessary.Check the fuel pressure sensor connections. Repair if necessary.Check the fuel pressure solenoid valve connections. Repair if necessary.

Measure the line resistance of the following connections:Engine ECU, connector B channel L1 channel 2 fuel-pressure solenoid valve connector.Engine ECU, connector B channel D1 channel 2 fuel-pressure-sensor connector.

In the event of abnormally high resistance, perform the required operations.

Perform an actuator test "AC 006: FUEL-PRESSURE SOLENOID VALVE". A slight whistling sound should be heard from the fuel pressure regulator.In the opposite case, ensure presence of the +12 volts "relay downstream" voltage on channel 1 of the fuel-pressure solenoid valve connector.If the problem persists, proceed to fault finding - Interpretation of commands "AC006".


EDC1586VOC1.0


13-22



DF 072

(continued)

2.DEF3.DEF5.DEF

NOTES None.

Check the connectors on the engine ECU. Repair if necessary.Check the fuel pressure sensor connections. Repair if necessary.Check the fuel pressure solenoid valve connections. Repair if necessary.

Measure the line resistance of the following connections:Engine ECU, connector B channel L1 channel 2 fuel-pressure solenoid valve connector.Engine ECU, connector B channel D1 channel 2 fuel-pressure-sensor connector.Carry out the necessary operations if the resistance is abnormally high.

If the problem persists:At idling speed, display parameter "PR083: MANIFOLD PRESSURE".If the value displayed is not 280 ± 30 bar:Run actuator test "AC 006: FUEL PRESSURE SOLENOID VALVE ".A slight whistling sound should be heard from the fuel pressure regulator.In the opposite case, ensure presence of the +12 volts "relay downstream" voltage on channel 1 of the fuel-pressure solenoid valve connector.If the problem persists, proceed to fault finding - Interpretation of commands "AC006".


EDC1586VOC1.0


13-23



DF 073PRESENT

OR STORED

Pedal sensor circuit track 2CO.0 : Open circuit or short circuit to earth.CC.1 : Short circuit on the +12-volt line.1.DEF : Sensor supply problem.2.DEF : Coherence between CHANNEL 1 and CHANNEL 2.

NOTES

Conditions for applying diagnostics on stored faults.The fault is declared present following a series of full load/no load actions on the accelerator pedal.


CO.0 NOTES

Processing priority in event of stacked faults:In the event of simultaneous presence of fault "DF071: PEDAL-SENSOR CIRCUIT TRACK1 CO.0" check that the pedal-sensor connector is fully mated.

Check the connectors on the engine ECU. Repair if necessary.Check the connectors on the pedal sensor. Repair if necessary.

Ensure continuity of the connection between:Engine ECU, connector A channel F1 channel 6 pedal-sensor connector.

Also ensure isolation of this connection in relation to ground and in relation to the following connections:Engine ECU, connector A channel B3 channel 2 pedal-sensor connector,Engine ECU, connector A channel A3 channel 1 pedal-sensor connector.

Measure the resistance of the pedal sensor - channel 2, between channels:1 and 5 1.7 ± 0.68 Kohms à +20°C.

Change the sensor if the resistance is outside tolerances

CC.1 NOTES None.


Ensure isolation in relation to the +12-volt line of the connection between:Engine ECU, connector A channel F1 channel 6 pedal-sensor connector.

Ensure earth presence on channel 1 of the pedal-sensor connector.

If the fault persists, change the pedal sensor.


EDC1586VOC1.0


13-24



DF 073

(continued)

1.DEF NOTESProcessing priority in event of stacked faults:In priority process fault "DF092: Sensor supply voltage No.2" if it is present or stored.


Ensure the continuity and isolation in relation to +12 volt lineof the connections between:Engine ECU, connector A channel H2 channel 5 pedal-sensor connector.Engine ECU, connector A channel E1 channel 4 pedal-sensor connector.Engine ECU, connector A channel A3 channel 1 pedal-sensor connector,Engine ECU, connector A channel B3 channel 2 pedal-sensor connector,

Ensure earth-isolation of the connections between:Engine ECU, connector A channel H2 channel 5 pedal-sensor connector.Engine ECU, connector A channel E1 channel 4 pedal-sensor connector.

If the fault persists, change the pedal sensor.

2.DEF NOTES None.


Measure the resistance of the pedal sensor - channel 1, across channels 2 and 4 of the pedal-sensor connector.Change the sensor if the resistance is not in the region of 1.2 ± 0.48 Kohms.Measure the resistance of the pedal sensor - channel 2, across channels 1 and 5 of the pedal-sensor connector.Change the sensor if the resistance is not in the region of 1.7 ± 0.68 Kohms.

Measure the conductor resistance of the following connections:Engine ECU, connector A channel F1 channel 6 pedal-sensor connector,Engine ECU, connector A channel C1 channel 3 pedal-sensor connector,Engine ECU, connector A channel H2 channel 5 pedal-sensor connector,Engine ECU, connector A channel B3 channel 2 pedal-sensor connector,Engine ECU, connector A channel A3 channel 1 pedal-sensor connector,Engine ECU, connector A channel E1 channel 4 pedal-sensor connector.

Carry out the necessary operations if the resistance is abnormally high.

If the fault persists, proceed to conformity-checking: accelerator-pedal sensor.


EDC1586VOC1.0


13-25



DF 074PRESENT

OR STORED

Turbocharging pressure sensorCO.0 : Open circuit or short circuit to earth.CC.1 : Short circuit on the +12-volt line.1.DEF : Sensor supply problem.2.DEF : Coherence between the turbocharging pressure and the atmospheric

pressure.

NOTES

Special notes:Processing of this fault does not apply for the Master vehicle type.Use the Elec. 1613 Breakout connector for any work on the ECU connector.

Conditions for applying diagnostics on stored faults:The fault is declared present following engine-start,orThe fault is declared present following a road test.

CO.0 NOTES None.

Check the connectors on the engine-control ECU. Repair if necessary.Check the turbocharging pressure sensor connections. Repair if necessary.

Ensure the continuity and earth-isolation of the connection between: Engine ECU, connector B channel C1 channel B turbocharging pressure-sensor connector.

Also ensure insulation of this connection against the connection between: Engine ECU, connector C channel A4 channel A turbocharging pressure-sensor connector.

Ensure continuity of the connection between: Engine ECU, connector B channel J2 channel C turbocharging pressure-sensor connector.

Measure the resistance of the turbocharging pressure-sensor between the following channels (sensor disconnected):

A and C 4 Kohms ± 0.5B and C 5 Kohms ± 0.5A and B 9 Kohms ± 0.5

Change the sensor if the values are outside tolerances

CC.1 NOTES None.

Check the connectors on the engine-control ECU. Repair if necessary.Check the turbocharging pressure sensor connections. Repair if necessary.

Ensure isolation in relation to the +12-volt line of the connection between: Engine ECU, connector B channel C1 channel B turbocharging pressure-sensor connector.

Ensure continuity of the connection between: Engine ECU, connector C channel A4 channel A turbocharging pressure-sensor connector.

Ensure earth presence on channel A of the turbocharging pressure-sensor connector.

If the fault persists, change the turbocharging pressure sensor.

AFTER REPAIR Erase the fault memory. Switch off the ignition and carry out a road test followed by a test using the diagnostic tool. Deal with any other faults as necessary.

EDC1586VOC1.0


13-26



DF 074

(continued)

1.DEF NOTESProcessing priority in event of stacked faults:In priority process fault "DF091: Sensor No.1 supply voltage" if it is present or stored.

Check the connectors on the engine ECU. Repair if necessary.Check the turbocharging pressure sensor connections. Repair if necessary.

Ensure continuity of the connection between: Engine ECU, connector B channel J2 channel C turbocharging pressure-sensor connector.Also ensure isolation of this connection in relation to earth and the +12-volt line and in relation to the following connections: Engine ECU, connector B channel C1 channel B turbocharging pressure-sensor connector, Engine ECU, connector C channel A4 channel A turbocharging pressure-sensor connector,

Ensure continuity of the connection between: Engine ECU, connector C channel A4 channel A turbocharging pressure-sensor connector.Also ensure isolation of this connection in relation to the +12-volt line and in relation to the connection between: Engine ECU, connector B channel C1 channel B turbocharging pressure-sensor connector.

If the fault persists, change the turbocharging pressure sensor.

2.DEF NOTESProcessing priority in event of stacked faults:In priority process fault "DF078" if it is present.

Check the computer connections. Repair if necessary.Check the turbocharging pressure sensor connections. Repair if necessary.

Measure the conductor resistance of the connection between: Engine ECU, connector B channel C1 channel B turbocharging pressure-sensor connector.Carry out the necessary operations if the resistance is abnormally high.

Measure the resistance of the turbocharging pressure sensor across channels A and C.Change the sensor if the resistance is not in the region of 4 ± 0.5 Kohms à +20°C.

If the fault persists, perform a road test and display "PR082". Proceed to conformity-checking, interpretation of parameters: "PR082"

If the fault persists display parameter "PR016: ATMOSPHERIC PRESSURE".If the value displayed is not in the region of 1000 hPa ± 40, proceed to conformity-checking, Interpretation of parameters "PR016".


EDC1586VOC1.0


13-27



DF 075PRESENT

OR STORED

Atmospheric pressure sensor

NOTESProcessing priority in event of stacked faults:In priority process fault "DF091: Sensor No.1 supply voltage" if it is present or stored.

If the fault is stored, erase the fault from the engine-ECU memory.Switch off the ignition, then switch it on again to initialise the computer.If the fault reappears, replace the engine management computer.If necessary, modify the configuration of the new ECU in relation to the options fitted on the vehicle.

If the fault is present, replace the engine management computer.If necessary, modify the configuration of the new ECU in relation to the options fitted on the vehicle.


EDC1586VOC1.0


13-28



DF 077PRESENT

OR STORED

EGR valveCC.1 : Short circuit on the +12-volt line.CO.0 : Open circuit or short circuit to earth.1.DEF : Deviation on negative loop.2.DEF : Deviation on positive loop.

NOTES

Conditions for applying diagnostics on stored faults:If the fault reappears stored following:– Clearing of the fault memory and– actuator test "AC007: EGR valve".


CC.1 NOTES None.

Check the connectors on the engine ECU. Repair if necessary.Check the EGR valve connections. Repair if necessary.

Ensure isolation in relation to the +12-volt line of the connection between: Engine ECU, connector B channel M1 channel 5 EGR-valve connector.

If the fault persists, change the EGR valve.

CO.0 NOTES None.

Check the computer connections. Repair if necessary.Check the EGR valve connections. Repair if necessary.

Ensure the continuity and earth-isolation of the connection between: Engine ECU, connector B channel M1 channel 5 EGR-valve sensor connector.

Also ensure insulation of this connection against the connection between: Engine ECU, connector B channel F2 channel 2 EGR-valve connector.

Ensure presence of the +12-volt "relay downstream" voltage on channel 1 of the EGR-valve sensor connector.

Measure the resistance of the EGR valve, across channels 1 and 5.If the resistance is not in the region of 8 ohms ± 0.5 at +20°C,C, change the EGR valve.


EDC1586VOC1.0


13-29



DF 077

(continued)

1.DEF2.DEF

NOTES None.

Check the connectors on the engine ECU. Repair if necessary.Check the EGR valve connections. Repair if necessary.

Measure the conductor resistance of the following connections: ECU connector B channel C2 channel 6 EGR-valve position sensor connector, ECU connector B channel B2 channel 4 EGR-valve position sensor connector, ECU connector B channel F2 channel 2 EGR-valve position sensor connector,Carry out the necessary operations if the resistance is abnormally high.

Measure the resistance of the EGR-valve position sensor, across channels 2 and 4 of the EGR-valve connector.Change the "EGR-valve/position-sensor" unit if the resistance is not in the region of 4 Kohms ± 1.6.

Measure the resistance of the EGR valve, across channels 1 and 5 of the EGR-valve connector.Change the "EGR-valve/position-sensor" unit If the resistance is not in the region of 8 ohms ± 0.5 à +20°C.

If the fault persists, proceed to conformity-checking - Interpretation of commands "AC007".


EDC1586VOC1.0


13-30



DF 078PRESENT

OR STORED

Turbocharging limitation valveCC.1 : Short circuit on the +12-volt line.CO.0 : Open circuit or short circuit to earth.1.DEF : Positive deviation in turbocharging regulation.2.DEF : Negative deviation in turbocharging regulation.

NOTES

Conditions for applying diagnostics on stored faults:The fault reappears stored following:removal of the fault memory and,Actuator test "AC004: Turbocharging pressure limitation valve ".

Special notes:Processing of this fault does not apply for the the Master vehicle type.Use the Elec. 1613 Breakout connector for any work performed on the ECU connector.

CC.1 NOTES None.

Check the connectors on the engine-control ECU. Repair if necessary.Check the turbocharging limitation valve connections. Repair if necessary.

Ensure isolation in relation to the +12-volt line of the connection between: Engine ECU, connector B channel L2 channel 1 turbocharging pressure limitation valve connector.

Check the resistance of the turbocharging pressure limitation valve, across channels 1 and 2. Change the valve if the resistance is not in the region of: 16.5 ohms ± 1.6 at +25°C,/ 22.1 ohms ± 2.2 à +110°C).

If the fault persists, proceed to conformity-checking AC004.

CO.0 NOTES None.

Check the connectors on the engine-control ECU. Repair if necessary.Check the turbocharging limitation valve connections. Repair if necessary.

Ensure the continuity and earth-isolation of the connection between: Engine ECU, connector B channel L2 channel 1 turbocharging pressure limitation valve connector.

Ensure presence of the +12-volt "relay downstream" voltage on channel 2 of the connector of the turbocharging pressure limitation valve.

Check the resistance of the turbocharging pressure limitation valve, across channels 1 and 2. Change the valve If the resistance is not in the region of: 16.5 ohms ± 1.6 at +25°C,/ 22.1 ohms ± 2.2 at +110°C)

If the fault persists, proceed to conformity-checking AC004.


EDC1586VOC1.0


13-31



DF 078

(continued)

1.DEF2.DEF

NOTESProcessing priority in the event of stacked faults:In priority process fault "DF074: turbocharging pressure-sensor" if it is declared present.

Check the connectors on the engine ECU. Repair if necessary.Check the turbocharging limitation valve connections. Repair if necessary.

Check the conductor resistance of the connection between:Engine ECU, connector B channel L2 channel 1 turbocharging pressure limitation valve connector.Repair if necessary.

Check the resistance of the turbocharging pressure limitation valve, across channels 1 and 2. Change the valve If the resistance is not in the region of: 16.5 ohms ±1.6 at +25°C,/ 22.1 ohms ± 2.2 à +110°C).

Perform a road test and display parameter "PR094: CYCLIC OPENING RATIO OF THE TURBOCHARGING PRESSURE LIMITATION VALVE"

If , during revving, parameter "PR094" varies, without noticeable variation of the turbocharging pressure "PR082":

– Check the condition and leaktightness of the air inlet circuit. Perform any necessary repairs.– Check the leaktightness of the vacuum system, from the vacuum pump up to the wastegate-control LDA via the

solenoid valve.– Check the adjustment of the wastegate damper control rod (RM chapter 12: pressure-regulating valve).– Check for correct movement of the wastegate.– Perform any necessary repairs.

If , during revving, parameter "PR094" does not vary and no turbocharging is detected in the engine operation:

– Check the turbocharging pressure-sensor (parameter).– Check the condition and leaktightness of the air inlet circuit.– Check the turbocharger.– Perform any necessary repairs.

– If parameter "PR094" shows no value, change the ECU.

– If, at idling speed the turbocharging pressure "PR082" exceeds atmospheric pressure "PR016": check the wastegate (jamming) and the wastegate valve (solenoid valve jammed open).


EDC1586VOC1.0




DF 079PRESENT

OR STORED

No. 3 immersion-heater relay CC.1 : Short circuit on the +12-volt line.CO.0 : Open circuit or short circuit to earth.

NOTES

Special notes:The No. 3 immersion heater relay supplies immersion heaters No. 2 and No. 3 in parallel. This relay is purple, and takes a current of 50 A.Use the Elec. 1613 Breakout connector for any work on the ECU connector.

Conditions for applying diagnostics on stored faults:If the fault is declared present following: engine-starting followed by a time delay of 30 seconds engine running at idling speed, with the heated windscreen not selected and the engine temperature at starting lower than 70°.

CC.1 NOTES None.

Check the connectors on the engine-control ECU. Repair if necessary.Check the connectors on micro-relay support 5 on engine fuse/relay box. Repair if necessary.

Ensure isolation in relation to the +12-volt line of the connection between:Engine ECU, connector C channel E4 channel 2 of the micro-relay support 5 on engine fuse/relay box.Also ensure this connection is isolated from the following connections:

micro-relay support 5 on engine fuse/relay box channel 1 +12 volts downstream of relays,micro-relay support 5 on engine fuse/relay box channel 3 +12 volts battery (BP 35).

Check the integrity of micro-relay 5 on engine fuse/relay box:– Insulation across channels 3 and 5 of the relay (in rest position).– Measure the coil resistance of micro-relay 5 on engine fuse/relay box:replace the micro-relay if the value across channels 1 and 2 is not in the region of 60 ± 5 ohms at +20°C.

CO.0 NOTES None.

Check the connectors on the engine-control ECU. Repair if necessary.Check the connectors on micro-relay support 5 on the engine fuse/relay box. Repair if necessary.

Ensure the continuity and earth-isolation of the connection between:Engine ECU, connector C channel E4 channel 2 of micro-relay support 5 on the engine fuse/relay box.

Ensure presence of the +12-volt "relay downstream" voltage (BP 17) on channel 1 of micro-relay 11.

Measure the coil resistance of micro-relay 5 on the engine fuse/relay box:Replace the relay if the value across channels 1 and 2 is not in the region of 60 ± 5 ohms at +20°C.


EDC1586VOC1.0

13-32


13-33



DF 081PRESENT

OR STORED

Pre-heating relay circuitCC.1 : Short circuit on the +12-volt line.CO.0 : Open circuit or short circuit to earth.

NOTES


– Clearing of the fault memory and– Actuator test "AC010: PREHEATING RELAY".


CC.1 NOTES None.

Check the connectors on the engine-control ECU. Repair if necessary.Check the pre-heating unit connections. Repair if necessary.

Ensure isolation in relation to the +12-volt line of the connection between: Engine ECU, connector B channel C3 channel 8 pre-postheating unit connector


CO.0 NOTES None.

Check the connectors on the engine-control ECU. Repair if necessary.Check the pre-heating unit connections. Repair if necessary.

Ensure the continuity and earth-isolation of the connection between: Engine ECU, connector B channel C3 channel 8 pre-postheating unit connector



EDC1586VOC1.0


13-34


VDIAG No: 0C(F9Q 754)

DF 082PRESENT

OR STORED

Low pressure pump relay circuitCC.1 : Short circuit on the +12-volt line.CO.0 : Open circuit or short circuit to earth.

NOTES

Conditions for applying diagnostics on stored faults:If the fault reappears stored following:– Clearing of the fault memory and– Actuator test "AC005: LOW-PRESSURE PUMP RELAY COMMAND".

Special notes:– Use the Elec. 1613 Breakout connector for any work on the ECU connector.

– Operation not applicable for engine variant F9Q 750.

CC.1 NOTES None.

Check the connectors on the engine ECU. Repair if necessary.Check the low pressure pump relay mounting connections. Repair if necessary.

Ensure isolation in relation to the +12-volt line of the connection between:Engine ECU, connector C channel A1 channel 2 low-pressure pump relay support.

Also ensure this connection is isolated from the following connections:Low-pressure pump relay support channel 1 channel M2, connector B of the ECU,Low-pressure pump relay support channel 3 +12 volt battery line.

Check the integrity of the relay and the following insulations:– across channels 1 and 2 of the relay,– across channels 3 and 5 of the relay.

Measure the resistance of the low-pressure pump relay coil across channels 1 and 2. Replace the relay if the resistance is not in the region of 85 ± 5 ohms at +20°C.

If the fault persists, change the low pressure pump relay.


EDC1586VOC1.0


13-35



DF 082

(continued)

CO.0 NOTES None.

Check the computer connections. Repair if necessary.Check the connectors on the low-pressure pump relay support. Repair if necessary.

Ensure the continuity and earth-isolation of the connection between:Engine ECU, connector C channel A1 channel 2 low-pressure pump relay support.

Ensure presence of the +12-volt "relay downstream" voltage on channel 1 of the low-pressure pump relay.

Measure the resistance of the low-pressure pump relay coil across channels 1 and 2. Replace the relay if the resistance is not in the region of 85 ± 5 ohms at +20°C.

If the fault persists, change the low pressure pump relay.


EDC1586VOC1.0


13-36



DF 083PRESENT

OR STORED

Fuel pressure solenoid valve circuitCC.1 : Short circuit on the +12-volt line.CO.0 : Open circuit or short circuit to earth.1.DEF : Coherence after ignition switched off.

NOTES

Conditions for applying diagnostics on stored faults:If the fault reappears stored following:Clearing of the fault memory andActuator test "AC006: FUEL-PRESSURE SOLENOID VALVE COMMAND".

Special notes:See Repair Manual, particularly the instructions regarding cleanness requirements for working on the high-pressure direct-injection system.Use the Elec. 1613 Breakout connector for any work on the ECU connector.

CC.1 NOTES None.

Check the connectors on the engine-control ECU. Repair if necessary.Check the fuel pressure solenoid valve connections. Repair if necessary.

With the fuel-pressure solenoid valve connector demated, ensure isolation in relation to the +12-volt line of the connection between: Engine ECU, connector B channel L1 channel 2 fuel-pressure solenoid valve connector.

Measure the resistance of the fuel-pressure solenoid valve across channels 1 and 2. Change the solenoid valve if the value is not in the region of 5 ohms ± 0.5 ohms à 20°C.

CO.0 NOTES None.

Check the computer connections. Repair if necessary.Check the fuel pressure solenoid valve connections. Repair if necessary.

Check the fuel pressure solenoid valve connections. Repair if necessary.Measure the resistance of the fuel-pressure solenoid valve across channels 1 and 2. Change the solenoid valve if the value is not in the region of 5 ohms ± 0.5 ohms at 20°C.

Ensure the continuity and earth-isolation of the connection between: Engine ECU, connector B channel L1 channel 2 fuel-pressure solenoid valve connector.

Ensure presence of the +12-volt "relay downstream" voltage (BP17) on channel 1 of the fuel-pressure solenoid valve.


EDC1586VOC1.0


13-37



DF 083

(continued)

1.DEF NOTESProcessing priority in the event of stacked faults:In priority process fault "DF088: Coherence of flywheel-signal information" if present.

Check the connectors on the engine-control ECU. Repair if necessary.Check the fuel pressure solenoid valve connections. Repair if necessary.

Measure the line resistance of the following connections: Engine ECU, connector B channel H3 channel B engine speed sensor. Engine ECU, connector B channel G3 channel A engine speed sensor.In the event of abnormally high resistance, perform the necessary operations.

Ensure earthing of the engine block.

Measure the conductor resistance of the connection between: Engine ECU, connector B channel L1 channel 2 of the fuel-pressure solenoid valve.In the event of abnormally high resistance, perform the necessary operations.

Measure the resistance of the fuel-pressure solenoid valve across channels 1 and 2. Change the solenoid valve if the value is not in the region of 5 ohms ± 0.5 ohms at 20°C.

If the fault persists, proceed to conformity-checking, Interpretation of commands: "AC006".


EDC1586VOC1.0


13-38



DF 086STORED

Flow after key-off1.DEF : Change the ECU.

1.DEF NOTES

Erase the fault from the ECU memory.Switch off the ignition, then switch it on again to initialise the computer.Start the engine, then switch the ignition off then back on.If the fault reappears, replace the engine management computer.If necessary, modify the configuration of the new computer to match the equipment options fitted on the vehicle.


EDC1586VOC1.0


13-39



DF 088PRESENT

OR STORED

Flywheel signal information consistency1.DEF : Overspeed detected.

NOTES

Conditions for applying diagnostics on stored faults:The fault is declared present following removal of the fault, engine-starting followed by revving exceeding 3500 rpm


1.DEF NOTESThis fault appears following an engine overspeed of > 5200 rpm

Check the connectors on the engine ECU. Repair if necessary.Check the connections of the engine speed sensor. Repair if necessary.

Ensure isolation in relation to the +12-volt line and the earth of the following connections: Engine ECU, connector B channel H3 channel B engine speed sensor, Engine ECU, connector B channel G3 channel A engine speed sensor.Ensure earthing of the engine block.

Measure the motor resistance speed sensor across channels A and B of the sensor.Change the sensor if the resistance value is not in the region of 800 ohms ± 80 at 20C°.

If the fault persists, change the engine speed sensor.


EDC1586VOC1.0


13-40



DF 089PRESENT

OR STORED

Injector control capacitor voltage1.DEF : Overvoltage in the capacitor controlling the injectors.2.DEF : Undervoltage in the capacitor controlling the injectors.

1.DEF2.DEF

NOTES

Conditions for applying diagnostics on stored faults:The fault is declared present after:removal of the fault memory anda time delay of 1 minute engine running.




EDC1586VOC1.0


13-41



DF 090PRESENT

OR STORED

Analog-to-digital converterDEF : Fault stored.1.DEF : Change the ECU.

DEF1.DEF

NOTES None.




EDC1586VOC1.0


13-42



DF 091PRESENT

OR STORED

Sensor No. 1 supply voltage1.DEF : Sensor 1 supply voltage too low.2.DEF : Sensor 1 supply voltage too high.

NOTES

Conditions for applying diagnostics on stored faults:The fault reappears stored following:removal of the faulta time delay of 1 minute engine running.


1.DEF NOTES None.

Check the connectors on the engine ECU. Repair if necessary.Check the connections of the following sensors:– pedal sensor,– fuel pressure sensor,– air flow sensor,– EGR valve position sensor,– turbocharging pressure sensor.

Repair if necessary.

Ensure the continuity of the following connections as well as isolation in relation to earth:Engine ECU, connector A channel E1 channel 6 pedal-sensor connector,Engine ECU, connector B channel H2 channel 3 fuel-pressure-sensor connector,Engine ECU, connector B channel G2 channel 3 air-flow-sensor connector,Engine ECU, connector B channel F2 channel 2 EGR-valve position sensor connector,Engine ECU, connector B channel J2 channel C supercharger pressure-sensor connector.


Ensure the continuity of the following connections, as well as earth presence:Engine ECU, connector A channel B3 channel 4 pedal connector,Engine ECU, connector C channel B3 channel 1 fuel-pressure-sensor connector,Engine ECU, connector C channel A3 channel 2 air-flow-sensor connector,Engine ECU, connector B channel B2 channel 4 EGR-valve position sensor connector,Engine ECU, connector C channel A4 channel A turbocharger pressure sensor connector.


Display parameter "PR090: SENSOR No. 1 SUPPLY VOLTAGE". If this voltage is lower than 4.9 volts, successively de-mate the connectors of all the sensors mentioned above. If the voltage returns to normal, change the incriminated sensor (or sensor connectors). (wait a few seconds between each disconnection to allow the ECU to perform the measurement).If, with all these sensors demated, the voltage is still lower than 4.9 volts, change the ECU.If necessary, modify the configuration of the new ECU in relation to the options fitted on the vehicle.


EDC1586VOC1.0


13-43



DF 091

(continued)

2.DEF NOTES None.

Check the connectors on the engine ECU. Repair if necessary.Check the connections of the following sensors:– pedal sensor,– fuel pressure sensor,– air flow sensor,– EGR valve position sensor,– turbocharging pressure sensor.


Ensure the continuity of the following connections as well as in relation to the +12-volt line:

Engine ECU, connector A channel E1 channel 6 pedal-sensor connector,Engine ECU, connector B channel H2 channel 3 fuel-pressure-sensor connector,Engine ECU, connector B channel G2 channel 3 air-flow-sensor connector,Engine ECU, connector B channel F2 channel 2 EGR-valve position sensor connector,Engine ECU, connector B channel J2 channel C turbocharger pressure-sensor connector.


Ensure the continuity and the earth-isolation of the following connections:

Engine ECU, connector A channel B3 channel 4 pedal connector,Engine ECU, connector C channel B3 channel 1 fuel-pressure-sensor connector,Engine ECU, connector C channel A3 channel 2 air-flow-sensor connector,Engine ECU, connector B channel B2 channel 4 EGR-valve position sensor connector,Engine ECU, connector C channel A4 channel A turbocharger pressure-sensor connector


Display parameter "PR090: SENSOR No. 1 SUPPLY VOLTAGE". If this voltage is greater than 5.1 volts, successively de-mate the connectors of all the sensors mentioned above. If the voltage returns to normal, change the incriminated sensor (or the connectors). (wait a few seconds between each disconnection to allow the ECU to perform the measurement).If, with all these sensors demated, the voltage is still greater than 5.1 volts, change the ECU.If necessary, modify the configuration of the new ECU in relation to the options fitted on the vehicle.


EDC1586VOC1.0


13-44



DF 092PRESENT

OR STORED

Sensor No. 2 supply voltage1.DEF : Sensor No.2 supply voltage too low.2.DEF : Sensor No.2 supply voltage too high.

NOTES

Conditions for applying diagnostics on stored faults:The fault reappears stored following a time delay of 2 minutes engine running.


1.DEF NOTES None.


Ensure the continuity and earth-isolation of the connection between:Engine ECU, connector A channel H2 channel 3 pedal-sensor connector.

Ensure the continuity and earth-isolation of the connection between:Engine ECU, connector A channel A3 channel 5 pedal-sensor connector.

Also ensure the continuity of this connection in relation to the earth.

Display parameter "PR091: Sensor No.2 supply voltage". If the value of this voltage is lower than 4.9 volts, disconnect the pedal-sensor connector and again display PR 091: – If the voltage returns to normal, change the pedal sensor or the connectors.– If the voltage is still lower than 4.9 volts, change the ECU.If necessary, modify the configuration of the new computer to match the equipment options fitted on the vehicle.

2.DEF NOTES None.

Check the computer connections. Repair if necessary.Check the connectors on the pedal sensor. Repair if necessary.

Ensure the continuity and Insulation in relation to the +12-volt line of the connection between:Engine ECU, connector A channel H2 channel 3 pedal-sensor connector.

Ensure continuity of the connection between:Engine ECU, connector A channel A3 channel 5 pedal-sensor connector.

Also ensure the earth continuity of this connection.

Display parameter "PR091: Sensor No.2 supply voltage". If the value of this voltage is greater than 5.1 volts, disconnect the pedal-sensor connector and display PR 091 once again.– If the voltage returns to normal, change the pedal sensor or the connectors.– If the voltage is still greater than 5.1 volts, change the ECU.If necessary, modify the configuration of the new computer to match the equipment options fitted on the vehicle.


EDC1586VOC1.0


13-45



DF 093PRESENT

OR STORED

Microcontroller

NOTES None.

If the fault is present or stored, erase the fault from the engine-ECU memory.Switch the ignition off then back on again to initialise the computer. Carry out a road test.If the fault reappears, replace the engine management computer.If necessary, modify the configuration of the new ECU in relation to the options fitted on the vehicle.


EDC1586VOC1.0




113BOSCH DIESEL INJECTION

DF 094PRESENT

ORSTORED

No. 1 immersion-heater relayCC.1 : Short circuit on the +12 volt line. CO.O : Open circuit or short circuit to earth.

NOTES

Conditions for application of the fault finding strategy on stored fault: If the fault is declared present following: engine-starting followed by a time delay of 30 seconds engine running at idling speed, with the heated windscreen not selected and the engine temperature at starting lower than 70˚.

Special notes: Use the Elec. 1613 Breakout connector for any work on the ECU connector.

CC.1 NOTES None.

Check the connectors on the engine ECU. Repair if necessary. Check the connectors on the micro-relay support 1 on the engine fuse/relay box. Repair if necessary.

Ensure insulation of connection between between +12-volt line and: Engine ECU, connector C channel J4 channel 2 micro-relay support 1 on engine fuse/relay box.

Also ensure this connection is isolated from the following connections:micro-relay support 1 on engine fuse/relay box, channel 1 +12 volts "relay downstream" voltage, micro-relay support 1 on engine fuse/relay box, channel 3 +12 volts battery (BP 35).

Perform an integrity check on micro-relay 1 on the engine fuse/relay box:– Insulation across channels 3 and 5 of the micro-relay (in rest position).– Measure the coil resistance of micro-relay 1 on the engine fuse/relay box:replace the micro-relay if the resistance across channels 1 and 2 is not around 60 ohms ± 5 at +20˚C.


EDC1586VOC1.0

13-46


13-47



DF 094

(continued)

CO.O NOTES None.

Check the computer connections. Repair if necessary. Check the connectors on the micro-relay support 1 on the engine fuse/relay box. Repair if necessary.

Ensure the continuity and earth-isolation of the connection between: Engine ECU, connector C channel J4 channel 2 micro-relay support 1 on the engine fuse/relay box.

Ensure presence of the +12 volts "relay downstream" voltage on channel 1 (BP 17) of micro-relay 1 on the engine fuse/relay box.

Measure the coil resistance of micro-relay 1 on engine fuse/relay box: Replace the micro-relay if the resistance between channels 1 and 2 is not around 60 ohms ± 5 at +20˚C.


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DF 095PRESENT

ORSTORED

Vehicle speed information1.DEF : Vehicle speed too high. 2.DEF : Error in information delivered by the ABS. 3.DEF : incoherence in the vehicle speed.

NOTESConditions for applying diagnostics on stored faults:If the fault reappears stored following removal of the fault and a road test.

If ABS: Run a diagnostic on the ABS. Apply the dedicated fault-finding procedure. If ESP: Run a diagnostic on the ESP. Apply the dedicated fault-finding procedure.


EDC1586VOC1.0


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DF 097PRESENT

ORSTORED

Clutch contact information1.DEF : Coherence with vehicle speed.

NOTES

Conditions for application of the fault finding strategy on stored fault: If the fault arises following a road test exceeding 100 kph.

Processing priority in the event of stacked faults: In priority process fault "DF 095: Information Vehicle speed" if declared present or stored.

Special notes: Use the Elec. 1613 Breakout connector for any work on the engine-control ECU connector.

Check the connectors on the engine ECU. Repair if necessary. Check the clutch sensor connections. Repair if necessary.

Display the state "ET012: CLUTCH-CONTACT SIGNAL". Depress the clutch pedal and check that the clutch status changes to "active".

If it is active,– Reset the ECU. Switch the ignition back on, and perform a road test followed by reading of the fault. If the fault

reappears, go to step 2.

If it is not active,Ensure the switch is adjusted.

– Ensure the continuity and earth-isolation of the connection between:Engine ECU, connector A channel E2 channel 1 clutch switch.

– Ensure presence of earth on track 3 of the clutch switch.

– Check the operation of the clutch switch:– Closing of contact across channels A1 and B3 when the clutch pedal is released.– Openure of the contact across channels A1 and B3 when the clutch pedal is pressed.– Change the switch if necessary.

If the fault persists, erase the fault from the ECU memory. Switch the ignition off then back on again to initialise the computer. Carry out a road test. If the fault reappears, replace the engine management computer. If necessary, modify the configuration of the new ECU in relation to the options fitted on the vehicle.


EDC1586VOC1.0


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DF098STORED

Main relay1.DEF : Relay cutting out too soon. 2.DEF : Relay cutting out too late.

NOTES

Conditions for application of the fault finding strategy on stored fault: The fault reappears stored following removal of the fault and switching-off of the ignition with loss of dialogue and switching back on of the ignition and establishment of dialogue.

1.DEF NOTES None.

Check the connectors on the engine ECU. Repair if necessary. Check the connectors on the main main relay mounting. Repair if necessary.

Check that the battery terminals (+ and -) are tight and in good condition.

Ensure the continuity of the following connections: Main relay channel 5 channels M2 and M3, connector B of the ECU, Main relay channel 2 channel D4, connector B of the ECU.

Ensure serviceability of fuse "F60" on the engine fuse/relay box (crimping of wires on lugs and condition of lugs).

Ensure serviceability of earth connection: channel L3, connector B of the engine-control ECU channel L4, connector B of the engine-control ECU channel M4, connector B of the engine-control ECU

If the fault persists after these checks, change the main relay.


EDC1586VOC1.0


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DF 098

(continued)

2.DEF NOTES None.

Check the computer connections. Repair if necessary. Check the connections of the main relay. Repair if necessary.

Ensure insulation from earth of the following connection: Main relay channel 2 channel D4, connector B of the ECU.

Check the integrity of the main relay (relay removed).– Insulation of contacts across channels 3 and 5– Resistance of coil:Replace the relay if the resistance across channels 1 and 2 is not around 60 ± 5 ohms at +20˚C.

If the fault persists after these checks, change the main relay.


EDC1586VOC1.0


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DF 099PRESENT

ORSTORED

Injector circuit - cylinder 11.DEF : Overcurrent on injector energising current. 2.DEF : Undercurrent on the injector energising current.

NOTES

Conditions for applying diagnostics on stored faults: If the fault reappears stored following:– removal of the fault memory followed by engine-starting.


1.DEF NOTES

Special notes:See Repair Manual, particularly the instructions regarding cleanness requirements for working on the high-pressure direct-injection system.

Check the connectors on the engine ECU. Repair if necessary. Check the connections for injector No.1. Repair if necessary.

Measure the resistance of the No.1 injector: Change the injector If the resistance across channels 1 and 2 is not around: 0.4 ohms ± 10 at +20˚C.

Check the insulation between the following two connections: Engine ECU, connector C channel M1 channel 2 connector to the No.1 injector. Engine ECU, connector C channel M3 channel 1 connector to the No.1 injector.

Check the earth-insulation of the following connection: Engine ECU, connector C channel M3 channel 1 of the connector to the No.1 injector.

If the fault persists, change the injector.


EDC1586VOC1.0


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DF 099

(continued)

2.DEF NOTES


Check the computer connections. Repair if necessary. Check the connections for injector No.1. Repair if necessary.

Ensure the continuity of the following connections:Engine ECU, connector C channel M1 channel 2 connector to the No.1 injector. Engine ECU, connector C channel M3 channel 1 connector to the No.1 injector.

Measure the resistance of the No.1 injector. Change the injector if the resistance across channels 1 and 2 is not around: 0.4 ohms ± 10 at +20˚C.



EDC1586VOC1.0


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DF 100PRESENT

ORSTORED

Injector circuit - cylinder 21.DEF : Overcurrent on the injector energising current. 2.DEF : Undercurrent on the injector energising current.

NOTES



1.DEF NOTES


Check the connectors on the engine ECU. Repair if necessary. Check the connections for injector no. 2. Repair if necessary.

Measure the resistance of the No.2 injector: Change the injector if the resistance across channels 1 and 2 is not around: 0.4 ohms ± 10 at +20˚C.

Check the insulation between the following two connections: Engine ECU, connector C channel L4 channel 2 connector to the No.2 injector, Engine ECU, connector C channel L3 channel 1 connector to the No.2 injector.

Check the earth-insulation of the following connection: Engine ECU, connector C channel L3 channel 1 of the connector to the No.2 injector.



EDC1586VOC1.0


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DF 100

(continued)

2.DEF NOTES


Check the computer connections. Repair if necessary. Check the connections for injector no. 2. Repair if necessary.

Ensure the continuity of the following connections:Engine ECU, connector C channel L4 channel 2 connector to the No.2 injector, Engine ECU, connector C channel L3 channel 1 connector to the No.2 injector,




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DF 101PRESENT

ORSTORED


NOTES



1.DEF NOTES



Measure the resistance of No.3 injector: Change the injector if the resistance across channels 1 and 2 is not around: 0.4 ohms ± 10 at +20˚C.

Check the insulation between the following two connections: Engine ECU, connector C channel M2 channel 2 connector of No.3 injector, Engine ECU, connector C channel L2 channel 1 connector to No.3 injector.

Check the earth-insulation of the following connection: Engine ECU, connector C channel L2 channel 1 of the connector to No.3 injector.



EDC1586VOC1.0


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DF 101

(continued)

2.DEF NOTES



Ensure the continuity of the following connections:Engine ECU, connector C channel M2 channel 2 connector to No.3 injector, Engine ECU, connector C channel L2 channel 1 connector to No.3 injector,




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DF 102PRESENT

ORSTORED


NOTES



1.DEF NOTES



Measure the resistance of the No.4 injector: Change the injector if the resistance across channels 1 and 2 is not around: 0.4 ohms ± 10 at +20˚C.

Check the insulation between the following two connections: Engine ECU, connector C channel L1 channel 2 connector of the No.4 injector. Engine ECU, connector C channel M4 channel 1 connector to the No.4 injector.

Check the earth-insulation of the following connection: Engine ECU, connector C channel M4 channel 1 of the connector to the No.4 injector.



EDC1586VOC1.0


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DF 102

(continued)

2.DEF NOTES



Ensure the continuity of the following connections:Engine ECU, connector C channel L1 channel 2 connector to the No.4 injector. Engine ECU, connector C channel M4 channel 1 connector to the No.4 injector.





13-60



DF 104PRESENT

ORSTORED

No. 2 immersion-heater relayCC.1 : Short circuit on the +12-volt line. CO.O : Open circuit or short circuit to earth.

NOTES

Conditions for application of the fault-finding strategy on stored fault: If the fault is declared present following: engine-starting followed by a time delay of 30 seconds engine running at idling speed, with the heated windscreen not selected and the engine temperature at starting lower than 70˚.

Special notes: Use the Elec. 1613 Breakout connector for any work on the engine-control ECU connector.

CC.1 NOTES None.

Check the connectors on the engine-control ECU. Repair if necessary. Check the connectors on relay mounting 11 on the engine fuse/relay box. Repair if necessary.

Ensure insulation between the +12-volt line of the connection between:Engine ECU, connector B channel F3 channel 2 relay mounting 11 on the engine fuse/relay box. Also ensure this connection is isolated from the following connections:Relay mounting 11 on engine fuse/relay box, channel 1 +12-volt "relay downstream" voltage, Relay mounting 11 on engine fuse/relay box, channel 3 +12-volt battery (BP 35).

Perform an integrity check on relay 11 on the engine fuse/relay box: – Insulation across channels 3 and 5 of the relay (in rest position).– Measure the resistance of the coil in relay 11 on the engine fuse/relay box:Replace the relay if the resistance across channels 1 and 2 is not around 60 ohms ± 5 at +20˚C.


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DF 104

(continued)

CO.O NOTES None.

Check the computer connections. Repair if necessary. Check the connectors on relay mounting 11 on the engine fuse/relay box. Repair if necessary.

Ensure the continuity and earth-isolation of the connection between:Engine ECU, connector B channel F3 channel 2 relay mounting 11 on the engine fuse/relay box.

Ensure presence of the +12-volt "relay downstream" voltage on channel 1 of relay 11 on the engine fuse/relay box.

Measure the resistance of the coil in relay 11 on the engine fuse/relay box: Replace the relay if the resistance across channels 1 and 2 is not around 60 ohms ± 5 at +20˚C.


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DF 105PRESENT

ORSTORED

Voltage stabiliser

If the fault is stored, erase the fault from the engine-ECU memory. Switch the ignition off then back on again to initialise the computer. If the fault reappears, replace the engine management computer. If necessary, modify the configuration of the new ECU in relation to the options fitted on the vehicle.

If the fault is present, replace the engine management computer. If necessary, modify the configuration of the new ECU in relation to the options fitted on the vehicle.


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DF 106PRESENT

ORSTORED

Damper-valve circuitCC.1 : Short circuit on the +12-volt line. CO.O : Open circuit or short circuit to earth.

CC.1 NOTES None.

Check the connectors on the engine-control ECU. Repair if necessary. Check the connectors of the damper-valve solenoid actuator. Repair if necessary.

Measure the resistance of the coil in the damper-valve solenoid actuator across channels 1 and 2. Replace the solenoid actuator if the resistance is not around 16.5 ohms +or- 1.6. Check the insulation in relation to the + 12-volt line of the connection between: Engine-control ECU connector C channel F4 channel 1 solenoid-valve connector.

CO.O NOTES None.

Check the connectors on the engine-control ECU. Repair if necessary. Check the connectors of the damper-valve solenoid actuator. Repair if necessary.

Ensure the continuity and earth-isolation of the connection between:Engine-control ECU connector C channel F4 channel 1 solenoid-valve connector.

Measure the resistance of the coil in the damper-valve solenoid actuator across channels 1 and 2. Replace the solenoid actuator if the resistance is not around 16.5 ohms +or- 1.6.

Ensure presence of 12 volts on channel 2 of the connector on the damper-valve solenoid actuator.


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DF 108PRESENT

ORSTORED

Brake signals1.DEF : Coherence with redundant brakes.

1.DEF NOTES

Conditions for applying diagnostics on stored faults:Asence of fault on the ABS or the ESP, and if the fault arises following removal of the fault and pressing of the brake pedal.

Special notes: Use the Elec. 1613 Breakout connector for any work on the ECU connector.

Check the connectors on the engine-control ECU. Repair if necessary. Check the connectors on the brake-pedal switch. Repair if necessary. Check the connectors on the ABS or ESP ECU's. Repair if necessary.

Check condition "ET047: BRAKING". In normal operation, this condition is INACTIVE when the pedal is not pressed. It becomes active when the pedal is pressed.

Is the "ET 047" state of the brake pedal correctly recognised by the engine ECU?

YESEnsure continuity and insulation in relation to the + 12-volt line of the connection between: Brake-pedal-switch connector channel A3 channel 41 ABS or ESP ECU connector.

Check the condition and adjustment of the brake-pedal switch. Check the operation of the brake-pedal switch: – when the pedal is not pressed: circuit closed across channels B1 and B3 and CIRCUIT OPEN across channels

A1 and A3, – pedal pressed: CIRCUIT OPEN across channels B1 and B3 and circuit closed across channels A1 and A3, Change the switch if necessary.

NOEnsure presence of the +12 volts on channel 1 of the brake-pedal-switch connector.

Ensure the continuity and insulation in relation to the + 12-volt line of the connection between: brake-pedal-switch connector channel B3 channel F3, connector A engine-control ECU.

Check the condition and adjustment of the brake-pedal switch. Check the operation of the brake-pedal switch: – when the pedal is not pressed: circuit closed across channels B1 and B3 and CIRCUIT OPEN across channels

A1 and A3, – pedal pressed: CIRCUIT OPEN across channels B1 and B3 and circuit closed across channels A1 and A3, Change the switch if necessary.


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DF 118PRESENT

ORSTORED

SPEED-CONTROL FUNCTION1.DEF : Cruise-control lever voltage. 2.DEF : Plausibility of deceleration. 3.DEF : Plausibility of cruise-control switch / overspeed governor

1.DEF NOTES

All operations on the connector under the centre cover of the steering wheel necessitates locking-out the airbag ECU.

Special note:It is essential to use the "wiring-diagrams manual" for successful fault-finding.

Check the connectors on the engine-control ECU. Repair if necessary. Check the connectors at the interface of the steering-wheel controls under the centre cover of the steering wheel (See Repair Manual, chapter 88 for removal method). Repair if necessary.

Check the integrity of the steering-wheel controls as follows:

– Demate the connectors of the engine ECU and connect a voltmeter across channels A2 and B2 of connector A of the engine ECU, and note results:

900 ohms (+ or - 10 ohms) for activation of the "Restart" command, (that is, pulsed command "R" on the right-hand side of the steering wheel)

0 ohms (+ 0.8 ohms) for activation of the "Suspend" command (that is, pulsed command "O" on the right-hand side of the steering wheel)

300 ohms (+ or - 10 ohms) for activation of the "Set +" command (that is, the pulsed command on the left-hand side of the steering wheel)

100 ohms (+ or - 10 ohms) for activation of the "Set -" command (that is, the pulsed command on the left-hand side of the steering wheel).

– If the values are incorrect:

perform the previous checks at the black two-channel connector under the centre cover of the steering wheel (by connecting the voltmeter to the female connector across channels 1 and 2). Change the controls If the values are still incorrect. If the values are OK, trace the fault by checking the connection in question (R262), using the wiring-diagrams manual.

– If the values are OK:

Display parameter "PR 047: cruise-control lever voltage": if the voltage is not around 5 volts + or - 0.2 volt, demate connection R262 and display "PR047" once again:

If the voltage is correct, trace the fault, using the wiring-diagrams manual.

If the voltage is still incorrect, change the ECU.

If necessary, modify the configuration of the new ECU in relation to the options fitted on the vehicle.


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DF 118

(continued)

2.DEF NOTES

Processing priority in the event of stacked faults:

In priority process faults "DF 073 or 071: pedal sensor" or "DF 095: vehicle speed sensor" if at least one of the three is present.

Check the connectors of the engine-control ECU. Repair if necessary.

Check the conformity of the accelerator pedal sensor - "PR 005, 009, 092, 093".

3.DEF NOTES None.

Check the connectors on the engine-control ECU. Repair if necessary.

Check the connectors on the ON/OFF switch of the cruise-control/overspeed governor. Repair if necessary.

Check the insulation in relation to the + 12-volt line of the connection between:

Engine ECU connector A channel F2 channel B1 cruise-control/overspeed governor ON/OFF switch connector

Engine ECU connector A channel D2 channel A3 cruise-control/overspeed governor ON/OFF switch connector

Check the operation of the cruise-control/overspeed governor ON/OFF switch.

Switch in rest position:

Insulation between channels A2 and A3

Insulation between channels A2 and B1

Switch on "cruise-control" position:

Insulation between channels A2 and B1

Continuity between channels A2 and A3

Switch on "governor" position:

Insulation between channels A2 and A3

Continuity between channels A2 and B1

If the fault persists, proceed to conformity-checking: "ET 036 and and 126".


EDC1586VOC1.0

BOSCH DIESEL INJECTIONFault finding - Conformity check 13

13-67


VDIAG No: 0C(F9Q 750 and 754) Fault finding - Conformity check

NOTESOnly perform this conformity check if a full check using the fault finding tool revealed no faults. Conditions for performance: Engine stopped, ignition on.

Order Function Description Display and notes Fault finding

1 Battery voltage

ET 001: + after Contact ECU

PR 241: ECU supply voltage

Status CONFIRMED

11.8 < X < 12.8 V

In the event of anomalies, refer to diagnosticPR241

2Pre-postheating

function

ET 011: Information pre-postheating

ET 027: Pre-postheating relay command

Preheating warning light

States CONFIRMED as soon as the ignition is

switched on.

Warning lights controlled by the engine ECU: a few seconds after switching-

on of the ignition

None

3 Booster pumpET 105: Llow-pressure pump relay command

Status CONFIRMED for a few seconds when

switching the ignition on

Not applicable for F9Q 750

4Instrument

panel warning lights

Engine overheating warning light

Electronic fault indicator light

Indicator lights controlled by the engine ECU: a few

seconds after the switching-on of the

ignition

None

5 Switches

ET 012: Clutch-switch signal

ET 154: Brake pedal

Statuses CONFIRMED when pedals operated

None

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NOTESOnly perform this conformity check if a full check using the fault finding tool revealed no faults. Conditions for performance: Engine stopped, ignition on (except ET 140).


6 Speed-limiting ET 140: Speed-limiting

Active: during a road test if the speed is greater than 60 kph, and the overspeed governor switch is set in.

7Cruise-control / overspeed governor

ET 036: Cruise-control switchl

ET 126: Overspeed governor switch

ET 150: Cruise-control / overspeed governor

PR 047: Cruise-control lever voltage

Active when the cruise-control switch is set in (+ illumination of the green indicator light on the instrument panel)

Active when the overspeed governor switch is set in (+ illumination of the amber indicator light on the instrument panel)

Takes the "value" of the active steering-wheel control, that is:

Restart: if pressing "R"

Suspend: if pressing "O"

Less: if pressing "-"

More: if pressing "+"

X = 5 volts +or- 0.2 volt

Selector switch common to both functions. If both are "active" after running diagnostic "DF118 3.DEF", change the engine ECU.

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8 Supply voltage

PR090: Sensor No.1 supply voltage

PR091: Sensor No.2 supply voltage

4.9 V< X <5.1 V

4.9 V< X <5.1 V

None

9Temperature

sensors

PR002: Coolant temperature

PR003: Air temperature

PR001: Fuel temperature

X = engine temp. ± 5˚C

X = vehicle outside air temp. ± 5˚C

X = under-bonnet temp. ± 5˚C

In the event of a problem, consult diagnostic PR002

In the event of a problem, consult diagnosticPR003

Not applicable for engine F9Q754

10Intake

pressures

PR016: Atmospheric pressure

PR082: Turbocharger pressure

PR094: Cyclical opening ratio of turbocharger pressure limitation valve

X =Atmospheric pressure

Engine stopped: PR016 = PR082

for PR082 > PR016, perform the test with the engine running.

X = 5 %



11 EGR valve

PR095: Cyclical opening ratio of EGR valve

PR088: EGR-valve position feedback

PR089: EGR-valve position feedback loop error

X = 5 %

X ~ 0.9 Volts

X = ~ 3 m Volts

In the event of anomalies, proceed to fault findingAC007.

A high PR089 value indicates blocking or seizing of the EGR valve or a deviation on the output-multiplying potentiometer

12 Fuel pressure

PR097: Cyclical opening ratio of manifold pressure regulating valve

PR083: Manifold pressure

X = 5%

0< X< 4 bar

If the engine has just stopped, wait a few moments for these values to occur.

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13Accelerator

pedal sensor

NO-LOAD ACCELERATOR PEDAL PR 008: Pedal-potentiometer voltage - track 1 PR 005: Pedal load

PR 092: Pedal load (track 1)PR 093: Pedal load (track 2) PR 009: Pedal-potentiometer voltage - track 2

NO-LOAD ACCELERATOR PEDAL PR 008: Pedal potentiometer voltage - track 1 PR 005: Pedal load

PR 092: Pedal load (track 1) PR 093: Pedal load (track 2) PR 009: Pedal potentiometer voltage - track 2

X = 0.71 Volt

X = 0 %

X = 0 %

X = 0 %

X = 0.35 Volt

X = 4.1 Volts

X = 100%

X = ~124 %

X = ~124 %

X = 2.1 Volts

If If only one track reacts when the pedal is pressed, change the pedal sensor.

If the voltages measured do not correspond to + or - 0.3 Volts, change the pedal sensor.

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NOTESOnly perform this conformity check if a full check using the fault finding tool revealed no faults. Conditions for performance: Engine warm, idling, no electrical consumers.


14 Idle speed

PR 006: Engine speed

PR 002: coolant temperature

PR 062: Engine speed reference

PR 035: Idling-speed correction

800 rpm ± 50

greater than 80˚C

800 rpm.

X = 0 rpm ± 50

None

15Fuel pressure

regulation

PR 083: Manifold pressure

PR 086: Manifold-loop deviation

PR 097: Cyclical opening ratio of manifold-pressure regulating valve

250 < X < 300 bar

X = ~ 0 bar

20 < X < 25 %

A large difference in the manifold pressure loop indicates a problem, such as pressure-sensor deviation, operating fault on the pressure regulator (sticking or jamming), leakage in the high-pressure circuit, or sticking or jamming of an injector.

16 Fuel

PR 033: Fuel flow

PR 075: Idling-speed fuel-flow reference

X = ~ 7 mm3

X = ~ 6 mm3

None

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NOTESOnly perform this conformity check if a full check using the fault finding tool revealed no faults. Conditions for performance: Engine warm at idling speed, no electrical consumers.


17

Heating/ventilation (air conditioning

selected)

If the injection system authorises compressor operation

In the event of anomalies, refer to the heating/ventilation diagnostics

In the event of a problem on the fan, go to the commandAC011

ET 102 : Air-conditioning demand

and 037: Low-speed fan


Status CONFIRMED

Status CONFIRMED The fan should rotate at

low speed

X max = 920 rpm

If the injection does not authorise compressor operation

ET 102 : Air-conditioning demand

and 037: Low-speed fan


Status CONFIRMED

Status NOT CONFIRMED

X = 835 rpm ± 50

If necessary consult the Repair Manual, chapter 13: "injection/air conditioning strategy".

18Fan

and 037: Fan assembly relay - low speed

PR 002: Coolant temperature

and 038: Fan assembly relay - high speed

PR 002: Coolant temperature


low speed T˚ > at 99˚C


high speed T˚ > at 102˚C

In the event of anomalies, refer to diagnosticAC011

In the event of anomalies, refer to diagnosticAC012

If necessary consult the Repair Manual, chapter 13: "centralised management of the coolant temperature"

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19 Thermal plungers

AC301: No.1 immersion-heater relay



The relay should be heared clicking

(two cycles per second)

In the event of anomaly, refer to diagnosticAC301.



20Turbocharging solenoid valve

AC004: Turbocharging pressure-limitation valve

The solenoid valve should be heared clicking and the

wastegate LDA should operate.


21 Booster pumpAC005: Low-pressure pump relay command

The pump should be heared running

(except F9Q 750)


22Fuel pressure

regulatorAC006: Fuel-pressure solenoid valve command

Place your hand on the valve to feel it operating

In the event of anomaly, refer to the diagnostic AC006.

23 EGR valveAC007: EGR valve command

Place your hand on the valve to feel it operating

In the event of anomaly, refer to diagnostic AC007.

24 Pre-heating relay AC010: Preheating relayThe relay should be

heared clicking None

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NOTESRefer to this conformity check after checks with the diagnostic tool revealed no faults. Conditions for performance: Engine stopped, ignition on.


25

Fan

AC011: Fan assembly relay - low speed

AC012: Fan assembly relay - high speed

The fan should be heared rotting at low speed

(only if the vehicle is fitted with air conditioning)

The fan should be heared running at high speed

(only If the vehicle is fitted with air conditioning)



(for vehicles without air conditioning, only the AC011 command is operational. It causes the fan to run at high speed!)

26

Damper valve AC593: Damper valve

The solenoid valve should be heared sticking and the damper valve should be

seen to operate

In the event of anomaly, refer to diagnostic AC593.

EDC1586VOC1.0

BOSCH DIESEL INJECTIONDiagnostics - Control interpretation 13


VDIAG No: 0C(F9Q 750 and 754) Diagnostics - Control interpretation

AC004

TURBOCHARGING PRESSURE LIMITATION VALVE.

NOTESPerform this diagnostic after detecting an anomaly in the parameters menu or following interpretation of an unresolved fault.

When this command is issued, the solenoid valve should be heared clicking (ten cycles). Simultaneous control of the wastegate damper will only occur if a negative pressure of 600 mbars is applied to the solenoid-valve input. This is because driving the damper valve during engine shutoff means that atmospheric pressure takes over the vacuum reserve.

– Check the resistance of the turbocharging pressure limitation valve, between channels 1 and 2. Change the valve if the resistance is not in the region of: 16.5 ohms ±1.6 at +25˚C / 22.1 ohms ± 2.2 at + 110˚C.

– Check the leaktightness of the vacuum system, from the vacuum pump up to the wastegate-control LDA.

– Check the efficiency of the vacuum pump.

– Check the adjustment of the wastegate control rod (repair manual chapter 12: pressure-regulating valve).

– Check for correct sliding of the wastegate damper.

– Check the state and leaktightness of the air-inlet circuit.


AFTER REPAIR Restart the conformity check from the beginning.

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AC005 LOW-PRESSURE PUMP RELAY

NOTES

No faults must be present or stored. Perform this diagnostic after detecting an anomaly in the command menu, or following a problem priming the diesel circuit. Method not applicable for engines fitted with a CP3 high-pressure pump. (except CP3 on Master G9T 720).

CAUTION: In the event of a problem on the immobiliser, the low-pressure pump operates nonetheless.

Check the following using the wiring diagram:

– state of the low-pressure pump relay,

– presence of the + 12V battery voltage on channel 3 of the low-pressure pump relay,

– continuity of the connection between channel 5 of the relay connector and channel 1 of the low-pressure pump motor.

– the condition of the motor,

– continuity of the connection between channel 2 of the engine connector and the earth.


If the problem persists, check that relay "A" is commanded by the engine ECU as follows:

– disconnect relay "A", place a 50 to 100-ohm resistor on the relay support, in place of the coil, and connect a voltmeter as follows:

Positive terminal on + 12 volts batt.,

Negative terminal on channel 2 of relay support "A".

– Delete the fault.– Run command AC005,

If the voltmeter does not indicate the battery voltage (ten one-second cycles), change the ECU.

If necessary, modify the configuration of the new computer to match the equipment options available on the vehicle.

If the relay and the pump operate but the low pressure does not attain the normal operating value, that is: 1.5 to 3 bar.

Ensure there is fuel in the tank,

Ensure leaktightness of the LP and HP circuits.

Measure the delivery of the low-pressure pump at the fuel-filter outlet. If the rate is low, perform the same measurement at the fuel-filter inlet. Replace the incriminated item: LP pump or fuel filter.

If the problem persists:

Rinse the high-pressure regulation circuit (refer to procedure in Help Section).

Ensure leaktightness of the injectors (refer to diagnostic in Help Section).


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AC006

FUEL-PRESSURE SOLENOID VALVE

NOTESPerform this diagnostic after detecting an anomaly in the parameters menu; following interpretation of an unresolved fault; or following a customer complaint.

With the regulator connector mated, connect an oscilloscope (or multimeter with COR measurement) between terminals 1 and 2 of the fuel-pressure solenoid valve.

Run command AC006 . The solenoid valve receives a cycle of 2 different COR (~ 20% and ~ 70%) for the time the command is issued. If no regulator control signal is measured, change the ECU. If necessary, modify the configuration of the new ECU in relation to the options fitted on the vehicle

If command AC006 is operational, display "PR097" check the values according to the engine speeds.

(Not applicable for pump CP3)

Engine stopped, ignition on COR = 5%,

At idle speed COR = 15% en F9Q and 22% en G9T,

with foot down under load or without starter motor COR = 35% on F9Q and 100% on G9T,

If PR097 increases, without a noticeable reduction in the manifold pressure, this may indicate sticking or jamming of the pressure solenoid valve (jammed closed).

in this case, and also for a manifold overpressure:

Ensure correct operation of the rail pressure sensor - see "diagnostics for rail pressure sensor",

Perform a "rinsing of the high-pressure pump", see procedure in Help Section of this document.

If PR097 diminishes without a noticeable increase in the manifold pressure, this may indicate sticking or a jamming of the pressure solenoid valve (jammed open).

in this case, and also for a manifold under-pressure:

Proceed to leaktightness test of the LP and HP diesel circuit (visuals, smells etc.): pump, regulator, pipes, manifold and injector unions etc.).

If the problem persists, – Check that the low-pressure diesel circuit is primed - see "diagnostics for the low-pressure circuit",– Ensure correct operation of the rail pressure sensor - see "diagnostics for rail pressure sensor",– Rinse the high-pressure pump - see procedure in Help Section of this document,– Ensure correct operation of the injectors - see "injector diagnostics",– Ensure correct operation of the high-pressure pump - see "diagnostics for the high-pressure pump".

IMPORTANT:See Repair Manual, particularly the instructions regarding cleanness requirements for working on the high-pressure direct-injection system.


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AC007

EGR VALVE

NOTESPerform this diagnostic after detecting an anomaly in the parameters menu; following unresolved fault DF077 (1 or 2 faults); or following a customer complaint. (lack of performance)

CAUTION: for all F9Q engines, do not take account of parameters "PR088: position-slaving of EGR VALVE" and "PR089: difference in the EGR-VALVE position-feedback loop".

– Disconnect the connector and remove the EGR valve,– Check that the valve is in the "closed" position, then return to service condition (cleaning) or, if necessary,

change the EGR unit.– Reconnect the connector, erase the fault and run command AC007.– The valve receives a cycle of two successive COR - 25% and 75% (displayable on the oscilloscope or a

multimeter including COR measurement). Check for correct movement of the damper valve (positioned open at 25% and 75%), as well as the general condition (gumming, friction points etc.).

– Check that the valve closes correctly when the command is complete.

If "PR095" still indicates 0, check on the oscilloscope that there is no COR control input - if necessary change the ECU.



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AC011

LOW-SPEED FAN RELAY

NOTESThere must be no present or stored faults. Perform this diagnostic after detecting an anomaly in the "commands" menu or following an engine-cooling or air-conditioning problem.


– Condition of fuse F15 (60 A).

– Condition of low-speed fan relay (identified R9).

– Presence of the +12-volt battery supply on channel 3 of the low-speed fan relay support.

– The continuity of the connection between channel 5 of the relay and channel 1 of the fan resistor.

– Condition of low-speed resistor (resistance and connectivity).

– The continuity of the connection between channel 2 of the resistor connector and channel 2 of the fan connector.

– Condition of fan.

– The continuity of the connection between channel 1 of the fan connector and the earth.


If the problem persists, check for commanding of relay "R9" by the engine ECU as follows:

– Disconnect relay "R9", place a install a 50- to 100-ohm resistor on the relay support, in place of the coil, and connect a voltmeter as follows:

Positive terminal on the + 12 volts batt.

Negative terminal on channel 2 of relay support "R9",





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AC012

HIGH-SPEED FAN

NOTESThere must be no present or stored faults. Perform this diagnostic after detecting an anomaly in the "commands" menu or following a problem with the engine cooling.


– condition of fuse F15 (60 A).

– condition of high-speed fan relay (marked R10).

– presence of +12-volt battery supply on channel 3 of the high-speed fan relay support.

– continuity of the connection between channel 5 of the high-speed relay support and channel 2 of the fan connector.

– condition of fan.

– earth-continuity of connection to channel 1 of the fan connector.



– disconnect relay "R10", install a 50- to 100-ohm resistor on the relay support, in place of the coil, and connect a voltmeter as follows:

Positive terminal on the + 12 volts batt.,

Negative terminal on channel 2 of relay support "R10".





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AC301

IMMERSION-HEATER RELAY No.1

NOTES

There must be no present or stored faults. Perform this diagnostic in the event of anomaly on the function identified in the "commands" menu or in the event of a problem on the passenger-compartment heating/demisting.

Check the connectors on the engine ECU. Repair if necessary.

Check the connectors on relay support "R1". Repair if necessary.

Check the connectors on the immersion heater 1. Repair if necessary.


fuse No.14 (70A),

presence of the +12 volts batt. supply on channel No.3 of relay support "R1",

continuity between channel No.5 and the immersion-heater 1 supply lug (refer to repair manual),

the resistance of the immersion heater: 0.45 ohms ± 0.05 at 20 C˚,

presence of the earth on the water box (immersion-heater support).

Also check the level and leaktightness of the cooling circuit.


If the problem persists, check for commanding of relay "R1" by the engine ECU, as follows:





If the voltmeter does not indicate the battery voltage (two cycles per second), change the ECU.



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AC302

NO.2 IMMERSION-HEATER RELAY

NOTES


Special note: The "No.2 immersion-heater relay", supplies immersion heaters 2 and 3 in parallel.



Check the connectors on immersion heaters 2 and 4. Repair if necessary.


fuse No.13 (70A),


continuity between channel 87 of relay support "R11" and the lugs immersion-heater supply lugs 2 and 4,

The resistance of the immersion heaters: 0.45 ohms ± 0.05 at 20 C˚,

presence of the earth on the water box (immersion-heater support),

the integrity of the relay, (coil and contact resistance).




– disconnect the relay, install a 50- to 100-ohm resistor on the relay support, in place of the coil, and connect a voltmeter as follows:


Negative terminal on channel No.85 of relay support "R11". – Delete the fault.– Run command AC302.

If the voltmeter does not indicate the battery voltage (two cycles per second), change the ECU. If necessary, modify the configuration of the new computer to match the equipment options available on the vehicle.


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AC002

NO.3 IMMERSION-HEATER RELAY

NOTES




Check the connectors on immersion heater 4. Repair if necessary.


fuse No.14 (70A),


continuity between channel No.5 and the immersion-heater 3 supply lug (refer to repair manual),

the resistance of the immersion heater: 0.45 ohms ± 0.05 at 20 C ,

presence of the earth on the water box (immersion-heater support).








If the voltmeter does not indicate the battery voltage (two cycles per second), change the ECU.



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AC593

DAMPER VALVE

NOTESPerform this diagnostic after detecting an anomaly in the "commands" menu or after an unresolved fault "DF 019: 2. DEF".

When this command is issued, the solenoid valve should be heared clicking (ten cycles). Simultaneous control of the damper valve can only be checked by applying 600 mbar of vacuum at the solenoid-valve intake. this is because commanding the damper valve during engine shutoff allows atmospheric pressure to take over the vacuum reserve.

If commanding the solenoid valve does not result in activation of the damper valve;

install a vacuum pump on the hose connecting the solenoid valve to the control LDA, and apply 600 mbar of vacuum solenoid-valve side:

– If the LDA commands the damper valve, check the operation of the solenoid valve (jamming) as well as leaktightness of the vacuum system from the vacuum pump up to the solenoid valve (pump, valves, hose, unions, vacuum reserve).


– If the LDA does not command the damper valve, check that the damper valve is not jamming, and check for leaktightness of the circuit from the solenoid valve up to the LDA (included).


After repairs and before running the "damper valve" command, ensure the engine is run for a while to recreate a negative pressure in the vacuum reserve.


EDC1586VOC1.0

BOSCH DIESEL INJECTIONDiagnostics - Parameter interpretation 13

13-85


VDIAG No: 0C(F9Q 750 and 754) Diagnostics - Parameter interpretation

PR002

COOLANT TEMPERATURE

NOTESThere must be no present or stored faults. Perform this diagnostic after detecting an anomaly in the parameters menu.

Check that the cooling circuit is topped up and properly bled.

Perform the required operations.

If the value read is incoherent, check that the sensor is following the "resistance versus temperature" calibration curve (CTN).

Change the sensor if it is drifting (sensor drift is often the result of an electrical shock).

Check for absence of spurious resistance on the following lines:

– between channels E1, connector B of the ECU and channel 2 of the temperature-sensor connector,

– between channels K3, connector B of the ECU and channel 3 of the tempeature-ensor connector.

Repair.


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PR003

AIR TEMPERATURE

NOTESThere must be no present or stored faults. Perform this diagnostic after detecting an anomaly in the "parameters" menu.

If the value read is incoherent, check that the sensor is following the "resistance versus temperature" (NTC) curve.

Change the sensor if it is drifting (sensor drift is often the result of an electrical shock).

Jamming of the air temperature sensor when hot causes white smoke when cold, and misadjustment of the turbo if t˚<60˚.

Jamming of the air temperature sensor when cold causes a excessive consumption; when hot, the result is engine noise.

Check for absence of spurious resistance on the following lines:

– between channels D3, connector B of the ECU and channel 1 of the temperature-sensor connector,

– between channels A3, connector C of the ECU and channel 2 of the temperature-sensor connector.

Repair.


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PR016

ATMOSPHERIC PRESSURE SENSOR

NOTES Perform this diagnostic after detecting an anomaly in the "parameters" menu.

The atmospheric pressure sensor is inside the engine-control ECU, and no repairs are possible.

If the parameter is not correct, reset the ECU. Check parameter PR016 with the engine running and the engine stopped but the ignition on.

If the value read is not correct, change the ECU.



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PR082

TURBOCHARGING PRESSURE SENSOR


The sensor is mounted on the inlet manifold.

Check the leaktightness of the inlet circuit: unions, hose, sleeves, intercooler, turbo.

Check the efficiency of the turbo.

If the fault persists after repairs, change the turbocharging pressure sensor.


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PR241

COMPUTER SUPPLY VOLTAGE


Ignition on

If the voltage is less than the recommended minimum, the battery is undercharged:

Check the charging circuit to determine the cause of this fault.

If the voltage is above the recommended maximum, the battery may be overcharged:

Check that the charging voltage is correct with and without electrical users.

At idle speed

If the voltage is less than the minimum recommended, the charging voltage is too low:

Check the charging circuit to determine the cause of this fault.

If the voltage is above the recommended maximum, the charging voltage is too high:

The alternator regulator is faulty. Repair this fault and check the electrolyte level in the battery.


EDC1586VOC1.0

BOSCH DIESEL INJECTIONDiagnostics - Customer complaints 13


VDIAG No: 0C(F9Q 750 and 754) Diagnostics - Customer complaints

CUSTOMER COMPLAINTS

NOTESBefore analysing this customer complaint, check for absence of faults, and conformity (or otherwise) of the parameters and states, using the diagnostic tool. If the customer complaint is not ironed out, perform the following checks:

NO COMMUNICATION WITH THE ECU

Chart 1

STARTING FAULTS Chart 2

INJECTION NOISE Chart 3

POOR PERFORMANCE Chart 4

IRREGULAR ENGINE OPERATION

Chart 5

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BOSCH DIESEL INJECTIONFault finding - Fault charts 13

13-91


VDIAG No: 0C(F9Q 750 and 754) Fault finding - Fault charts

Chart 1 NO COMMUNICATION WITH ENGINE ECU

NOTES None.

Ensure that the tool is not the cause of the fault by trying to communicate with a computer on another vehicle. If the tool is not responsible, and dialogue is not possible with any other ECU on the same vehicle, the cause could be a faulty ECU disturbing lines K and L.

To trace which one, process of elimination, successively disconnecting each ECU.

Also check the battery voltage and the ignition-switch accessory line (PR241 and ET001).

– Check the presence and condition of the engine fuses on the "engine fuse/relay box" (see wiring diagram).– Check the ECU supply on the connector side.– Check the earth connections. – Check the ECU connector (crimping of wires to lugs, and condition of lugs).

Check the supply to the diagnostic socket.

+ Before-ignition on channel 16

+ After-ignition on channel 1

Earth on channels 4 and 5

Ensure the continuity and insulation of the following lines:

Engine ECU, connector A channel C3 diagnostic socket channel 7 line K

Engine ECU, connector A channel D3 diagnostic socket channel 15 line L

If the dialogue is still impossible after these various checks, replace the engine ECU. If necessary, modify the configuration of the new computer to match the equipment options available on the vehicle.

AFTER REPAIR Perform a road test followed by a test using the diagnostic tool.

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Chart 2STARTING PROBLEMS

(no starting or difficulty e starting the engine)

NOTESBefore analysing this customer complaint, check for absence of faults, and conformity (or otherwise) of the "parameters" and states, using the diagnostic tool. If the customer complaint is not ironed out, perform the following checks:

See next pageimpossible

Starting is difficult or impossible

difficult

Check the engine earth connections.

Ensure engine speed reaches 250 rpm under starter motor, displayable in the screen parameter.

Ensure the correct fuel is being used.

Check the priming of the low-pressure diesel circuit.

Check the operation of the pre-heater plugs.

Check the condition of the diesel filter (no clogging, connection of unions).

Ensure leaktightness of the high-pressure circuit - pump, pipes, unions (visual check + smells).

Check the condition of the air filter (gumming).

Check the position of the EGR valve (jamming, mechanical sticking) - see Interpretation of commands: AC 007).

Check the coherence of the coolant temperature sensor signal (compare the value given by the tool with that given by a workshop temperature gauge).

Ensure correct operation of the injectors (return leakage too high, gumming, sticking: see injector diagnostics).

Rinse the high-pressure regulation circuit (refer to "diagnostic-aide").

Check the compressions: (Run compression test on the Clip. CAUTION: disconnect the coolant temperature sensor in order to produce a starter-motor time delay of 15 seconds, as when testing with a compression tester).


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Chart 2

(continued)

STARTING IMPOSSIBLE (or vehicle starts and stalls immediately)


Check the immobiliser using the diagnostic tool.Unserviceable

Display ET003 and ET110, both must be inactive (refer to diag anti-starting).

OK

Check the position and serviceability of the impact switch.

Check the battery charge as well as the condition and tightness of the lugs and the engine earth connections.

Check the engine fuses (+ supports, wires and lugs).

Check the integrity of the main relay (+ supports, wires and lugs).

Check the synchronisation of the camshaft and TDC sensors: ET115.

Make sure there is some diesel in the tank.

YES

Ensure correct operation of the injectors (no internal leaks, gumming or jamming)

Check the engine compression. (CAUTION: disconnect the coolant temperature sensor in order to obtain a starter-motor time delay of 15 seconds).

test

Activate the starter motor: Does the pressure increase normally in the manifold?

HP = 170 bar at ~ 250 rpm

NO

Ensure the low-pressure diesel circuit is primed.

Check the condition of the diesel filter (no clogging, unions connected).

Check the leaktightness of the high-pressure circuit - pump, pipes, unions (visual check + smells).

Ensure that the pressure sensor has not drifted (difference in manifold-pressure loop).

Ensure that the pressure regulator is not jammed or seized. Rinse the HP regulation circuit, see method in Help Section of this document.

Check whether any of the injectors is leaking into the return circuit.


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Chart 3 INJECTION NOISE

NOTESBefore analysing this customer complaint, check for absence of faults, and conformity (or otherwise) of the parameters and states, using the diagnostic tool. If the customer complaint is not ironed out, perform the following checks.

A just-audible clacking noise under low load conditions between 1800 and 2500 rpm is a characteristic of the normal operating noise for this engine. No intervention is recommended. This noise should disappear as the engine gains life.

If occurring following a cold-starting:

: Ensure the preheating function is operating.

Check the Coherence : of the fuel and engine temperatures; Diagnostic PR002 and PR001: of the manifold pressure signal; diagnostic PR083

If the complaint persists, run the injector diagnostics.

If occurring at idling speed:

Check the condition of the injector connectors and contact, and the pressure regulator.Ensure the proper fuel is being used.Check for absence of air in the LP fuel circuit.Ensure the diesel fuel heater is getting supplied.

Condition of air filter. Ensure the position of the EGR valve is correct (interpreting commands AC 007). Check the coherence of the airflow signal.

If the complaint persists, run the injector diagnostics followed by the high-pressure pump diagnostics.

If occurring at all engine speeds,

Check the conformity of the synchronisation (camshaft / engine speed sensors): ET 115.

Check the condition of connectors and injector contact and de pressure regulator.

Ensure the proper fuel is being used.

Check the coherence and the stability of the manifold pressure signal.

If occurring at transient engine speeds:

If "yes": Check the cyclical opening ratio of the manifold-pressure regulation valve, (pump CP1 only) - PR097; if it increases, this indicates that manifold pressure is too high.

Check whether the high-pressure regulation valve is seized.


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Chart 4 POOR PERFORMANCE


Is the poor performance accompanied by fumes?

If yes: Check whether the wastegate or wastegate solenoid valve are jammed in the open position (use in particular diag. AC004).

Is the poor performance il accompanied by smoke at full load?

If "yes": Check whether the EGR valve is jammed in the open position. Use in particular diag. AC007.

Is engine running on all cylinders?

If "no": Check whether any of the injectors are jammed in the closed position

Perform conformity checks on the pedal sensor, the atmospheric pressure sensor and the EGR valve.

Check the level of gumming of the air filter.

Ensure there are no foreign bodies on the flowmeter grille.

Check the condition of the intercooler (clogging).

Check the leaktightness of the inlet circuit between the flowmeter and the turbo.

Check the leaktightness of the oil-vapour extraction circuit.

Check whether the pressure regulator is jammed or seized (use in particular Diag. AC006).

Check whether the wastegate or the wastegate solenoid valve are jammed closed.

Check the efficiency of the turbocompressor.

Check the coherence of the following signals: flowmeter, coolant temperature sensor, turbocharging pressure sensor, fuel-temperature sensor (no drift).

Check the engine compression.

NO

NO


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Chart 5 IRREGULAR ENGINE OPERATION


– Ensure the low-pressure circuit is primed (no air in the circuit).

– Check the conformity of the manifold pressures: 250 bar at idling speed and 1350 bar under load during full accelerator movement.

– Check the conformity of the airflow: 25 to 50 kg/h of airflow at 800 rpm, 400 kg/h under load during full accelerator movement.

If this is not the case, check the leaktightness of the inlet circuit and ensure there are no foreign bodies on the flowmeter grille.

– Check the operation of the turbocharging function (refer to AC 004).

– Check the injectors: with engine running at idling speed, disconnect the injectors one after the other:

If disconnection of one of the injectors causes no variation in operation, this implies an electrical, or mechanical problem. Eliminate any possible connector problems, then change the incriminated injector if necessary.

Delete the faults caused by the multiple disconnections, then perform a conformity check.

– Check the operation of the manifld pressure sensor:

With the engine running, disconnect the pressure sensor. The ECU goes to degraded mode and selects a default pressure value. If the engine stabilises and resumes regular operation after a period of "adaptation", the sensor is faulty.

(CAUTION: The vehicle performance is limited and the engine will emit light smoke when the pressure sensor is disconnected).

– Check the engine compression.


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BOSCH DIESEL INJECTIONFault finding - Help 13

13-97


VDIAG No: 0C(F9Q 750 and 754) Fault finding - Help

Procedure for rinsing the high-pressure pump regulation circuit.

This operation is designed to flush any particles likely to jam or upset operation of the pressure regulator, into the return circuit. The particles are then entrapped by the diesel filter.

The rinsing operation involves simultaneously pressurising the boost circuit of the high-pressure pump and commanding the manifold-pressure regulating solenoid valve (pump CP1).

For pump CP1:

Connect the diagnostic tool.

Enter the command mode.

On the engine fuse/relay box, shunt the power circuit of the low-pressure pump relay.

At the diagnostic tool, run command "AC 006: fuel-pressure solenoid valve" (3 to 5 times).

Start the engine and note the manifold pressurevalues:

If the operation improved the manifold pressure values:

Repeat the rinsing procedure to complete the operation. During the road test which follows, perform several full-load accelerator movements to expel the impureties to the tank.

If the operation has no effect on the manifold pressure values:

Ensure the low-pressure diesel circuit is primed (B.P. 1.5 at 2 bar).

Ensure no leakage on the HP circuit

Check the condition of the diesel filter (measuring the flow after the filter).

Check the leaktightness of the high-pressure circuit; pump, pipes, unions.

Ensure correct operation of the injectors (return leakage too high, gumming, sticking: see injector diagnostics).

Correct operation of the pressure sensor (refer to "Interpreting parameters" Diagnostics - PR 083")

If all these checks are OK, change the pressure regulator.

EDC1586VOC1.0

BOSCH DIESEL INJECTIONDiagnostics - Glossaries 13

13-98


VDIAG No: 0C(F9Q 750 and 754) Diagnostics - Glossaries

Engine speed F9Q 750 and 754: -Idling

-Off-lad maximum

-Full-load maximum

800 ± 50 rpm

4700 ± 150 rpm

4500 ± 100 rpm

High-pressure pump F9Q750

High-pressure pump F9Q754

CP 3

CP 1

250 to 1350 bar

250 to 1350 bar

Boost pump (only on F9Q754) 2.5 to 4 bar / flow 80 to 100 l/h minimum

Pressure sensorscrewed on manifold

Injector R <= 0.4 Ohms ± 10 % max. pressure 1600 bar

Pressure regulator R = 5 Ohms at 20˚C (not removable on CP3)

Accelerator-pedal sensor

R track 1 = 1200 Ohms ± 480

R track 2 = 1700 Ohms ± 680

Heater plug R = 0.6 Ohm w/ connector disconnected

Air temperature sensor R = 2170 Ohms at 20˚C

Diesel temperature sensor R = 2050 Ohms at 25˚ C (only on F9Q 750)

Coolant temperature sensor R = 2252 Ohms ± 112 at 25˚C

Engine speed sensor R = 800 Ohms ± 80 at 20˚C

Camshaft sensor Hall-effect sensor

Turbocharging pressure sensor R = 4 Kohms across channels A and C

R = 5 Kohms across channels B and C

R = 9 Kohms across channels A and B

Wastegate control solenoid valve R = 16.5 Ohm ± 1 at 25˚C

Intake-damper control solenoid valve R = 44 Ohms ± 10% at 25˚C

Air flow meter Channel 1: Air temperature signal Channel 4: +12 Volt battery

Channel 2: - flowmeter Channel 5: air flow signal

Channel 3: +5 Volt flowmeter Channel 6: Earth

EGR valve R across channels 1 and 5 (coil): = 8 Ohms ± 0.5 at 20˚C

R across channels 2 and 4 (output-multiplying potentiometer) = 4 Kohms ± 1.6 at 20˚C

Feedback signal on channel 6

Thermal plungersR = 0.45 Ohm ± 0.05 at 20˚C

(R = resistance)

EDC1586VOC1.0

INJECTION

COMPUTER TYPE: SAGEM 2000PROGRAMME No.: A3

VDIAG No: 08

FAULT FINDING

CONTENTS

Page

Preamble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01

Fault interpretation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 03

Checking conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Interpretation of States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Interpretation of parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Interpretation of commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Customer complaints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Fault-finding chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

INJECTIONFault finding - Introduction 17

17-1

SAGEM2000PROGRAMME No: A3

VDIAG No.: 08

117INJECTIONFault finding - Introduction

GENERAL APPROACH TO FAULT FINDING:

– Using one of the diagnostic tools to identify the system fitted on the vehicle (reading the computer family - "SAGEM 2000 Vdiag 08").


– Applying the information supplied in the Preamble chapters.

– Reading the faults stored in the computer memory and using the "Interpretation of faults" section of the documents.Rappel: Each fault is interpreted for a particular type of storage (fault present, fault stored, fault present or stored). The checks defined for handling each fault are therefore only to be performed if the fault stated by the fault finding tool is interpreted in the document for its type of storage. The type of storage should be considered when setting up the diagnostic tool when the ignition is switched off and back on again.If a fault is interpreted when it is declared "stored", the application conditions for the diagnostic are shown in the "CONSIGNE" frame. When the conditions are not satisfied, use the fault finding to check the circuit of the faulty part since the fault is no longer present on the vehicle. Perform the same operation when a fault is stated as "stored" by the fault finding tool but is only interpreted in the documentation for a "present" fault.

– Perform the conformity check (identifying any malfunctions not yet declared by the system self-test), and application of the associated diagnostics depending on the results.

– Validation of the repair (disappearance of the phenomenon reported by the customer).

– Employing diagnostics for "customer complaint" if problem persists.

ESSENTIAL TOOLING FOR WORKING WITH THE "SAGEM 2000 VDIAG 08" SYSTEM:

– Diagnostic tools (except XR 25).– Multimeter.– Breakout connector: ELE 1590

To run diagnostics on this system, it is essential have the following items:

– the wiring diagram for the operation of the vehicle concerned,– the tools listed under the heading "Special tooling required".

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VDIAG No: 08 Fault finding - Introduction

If the information obtained by the diagnostic tool requires checking of electrical continuity, connect the ELE 1590 breakout connector.

The ELE 1590 breakout connector comprises a 112-channel base fixed to a printed circuit comprising 112 coppered surfaces numbered from 1 to 112.

Using the wiring diagrams, it is easy to identify connections or other parts needing to be checked.

IMPORTANT:

* All checks using the ELE 1590 breakout connector must performed with the battery disconnected.

* The breakout connector is designed to be used with an ohmmeter only. Under no circumstances should 12 Volts be applied to the test points.

JSAA3081.0

INJECTIONDiagnostics - Fault Interpretation 17

17-3


VDIAG No: 08 Diagnostics - Fault Interpretation

DF 002PRESENT

OR STORED

THROTTLE POTENTIOMETER CIRCUIT1 DEF = Coherence between channel 1 and channel 2

REFERENCEConditions for applying diagnostic on stored faults:

The fault is declared stored following variation of the engine speed.

Check the connection and the status of the connector of the throttle position potentiometer.Change the connector if necessary.

Check the throttle position potentiometer resistance (the resistance is zero or equal to infinity in the event of a permanent fault).Check that resistance of the potentiometer correctly follows its curve, by pressing the throttle from no load to full load.Check that the throttle is driving the potentiometer.Correct or change the throttle position potentiometer if necessary.

Connect the breakout connector in place of the ECU and check the insulation, the continuity and absence of spurious resistance on the connections between:

Computer channel G4, connector B Throttle position potentiometerComputer channel G3, connector B Throttle position potentiometerComputer channel G2, connector B Throttle position potentiometerComputer channel D3, connector B Throttle position potentiometer


If the problem is not resolved, pay no more attention to this fault.

AFTER REPAIRFollow the instructions to confirm repair.Deal with any other possible faults.Erase the stored faults

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DF 003PRESENT

ORSTORED

AIR TEMPERATURE SENSOR CIRCUITDEF = Non-identified electrical failureO.B.D. = Panne O.B.D. (On Board Diagnostic)

REFERENCEConditions for applying diagnostic on stored faults:

The fault is declared present following tripping of the fan with the engine running.

DEF REFERENCEIfthe fault is stored but has changed to "present" with DEF, run the diagnostics.

Check mating and condition of the air temperature sensor connector.Change the connector if necessary.

Ceck that the resistance of the air temperature sensor is not nulll or equal to infinity (unequivocal failure of the sensor).Change the air temperature sensor if necessary.


Computer channel E3, connector B Air temperature sensor

Computer channel E2, connector B Air temperature sensor


Check the the resistance of the sensor at different temperatures.Replace the sensor if necessary.

If the problem has still not been solved, deal with the other faults and then proceed to the conformity check.

AFTER REPAIR

After repairs, the fault may change to ''OBD", in this case, pay no further attention to it. It will need to be erased before performing a conformity check, but after processing all other faults.Run the reference, if the fault is stored or of the OBD type, then move on to the other faults, if any.

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DF 003

(continued)

O.B.D. REFERENCEIf the fault is present with O.B.D. (On Board Diagnostic) but has changed to "present" with DEF, look in the "DEF" section''.

The failure is not actually present (othewise there would be "DEF") but it has been detected several times.It is therefore necessary to check the circuit without changing any parts that are not clearly identified as faulty (therefore the computer must not be changed). For these checks, the idea is to employ the method used for a ''DEF''.

AFTER REPAIR

After repairs, the fault may change to ''OBD"; in this case, do not process further. It will have to be erased before running a conformity check but after processing all other faults. Run the instructions, if the fault is stored or of the OBD type, then move on to the other faults, if any.

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DF 004PRESENT

ORSTORED

COOLANT TEMPERATURE SENSOR CIRCUITDEF = Non-identified electrical failureO.B.D. = O.B.D. failure(On Board Diagnostic)

INSTRUCTIONSConditions for applying diagnostic on stored faults:

The fault is declared present following tripping of the fan with the engine running.

DEF INSTRUCTIONSIf the fault is stored but has changed to "present" with DEF, run the diagnostics.

Check mating and condition of the coolant temperature sensor connector.Change the connector if necessary.

check that the resistance of the water coolant temperature sensor is not null or equal to infinity (failure franche of the sensor).Change the coolant temperature sensor if necessary.


Computer channel F2, connector B coolant temperature sensorComputer channel F4, connector B coolant temperature sensor


Check the resistance of the sensor at different temperatures (consult the Help section).Replace the sensor if necessary.


AFTER REPAIR

After repairs, the fault may change to ''OBD"; in this case, do not process further. It will have to be erased before running a conformity check but after processing all other faults.Run the instructions, if the fault is stored or of the OBD type, then move on to the other faults, if any.

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DF 004

(continued)

O.B.D. INSTRUCTIONSIf the fault is present with O.B.D. (On Board Diagnostic) but has changed to "present" with DEF, look in the "DEF" section''.

The failure is not not actually present (othewise there would be "DEF") but it has been detected several times. It is therefore necessary to check the circuit without changing any parts that are not clearly identified as faulty (therefore the computer must not be changed). For these checks, the idea is to employ the method used for a ''DEF''.

AFTER REPAIR


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VDIAG No: 08

DF 005PRESENT

ORSTORED

PRESSURE SENSOR CIRCUITDEF = Non-identified electrical failureO.B.D. = O.B.D. failure(On Board Diagnostic)

INSTRUCTIONS

Conditions for applying diagnostic on stored faults:The fault is declared present after:– switching the ignition off and dialogue lossAND– switching the ignition back on and entering the dialogueAND– a 10-second dwell with a minimum speed of 608 rpm.

DEFCheck the status of the pressure sensor connector.Change the connector if necessary.

Check that the pressure sensor is connected pneumatically


Computer channel H2, connector B Pressure sensorComputer channel H3, connector B Pressure sensorComputer channel H4, connector B Pressure sensor


Using a vacuum pump, check the coherence of the manifold pressure - PR001. Change the sensor if necessary.


AFTER REPAIR

After repairs, the fault may change to ''OBD"; in this case, do not process further.It will have to be erased before running a conformity check but after processing all other faults. Run the instructions, if the fault is stored or of the OBD type, then move on to the other faults, if any.

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DF 005

(continued)


The failure is not not actually present (othewise there would be "DEF") but it has been detected several times.It is therefore necessary to check the circuit without changing any parts that are not clearly identified as faulty (therefore the computer must not be changed). For these checks, the idea is to employ the method used for a ''DEF''.

AFTER REPAIR


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DF 006PRESENT

ORSTORED

PINKING SENSOR CIRCUITDEF = Non-identified electrical failureO.B.D. = O.B.D. failure(On Board Diagnostic)

INSTRUCTIONS

Conditions for applying diagnostic on stored faults:

The fault is declared present during a road test with engine warm and engine speed high.


Check the mating and condition of the pinking sensor connector.Change the connector if necessary.

Check clamping of the pinking sensor on the engine block.Repair if necessary.


Computer channel A2, connector B Pinking sensorComputer channel B2, connector B Pinking sensorComputer channel C2, connector B Pinking sensor screening


Check the average pinking signal: PR013If PR 013 is close to zero, change the pinking sensor (if in doubt, consult the conformity check).


AFTER REPAIR


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DF 006

(continued)


The failure is not not actually present (othewise there would be "DEF") but it has been detected several times. It is therefore necessary to check the circuit without changing any parts that are not clearly identified as faulty (therefore the computer must not be changed). For these checks, the idea is to employ the method used for a ''DEF''.

AFTER REPAIR


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DF 008PRESENT

ORSTORED

FUEL PUMP CONTROL RELAY CIRCUITCO0 = Open circuit or short-circuit to earth CC1 = Short-circuit on + 12 V DEF = Non-identified electrical failure O.B.D. = O.B.D. failure (On Board Diagnostic)


The fault is declared present following a one-minute dwell with the engine running.

OC0CC1

INSTRUCTIONSIf the fault is stored but has changed to "present" with CO0 or CC1, run the diagnostics.

Check the mating and condition of the fuel pump relay connector.Change the connector if necessary.

Disconnect the relay.Check, ignition on, for +12 V on track 1 of the fuel pump relayRepair if necessary.

Check the fuel pump relay coil.Change the fuel pump relay if necessary.

Check the insulation and the continuity of the connection between:

Computer channel D1, connector C fuel-pump relay



AFTER REPAIR


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DF 008

(continued)

O.B.D. INSTRUCTIONSIf the fault is present with O.B.D. (On Board Diagnostic) but has changed to "present" with CC1 or CO0, refer to instructions for ''CC1, CO0''.

The failure is not not actually present (othewise there would be CO0 or CC1) but it has been detected several times. It is therefore necessary to check the circuit without changing any parts that are not clearly identified as faulty (therefore the computer must not be changed). For these checks, the idea is to employ the method used for a ''CO0 and CC1''.

AFTER REPAIR


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DF 009PRESENT

ORSTORED

ACTUATOR CONTROL RELAY CIRCUITDEF = Non-identified electrical failure


The fault is declared present following a one-minute dwell with the engine running.

Check the status of the battery and the vehicle earths.Repair if necessary.

Check the mating and general condition of the actuator relay connector.Change the connector if necessary.

Check the actuator relay coil.Change the actuator relay if necessary.

Check the presence of 12 V on track 1 of the actuator relay.Rectify the line to the fuse.


Injection ECU channel D4, connector B actuator relay.



AFTER REPAIRFollow the instructions to confirm repair.Deal with any other possible faults.Erase the fault memory.

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DF 010

PRESENT

LOW SPEED FAN ASSEMBLY CIRCUITCO0 = Open circuit or short-circuit to earthCC1 = Short-circuit on + 12 VDEF = Non-identified electrical failure

INSTRUCTIONSThe fault on the coolant temperature sensor circuit - DF004 - should to be processed in priority.

Check the connection and the state of the connector to the low-speed fan relay.Change the connector if necessary.

Disconnect the low-speed fan relay.With the ignition on, check for presence of the 12 Volts on channel 1 of the relay.Repair if necessary.

Check the resistance of the relay coil.Change the low-speed fan relay if necessary.

Connect the breakout connector in place of the ECU and check the the insulation, the continuity and absence of spurious resistance on the connection between:

Computer channel C2, connector C Low-speed fan relayComputer channel F1, connector C Low-speed fan relay


AFTER REPAIRFollow the instructions to confirm repair. Deal with any other possible faults. Erase the fault memory.

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DF 011PRESENT

ORSTORED

FAULT WARNING LIGHT CIRCUITDEF = Non-identified electrical failureCO0 = Open circuit or short-circuit to earthCC1 = Short-circuit on +12-volt line

INSTRUCTIONS Switch on the ignition.

Test the multiplex network

AFTER REPAIR None

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DF 014PRESENT

ORSTORED

SOLENOID VALVE CIRCUIT BLEED CANISTERCO0 = Open circuit or short-circuit to earth CC1 = Short-circuit on +12-volt line DEF = Non-identified electrical failure O.B.D. = O.B.D. failure (On Board Diagnostic)

INSTRUCTIONS None

CC1OC0

INSTRUCTIONSIf the fault is stored but has changed to "present" with CC1 or CCO, run the diagnostics.

Check the connection and the state of the canister bleed connector.Change the connector if necessary.

With the ignition on, check for the presence of 12 V on the canister bleed valve.Repair if necessary.

Check the resistance of the canister bleed valve.Replace the valve if necessary.

Connect the breakout connector in place of the ECU and check the insulation, the continuity and absence of spurious resistance on the connection between:

Computer channel E1. connector C canister bleed valve



AFTER REPAIR


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DF 014

(continued)

O.B.D. INSTRUCTIONSIf the fault is present with O.B.D. (On Board Diagnostic) but has changed to "present" with CC1 or CO0, refer to instructions for ''CC1, CO0''.

The failure is not actually present (othewise there would be CC1 or CO0) but it has been detected several times. It is therefore necessary to check the circuit without changing any parts that are not clearly identified as faulty (therefore the computer must not be changed). For these checks, the idea is to employ the method used for a ''CC1, CO0''.

AFTER REPAIR


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DF 017PRESENT

ORSTORED

FLYWHEEL SIGNAL INFORMATION1 DEF = Fault with engine-flywheel target 2 DEF = Absence signal dent1 O.B.D. = (On Board Diagnostic) failure OBD: engine-flywheel target 2 O.B.D. = failure OBD: NO flywheel signal

INSTRUCTIONS

The pressure sensor should not be failed when running this diagnostic test.


The fault is declared present following starter-motor activation for 10 seconds.ORThe fault is declared present following a dwell of 2 minutes with the engine running.

1DEF2DEF

INSTRUCTIONSIf the fault is stored but has changed to "present" with 1DEF or 2DEF, run the diagnostics.

Check the mating and condition of the target sensor connector.

Change the connector if necessary.

Check the resistance of the target sensor.

Replace the sensor if necessary.


Computer channel E4, connector B Target sensorComputer channel F3, connector B Target sensor


If 1 DEF, check the state of the flywheel.


AFTER REPAIR

After repairs, the fault may change to ''1OBD or 2OBD"; in this case, do not process further. It will have to be erased before running a conformity check but after processing all other faults. Run the instructions, if the fault is stored or of the OBD type, then move on to the other faults, if any.

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DF 017

(continued)

1OBD2OBD INSTRUCTIONS

If the fault is present with 1OBD or 2OBD but has changed to "present" with 1DEF or 2DEF, refer to instructions for ''1DEF, 2DEF''.

The failure is not actually present (othewise there would be 1DEF or 2DEF) but it has been detected several times. It is therefore necessary to check the circuit without changing any parts that are not clearly identified as faulty (therefore the computer must not be changed). For these checks, the idea is to employ the method used for a ''1DEF and 2DEF''.

AFTER REPAIR

After repairs, the fault may change to ''1OBD or 2OBD"; in this case, do not process further.It will have to be erased before running a conformity check but after processing all other faults. Run the instructions, if the fault is stored or of the OBD type, then move on to the other faults, if any.

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DF 018PRESENT

ORSTORED

UPSTREAM OXYGEN PROBE HEATER CIRCUITCO0 = Open circuit or short-circuit to earth CC. 1 = Short-circuit on +12-volt line 1 DEF = Non-identified electrical failure 2 DEF = Heating capacity of oxygen probe outside tolerance 1 O.B.D. = (On Board Diagnostic) OBD failure: heating upstream oxygen probe 2 O.B.D. = OBD failure: heating capacity upstream oxygen probe

INSTRUCTIONSConditions for applying diagnostic on stored faults.

The fault is declared present following a dwell of 10 seconds with the engine running.

OC0CC1

2DEFINSTRUCTIONS

If the fault is stored but has changed to "present" with CO0, CC1 or 2DEF, run the diagnostics.

Check the mating and condition of the oxygen probe connector.Change the connector if necessary.

Check the OXYGEN PROBE heating resistance.Change the OXYGEN PROBE if necessary.

With ignition on, check for presence of the 12 volts on the oxygen probe.Rectify the electrical line to the actuator relay.

Connect the breakout connector in place of the ECU; Check the insulation, the continuity, and absence of spurious resistance on the connection between:

Computer channel G1. connector C Oxygen probe



1OBD2OBD INSTRUCTIONS

If the fault is present with 1OBD or 2OBD but has changed to "present" with CO0 or CC1 or 2DEF, refer to instructions for "CO0, CC1. 2DEF".

The failure is not actually present (othewise there would be CO0 or CC1 or 2DEF) but it has been detected several times. It is therefore necessary to check the circuit without changing any parts that are not clearly identified as faulty (therefore the computer must not be changed). For these checks, the idea is to employ the method used for a ''CO0, CC1 and 2DEF''.

AFTER REPAIR

After repairs, the fault may change to ''1OBD or 2OBD"; in this case, give it no further attention. It will have to be erased before running a conformity check but after processing all other faults. Run the instructions, if the fault is stored or of the OBD type, then move on to the other faults, if any.

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DF 019PRESENT

ORSTORED

SUPPLY1.DEF = electrical failure on the +12-volt line after actuator relay

INSTRUCTIONS

Actuator relay control circuit DF009 should not be failed for running this diagnostic.


The fault is declared present after:– switching the ignition off and dialogue lossAND– switching the ignition on and entering dialogue.

Check the state of the battery and and the vehicle earth connections.Repair if necessary.

Check the connection and the status of the actuator relay connectorChange the connector if necessary.

Undo the clip on the relay support.With ignition on, check for presence of the 12 volts on channel 5 of the actuator relay.

No 12 v on channel 5

Disconnect the relay and check for presence of the 12 V on channel 3 of the relay supportReturn to service condition if necessary

Change the relay

12 V present on channel 5

Check the insulation, the continuity and absence of spurious resistance on the connections between:

Injection ECU channel G2, connector C. Injection-actuator relay

Return the line to service condition if necessary.



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DF 021PRESENT

ORSTORED

IMMOBILISERDEF = Non-identified electrical failure


Test the multiplex network.

AFTER REPAIR None

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VDIAG No: 08

DF 022PRESENT

COMPUTER1.DEF = Computer failure 2.DEF = Computer failure: motorised choke-valve command 3.DEF = Backup memory zone failure 4.DEF = Immobiliser memory zone failure

INSTRUCTIONS None

1DEF2DEF

Computer defective or not conform.Replace the injection computer.

3DEF4DEF

Do not change the injection computer immediately.

Carry out the following procedure:

– Switch on and enter into dialogue with the computer.– Clear the computer memory.– Switch off and wait for loss of dialogue with the computer.– Switch on and enter into dialogue with the computer.If the computer fault is still present, carry out this procedure again. If the computer fault is still present after the fifth deletion attempt, change the injection computer.

AFTER REPAIR Erase the fault memory.

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VDIAG No: 08

DF 030PRESENT

HIGH-SPEED FAN CIRCUITCO0 = Open circuit or short-circuit to earth CC1 = Short-circuit on + 12 V DEF = Non-identified electrical failure

INSTRUCTIONSCoolant-temperature sensor circuit DF004 should not be failed for running this diagnostic.

Check the high-speed fan relay connector for condition and proper mating.Change the connector if necessary.

Disconnect the high-speed fan relay.With the ignition on, check for presence of the 12 Volts on channel 1 of the relay.Repair if necessary.

Check the resistance of the relay coil.Change the high-speed fan relay if necessary.


Computer channel F2, connector C High-speed fan relay



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VDIAG No: 08

DF 032PRESENT

ORSTORED

COOLANT TEMPERATURE OVERHEAT TELL-TALE CIRCUIT CO0 = Open circuit or short-circuit to earth CC1 = Short-circuit on +12-volt line DEF = Non-identified electrical failure

INSTRUCTIONS


The fault is declared present following a dwell of 10 seconds with the engine running above 3800 rpm.

Check the mating and condition of the overheat tell-tale line connector. Change the connector if necessary.

Check the status of the tell-tale light (if it is not lit). Change if necessary.

Check that the 12 volts is feeding to the indicator light. Rectify the line to the fuse.


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17-27


VDIAG No: 08

DF 038PRESENT

ORSTORED

DOWNSTREAM OXYGEN PROBE HEATER CIRCUITCO.0 = Open circuit or short-circuit to earth CC.1 = Short-circuit on +12-volt line 1 DEF = Non-identified electrical failure 2 DEF = Heating capacity of the oxygen probe outside tolerance 1 O.B.D. = (On Board Diagnostic) OBD failure: downstream oxygen probe heating 2 O.B.D. = OBD failure: heating capacity of downstream oxygen probe

INSTRUCTIONS

Conditions for applying diagnostic on present faults.

The fault is declared present after:– Tripping of the fan with the engine runningAND– a dwell of one minute with low acceleration.

OC0CC1

2DEFINSTRUCTIONS

If the fault is stored but has changed to "present" with CO0, CC1 or 2DEF, run the diagnostics.


Check the OXYGEN PROBE heating resistance.Change the OXYGEN PROBE if necessary.

Check for presence of the 12 volts (after actuator relay) on the oxygen probe.Rectify the electrical line to the actuator relay.

Connect the breakout connector in place of the ECU and check the insulation, the continuity, and absence of spurious resistance on the connection between:

Computer channel G3, connector C Oxygen probe



1OBD2OBD

INSTRUCTIONSIf the fault is present with 1OBD or 2OBD but has changed to "present" with CO0 or CC1 or 2DEF, refer to instructions for ''CO0, CC1. 2DEF".

The failure is not actually present (othewise there would be CO0 or CC1 or 2DEF) but it has been detected several times. It is therefore necessary to check the circuit without changing any parts that are not clearly identified as faulty (therefore the computer must not be changed). For these checks, the idea is to employ the method used for a ''CO0, CC1 and 2DEF''.

AFTER REPAIR


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VDIAG No: 08

DF 052PRESENT

ORSTORED

CYLINDER INJECTOR CIRCUIT 1CO = CIRCUIT OPEN CC0 = Short-circuit to earth CC1 = Short-circuit on +12V O.B.D. = OBD failure (On Board Diagnostic) DEF = Non-identified electrical failure

INSTRUCTIONS



COCC0CC1

INSTRUCTIONSIf the fault is stored but has changed to "present" with CO, CC0 or CC1, run the diagnostics.

Check the injector 1 resistance. Change the injector if necessary.

With the ignition on, check for presence of the +12 volts on channel 1 of the injector-1 connector

Check the insulation, the continuity and absence of spurious resistance on the connection between:

Injection ECU channel L4, connector B injector 1



AFTER REPAIR


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VDIAG No: 08

DF 052

(continued)

O.B.D. INSTRUCTIONSIf the fault is present with O.B.D. (On Board Diagnostic) but has changed to "present" with CO, CC0 or CC1, refer to instructions for ''CO, CC0, CC1''.

The failure is not actually present (othewise there would be CO, CC0 or CC1) but it has been detected several times. It is therefore necessary to check the circuit without changing any parts that are not clearly identified as faulty (therefore the computer must not be changed). For these checks, the idea is to employ the method used for a ''CO, CC0, CC1''.

AFTER REPAIR


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VDIAG No: 08

DF 053PRESENT

ORSTORED

CYLINDER INJECTOR CIRCUIT 2CO = CIRCUIT OPEN CC0 = Short-circuit to earth CC1 = Short-circuit on +12V DEF = Non-identified electrical failure O.B.D. = OBD failure(On Board Diagnostic)

INSTRUCTIONS



COCC0CC1




Check the insulation, the continuity and absence of spurious resistance on the connection between:




AFTER REPAIR


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VDIAG No: 08

DF 053

(continued)



AFTER REPAIR


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VDIAG No: 08

DF 054PRESENT

ORSTORED

CYLINDER INJECTOR CIRCUIT 3CO = CIRCUIT OPEN CC0 = Short-circuit to earthCC1 = Short-circuit on +12V DEF = Non-identified electrical failure O.B.D. = OBD failure (On Board Diagnostic)



COCC0CC1



With the ignition on, check for presence of the +12 volts on channel 1 of the injector 3 connector





AFTER REPAIR


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VDIAG No: 08

DF 054

(continued)



AFTER REPAIR


JSAA3081.0


17-34


VDIAG No: 08

DF 055PRESENT

ORSTORED

CYLINDER INJECTOR CIRCUIT 4DEF = Non-identified electrical failureCO = Circuit open CC0 = Short-circuit to earth CC1 = Short-circuit on +12V O.B.D. = OBD failure (On Board Diagnostic)



COCC0CC1





Injection ECU channel M2, connector B injector 4



AFTER REPAIR


JSAA3081.0


17-35


VDIAG No: 08

DF 055

(continued)



AFTER REPAIR


JSAA3081.0


17-36


VDIAG No: 08

DF 057PRESENT

ORSTORED

UPSTREAM OXYGEN PROBE CIRCUITDEF = Non-identified electrical failure O.B.D. = O.B.D. failure (On Board Diagnostic)

INSTRUCTIONS


The fault is declared present following a 5-minute dwell in richness-ratio regulation (engine running).



Ensure absence of air leaks.

If the vehicle is used frequently in towns, carry out a decarbonisation operation.

With the ignition on, check for presence of the + 12 V (after actuator relay) on the oxygen probe.Repair if necessary.


Computer channel C1, connector C Oxygen probe Computer channel B1, connector C Oxygen probe


Change the oxygen probe if the incident persists.


AFTER REPAIR


JSAA3081.0


17-37


VDIAG No: 08

DF 057

(continued)


The failure is not actually present (othewise there would be "DEF") but it has been detected several times. It is therefore necessary to check the circuit without changing any parts that are not clearly identified as faulty (therefore the computer must not be changed). For these checks, the idea is to employ the method used for a ''DEF''.

AFTER REPAIR


JSAA3081.0


17-38


VDIAG No: 08

DF 058PRESENT

ORSTORED

DOWNSTREAM OXYGEN PROBE CIRCUITDEF = Non-identified electrical failure O.B.D. = O.B.D. failure (On Board Diagnostic)

INSTRUCTIONS


The fault is declared present after:– Responsive-driving road test after operation of the fanAND– dual richness loop ET027 active.ORThe fault is declared present if:– Responsive-driving road test after operation of the fanAND– immediately followed by a road test on gradient with no-load input

(deceleration phase).



Ensure absence of air leaks.


With the ignition on, check for presence of the + 12 V (after actuator relay) on the oxygen probe.Repair if necessary.


Computer channel B2, connector C Oxygen probe Computer channel A2, connector C Oxygen probe




AFTER REPAIR


JSAA3081.0


17-39


VDIAG No: 08

DF 058

(continued)


The failure is not actually present (othewise there would be "DEF") but it has been detected several times.It is therefore necessary to check the circuit without changing any parts that are not clearly identified as faulty (therefore the computer must not be changed). For these checks, the idea is to employ the method used for a ''DEF''.

AFTER REPAIR


JSAA3081.0


17-40


VDIAG No: 08

DF 061PRESENT

ORSTORED

IGNITION COIL CIRCUIT 1-4CO0 = Open circuit or short-circuit to earthCC1 = Short-circuit on +12-volt lineDEF = Non-identified electrical failure O.B.D. = O.B.D. failure (On Board Diagnostic)

INSTRUCTIONS

The fuel pump relay fault should not be present: DF008


The fault is declared present following a 10-second dwell in engine running or at starter speed.

OC0CC1

INSTRUCTIONS If the fault is stored but has changed to "present" with CO0 or CC1, run the diagnostics.

Check the resistance of coils 1 and 4.Replace if necessary.

Connect the breakout connector in place of the ECU and check the insulation and the continuity of the connection between:

Computer channel H2, connector C Coil 1



channel 1 of coil 1 channel 2 of coil 4


With the ignition on, check for presence of the 12 V on channel 3 of the fuel-pump relay.Repair if necessary.

Check the insulation, the continuity and absence of spurious resistance on the line on channel 1 of coil 4.Repair if necessary.

With the engine running, check the presence of the 12 V on channel 5 of the fuel-pump relay.Change the relay if necessary.


AFTER REPAIR


JSAA3081.0


17-41


VDIAG No: 08

DF 061

(continued)

O.B.D. INSTRUCTIONSIf the fault is present with O.B.D. (On Board Diagnostic) but has changed to "present" with CO0 or CC1, refer to instructions for ''CO0, CC1''.

The failure is not actually present (othewise there would be CO0 or CC1) but it has been detected several times. It is therefore necessary to check the circuit without changing any parts that are not clearly identified as faulty (therefore the computer must not be changed).For these checks, the idea is to employ the method used for a ''CO0 and CC1''.

AFTER REPAIR


JSAA3081.0


17-42



DF 062PRESENT

ORSTORED

IGNITION COIL CIRCUIT 2-3DEF = Non-identified electrical failure CO0 = Open circuit or short-circuit to earthCC1 = Short-circuit on 12 VoltsO.B.D. = O.B.D. failure (On Board Diagnostic)

INSTRUCTIONS

The fuel pump relay fault should not be present: DF008


The fault is declared present following a 10-second dwell in engine running or at starter speed.

OC0CC1

INSTRUCTIONSIf the fault is stored but has changed to "present" with CO0 or CC1, run the diagnostics.

Check the resistance of coils 2 and 3.Replace if necessary.


Computer channel H3, connector C Coil 2



channel 1 of coil 2 Channel 2 of coil 3


With the ignition on, check for presence of the 12 V on channel 3 of the fuel-pump relay.Repair if necessary.

Check the insulation, the continuity and absence of spurious resistance on the line on channel 1 of coil 3.Repair if necessary.

With the engine running, check the presence of the 12 V on channel 5 of the fuel-pump relay.Change the relay if necessary.


AFTER REPAIR

After repairs, the fault may change to "OBD"; in this case, do not process further.It will have to be erased before running a conformity check but after processing all other faults. Run the instructions, if the fault is stored or of the OBD type, then move on to the other faults, if any.

JSAA3081.0


17-43



DF 062

(continued)

O.B.D. INSTRUCTIONSIf the fault is present with O.B.D. (On Board Diagnostic) but has changed to "present" with CO0 or CC1, refer to instructions for ''CO0, CC1''.

The failure is not actually present (othewise there would be CO0 or CC1) but it has been detected several times. It is therefore necessary to check the circuit without changing any parts that are not clearly identified as faulty (therefore the computer must not be changed). For these checks, the idea is to employ the method used for a ''CO0 and CC1''.

AFTER REPAIR


JSAA3081.0


17-44



DF 063PRESENT

CAMSHAFT SHIFTERCO0 = Open circuit or short-circuit to earthCC1 = Short-circuit on +12-volt lineDEF = Non-identified electrical failure

INSTRUCTIONS None

Check the connector on the camshaft-shifter solenoid valve for condition and proper mating.Change the connector if necessary.

With the ignition on, check for the presence of 12 V on the camshaft-shifter solenoid valve.Repair if necessary.

Check the resistance of the camshaft-shifter solenoid valve.Change the solenoid valve if necessary.


Computer channel E2, connector C camshaft-shifter solenoid valve




JSAA3081.0


17-45



DF 064PRESENT

ORSTORED

VEHICLE SPEED SIGNALDEF = Non-identified electrical failure O.B.D. = O.B.D. failure (On Board Diagnostic)



AFTER REPAIR None

JSAA3081.0


17-46



DF 082PRESENT

ORSTORED

PETROL/LPG CONNECTION DEF = Non-identified electrical failure



AFTER REPAIR None

JSAA3081.0


17-47



DF 102PRESENT

OXYGEN-PROBE OPERATING FAULTO.B.D. = O.B.D. failure (On Board Diagnostic) 1 O B D = O.B.D. failure detected during driving

INSTRUCTIONS None

Check theconnector on the upstream oxygen probe (mating and condition).Change the connector if necessary.

Check for absence of air leakage on the exhaust system.


Check the heating resistance of the upstream oxygen probe.Change the OXYGEN PROBE if necessary.

With the ignition on, check for presence of the + 12 V (after actuator relay) on channel A on the upstream oxygen probe.Repair if necessary.


Computer channel C1. connector C Oxygen probeComputer channel B1. connector C Oxygen probeComputer channel G1. connector C Oxygen probe



AFTER REPAIR

The statuses ET170, ET187, ET188 are useful for checking whether this fault was repaired correctly.However, driving conditions are not monitorable in after-sales operations. The "Vehicle Features" booklet may nevertheless give a procedure for validating repair of this fault.

JSAA3081.0


17-48



DF 106PRESENT

CATALYTIC-CONVERTER OPERATING FAULTO.B.D. = O.B.D. failure (On Board Diagnostic) 1 O B D = OBD failure present 2 O B D = OBD failure detected during driving

INSTRUCTIONS None

Check for absence of air leaks on the exhaust system.Repair if necessary.

Visually check the condition of the catalytic converter. a distortion may explain why it is malfunctioning.

Visually check absence of thermal shock. Projection de cold water on the hot catalytic converter could lead to destruction of the latter.

Ensure absence of excessive consumption of oil or coolant.Ask the Customer if he has used an additive or other products of this kind. The said types of product can cause pollution of the catalytic converter and damage its performance sooner or later.

Check for absence of the misfiring (DEF 109 and DEF 110). This could destroy the catalytic converter.

If the cause of the destruction is identified, it is possible to change the catalytic converter. If you change the catalytic converter without finding the cause, the new catalytic converter could be quickly destroyed.

AFTER REPAIR

The statuses ET170, ET171. ET172, ET173, ET187, ET188 are useful for checking whether this fault was repaired correctly.However, driving conditions are not monitorable in after-sales conditions. The "Vehicle Features" booklet may nevertheless give a procedure for validating repair of this fault.

JSAA3081.0


17-49



DF 109PRESENT

POLLUTANT MISFIRESO.B.D. = O.B.D. failure (On Board Diagnostic) 1 O B D = OBD failure detected during driving

INSTRUCTIONS

ET093 - Misfire on cylinder 1ET094 - Misfire on cylinder 2ET095 - Misfire on cylinder 3ET096 - Misfire on cylinder 4give information on the nature and location of the failure.

One cylinder declared faulty -

ET093 or ET 094 or ET095 or ET096

For this reason, the problem is probably due to an item associated with this cylinder only:– Problem on the injector– Problem on the spark plug– Problem on the high-tension lead

Cylinders 1 and 4 or cylinders 2 and 3 declared faulty -

ET093 and ET096 or ET094 and

ET095

For this reason, the problem is probably due to an item associated with this pair of cylinders only:– Problem on the high-voltage side of the coil– Problem on the control side of the coil.

Four cylinders declared faulty -

ET093 and ET094 and ET095 and

ET096

For this reason, the problem is probably due to an item associated with all the cylinders.– Problem with petrol filter– Problem with petrol pump– Problem with type of petrol.

If this method does not solve the problem, refer to diagnostic DF109 cont'd

AFTER REPAIR

Ensure that all the faults have been processed.Erase the stored faults. It is not necessary to erase the programming.Checking the correct state of repair of the system entails:– no more electrical faults– programming established– engine hot (minimum 75°)– Establish idling speed with all electrical users engaged for 15 minutes.If the fault resurfaces, continue the diagnostic.

JSAA3081.0


17-50


VDIAG No: 08

DF 109

(continued)

INSTRUCTIONS

ET093 - Misfire on cylinder 1ET094 - Misfire on cylinder 2ET095 - Misfire on cylinder 3ET096 - Misfire on cylinder 4Give information on the nature and location of the failure.

Check the ignition system.Repair if necessary.

Check the engine compressionRepair if necessary.

Check the engine target.Repair if necessary.

If no anomalies are found, there is a problem on the fuel system.It is therefore necessary to check the following:

– The petrol filter– The petrol flow and pressure– The condition of the petrol pump– The cleanness of the tank– The condition of the injectors

Return the fuel system to service condition.

AFTER REPAIR


JSAA3081.0



VDIAG No: 08

DF 110PRESENT

DESTRUCTIVE MISFIREO.B.D. = O.B.D. failure (On Board Diagnostic) 1 O B D = OBD failure present 2 O B D = OBD failure detected during driving

INSTRUCTIONS

ET093 - Misfire on cylinder 1ET094 - Misfire on cylinder 2ET095 - Misfire on cylinder 3ET096 - Misfire on cylinder 4Give information on the nature and location of the failure.

One cylinder is declared faulty -

ET093 or ET 094 or ET095 or ET096

For this reason, the problem is probably due to an item associated with this cylinder only:– problem on the injector– problem on the spark plug– problem on the high-tension lead

Cylinders 1 and 4 or cylinders 2 and 3 declared faulty -

ET093 and ET096 or ET094 and

ET095

For this reason, the problem is probably due to an item associated with this pair of cylinders only:– problem on the high-voltage side of the coil– problem on the control side of the coil.

Four cylinders declared faulty -

ET093 and ET094 and ET095 and

ET096

For this reason, the problem is probably due to an item associated with all the cylinders.– Problem with petrol filter– Problem with petrol pump– Problem with type of petrol.

If this method does not solve the problem, consult diagnostic DF110 Cont'd

AFTER REPAIR


JSAA3081.0

17-51


17-52


VDIAG No: 08

DF 110

(continued)

INSTRUCTIONS

ET093 - Misfire on cylinder 1ET094 - Misfire on cylinder 2ET095 - Misfire on cylinder 3ET096 - Misfire on cylinder 4give information on the nature and location of the failure.

Check the ignition system.Repair if necessary.

Check the engine compressionRepair if necessary.

Check the engine target.Repair if necessary.

If no anomalies are found, there is a problem on the fuel system.It is therefore necessary to check:


Return the fuel system to service condition.

AFTER REPAIR


JSAA3081.0


17-53


VDIAG No: 08

DF 116PRESENT

OPERATING PROBLEM ON FUEL SYSTEMO.B.D. = O.B.D. failure (On Board Diagnostic) 1 O B D = OBD failure detected during driving

INSTRUCTIONS None

Check the following:



AFTER REPAIR

Statuses ET177 and ET178 are useful for checking whether this fault was repaired correctly. However, driving conditions are not monitorable in after-sales conditions.The "Vehicle Features" booklet may nevertheless give a procedure for validating repair of this fault.

JSAA3081.0


17-54


VDIAG No: 08

DF 117PRESENT

IMMOBILISER CODE NOT LEARNT

Consult the immobiliser diagnostics.

AFTER REPAIRDeal with any other possible faults. Erase the fault memory.

JSAA3081.0


17-55


VDIAG No: 08

DF 118PRESENT

ORSTORED

COOLANT PRESSURE SENSOR CIRCUIT DEF = Non-identified electrical failure

INSTRUCTIONS

Conditions for applying diagnostic on stored faults.:

The fault is declared present following a dwell of 10 seconds with the engine running and heating/ventilation engaged. (During the test, the battery voltage should not be lower than 11 volts).


Injection ECU channel J3, connector B Coolant pressure sensor Injection ECU channel H2, connector B Coolant pressure sensor Injection ECU channel H4, connector B Coolant pressure sensor

Return to service condition if necessary

Consult the diagnostic for the heating/ventilation if the incident persists.

AFTER REPAIRFollow the instructions to confirm repair. Process any other faultsErase the fault memory.

JSAA3081.0


17-56


VDIAG No: 08

DF 120PRESENT

O.B.D. INDICATOR LIGHT CIRCUITCO0 = Open circuit or short-circuit to earth CC1 = Short-circuit on +12-volt line DEF = Non-identified electrical failure OBD = OBD failure (On Board Diagnostic)

INSTRUCTIONS None

Connect the breakout connector in place of the ECU; check the insulation, the continuity, and absence of spurious resistance on the connection between:

Computer channel B3, connector A Instrument panel



AFTER REPAIRFollow the instructions to confirm repair. Process any other faults Erase the fault memory.

JSAA3081.0


17-57


VDIAG No: 08

DF 123PRESENT

OR STORED

THROTTLE POTENTIOMETER CIRCUIT CHANNEL 1CO0 = Open circuit or short-circuit to earth CC1 = Short-circuit on +12-volt line

INSTRUCTIONSConditions for applying diagnostic on stored faults:The fault is declared present following variation of the engine speed.

Check the mating and general condition of the connector on the throttle position potentiometer.Change the connector if necessary.

Check the resistance of the trottle position potentiometer channel 1 (the resistance is null or equal to infinity in the event of a straight failure).Replace the throttle potentiometer if necessary.


Computer channel G3, connector B Throttle position potentiometer track 1 Computer channel G2, connector B Throttle position potentiometer track 1 Computer channel G4, connector B Throttle position potentiometer track 1



AFTER REPAIRFollow the instructions to confirm repair.Deal with any other possible faults. Erase the fault memory.

JSAA3081.0


17-58


VDIAG No: 08

DF 124PRESENT

OR STORED

THROTTLE POTENTIOMETER CIRCUIT CHANNEL 2CO0 = Open circuit or short-circuit to earth CC1 = Short-circuit on +12-volt line

INSTRUCTIONSConditions for applying diagnostic on stored faults:The fault is declared present following variation of the engine speed.

Check the mating and general condition of the connector on the throttle position potentiometer.Change the connector if necessary.

Check the resistance of the throttle position potentiometer channel 2 (the resistance is null or equal to infinity in the event of a straight failure).Replace the throttle potentiometer if necessary.


Computer channel D3, connector B Throttle position potentiometer track 2 Computer channel G2, connector B Throttle position potentiometer track 2 Computer channel G4, connector B Throttle position potentiometer track 2



AFTER REPAIRFollow the instructions to confirm repair.Deal with any other possible faults. Erase the fault memory.

JSAA3081.0


17-59


VDIAG No: 08

DF 125PRESENT

OR STORED

PEDAL-POTENTIOMETER CIRCUIT - TRACK 1CO0 = Open circuit or short-circuit to earth CC1 = Short-circuit on +12 Volts

INSTRUCTIONS

Conditions for applying diagnostic on stored fault:The fault is declared present following a variation of the accelerator pedal from no-load to full load.in the event of fault, it is essential to carry out this whole procedure before driving the vehicle.

Check the connector on the pedal potentiometer for proper mating and general condition.Change the connector if necessary.

Check the resistance of pedal potentiometer track 1 (the resistance is null or equal to infinity in the event of a straight failure).Check that the resistor of pedal potentiometer track 1 plots the proper curve, by pressing the pedal from no-load to full load.Check that the pedal is properly actuating potentiometer track 1.Change the pedal potentiometer if necessary.


Computer channel H3, connector A Pedal potentiometer track 1 Computer channel G2, connector A Pedal potentiometer track 1Computer channel H2, connector A Pedal potentiometer track 1



AFTER REPAIRFollow the instructions to confirm repair. Deal with any other possible faults.Erase the fault memory.

JSAA3081.0


17-60


VDIAG No: 08

DF 126PRESENT

OR STORED

PEDAL POTENTIOMETER CIRCUIT TRACK 2CO0 = Open circuit or short-circuit to earthCC1 = Short-circuit on +12-volt line

INSTRUCTIONS

Conditions for applying diagnostic on stored faults:The fault is declared present following a variation of the accelerator pedal from no-load to full load.In the event of a fault, it is essential to run this entire procedure before driving the vehicle.

Check the connector on the pedal potentiometer for proper mating and general condition.Change the connector if necessary.

Check the resistance of pedal potentiometer channel 2 (the resistance is null or equal to infinity in the event of a straight failure).Check that the resistor of the pedal potentiometer track 2 plots the proper curve, by pressing the pedal from no-load to full load.Check that the pedal is properly actuating potentiometer track 2.Change the pedal potentiometer if necessary.


Computer channel F4, connector A Pedal potentiometer track 2 Computer channel F2, connector A Pedal potentiometer track 2 Computer channel F3, connector A Pedal potentiometer track 2



AFTER REPAIRFollow the instructions to confirm repair. Deal with any other possible faults.Erase the fault memory.

JSAA3081.0


17-61


VDIAG No: 08

DF 127PRESENT

ORSTORED

CAN HEATING/VENTILATION CONNECTION

INSTRUCTIONS Switch on the ignition


AFTER REPAIR None

JSAA3081.0


17-62


VDIAG No: 08

DF 128PRESENT

ORSTORED

AUTOMATIC-TRANSMISSION OR ROBOT-BOX CAN CONNECTIONDEF = Non-identified electrical failure OBD = OBD failure (On Board Diagnostic)



AFTER REPAIR None

JSAA3081.0


17-63


VDIAG No: 08

DF 129PRESENT

ORSTORED

PEDAL-POTENTIOMETER CIRCUITDEF = Coherence of pedal-potentiometer tracks

INSTRUCTIONS

Conditions for applying diagnostic on stored faults:The fault is declared present after switching the ignition on without pressing the accelerator pedal for the first 10 seconds.ORThe fault is declared present during smooth variation of the pedal potentiometer from no-load to full-load.ORThe fault is declared present when there is a full load for 10 seconds.

Check the connector on the pedal potentiometer for proper mating and its general condition.Change the connector if necessary.

Check the resistance of the pedal potentiometer (the resistance is null or equal to infinity in the event of a straight failure).Check that the potentiometer resistance follows the proper curve, by pressing the pedal from no-load to full load.Check that the pedal is properly actuating the potentiometers.Change the pedal potentiometer if necessary.


Computer channel H3, connector A Pedal potentiometer Computer channel G2, connector A Pedal potentiometer Computer channel H2, connector A Pedal potentiometer Computer channel F4, connector A Pedal potentiometer Computer channel F2, connector A Pedal potentiometer Computer channel F3, connector A Pedal potentiometer




JSAA3081.0


17-64


VDIAG No: 08

DF 130PRESENT

ORSTORED

GEARBOX RATIO



Consult the diagnostics for the automatic transmission.

AFTER REPAIR None

JSAA3081.0


17-65


VDIAG No: 08

DF 131PRESENT

ORSTORED

AGB TORQUE CONVERTER



Consult the diagnostic for the automatic transmission.

AFTER REPAIR None

JSAA3081.0


17-66


VDIAG No: 08

DF 132PRESENT

ORSTORED

ELECTRIC WINDSCREENDEF = Non-identified electrical failure



AFTER REPAIR None

JSAA3081.0


17-67


VDIAG No: 08

DF 134PRESENT

ORSTORED

INSTRUMENT-PANEL CONNECTIONDEF = Non-identified electrical failure



AFTER REPAIR None

JSAA3081.0


17-68


VDIAG No: 08

DF 135PRESENT

ORSTORED

BRAKE-PEDAL SENSOR CIRCUIT1DEF = Failure of either brake-pedal contact 2DEF = Failure of both brake-pedal contacts

INSTRUCTIONS

It is vital that the ABS is not defective when carrying out this test.

Fault-finding conditions for stored fault:

The fault is declared present following a long press on the brake pedal.

Check the connection and the state of the double-contact switch as well as the connector.Replace if necessary.


Computer channel E4, connector A Brake-pedal switch Computer channel H2, connector B Brake-pedal switch


If the problem is not resolved, process the other faults then go to the conformity check.


JSAA3081.0


17-69


VDIAG No: 08

DF 136PRESENT

ORSTORED

ACCELERATOR PEDAL / MOTORISED CHOKE VALVE CIRCUIT1DEF = Failure on the +5-volt supply 2DEF = Failure on potentiometer supply 1 3DEF = Failure on potentiometer supply 2 DEF = Coherence between the position of the pedal and the position of

the motorised choke valve

INSTRUCTIONSConditions for applying diagnostic on stored faults:The fault is declared present following a variation of the engine speed. In the event of a fault, it is essential to run this entire procedure before driving the vehicle.

Check the mating and condition of the connectors on the pedal potentiometer and motorised choke valve.Change a connector if necessary.

Check the resistance of the throttle potentiometer.Replace the throttle potentiometer if necessary.

Check the motor resistance of the motorised choke valve.Change the motorised choke valve if necessary.

Check the resistance of the pedal potentiometers (the resistance is null or equal to infinity in the event of a straight failure) and of the motorised choke valve.Check that the potentiometer resistance follows the proper curve, by pressing the pedal from no-load to full load.Check that the pedal is correctly driving the potentiometer.Change the pedal potentiometer if necessary.


Computer channel H3, connector A Pedal potentiometer Computer channel G2, connector A Pedal potentiometer Computer channel H2, connector A Pedal potentiometer Computer channel F4, connector A Pedal potentiometer Computer channel F2, connector A Pedal potentiometer Computer channel F3, connector A Pedal potentiometer Computer channel M3, connector B Motorised choke valveComputer channel M4, connector B Motorised choke valve Computer channel G4, connector B Motorised choke-valve potentiometer Computer channel D3, connector B Motorised choke-valve potentiometer Computer channel G2, connector B Motorised choke-valve potentiometer Computer channel G3, connector B Motorised choke-valve potentiometer




JSAA3081.0


17-70


VDIAG No: 08

DF 137PRESENT

ORSTORED

MOTORISED CHOKE VALVEDEF = Non-identified electrical failure1DEF or 4DEF = Slaving fault on the motorised choke valve 2DEF or 4DEF = Fault finding stops of the motorised choke valve 3DEF = General failure of motorised choke valve control6DEF or 7 DEF = Programming

INSTRUCTIONS

Conditions for applying diagnostic on stored faults:The fault is declared present following a variation of the engine speed. Faults DF003 - coolant temperature sensor circuit and DF004 - air temperature sensor circuit take priority. In the event of a fault, it is essential to run this entire procedure before driving the vehicle.

Check the connector on the motorised choke valve for proper mating and its general condition.Change a connector if necessary.


Computer channel M3, connector B Motorised choke valve Computer channel M4, connector B Motorised choke valve Computer channel G4, connector B Motorised choke valve




JSAA3081.0


17-71


VDIAG No: 08

DF 138PRESENT

ORSTORED

NO.1 IMMERSION HEATER RELAY COMMANDDEF = Non-identified electrical failure CO0 = Open circuit or short-circuit to earth CC1 = Short-circuit on +12-volt line

INSTRUCTIONSFaults DF003 - coolant temperature sensor circuit and DF004 - air temperature sensor circuit - take priority.

Check the connector on the No.1 immersion heater relay proper mating and its general condition.

Check the insulation and the continuity of the connection between:Injection ECU channel D2, connector C No.1 immersion heater relay

Check the coil of the No.1 immersion heater relay.Change the relay if necessary.

Check the presence of the + 12 volt after-ignition on channel 1 of the No.1 immersion heater relay.Return the line to service condition up to the fuse if necessary.



JSAA3081.0


17-72


VDIAG No: 08

DF 139PRESENT

ORSTORED

No.2 immersion-heater relay command.DEF = Non-identified electrical failure CO0 = Open circuit or short-circuit to earth CC1 = Short-circuit on +12-volt line

INSTRUCTIONSFaults DF003 - coolant temperature sensor circuit and DF004 - air temperature sensor circuit - take priority.

Check the connector on the No.2 immersion heater relay for proper mating and its general condition.


Injection ECU channel J4, connector B No.2 immersion heater relay

Check the coil of the No.2 immersion heater relay.Change the relay if necessary.

Check the presence of the + 12 volts after-ignition on channel 1 of the No.2 immersion heater relay.Return the line to service condition up to the fuse if necessary.



JSAA3081.0


17-73


VDIAG No: 08

DF 145PRESENT

ORSTORED

TRAJECTORY CONTROLDEF = Non-identified electrical failure.



AFTER REPAIR None

JSAA3081.0


17-74


VDIAG No: 08

DF 168PRESENT

ORSTORED

AIR inlet circuitO.B.D. = O.B.D. failure (On Board Diagnostic) 1 O B D = OBD failure detected during driving

INSTRUCTIONSConditions for application of the fault finding strategy on stored fault: the fault is declared present following a variation of the engine speed. in the event of a fault, it is essential to run this entire procedure before driving the vehicle.




Check the resistance of the pedal potentiometers (the resistance is null or equal to infinity in the event of a straight failure) and of the motorised choke valve.Check that the potentiometer resistance follows the proper curve, by pressing the pedal from no-load to full load.Check that the pedal is correctly driving the potentiometer.Change the pedal potentiometer if necessary.


Computer channel H3, connector A Pedal potentiometer Computer channel G2, connector A Pedal potentiometer Computer channel H2, connector A Pedal potentiometer Computer channel F4, connector A Pedal potentiometer Computer channel F2, connector A Pedal potentiometer Computer channel F3, connector A Pedal potentiometer Computer channel M3, connector B Motorised choke valve Computer channel M4, connector B Motorised choke valve Computer channel G4, connector B Motorised choke-valve potentiometer Computer channel D3, connector B Motorised choke-valve potentiometer Computer channel G2, connector B Motorised choke-valve potentiometerComputer channel G3, connector B Motorised choke-valve potentiometer




JSAA3081.0


17-75


VDIAG No: 08

DF 233PRESENT

ORSTORED

TRAJECTORY CONTROLDEF = Non-identified electrical failure



AFTER REPAIR None

JSAA3081.0


17-76


VDIAG No: 08

DF 235PRESENT

ORSTORED

CRUISE-CONTROL/OVERSPEED GOVERNOR1DEF = Seering-wheel controls 2DEF = Incoherence

INSTRUCTIONS


The fault is declared present following a road test by using the cruise-control then the speed governor function.

1 DEFCheck the mating and general condition of the connector on the steering-wheel regulator/overspeed governor control switches.Change the connector if necessary.


Computer channel D2, connector A Steering-wheel controlComputer channel D3, connector A Steering-wheel control


Check the reliability of the steering-wheel controls.Change a switch if necessary.

2 DEFCheck for proper mating and general condition of the connector on the steering-wheel control switch for the regulator/overspeed governor.Change the connector if necessary.


Computer channel A2, connector A

Computer channel C3, connector A

Regulator/overspeed governor ON/OFF switchRegulator/overspeed governor ON/OFF switch


Check the reliability of the regulator/overspeed governor ON/OFF switch.Change the switch if necessary.


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INJECTIONFault finding - Conformity check 17


VDIAG No: 08 Fault finding - Conformity check

INSTRUCTIONS

The values shown in this conformity test are only given as an indication. It is therefore essential to consult the corresponding chapter of this Repair Manual.

Conditions for performance: Engine stopped, ignition on.

Order FunctionParameter or state

Check or ActionDisplay and

notesFault finding

State / Parameter window

1 Battery voltage

ET 001: + After-contact computer ACTIVEIn the event of

problemsconsult diagnostic

PR004

PR004: Computer supply voltage 11.8 < X < 13.2 V

2 Coolant

temperature sensor

PR002: Coolant temperatureX = Engine temperature

± 5 °C

In the event of problems

consult diagnostic PR002

3 Air

temperature sensor

PR003: Air temperatureX = Temperature

under bonnet ± 5 °C



4 Pressure sensor

PR016: Atmospheric pressure X =Atmospheric pressure


consult diagnostic PR001PR001: Manifold pressure X =Atmospheric

pressure

5Accelerator

pedal

No-load accelerator pedal



ET 129: Accelerator pedal position: No-load

ACTIVE

ET 128: Accelerator pedal position: Full load

INACTIVE

PR112: Measured pedal position ≅ 75˚

PR120: Pedal no-load programming ≅ 75˚

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17-78


VDIAG No: 08

INSTRUCTIONS



Order Function Parameter or stateCheck or Action

Display and notes

Fault finding

6 Cont'd

Accelerator pedal

Accelerator pedal slightly pressed



ET 129:

ET 128:

Accelerator pedal position: No-load

Accelerator pedal position: full load

INACTIVE

INACTIVE

Accelerator pedal pressed



ET 129:

ET 128:

PR112:

Accelerator pedal position: No-load

Accelerator pedal position: Full load

Measured pedal position

INACTIVE

ACTIVE

≅ 88˚

7 Motorised

choke valve

Accelerator pedal releasedIn the event of

problems a fault is declared by the diagnostic tool.


turn off the ignition and wait for the

dialogue to stop.Switch on the

ignition.



ET 118:

ET 111:

ET 130:

PR113:

PR017:

PR110:

PR111:

PR119:

Motorised choke valve in degraded mode

Programming choke-valve stops

Motorised choke valve: closed

Reference position of motorised choke valve

Measured valve position

Measured valve position - track 1


Motorised choke valve lower stop

INACTIVE

ACTIVE

ACTIVE

≅ 14˚

≅ 74˚

≅ 74˚

≅ 74˚

9˚

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VDIAG No: 08

INSTRUCTIONS



Order Function Parameter or stateCheck or Action

Display and notes

Fault finding

7Cont'd

Motorised choke valve

Accelerator pedal pressed In the event of problems, a fault is

declared by the diagnostic tool.

ET 118: Motorised choke valve in degraded mode

INACTIVE

ET 131:

PR113:

PR017:

PR110:

PR111:

PR118:

Motorised choke valve: open

Reference position of motorised choke valve.

Measured valve position



Motorised choke valve upper stop.

ACTIVE

≅ 89˚

≅ 89˚

≅ 89˚

≅ 89˚

≅ 92˚


consult diagnosticPR017

8 Brake pedal

Brake pedal released In the event of problems

consult diagnosticET110ET143

ET 110:

ET 143:

Brake pedal

Redundant brake pedal

INACTIVE

INACTIVE

Brake pedal pressed In the event of problems

consult diagnosticET110ET143

ET 110:

ET 143:

Brake pedal

Redundant brake pedal

ACTIVE

ACTIVE

9 Clutch pedal

Clutch pedal released In the event of problems

consult diagnosticET182

ET 182: Clutch pedal switch INACTIVE

Clutch pedal pressed In the event of problems

consult diagnosticET182

ET 182: Clutch pedal switch ACTIVE

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VDIAG No: 08

INSTRUCTIONS


Conditions for performance: Engine stopped, ignition on

Order FunctionParameter or stateCheck or Action

Display and notes Fault finding

10

Cruise-control/

overspeed governor

Overspeed-governor ON/OFF switch pressed

In the event of problems consult

diagnostic ET192

ET 192: Cruise-control/overspeed governor function

STATE1: Overspeed-governor ON/OFF switch pressed

Cruise-control ON/OFF switch pressed


diagnostic ET192


STATE2: Cruise-control ON/OFF switch pressed

Overspeed-governor ON/OFF switch pressed and + switch on steering-wheel control pressed


diagnostic ET192


STATE3: Incrementation switch pressed

Overspeed-governor ON/OFF switch pressed and Suspend switch on steering-wheel control pressed


diagnostic ET192


STATE4: Decrementation switchpressed

Overspeed-governor ON/OFF switch pressed and Suspend switch on steering-wheel control pressed


diagnostic ET192


STATE5: Suspend switch pressed

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VDIAG No: 08

INSTRUCTIONS





10(Contin-

ued)

Cruise-control/

overspeed governor (cont'd)

Overspeed-governor ON/OFF switch pressed and Restart switch on steering-wheel control pressed In the event of

problems consult

diagnostic ET192


STATE6: Restart switch pressed

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VDIAG No: 08

INSTRUCTIONS





notesFault finding

Command Window

11 Fuel pump

AC010: Fuel pump relay Fuel pump should be heard to

operate


consult diagnosticAC010

12 Cooling fan assembly

AC271: Low speed fan assembly relay

The fan should be heared running at

low speed



AC272: High speed fan assembly relay

The fan should be heared running at

high speed



13Canister-bleed solenoid valve

AC016: Canister-bleed solenoid valve

The canister-bleed solenoid valve should

operate



14Motorised

choke valve

AC612: Motorised choke valve The motorised choke valve

should be heared ooperating



15Camshaft

shifter

AC595: Camshaft shifter 1 The camshaft shifter should be

heared



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VDIAG No: 08

INSTRUCTIONS


Conditions for performance: Engine warm at idle speed, no electrical consumers.



notesFault finding


1 Battery voltage

ET 001: + After ignition ACTIVE In the event of problems


PR004: Computer supply voltage

13 < X < 14.5 V

2 Flywheel

signalET060: Flywheel signal with

engine runningACTIVE In the event of


ET060

6Idle speed regulation

ET 039: Idle speed regulation ACTIVE


consult diagnostic ET039

PR006: Engine speed 725 < X < 775 rpm

PR041: Idle speed instruction 725 < X < 775 rpm

PR055: After Sales idle speed instruction

on request

PR040: Idle speed divergence -25< X <+25 rpm

PR022: Idling cyclic opening ratio

9 % < X < 15%

PR021: Adaptive idling cyclic opening ratio

-6 % < X < 6%

7 Pressure sensor

PR016: Atmospheric pressure X =Atmospheric pressure


consult diagnostic PR016PR001: Manifold pressure 280 < X < 360 mb

8Anti-pinking

circuit

PR013: Average pinking signal ≅ 30˚ In the event of problems


PR015: Anti-pinking correction X ≤ 5

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VDIAG No: 08

INSTRUCTIONS


Conditions for performance: Engine warm at idle speed, no electrical consumers.



notesFault finding

9Richness-ratio

regulation

ET 037: Richness-ratio regulation ACTIVEIn the event of


ET037

PR009: Upstream sensor voltage 20 < X < 800 mV

PR035: Richness-ratio correction value

0 < X < 255

10 Power assisted

steering pressostat

Turn wheels to full lock

ET034ET 034: Power assisted steering

pressostatACTIVE

11 Cooling fan assembly

PR002: Coolant temperature The fan should operate when the

coolant temperature

exceeds 99°C


consult diagnostic

ET 035: Low-speed fan ACTIVE ET035

PR002: Coolant temperature The fan should operate when the

coolant temperature

exceeds 102°C

ET 036: High speed fan ACTIVE ET036

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VDIAG No: 08

INSTRUCTIONS


Conditions for performance: Road test.



notesFault finding


1 Pinking sensor

Vehicle under load. In the event of problems

consult diagnosticPR013

PR013: Average pinking signal ≅ 30˚

PR015: Anti-pinking correction X ≤ 5

2 Adaptive richness

Programming

In the event of problems, see PR30

PR030: Operating adaptive richness 96 < X < 192

PR031: Idle adaptive richness 32 < X < 224

3 Pollutant

emissions

2500 rpm after driving. CO < 0.3 % CO2 > 13.5 %

O2 < 0,8 % HC < 100 ppm 0,97 < 1 < 1.03

In the event of problems, consult the Antipollution Technical Note

With the engine at idling speed, wait for stabilisation.

CO < 0.5 % HC < 100 ppm 0,97 < 1 < 1.03

JSAA3081.0

INJECTIONDiagnostics - Status Interpretation 17


VDIAG No: 08 Diagnostics - Status Interpretation

ET034

POWER-ASSISTED STEERING PRESSOSTAT of

NOTES There must be no faults present or stored.

Check the reliability of the power-assisted steering (oil level etc.).Check for reliable connection of the power-assisted steering pressostat.Check the insulation and continuity of the connection between:

Computer channel C4, connector B PAS pressostatPAS pressostat Earth


If all these points are correct, replace the power assisted steering pressure switch.


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17-87


VDIAG No: 08

ET035

LOW SPEED FAN



– supply of fan relay and fan,– health of fan earth,– condition of fan relay,– condition of fan resistor,– fan status.



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VDIAG No: 08

ET036

HIGH SPEED FAN



– supply of fan relay and fan,– health of fan earth,– condition of fan relay,– fan condition.



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VDIAG No: 08

ET037

RICHNESS REGULATION


Check the mating and condition of the downstream oxygen probe connector.Repair if necessary.

Check the presence of the +12V on the upstream oxygen probe.Check the Insulation and the continuity of the connection between:

Computer channel C1. connector C Upstream oxygen probe Computer channel B1. connector C Upstream oxygen probe Computer channel G1. connector C Upstream oxygen probe


Check ignition.Check the sealing of the canister bleed valve (a leak can disrupt the richness considerably).Check the exhaust system seal.Check the sealing of the inlet manifold.If the vehicle has only been driven in town, the sensor is contaminated (try driving under load).Check the fuel pressure.If idling is irregular, check the valve clearances and the timing.If necessary change the oxygen probe.


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VDIAG No: 08

ET039

IDLE SPEED REGULATION

NOTESThere must be no faults present or stored.

Caution with value of engine speed idling reference in After-Sales context: PR055




Check the resistance of the pedal potentiometers (the resistance is null or equal to infinity in the event of a straight failure) and motorised choke valveCheck that the potentiometer resistance follows the proper curve, by pressing the pedal from no-load to full load.Check that the pedal is correctly driving the potentiometer.Change the pedal potentiometer if necessary.


Computer channel H3, connector A Pedal potentiometer Computer channel G2, connector A Pedal potentiometer Computer channel H2, connector A Pedal potentiometerComputer channel F4, connector A Pedal potentiometer Computer channel F2, connector A Pedal potentiometer Computer channel F3, connector A Pedal potentiometer Computer channel M3, connector B Motorised choke valve Computer channel M4, connector B Motorised choke valve Computer channel G4, connector B Motorised choke-valve potentiometer Computer channel D3, connector B Motorised choke-valve potentiometer Computer channel G2, connector B Motorised choke-valve potentiometer Computer channel G3, connector B Motorised choke-valve potentiometer

Repair.


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VDIAG No: 08

ET039

(continued)

NOTES

There must be no faults present or stored.

CAUTION with the value of the engine idling speed reference in After-Sales context: PR055

Idle speed divergence

Min. stop

NOTES Idling speed is too slow.

– Check the operation of the ratio regulation.– Clean the air supply circuit (throttle body, idle speed regulation stepper motor), since it is probably

contaminated.– Check the engine oil level (too high --> splashing).– Check the engine compression– Check the valve clearances and the timing.– Check ignition.– Check the injectors

Idle speed divergence

Min. stop NOTES Idling speed is too high.

– Check the engine oil level.– Check that the pressure sensor is operating correctly.– Check the cleanness of the pipes on the manifold.– Check the pneumatically controlled solenoid valves.– Check the manifold gaskets.– Check the throttle body gaskets.– Check the brake servo sealing.– Check the restrictions are present in the oil vapour rebreathing circuit.– Check the valve clearances and the timing.


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VDIAG No: 08

ET060

FLYWHEEL SIGNAL WITH ENGINE RUNNING


Check the mating and condition of the target sensor connector.Change the connector if necessary.

Check the resistance of the target sensor.Replace the sensor if necessary.


Computer channel E4, connector B Target sensorComputer channel F3, connector B Target sensor


Check the state of the engine indicator light.


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VDIAG No: 08

ET110

BRAKE PEDAL


Check the presence of the earth on the brake pedal sensor.Repair if necessary.


Computer channel E4, connector A Brake pedal


Check the operation of the brake pedal sensor.Change the pedal sensor if necessary.


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VDIAG No: 08

ET143

REDUNDANT BRAKE PEDAL

NOTESThere must be no faults present or stored.Switch on the ignition.



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VDIAG No: 08

ET182

CLUTCH PEDAL SWITCH

NOTESThere must be no faults present or stored.Switch on the ignition.



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VDIAG No: 08

ET192

CRUISE-CONTROL/OVERSPEED GOVERNOR FUNCTION


STATE1STATE2

Check the connector on the steering-wheel control switch for the regulator/overspeed governor for proper mating and general condition.Change the connector if necessary.


Computer channel A2, connector A Cruise-control/overspeed governor ON/OFF switch

Computer channel C3, connector A Cruise-control/overspeed governor ON/OFF switch


Check the reliability of the cruise-control/overspeed governor ON/OFF switch.Change the switch if necessary.

STATE3ETAT4ETAT5ETAT6

Check the connector on the steering-wheel control switches for the cruise-control/overspeed governor for proper mating and general condition.Change the connector if necessary.


Computer channel D2, connector A Steering-wheel controlComputer channel D3, connector A Steering-wheel control


Check the reliability of the steering-wheel controls.Change a switch if necessary.


JSAA3081.0

INJECTIONDiagnostics - Interpretation of parameters 17


VDIAG No: 08 Diagnostics - Interpretation of parameters

PR001

MANIFOLD PRESSURE


Check that the pressure sensor is connected pneumatically


Computer channel H2, connector B Pressure sensorComputer channel H3, connector B Pressure sensorComputer channel H4, connector B Pressure sensor


Use a vacuum pump to check the coherence of the manifold pressure: PR001Replace the sensor if necessary.

If PR001 > Maximum at idling speed:Check the valve clearance.Check that the purge canister is closed at idling speed.Check the cylinder compressions.Repair.


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17-98



PR002

COOLANT TEMPERATURE


If the reading is incoherent, ensure that the sensor is obeying the "resistance versus temperature" calibration curve: Change the sensor if there is any drift (NOTE: a drifting sensor is often the result of an electrical shock).


Computer channel F2, connector B Coolant temperature sensor Computer channel F4, connector B Coolant temperature sensor



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PR003

AIR TEMPERATURE


If the reading is incoherent, ensure that the sensor is obeying the "resistance versus temperature" calibration curve: Change the sensor if there is any drift (NOTE: a drifting sensor is often the result of an electrical shock.).


Computer channel E3, connector B Air temperature sensor Computer channel E2, connector B Air temperature sensor



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PR004

COMPUTER SUPPLY VOLTAGE

NOTESThere must be no faults present or stored.

No electrical users.

Ignition on

If voltage < Min., the battery is discharged:Check the charging circuit to determine the cause of this fault.

If voltage >Max., the battery may be over-charged:Check that the charging voltage is correct with and without electrical users.

At idle speed

If voltage < Minimum, the charging voltage is too low:Check the charging circuit to determine the cause of this fault.

If voltage > Max., the charging voltage is too high:The alternator regulator is faulty. Repair this fault and check the electrolyte level in the battery.


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PR013

PINKING SIGNAL


The pinking sensor should give a signal which is not zero, to prove that it is recording the mechanical vibrations of the engine.If the signal is zero:– Check that the sensor is securely attached.– Check the insulation and continuity of the wiring:

Computer channel A2, connector B Pinking sensor Computer channel B2, connector B Pinking sensor Computer channel C2, connector B Pinking sensor screening

If necessary change the sensor.


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PR017

MEASURED THROTTLE POSITION



Check the resistance of them motorised choke-valve potentiometerReplace the throttle potentiometer if necessary.


Check the resistance of the pedal potentiometers (the resistance is null or equal to infinity in the event of a straight failure) and motorised choke valve.Check that the potentiometer resistance follows the proper curve, by pressing the pedal from no-load to full load.Check that the pedal is correctly driving the potentiometer.Change the pedal potentiometer if necessary.


Computer channel H3, connector A Pedal potentiometer Computer channel G2, connector A Pedal potentiometer Computer channel H2, connector A Pedal potentiometer Computer channel F4, connector A Pedal potentiometer Computer channel F2, connector A Pedal potentiometer Computer channel F3, connector A Pedal potentiometer Computer channel M3, connector B Motorised choke valve Computer channel M4, connector B Motorised choke valve Computer channel G4, connector B Motorised choke-valve potentiometer Computer channel D3, connector B Motorised choke-valve potentiometer Computer channel G2, connector B Motorised choke-valve potentiometer Computer channel G3, connector B Motorised choke-valve potentiometer

Repair.


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PR030

ADAPTATIVE RICHNESS -

NOTESThere must be no faults present or stored.If the PR030 or PR031 is near the Min. stop, there is too much petrolIf the PR030 or PR031 is near the max. stop, there is insufficient petrol

Ensure the canister bleed valve is sealed.

Ensure the health, cleanness and correct operation of:Air filterFuel filterFuel pumpPetrol circuitTank.


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PR112

MEASURED ACCELERATOR PEDAL POSITION


Check that nothing will impede operation of the accelerator pedal.Return to service condition if necessary

Check the resistance of the pedal potentiometer (the resistance is null or equal to infinity in the event of a straight failure).Check that the potentiometer resistance follows the proper curve, by pressing the pedal from no-load to full load.Check that the pedal is properly actuating the potentiometers.Change the pedal potentiometer if necessary.


Computer channel H3, connector A Pedal potentiometer Computer channel G2, connector A Pedal potentiometer Computer channel H2, connector A Pedal potentiometer Computer channel F4, connector A Pedal potentiometer Computer channel F2, connector A Pedal potentiometer Computer channel F3, connector A Pedal potentiometer

Return to service condition


JSAA3081.0

INJECTIONDiagnostics - Interpretation of commands 17


VDIAG No: 08 Diagnostics - Interpretation of commands

AC010

FUEL PUMP RELAY


Check the petrol pump connector for proper mating and general condition.Change the connector if necessary.

During commanding of the fuel-pump relay, check for presence of the + 12 V on channel C1 of the fuel pump connector.Repair if necessary.

Check for presence of the earth on channel C2 of the fuel pump connector.Repair if necessary.

Test the reliability of the petrol pump


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17-106


VDIAG No: 08

AC016

CANISTER-BLEED SOLENOID VALVE


Check the connection and the state of the canister bleed connector.Change the connector if necessary.

With the ignition on, check for the presence of +12 V on the canister bleed valve.Repair if necessary.

Check the resistance of the canister bleed valve.Replace the valve if necessary.


Computer channel E1. connector C Canister bleed valve


Change the canister bleed valve if necessary.


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VDIAG No: 08

AC271

LOW-SPEED FAN RELAY

INSTRUCTIONS There must be no faults present or stored.


– supply of fan relay and fan,– health of fan earth,– condition of fan relay,– condition of fan resistor,– fan condition.



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VDIAG No: 08

AC272

HIGH-SPEED FAN RELAY



– supply of fan relay and fan,– health of fan earth,– condition of fan relay,– fan condition.



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VDIAG No: 08

AC595

SHIFTER de ARBRE A CAMES 1


Check the connector on the camshaft-shifter solenoid valve for proper mating and general condition.Change the connector if necessary.

With the ignition on, check for the presence of 12 V on the camshaft-shifter solenoid valveRepair if necessary.

Check the resistance of the camshaft-shifter solenoid valve.Change the solenoid valve if necessary.


Computer channel E2, connector C Camshaft-shifter solenoid valve



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VDIAG No: 08 Diagnostics - Interpretation of commands

AC612

MOTORISED CHOKE VALVE


Check the mating and condition of the connectors on the motorised choke-valve potentiometer.Change a connector if necessary.



Computer channel M3, connector B Motorised choke valve Computer channel M4, connector B Motorised choke valve Computer channel G4, connector B Motorised choke-valve potentiometer Computer channel D3, connector B Motorised choke-valve potentiometerComputer channel G2, connector B Motorised choke-valve potentiometer Computer channel G3, connector B Motorised choke-valve potentiometer



JSAA3081.0

INJECTIONFault finding - Help 17


VDIAG No: 08 Fault finding - Help

For further details, refer to section 12

Injector resistance = 1.78 Ω

Idle regulation stepper motor resistance = 53 Ω

Canister bleed valve resistance = 26 Ω

Ignition coil resistance: PrimarySecondary

= 0.5 Ω= 11 KΩ

OXYGEN PROBE heater resistance UpstreamDownstream

= 9 Ω= 3.4 Ω

Throttle potentiometer resistance TrackCursor

= 1300 Ω= 1050 Ω

Flywheel signal resistance = 220 Ω

Fuel pressure sensor = 3.8 Ω

Fuel pressure regulator = 2084 Ω

Manifold pressure sensor = 50 KΩ

Value for: COHCOC2

Lambda

= 0.5% max= 100ppm max= 14.5 % mini= 0,97 <λ< 1.03

Temperature in °C -10 25 50 80 110

Air temperature sensorResistance in ohms

10450 to 8585 2120 to 1880 860 to 760 - -

Coolant temperature sensorResistance in ohms

- 2360 to 2140 850 to 770 290 to 275 117 to 112

17-111

INJECTIONDiagnostics - Customer complaints 17


VDIAG No: 08 Diagnostics - Customer complaints

NOTESCustomer Complaints should only be investigated after a complete check has been run using the diagnostic tool.

NO COMMUNICATION WITH the computer CHART 1

STARTING FAULTS CHART 2

IDLE SPEED FAULTS CHART 3

PROBLEMS WHEN DRIVING CHART 4

AFTER REPAIR Test using the diagnostic tool.

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INJECTIONDiagnostics - Fault-finding chart 17

17-113


VDIAG No: 08 Diagnostics - Fault-finding chart

Chart 1 NO COMMUNICATION WITH THE COMPUTER

NOTES None

Try the diagnostic tool on another vehicle.

Check:

– The connection between the diagnostic tool and the diagnostic socket (cable condition),– injection, engine and passenger-compartment fuses.


Check the presence on the computer of the + 12 V on channel A4, connector B.Check the presence on the computer of the earth on channel H1 connector C, and channels H4 and G4 connector A.



Injection ECU channel H1 connector C Earth Injection ECU channel H4 connector A Earth Injection ECU channel G4 connector A Earth Injection ECU channel B4 connector A Diagnostic socket Injection ECU channel A3 connector A Diagnostic socket Injection ECU channel A4 connector A Diagnostic socket Injection ECU channel K3 connector B Diagnostic socketInjection ECU channel K4 connector B Diagnostic socket Injection ECU channel A4 connector B Fuse



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Chart 2 STARTING FAULTS

NOTESThis Customer Complaint should only be investigated after a complete check has been run using the diagnostic tool.

Check the reliability of the starter motor.

Check there is fuel present (fuel gauge faulty).Check that the fuel is of the proper type.

Check no hoses are pinched (especially after a removal operation).Check the condition of the fuel filter.Check the condition of the tank.Check that the tank vent is not blocked.

Check the fuel pump supply.Check that the impact sensor is operating correctly.

Check the idle speed regulation valve.Tap gently to release the valve.

Disconnect the pipe connecting the canister-bleed solenoid valve to the inlet manifold.Plug the pipe to prevent an air leak.If there is no other effect, the canister bleed is faulty.

Check condition of spark plugs and ignition coils.Check that these elements are well adapted to the vehicle.

Check that the exhaust system is not blocked nor the catalytic converter clogged.

Check the engine compression.

Check the condition of the flywheel.

Set the timing.


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Chart 3 IDLE SPEED FAULTS




Check the idle speed regulation valve.Tap gently to release the valve.


Check the condition of the plugs and coils.Check that these elements are well adapted to the vehicle.


Check on dipstick that oil level is not too high

Check the brake servo is not leaking (noise).

Check the condition of the inlet manifold gaskets.

Check that throttle valve unit is not clogged.

Check the engine compression

Check the condition of the flywheel.

Set the timing.


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Chart 4 PROBLEMS WHEN DRIVING


Check that the air filter is not distorted.




Check the condition of the plugs and coils.Check that these elements are well adapted to the vehicle.


Check the exhaust manifold is not leaking.

Check on dipstick that oil level is not too high

Check the condition of the inlet manifold gaskets.

Check that throttle valve unit is not fouled.

Check the brake servo is not leaking (noise).

Check the flywheel.

Check that calipers, drums and bearings are not seized.Check that the tyres are not under-inflated.

Check the engine compression

Ensure that the cooling function is satisfactory.


JSAA3081.0

INJECTION

TYPE COMPUTER: MOTRONIC ME 7.4.6No. PROGRAMME: 12

VDIAG No: 04

FAULT FINDING

CONTENTS

Page

Preamble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Interpretation of faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Checking conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

Interpretation of commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214

Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

Customer complaints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

Fault-finding chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220


17-119

MOTRONIC ME 7.4.6No. PROGRAMME: 12

VDIAG No: 04

117INJECTIONFault finding - Introduction

GENERAL APPROACH TO FAULT FINDING

– Use one of the diagnostic tools to identify the system fitted on the vehicle (reading of computer family, the N˚ programme No. and Vdiag etc.).

The identification is obtained by reading the following in the command window:

This document introduces the special diagnostic procedures to be applied on all "ME 7.4.6" computers installed on the Laguna.

To run diagnostics of this system it is therefore essential to have the following items:

– the wiring diagram for the operation of the vehicle concerned,– the tools listed under the heading "Special tooling required".

COMPUTER PART NUMBER

VDIAG NUMBER

PROGRAMME NUMBER

ME 7.4.6

04

12


– Implementing of information supplied in the Preamble chapters.

DESCRIPTION OF THE FAULT-FINDING PHASES

1 - FAULT-CHECKING

This phase is the essential starting point for any operation on the vehicle.

Priority of operations

Electrical faults must be processed before OBD electrical faults (DF111, DF112, DF113, DF114, DF185, DF186 misfiring on cylinders 1 to 6; DF183, DF184 catalytic converter No.1 and No.2; DF202, DF203 fuel supply, row A and row B; DF204 and DF205 ageing of upstream sensor, row A and row B).

Note that ther must be no electrical failures -either present or stored - before processing OBD operational faults.

Other priorities are processed in the diagnostics for the fault in question, in the "CONSIGNE" part.

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MOTRONIC ME 7.4.6PROGRAMME No.: 12

VDIAG No.: 04

NOTE: Each fault is interpreted for a particular type of storage (fault present, fault stored, fault present or stored). The checks defined for handling each fault are therefore only to be performed if the fault stated by the fault finding tool is interpreted in the document for its type of storage. The type of storage should be consider when setting up the diagnostic tool after the ignition has been switched off and back on again.

If a fault is interpreted when it is stated to be "stored", the conditions for application of the fault finding appear in the "NOTES" box. When the conditions are not satisfied, use the fault finding to check the circuit of the faulty part since the fault is no longer present on the vehicle.

Perform the same operation when a fault is stated as "stored" by the fault finding tool but is only interpreted in the documentation for a "present" fault.

2 - CHECKING CONFORMITY

The conformity test is designed to check the statuses and parameters which do not display any faults on the diagnostic tool when they are outside the permitted tolerance values. This phase allows:

– diagnosing non-displayable failures corresponding to customer complaints.

– checking the reliability of the injection and ensuring that a fault will not reappear after repair.

In this chapter there is a diagnostic test of the status and parameters in the conditions of their test.

If a status is not operating normally or a parameter is outside permitted tolerance values, you should consult the corresponding diagnostic page.

3 - DIAGNOSTIC-TOOL RESULT CORRECT

If the diagnostic tool test is correct, but the customer complaint is still present, the problem should be dealt with by customer complaint.

Treatment of customer complaints

This section contains fault charts, which suggest the possible causes for the problem. This troubleshooting approach should only be used in the following cases:

– No fault observed on diagnostic tool.

– No anomaly detected during conformity check.

– The vehicle does not operate correctly.

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VDIAG No.: 04

Special features of the ME7.4.6 injection system:

1. Motorised choke valve unit

1.1 GeneralGiven that the motorised choke valve system contains no ajustments between acquisition of the real value with the potentiometers, and the mechanical position of the throttle valve, an equivalance has to be inserted in the ME7.4.6 computer.During this operation, the position of the lower mechanical stop and the limp home position (= operation of backup air) on the throttle valve are programmed, and the potentiometer amplifier is balanced. The programmed values are stored in permanent RAM or EEPROM. The stop programming sequence + storage of the "learnt" values equates to initialisingof the motorised choke-valve unit.The springs in the motorised choke valve are also tested.The above initialisation process runs automatically and autonomously when the ignition is switched ignition, but only under certain input conditions. It may run several times when the ignition is on.

1.2 Throttle-valve programming procedureProgramming should be performed at least once correctly during the vehicle life cycle, that is, when switching on for the first time (original initialisation), then each time either the computer or the motorised choke valve are changed.

NOTE:A fault occurs and the backup position is commanded:– If the automatic programming procedure (step 1 above) is interrupted before the five seconds is up, and if step 4 is

not observed,– If step 4 is not observed

IMPORTANT: A computer is paired to the engine and the vehicle on which it installed. Therefore do not try a computer on another vehicle then return it to the original vehicle.

1 Switch on the ignition and wait at least 5 seconds without starting the engine: the throttle valve matching is initialised automatically.

2 Switch off the ignition.3 Wait before switching the ignition back on, to allow the computer time to store the programmed values:

– at least 10 seconds if the engine is cold (coolant temperature lower than 85˚C),– at least 130 seconds if the engine is warm (coolant temperature 90˚C or above),

4 Switch on the ignition, start the engine and allow it to run at idling speed for one minute to stabilise the air leak rate through the motorised choke valve.

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VDIAG No.: 04

1.3 Programming of the limp-home position The backup limp-home position is necessary for the throttle valve position regulator and to identify the need for alignment when changing the motorised choke valve.When the ignition is turned on, before the throttle valve receives its power, the limp-home position is read on the two potentiometers and a plausibility calculation is carried out using values stored in the computer memory. If the values are different, the need for alignment and programming of the limp-home position is noted.

1.4 Testing the springs of the motorised choke valve (automatic)

1.4.1 Testing the return springsl

Opening the throttle valve up from the limp-home position, then cutting the power stage of the motorised choke valve allows checking the return force applied by the return springs. in the event of a fault, the limp-home position of the throttle valve is commanded.

The test only occurs if all of the following conditions are met: no irreversible interruption in fuel delivery motorised choke valve supplied no reaction to a dependability-type fault regulation of throttle position valve active battery voltage sufficient (between 11 and 15V) vehicle stopped engine speed 250 rpm or less coolant temperature greater than 6˚C air temperature greater than 6˚C

1.4.2 Testing spring openingBy closing the throttle valve down from the limp-home position then cutting the power stage of the motorised choke valve, forced return to the limp-home position due to opening of the spring can be checked. In the event of a fault, the limp-home position is commanded.The test is only performed if all the conditions in paragraph 1.4.1 are met.

2. Management of indicator-light operation

– The injection-fault alert light (amber indicator light, criticality 1) indicates a fault on the motorised choke valve or the accelerator pedal sensor, requiring repairs.

– The "severe injection fault" warning light (red lamp, criticality 2) indicates that the injection system has detected a serious problem that will obligatorily require repairs. Illumination of this indicator light is followed by resetting of the computer.

– The coolant-temperature overheat indicator light illuminates above 118˚C.

INJ.ME7.4.6-1.0


– The OBD warning light (amber indicator light representing an engine) indicates that the pollution threshold is being exceeded.

Each time ignition is switched on, the OBD warning light illuminates to give a visual check. The light extinguishes three seconds after starting of the engine.In normal operation, if the indicator light illuminates steady, the injection system is exceeding the pollution threshold due to misfiring, a fault on the oxygen probes or a fault on the fuel supply. Flashing of this indicator light signifies a risk of catalytic converter damage.

3. Driving conditions for OBD test

The following diagram shows the driving conditions necessary for bringing up faults: "DF205 and DF204 ageing of the sensors upstream row A and row B.Since it would be difficult to reproduce the requisite driving conditions in town, it is recommended to use the diagnostic approach for these faults, even if they are only stored.

Vehicle speed

Time2.50'

90 kph

80 kph

SHORT CYCLE fin of chaîne

-10 kph

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VDIAG No.: 04

INJ.ME7.4.6-1.0



VDIAG No.: 04 Diagnostics - Fault Interpretation

DF 003PRESENT

AIR TEMPERATURE SENSOR CIRCUITCO.1 : OPEN CIRCUIT OR SHORT-CIRCUIT ON + 12 V CC.0 : SHORT-CIRCUIT TO EARTH

NOTES None

Check mating and condition of the air temperature sensor connector.Change the connector if necessary.

Ensure that the sensor is correctly inserted in the inlet manifold.Reposition it if necessary.

Connect the breakout connector in place of the ECU and check the insulation, the continuity, and absence of spurious resistance of the following connections:

ECU (connector A) channel C4 channel 1 of the air temperature sensor ECU (connector A) channel D4 channel 2 of the air temperature sensor


Check the value of the sensor resistance by measuring across:channel 1 and channel 2 of the air temperature sensor; replace the sensor if the resistance is not in the region of: 2051 Ω ± 6 % at 25˚C.(for greater precision, consult ithe electrical caracteristics of the sensor in the Repair Method, according to the temperature).

Ensure the presence of a 5-volt supply on channel 2 of the sensor.If no supply, change the injection ECU.

If the incident persists, change the air temperature sensor.

AFTER REPAIRErase the fault memory.Deal with any other faults as necessary.

INJ.ME7.4.6-1.0

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VDIAG No.: 04

DF 004PRESENT

ORSTORED

COOLANT TEMPERATURE SENSOR CIRCUITCO : CIRCUIT OPEN CC.0 : SHORT-CIRCUIT TO EARTH CO.1 : OPEN CIRCUIT OR SHORT-CIRCUIT ON+ 12 V 1 DEF : SIGNAL INCOHERENCE

NOTES None

COCC.0CC.1

NOTESRun this diagnostic only in the case of a fault present with CO, CC.0 or CO.1.

Check mating and condition of the coolant temperature sensor connector.Change the connector if necessary.


ECU (connector A) channel D3 channel 1 of the air temperature sensor ECU (connector A) channel D2 channel 2 of the air temperature sensor


Check the resistance value of the sensor by measuring between:channel 1 and channel 2 of the coolant temperature sensor; replace the sensor if the resistance is not in the region of: 5000 Ω ± 3 % at 25˚C.(for greater precision, consult the electrical caracteristics of the sensor in the Repair Method, according to the temperature).


If the incident persists, change the coolant temperature sensor.


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VDIAG No.: 04

DF 004

(continued)

1 DEF NOTESConditions for applying diagnostic on stored fault.The fault is declared present following starting of the engine (engine cold) then warming-up to 60˚C.

Ensure the conformity of the engine cooling circuit: radiator in good condition, uninterrupted cooling-air flow (radiator not blocked with leaves etc.), coolant system properly bled etc.

Monitor the coolant temperature on the diagnostic tool (PR002).After starting with a cold engine, the temperature at idling speed should increase steadily without dropping. If the temperature rise is not linear (sharp increase or reduction in the temperature curve), change the coolant temperature sensor.

If the incident persists, change the coolant temperature sensor.

AFTER REPAIRFollow the instructions to confirm repair.Erase the fault memory.Deal with any other faults as necessary.

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VDIAG No.: 04

DF 008PRESENT

ORSTORED

FUEL PUMP RELAY CONTROL CIRCUIT CO : CIRCUIT OPEN CC.0 : SHORT-CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V

NOTES

Processing priority in event of stacked faults:– In priority process fault "DF157 battery voltage" if it is present or stored

Conditions for applying diagnostic on stored fault.The fault is declared present following engine-starting or issuing of the command "AC010 fuel-pump relay".

Special notes:On the after-sales diagram, the fuel pump relay is referred to as the "injection relay".

Check the condition of the clips on the injection relay (in the engine fuse/relay box).Change the clips if necessary.

Ensure the presence of a +12 V accessories signal on channel 1 and on channel 3 of the relay d 'injection.Repair if necessary.


ECU (connector C) channel H4 channel 2 of the injection relay.


Check the resistance value of the relay by measuring across:channel 1 and channel 2 of the relay; replace the relay if the resistance is not in the region of: 84 Ω ± 2 Ω at 25˚C.

If the incident persists, change the fuel pump relay.


INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 010PRESENT

ORSTORED

LOW-SPEED FAN CIRCUIT (FAN 1)CO : CIRCUIT OPEN CC.0 : SHORT-CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V

NOTESConditions for applying diagnostic on stored fault.The fault is declared present following engine-starting or issuing of the command "AC271 low-speed fan relay.

Check the condition of the clips of the fan 1 relay (in the engine fuse/relay box).Change the clips if necessary.

Ensure the presence of a +12 V accessories signal on channel 1 of the fan 1 relay.Repair if necessary.

Connect the breakout connector in place of the ECU and check the: the insulation, the continuity and absence of spurious resistance of the following connection:

ECU (connector B) channel J4 channel 2 of the relay fan 1


Check the resistance value of the relay by measuring across:channel 1 and channel 2 of the relay; replace the relay if the resistance is not in the region of: 84 Ω ± 2 Ω at 25˚C.

If the incident persists, change the low-speed fan relay.


INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 014PRESENT

ORSTORED

SOLENOID VALVE CIRCUIT BLEED CANISTERCO : CIRCUIT OPEN CC.0 : SHORT-CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V

NOTESConditions for applying diagnostic on stored fault.The fault is declared present following engine-starting.

Check the connector on the solenoid canister bleed valve for proper mating and its general condition.Change the connector if necessary.

With the ignition on, check for presence of the +12 V on channel 2 of the solenoid canister bleed valve.

If no supply, check the insulation, the continuity and absence of spurious resistance of the following connection:

injection relay channel 5 channel 2 of the solenoid canister bleed valve.


Connect the breakout connector in place of the ECU and check the insulation, the continuity and absence of spurious resistance of the following connection:

ECU (connector C) channel F4 channel 1 of the solenoid canister bleed valve


Check the resistance value of the solenoid valve by measuring across:channel 1 and channel 2 of the solenoid canister bleed valve; replace the solenoid valve if the resistance is not in the region of: 26 Ω ± 4 Ω at 23˚C.

If the incident persists, change the solenoid canister bleed valve.


INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 015PRESENT

ORSTORED

HEATING/VENTILATION AUTORISATION INFOCO : CIRCUIT OPEN CC.0 : SHORT-CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V

NOTES

Conditions for applying diagnostic on stored fault.The fault is declared present following starting of the heating/ventilation.

Special notes:No injection or heating/ventilation faults must be present, since the backup modes of these ECU's can prevent starting of the heating/ventilation.

Connect the breakout connector in place of the ECU and check the insulation, the continuity, and absence of spurious resistance of the connections (CAN dialogue):

ECU (connector B) channel H3 channel... of the UCH (refer to diagrams for the vehicle and the year of make in question)

ECU (connector B) channel H4 channel... of the UCH (refer to diagrams for the vehicle and the year of make in question)


If the incident persists, diagnose the multiplex network.


INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 022PRESENT

COMPUTER

NOTESSpecial note:No starting of engine.

Ensure that the battery charge is correct; if this is not the case, run diagnostics on the charge circuit.

Connect the breakout connector in place of the ECU and check the insulation, the continuity and absence of spurious resistance of the following connections:

ECU connector C channel L3 channel 5 of the injection locking relay ECU connector C channel E1 channel 2 of the injection locking relay ECU connector B channel B4 injection fuse: + After-ignition

(refer to diagrams for the vehicle and year of make in question). ECU connector A channel H1 earthECU connector B channel L4 earthECU connector B channel M4 earthECU connector C channel M4 earth


If the incident persists, change the injection ECU.


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VDIAG No.: 04

DF 030PRESENT

ORSTORED

HIGH-SPEED FAN CIRCUIT (FAN 2)CO : CIRCUIT OPEN CC.0 : SHORT-CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V

NOTESConditions for applying diagnostic on stored fault.The fault is declared present following engine-starting or issuing of the command "AC272 fan relay - high speed".

Check the condition of the clips of the fan 2 and fan 1 relay (signs of percolation in the engine fuse/relay box).Change the clips if necessary.

Ensure the presence of a +12 V accessories signal on channel 1 of fan relay 2 and on channel 1 of the fan 1 relay (for signs of percolation).Repair if necessary.

Connect the breakout connector in place of the ECU and check the: the insulation, the continuity and absence of spurious resistance of the following connections:

ECU (connector B) channel K4 channel 2 of the relay fan 2 ECU (connector B) channel K4 channel 2 of the relay fan 1 (percolation)


Check the resistance value of the relay by measuring across:channel 1 and channel 2 of the relay; replace the relays if the resistance values are not in the region of:84 Ω ± 2 Ω at 25˚C.

If the incident persists, change fan relay 2 and fan relay 1 (percolation).


INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 045PRESENT

ORSTORED

MANIFOLD PRESSURE SENSOR CIRCUIT CO : CIRCUIT OPEN CC.0 : SHORT-CIRCUIT TO EARTH CO.1 : OPEN CIRCUIT OR SHORT-CIRCUIT ON + 12 V 1 DEF : SIGNAL INCOHERENCE

NOTESProcessing priority in event of stacked faults:– In priority process fault "DF137 motorised choke valve" if it is present or stored.

COCC.0CC.1

NOTESRun this diagnostic only in the case of a fault present with CO, CC.0 or CC.1.

Check the connector on the pressure sensor for proper mating and its general condition.Change the connector if necessary.

Check that the pressure sensor is correctly inserted in the inlet manifold.


ECU (connector A) channel B3 channel 1 of the pressure sensor ECU (connector A) channel C3 channel 2 of the pressure sensor ECU (connector A) channel A3 channel 3 of the pressure sensor



If the incident persists, change the pressure sensor.


INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 045

(continued)

1 DEF NOTESConditions for applying diagnostic on stored fault.The fault is declared present following engine-starting.

Ensure absence of air leaks on the inlet manifold, particularly at the manifold pressure sensor (behind the manifold).

Check on the diagnostic tool that parameter PR001 - manifold pressure - indicates a coherent value (if necessary perform a conformity check).If the pressure measurement is not coherent, change the manifold pressure sensor.

If the incident persists, change the manifold pressure sensor.


INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 084PRESENT

ORSTORED

CYLINDER 1 INJECTOR COMMAND CO : CIRCUIT OPEN CC.0 : SHORT-CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V

NOTESConditions for applying diagnostic on stored fault.The fault is declared present following engine-starting or issuing of he command "AC040 - injector, cylinder 1".

Check the injector connector for proper mating and general condition.Change the connector if necessary.

With the ignition on, check for presence of the +12 V on channel 1 of the injector.


injection relay 15-channel yoke connector injector 1

channel 5 channel 7 channel 1


Connect the breakout connector in place of the ECU and check the insulation, the continuity, and absence of spurious resistance of the following connection:

ECU connector C 15-channel yoke connector injector 1

channel K1 channel 1 channel 2


Check the resistance value of the injector by measuring across:channel 1 and channel 2 of the injector; replace the injector if the resistance is not in the region of:12 Ω ± 1 Ω at 20˚C.

If the incident persists, change injector No.1.


INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 085PRESENT

ORSTORED

CYLINDER 2 INJECTOR COMMANDCO : CIRCUIT OPEN CC.0 : SHORT-CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V

NOTESConditions for applying diagnostic on stored fault.The fault is declared present following engine-starting or issuing of the command "AC041 - injector, cylinder 2".



If no supply, Check the insulation, the continuity and absence of spurious resistance of the following connection:






channel J3 channel 2 channel 2





INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 086PRESENT

ORSTORED
















INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 087PRESENT

ORSTORED






injection relay 15-channel yoke connector (black)

injector 4





channel J4 channel 4 channel 2



If the incident persists, change the No.4 injector.


INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 111PRESENT

ORSTORED

MISFIRING ON CYLINDER 1

NOTES

Processing priority in event of stacked faults:– In priority process faults "DF084, DF085, DF086, DF087, DF160, DF161,

commanding injectors 1 to 6; DF192, DF193, DF194, DF195, DF196, DF197, commanding cylinder 1 to 6 coils; DF238, engine speed sensor; DF180, DF181, downstream oxygen probes 1 and 2; DF178, DF179, upstream oxygen probes 1 and 2; DF202, DF203, fuel supply, rows A and B and DF198 to DF201 heating of upstream and downstream oxygen probes, rows A and B" if present or stored.

Conditions for applying diagnostic on stored fault.The fault is declared present following engine-starting.

Special notes:Misfires will be indicated by illumination of the OBD warning light, which indicates that the vehicle is running beyond the pollution standards.Flashing of the OBD warning light indicates the risk of destruction of the catalytic converter.

Check the ignition system by verifying the state of the spark plug and interference suppression.Repair if necessary.

Check the compression ratio of the cylinder 1.Repair if necessary.

Check the engine-flywheel target (warpage or formation of cracks).Repair if necessary.

Ensure absence of leakage on the inlet manifold.Repair if necessary.


INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 111

(continued)

MISFIRING ON CYLINDER1

If nothing abnormal was found, there is a problem on the fuel system. The next step, therefore, is to check:

– The state of the petrol filter.– The petrol flow and pressure (the pressure should to be equal to 3.5 bar).– The cleanness of the tank.– The condition of the cylinder-1 injector,– The conformity of the fuel.

Replace the deficient part.


INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 112PRESENT

ORSTORED


NOTES

Processing priority in event of stacked faults:– In priority process faults "DF084, DF085, DF086, DF087, DF160, DF161 -

commanding injectors 1 to 6; DF192, DF193, DF194, DF195, DF196, DF197 -commanding cylinder 1 to 6 coils; DF238 - engine speed sensor; DF180, DF181 -downstream oxygen probes 1 and 2; DF178, DF179 - upstream oxygen probes 1 and 2; DF202, DF203 - fuel supply, rows A and B and DF198 to DF201 - heating of upstream and downstream oxygen probes, rows A and B" if present or stored.


Special notes:Misfiring will be indicated by illumination of the OBD warning light, which indicates that the vehicle is running beyond the pollution standards.Flashing of the OBD warning light indicates the risk of destruction of the catalytic converter


Check the compression ratio of cylinder 2.Repair if necessary.




INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 112

(continued)



– the state of the petrol filter.– the petrol flow and pressure (the pressure should to be equal to 3.5 bar).– the cleanness of the tank.– the condition of the cylinder-2 injector.– the conformity of the fuel.



INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 113PRESENT

ORSTORED


NOTES


commanding injectors 1 to 6; DF192, DF193, DF194, DF195, DF196, DF197 -commanding cylinder 1 to 6 coils; DF238 - engine speed sensor; DF180, DF181 -downstream oxygen probes 1 and 2; DF178, DF179 - upstream oxygen probes 1 and 2; DF202, DF203 - fuel supply, rows A and B and DF198 to DF201 - heating of the upstream and downstream oxygen probes, rows A and B" if present or stored.


Special notes:Misfiring will be indicated by illumination of the OBD warning light, which indicates that the vehicle is running beyond the pollution standards.Flashing of the OBD warning light indicates the risk of destruction of the catalytic converter.






INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 113

(continued)



– the state of the petrol filter.– the petrol flow and pressure (the pressure should to be equal to 3.5 bar).– the cleanness of the tank.– the condition of the-cylinder 3 injector.– the conformity of the fuel.

replace the deficient part.


INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 114PRESENT

ORSTORED


NOTES


commanding injectors 1 to 6; DF192, DF193, DF194, DF195, DF196, DF197 -commanding cylinder 1 to 6 coils; DF238 - engine speed sensor; DF180, DF181 -downstream oxygen probes 1 and 2; DF178, DF179 - upstream oxygen probes 1 and 2; DF202, DF203 - fuel supply, rows A and B and DF198 to DF201 - heating of the upstream and downstream oxygen probes, rows A and B" if present or stored.








INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 114

(continued)






INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 125PRESENT

ORSTORED

PEDAL POTENTIOMETER CIRCUIT TRACK 1CO.1 : OPEN CIRCUIT OR SHORT-CIRCUIT ON + 12 V CO.0 : CIRCUIT OPEN OR SHORT CIRCUIT TO EARTH 1 DEF : SIGNAL INCOHERENCE

NOTESProcessing priority in event of stacked faults:– In priority process fault "DF126 - pedal potentiometer circuit 2" if it is present or

stored.


Check that the accelerator pedal is properly actuating the sensor.


ECU connector B interconnexion. brown connector pedal sensor

channel A1channel K1channel B1

channel G2channel B2channel F2

track 2track 3track 4


Check the resistance value of pedal potentiometer No.1 by measuring across:channel 2 and channel 4 of the potentiometer; replace the potentiometer if the resistance is not in the region of: 1.7 KΩ ± 0,9 Ω at 20˚C.

If the incident persists, change the pedal potentiometer.


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VDIAG No.: 04

DF 126PRESENT

ORSTORED

PEDAL POTENTIOMETER CIRCUIT TRACK 2CO.1 : OPEN CIRCUIT OR SHORT-CIRCUIT ON + 12 V CO.0 : CIRCUIT OPEN OR SHORT CIRCUIT TO EARTH 1 DEF : SIGNAL INCOHERENCE

NOTES None


Check that the accelerator pedal is properly actuating the sensor.

Connect the breakout connector in place of the ECU and check the insulation, the continuity and absence of spurious resistance of the following connections:

ECU connector B interconnexion. brown connector pedal sensor

channel A3channel A2channel H1

channel E2channel D2channel C2



Check the resistance value of pedal potentiometer No.2 by measuring across:channel 5 and channel 1 of the potentiometer; replace the potentiometer if the resistance is not in the region of: 3 KΩ ± 2,2 KΩ at 20˚C.

If the incident persists, change the pedal potentiometer.


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VDIAG No.: 04

DF 135PRESENT

ORSTORED

BRAKE-PEDAL SENSOR CIRCUIT1 DEF : FAILURE ON EITHER BRAKE-PEDAL CONTACT2 DEF : FAILURE OF BOTH BRAKE-PEDAL CONTACTS

NOTESConditions for applying diagnostic on stored fault.The fault is declared present following switching-on of ignition and pressing of brake pedal.

Check the connector on the brake-pedal switch for proper mating and its general condition.Change the connector if necessary.

Ensure correct adjustment of the brake-pedal switch (refer to repair methods).

With the ignition on, check for presence of a +12 volts on channel A1 and on channel B1 of the stop-light switch.

Connect the breakout connector in place of the ECU and check the: the insulation, the continuity and absence of spurious resistance of the following connection:

ECU (connector B) channel B2 channel B3 of the stop-light switch.


Disconnect the pedal-sensor connector and check condition of contacts using an ohmmeter.Change The pedal sensor if it does not operate as specified below:

Pedal in rest position Pressing the pedal

continuity between channels B1 and B3insulation between channels A1 and A3

Insulation between channels B1 and B3continuity between channels A1 and A3

If the incident persists, diagnose the multiplex network (the information from sensor channel A3 is fed to the injection ECU via the multiplex network).


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VDIAG No.: 04

DF 137PRESENT

ORSTORED

MOTORISED CHOKE VALVE1 DEF : SIGNAL BEYOND UPPER LIMIT 2 DEF : SIGNAL BEYOND LOWER LIMIT 3 DEF : GENERAL FAULT ON MOTORISED CHOKE VALVE CONTROL

NOTES

Processing priority in event of stacked faults:– In priority process fault "DF045 manifold pressure-sensor circuit" if it is present or

stored.

Special notes:If the two potentiometers are faulty or if the throttle-valve motor is faulty, the motorised choke valve will adopt the backup position ("limp-home"), characterised by an engine speed locked at approximately 1500 rpm. These two faults result in illumination of the injection-fault indicator light (amber indicator light in the matrix: injection fault - criticality 1).

1 DEF2 DEF

NOTESConditions for applying diagnostic on stored fault.The fault is declared present following starting of the engine and action on the accelerator pedal.

Check the connector on the motorised choke valve for proper mating and its general condition.Change the connector if necessary.

Connect the breakout connector in place of the ECU and check the insulation, the continuity, and absence of spurious resistance on the connections between:

ECU (connector C) channel C3 channel 3 of the motorised choke valve ECU (connector C) channel B4 channel 4 of the motorised choke valve ECU (connector C) channel C4 channel 5 of the motorised choke valve ECU (connector C) channel B3 channel 6 of the motorised choke valve


AFTER REPAIR

If changing the ECU or the throttle body, programme the throttle-valve stops (refer to Diagnostics - Preambles).Follow the instructions to confirm repair.Erase the fault memory.Deal with any other faults as necessary.

INJ.ME7.4.6-1.0


17-151


VDIAG No.: 04

DF 137

(continued)


Ensure the presence of a 5-volt supply by measuring across channel 5 (+) and channel 3 (earth) of the motorised choke valve connector.If no supply, change the injection ECU.

Check the resistance value of the throttle-valve potentiometers by measuring across:channel 3 and channel 5 of the motorised choke valve (connector disconnected); replace the motorised choke valve if the resistance value of the potentiometers is not in the region of: 1.25 KΩ ± 20% at 20˚C.

If the incident persists, change the motorised choke valve.

3 DEF NOTESConditions for applying diagnostic on stored fault.The fault is declared present following starting of the engine and action on the accelerator pedal.

Check the motorised choke valve connector for proper mating and its general condition.Change the connector if necessary.


ECU (connector C) channel L4 channel 1 of the motorised choke valve ECU (connector C) channel M3 channel 2 of the motorised choke valve


AFTER REPAIR

Follow the instructions to confirm repair.Erase the fault memory.If changing the computer or the throttle body, programme the throttle-valve stops (refer to Diagnostics - Preambles).Deal with any other faults as necessary.

INJ.ME7.4.6-1.0


17-152


VDIAG No.: 04

DF 137

(continued)


Disconnect the motorised choke valve connector and connect a voltmeter across channels 1 and 2 of the connector; switch on the ignition and press the accelerator pedal: the motor supply voltage should vary between 0 and 5 volts (on average, around 2 volts), positive one way and negative the other.If the motor is not supplied even though the electrical connections are correct, change the injection ECU.

Check the resistance value of the motorised choke valve motor by measuring across:channel 1 and channel 2 of the motorised choke valve (connector demated); replace the motorised choke valve if the motor resistance is not in the region of: 1.4 Ω ± 0.5 Ω at 20˚C.

If the incident persists, change the motorised choke valve.

AFTER REPAIR

Follow the instructions to confirm repair.Erase the fault memory.If changing the computer or the throttle body, programme the throttle-valve stops (refer to Diagnostics - Preambles).Deal with any other faults as necessary.

INJ.ME7.4.6-1.0


17-153


VDIAG No.: 04

DF 157PRESENT

ORSTORED

BATTERY VOLTAGE

NOTESConditions for applying diagnostic on stored fault.The fault is declared present after engine has been running more than 3 minutes and vehicle speed > 0 kph.

Ensure correct state of battery / starter-motor lead, battery-earth cable to chassis, and chassis earth cable to engine-gearbox.Repair if necessary.

Ensure battery has a correct charge - check the charging circuit if necessary.

Connect the breakout connector in place of the ECU and check the insulation, the continuity and absence of spurious resistance of the following connection:

ECU connector B channel B4 injection fuse: + after-ignition (refer to diagrams for the vehicle and year of make in question).

ECU connector C channel L3 channel 5 of the injection locking relay



INJ.ME7.4.6-1.0


17-154


VDIAG No.: 04

DF 160PRESENT

ORSTORED

CYLINDER 5 INJECTOR COMMAND CO : CIRCUIT OPEN CC.0 : SHORT-CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V

NOTESConditions for applying diagnostic on stored fault.The fault is declared present following engine-starting or issuing of the command "AC044 injector, cylinder 5".

Check the injector connector for proper mating and its general condition.Change the connector if necessary.










Check the resistance value of injector No.5 by measuring across:channel 1 and channel 2 of the injector; replace the injector if the resistance is not in the region of:12 Ω ± 1 Ω at 20˚C.



INJ.ME7.4.6-1.0


17-155


VDIAG No.: 04

DF 161PRESENT

ORSTORED

CYLINDER 6 INJECTOR COMMAND CO : CIRCUIT OPENCC.0 : SHORT-CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V

NOTESConditions for applying diagnostic on stored fault.The fault is declared present following engine-starting or issuing of the command "AC600 injector, cylinder 6".

Check the injector connector for proper mating and its general condition.Change the connector if necessary.










Check the resistance value of injector No.5 by measuring across:channel 1 and channel 2 of the injector; replace the injector if the resistance is not in the region of:12 Ω ± 1 Ω at 20˚C.



INJ.ME7.4.6-1.0


17-156


VDIAG No.: 04

DF 174PRESENT

ORSTORED

No.1 CAMSHAFT SENSORCO : CIRCUIT OPEN CO.1 : OPEN CIRCUIT OR SHORT-CIRCUIT ON + 12 V CO.0 : CIRCUIT OPEN OR SHORT CIRCUIT TO EARTH1 DEF : NO SIGNAL


Check the connector on the camshaft sensor for proper mating and its general condition.Change the connector if necessary.


ECU (connector C) channel B1 channel 1 of the No.1 camshaft sensor ECU (connector C) channel C1 channel 2 of the No.1 camshaft sensor ECU (connector C) channel B2 channel 3 of No.1 camshaft sensor


Ensure the presence of a 5-volt supply by measuring across channel 3 (+) and channel 1 (earth) of the No.1 camshaft sensor connector.If no supply, change the injection ECU.

If the incident persists, change the No.1 camshaft sensor


INJ.ME7.4.6-1.0


17-157


VDIAG No.: 04

DF 175PRESENT

ORSTORED

No.2 CAMSHAFT SENSOR CO : CIRCUIT OPEN CO.1 : OPEN CIRCUIT OR SHORT-CIRCUIT ON + 12 V CO.0 : CIRCUIT OPEN OR SHORT CIRCUIT TO EARTH 1 DEF : NO SIGNAL


Check the camshaft-sensor connector for proper mating and its general condition.Change the connector if necessary.


ECU connector C 15-channel yoke connector No.2 camshaft sensor

channel B1channel C2channel B2

channel 9channel 10channel 8



Ensure the presence of a 5-volt supply by measuring across channel 3 (+) and channel 1 (earth) of the connector of the No.2 camshaft sensor.If no supply, change the injection ECU.

If the incident persists, change the No.2 camshaft sensor


INJ.ME7.4.6-1.0


17-158


VDIAG No.: 04

DF 176PRESENT

ORSTORED

NO.1 PINKING SENSORCO : CIRCUIT OPEN CC : SHORT-CIRCUIT

NOTES

Processing priority in event of stacked faults:– In priority process faults "DF174 and DF175 - No.1 and No.2 camshaft sensors" if

they are present or stored.

Conditions for applying diagnostic on stored fault.The fault is declared present following an engine speed greater than 2520 rpm for three seconds.


Check the torque-tightening value of the pinking sensor (for factory setting, see Repair Methods).

Ensure that the engine is not producing abnormal noise.In the event of abnormal noise, the cause of the noise must be eliminated before running the sensor diagnostics.


ECU (connector C) channel A1 channel 1 of the No.1 pinking sensorECU (connector C) channel A2 channel 2 of the No.1 pinking sensor


If the incident persists, change the No.1 pinking sensor.


INJ.ME7.4.6-1.0


17-159


VDIAG No.: 04

DF 177PRESENT

ORSTORED

NO.2 PINKING SENSORCO : CIRCUIT OPENCC : SHORT-CIRCUIT

NOTES

Processing priority in event of stacked faults:– In priority process faults "DF174 - and DF175 No.1 and No.2 camshaft sensors" - if

they are present or stored.

Conditions for applying diagnostic on stored fault.The fault is declared present following an engine speed greater than 2520 rpm for three seconds.


Check the torque-tightening value of the pinking sensor (for factory setting, see Repair Methods).

Ensure that the engine is not producing abnormal noise.in the event of abnormal noise, the cause of the noise must be eliminated before running the sensor diagnostics.


ECU (connector C) channel A3 channel 1 of the No.2 pinking sensor ECU (connector C) channel A4 channel 2 of the No.2 pinking sensor


If the incident persists, change te No.2 pinking sensor.


INJ.ME7.4.6-1.0


17-160


VDIAG No.: 04

DF 178PRESENT

ORSTORED

No.1 UPSTREAM OXYGEN PROBECO : CIRCUIT OPEN CC : SHORT-CIRCUIT 1 DEF : SIGNAL INCOHERENCE

NOTES

Processing priority in event of stacked faults:– In priority process faults "DF180 and DF181 No.1 and No.2 downstream oxygen

probes" if they are present or stored.

Conditions for applying diagnostic on stored fault.The fault is declared present following engine at idling speed for two minutes.

Special note:A fault on the No.1 upstream probe causes increased pollution and illumination of the OBD warning light.


Check for absence of air leaks on the exhaust system.

If the vehicle is used frequently in towns, carry out decarbonising.

Connect the breakout connector in place of the ECU and check the insulation, the continuity, and absence of spurious resistance on the following connections:

ECU (connector A) channel E4 channel 4 of the oxygen probe ECU (connector A) channel F4 channel 3 of the oxygen probe


If the incident persists, change the oxygen probe.


INJ.ME7.4.6-1.0


17-161


VDIAG No.: 04

DF 179PRESENT

ORSTORED

No.2 UPSTREAM OXYGEN PROBECO : CIRCUIT OPEN CC : SHORT-CIRCUIT 1 DEF : SIGNAL INCOHERENCE

NOTES

Processing priority in event of stacked faults:– In priority process faults "DF180 and DF181 - No.1 and No.2 downstream oxygen

probes" if they are present or stored.

Conditions for applying diagnostic on stored fault.The fault is declared present following engine at idling speed for two minutes.

Special note:A fault on the No.2 upstream probe causes increased pollution and illumination of the OBD warning light.









INJ.ME7.4.6-1.0



VDIAG No.: 04

DF 180PRESENT

ORSTORED

No.1 DOWNSTREAM OXYGEN PROBECO : CIRCUIT OPEN CC : SHORT-CIRCUIT 1 DEF : SIGNAL INCOHERENCE

NOTESConditions for applying diagnostic on stored fault.The fault is declared present following engine at idling speed for four minutes.









INJ.ME7.4.6-1.0

17-162


17-163


VDIAG No.: 04

DF 181PRESENT

ORSTORED

No.2 DOWNSTREAM OXYGEN PROBECO : CIRCUIT OPEN CC : SHORT-CIRCUIT1 DEF : SIGNAL INCOHERENCE

NOTESConditions for applying diagnostic on stored fault.The fault is declared present following engine at idling speed for four minutes.









INJ.ME7.4.6-1.0


17-164


VDIAG No.: 04

DF 182PRESENT

ORSTORED

ANTI-PINKING ADJUSTMENT1 DEF : SENSOR FAULTY 2 DEF : DETECTION OF SIGNALS OUTSIDE LOWER OR UPPER LIMITS

NOTES

Processing priority in event of stacked faults:– In priority process faults "DF176 and DF177 - No.1 and No.2 pinking sensor" - if they

are present or stored.

Conditions for applying diagnostic on stored fault.The fault is declared present following engine speed at 2520 rpm for five seconds.

2 DEF NOTESRun this diagnostic only in the case of a fault present with 2DEF.

Check the pinking-sensor connector for proper mating and its general condition.Change the connectors if necessary.

Check the tightening of the pinking sensors (for factory setting, see Repair Methods).

Ensure that the engine is not producing abnormal noise. in the event of abnormal noise, the cause of the noise must be eliminated before running the sensor diagnostics.

If the incident persists, change the pinking sensors.

1 DEF NOTESRun this diagnostic only in the case of a fault present with 1DEF.

Ensure that the engine is not producing abnormal noise (engine damage) and ensure that sensors are torqued to correct value.

Change the pinking sensors (even if no fault present), to ensure that the fault does not stem from the sensors.If the fault persists, change the injection ECU.


INJ.ME7.4.6-1.0


17-165


VDIAG No.: 04

DF 183PRESENT

ORSTORED

No.1 CATALYTIC CONVERTER

NOTES


probes; DF178 and DF179 - No.1 and No.2 upstream oxygen probes; DF111, DF112, DF113, DF114, DF185 and DF186 misfiring cylinders 1 to 6; DF202 and DF203 fuel supply, rows A and B" if they are present or stored.

Conditions for applying diagnostic on stored fault.The fault is declared present when engine is warm (that is, second richness loop closed), running at idling speed

Special note:A fault on the No.1 catalytic converter causes increased pollution and illumination of the OBD warning light.

Check the tightening of the oxygen probes.

Ensure absence of air leaks on the exhaust system.Repair if necessary.

Remove the No.1 catalytic converter and check the condition of the cake inside (clogging).If the cake appears correct, shake the catalytic converter to ensure that no internal parts are broken (metallic noises).Replace the catalytic converter if necessary.

If the incident persists, change the No.1 catalytic converter.


INJ.ME7.4.6-1.0


17-166


VDIAG No.: 04

DF 184PRESENT

ORSTORED

NO.2 CATALYTIC CONVERTER

NOTES


probes; DF178 and DF179 - No.1 and No.2 upstream oxygen probes; DF111, DF112, DF113, DF114, DF185 and DF186 - misfiring cylinders 1 to 6; DF202 and DF203 - fuel supply, rows A and B" if they are present or stored.

Conditions for applying diagnostic on stored fault.The fault is declared present when engine is warm (that is, second richness loop closed), running at idling speed

Special note:A fault on the No.2 catalytic converter causes increased pollution and illumination of the OBD warning light.

Check the tightening of the oxygen probes.

Ensure absence of air leaks on the exhaust system.Repair if necessary.

Remove the No.2 catalytic converter and check the state of the cake inside (clogging).If the cake appears correct, shake the catalytic converter to ensure that no internal parts are broken (metallic noises).Replace the catalytic converter if necessary.

If the incident persists, change the No.2 catalytic converter.


INJ.ME7.4.6-1.0


17-167


VDIAG No.: 04

DF 185PRESENT

ORSTORED


NOTES


commanding injectors 1 to 6; DF192, DF193, DF194, DF195, DF196, DF197 -commanding cylinder 1 to 6 coils; DF238 - engine speed sensor; DF180, DF181 -downstream oxygen probes 1 and 2; DF178, DF179 - upstream oxygen probes 1 and 2; DF202, DF203 - fuel supply, rows A and B and DF198 to DF201 - heating of upstream and downstream oxygen probes, rows A and B" if they are present or stored.


Special notes:Misfiring will be indicated by illumination of the OBD warning light, which indicates that the vehicle is running beyond the pollution standards.Flashing of the OBD warning light indicates the risk of destruction of the catalytic converter






INJ.ME7.4.6-1.0


17-168


VDIAG No.: 04

DF 185

(continued)






INJ.ME7.4.6-1.0


17-169


VDIAG No.: 04

DF 186PRESENT

ORSTORED


NOTES


commanding injectors 1 to 6; DF192, DF193, DF194, DF195, DF196, DF197 -commanding cylinder 1 to 6 coils; DF238 - engine speed sensor; DF180, DF181 -downstream oxygen probes 1 and 2; DF178, DF179 - upstream oxygen probes 1 and 2; DF202, DF203 - fuel supply, rows A and B and DF198 to DF201 heating of upstream and downstream oxygen probes, rows A and B" if present or stored.








INJ.ME7.4.6-1.0


17-170


VDIAG No.: 04

DF 186

(continued)

MISFIRING ON CYLINDER 6.


– the state of the petrol filter.– the petrol flow and pressure (the pressure should to be equal to 3.5 bar).– the cleanness of the tank.– the condition of cylinder-6 injector.– the conformity of the fuel.



INJ.ME7.4.6-1.0


17-171


VDIAG No.: 04

DF 188PRESENT

ORSTORED

ENGINE OIL TEMPERATURE SENSORCO.1 : OPEN CIRCUIT OR SHORT-CIRCUIT ON + 12 V CC.0 : SHORT-CIRCUIT TO EARTH

NOTES None

Check the oil temperature sensor for proper mating and its general condition.Change the connector if necessary.

Check the resistance value of the oil temperature sensor by measuring across:channel 1 and channel 2 of the sensor; replace the sensor if the resistance is null or equal to infinity (see chapter 12 of the RM for resistance values as a function of temperature).

Connect the breakout connector in place of the ECU and check the insulation, the continuity, and absence of spurious resistance on the following lines:

ECU (connector A) channel D1 channel 1 of the oil temperature sensor earth channel 2 of the oil temperature sensor



INJ.ME7.4.6-1.0


17-172


VDIAG No.: 04

DF 189PRESENT

ORSTORED

ENGINE-FLYWHEEL TARGET1 DEF : SIGNAL INCOHERENCE

NOTESConditions for applying diagnostic on stored fault.The fault is declared present following starting of the engine (or a starting attempt).

Check the connector on the flywheel-signal sensor for proper mating and its general condition. Change the connector if necessary.


ECU connector C channel E2 channel 1 of the engine speed sensorECU connector C channel E3 channel 2 of the engine speed sensor


Check the resistance value of the engine speed sensor by measuring across:Cannel 1 and channel 2 of the sensor; replace the sensor if the resistance is not in the region of: 375 Ω ± 30 Ω.

Remove the sensor and ensure it has not been rubbing on the flywheel target (warpage of the flywheel).Replace the sensor if necessary.

Check the state of the flywheel (condition of teeth, especially if removing), the engine / gearbox coupling plate, and tightening of the torque-converter nuts (refer to "torque values" in the RM). Change the flywheel if necessary.

If the incident persists, change the flywheel-signal sensor.


INJ.ME7.4.6-1.0


17-173


VDIAG No.: 04

DF 190PRESENT

ORSTORED

ROW-A CAMSHAFT-SHIFTING SOLENOID VALVECO.0 : CIRCUIT OPEN OR SHORT CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V LINE 1 DEF : FAULT ON SOLENOID VALVE A

NOTES

Processing priority in event of stacked faults:– In priority process faults "DF004 coolant-temperature sensor circuit; DF188 engine

oil TEMPERATURE sensor; DF174 and DF175 No.1 and No.2 camshaft sensors; DF238 engine speed sensor engine; DF137 motorised choke valve" if present or stored.

Conditions for applying diagnostic on stored fault.The fault is declared present with engine running at speed of between 700 and 4520 rpm for 10 seconds and engine temperature > 50˚C.

Ensure that the oil and coolant temperature probes indicate coherent values on the basis of parameters PR002 (coolant temperature) and PR183 (oil temperature).

Check the solenoid valve connector for proper mating and its general condition.Change the connector if necessary.

With the ignition on, check for presence of the +12 V on channel 2 of the solenoid valve.

If no supply, check the insulation, the continuity and absence of spurious resistance on the following connection:

injection relay channel 5 channel 2 of the row-A solenoid valve


Connect the breakout connector in place of the ECU and check the insulation, the continuity, and absence of spurious resistance on the following connection:

ECU (connector C) channel G1 channel 1 of the row-A solenoid valve



INJ.ME7.4.6-1.0


17-174


VDIAG No.: 04

DF 190

(continued)

ROW-A CAMSHAFT-SHIFTING SOLENOID VALVECO.0 : CIRCUIT OPEN OR SHORT CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V1 DEF : FAULT ON SOLENOID VALVE A

Check the resistance value of the solenoid valve by measuring across:channel 1 and channel 2 of the solenoid valve; replace the solenoid valve if the resistance is not in the region of: 7.1 Ω ± 0.5 Ω.

If the incident persists, change the row-A camshaft-shifting solenoid valve.


INJ.ME7.4.6-1.0


17-175


VDIAG No.: 04

DF 191PRESENT

ORSTORED

ROW-B CAMSHAFT-SHIFTING SOLENOID VALVECO.0 : CIRCUIT OPEN OR SHORT CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V 1 DEF : FAULT ON SOLENOID VALVE B

NOTES

Processing priority in event of stacked faults:– In priority process faults "DF004 coolant-temperature sensor circuit; DF188 engine

oil temperature sensor; DF174 and DF175 No.1 and No.2 camshaft sensors; DF238 engine speed sensor; DF137 motorised choke valve" if present or stored.

Conditions for applying diagnostic on stored fault.The fault is declared present with the engine running at a speed of between 700 and 4520 rpm for 10 seconds and engine temperature > at 50˚C.

Ensure that the oil and coolant temperature probes indicate coherent values on the basis of parameters PR002 (coolant temperature) and PR183 (oil temperature).

Check the solenoid-valve connector for proper mating and its general condition.Change the connector if necessary.

With the ignition on, check for presence of the +12 V on channel 1 of the solenoid valve.


injection relay 15-channel yoke connector row-B solenoid valve




ECU connector C 15-channel yoke connector row-B solenoid valve

channel F1 channel 15 channel 2



INJ.ME7.4.6-1.0


17-176


VDIAG No.: 04

DF 191

(continued)

ROW-B CAMSHAFT-SHIFTING SOLENOID VALVE

Check the resistance value of the solenoid valve by measuring across:channel 1 and channel 2 of the solenoid valve; replace the solenoid valve if the resistance is not in the region of: 7.1 Ω ± 0.5 Ω.

If the incident persists, change the row-B camshaft-shifting solenoid valve.


INJ.ME7.4.6-1.0


17-177


VDIAG No.: 04

DF 192PRESENT

ORSTORED

CYLINDER NO.1 COIL COMMANDCC.1 : SHORT-CIRCUIT ON + 12 VCO.0 : CIRCUIT OPEN OR SHORT CIRCUIT TO EARTH


Check the coil connector for proper mating and its general condition.Change the connector if necessary.

With the ignition on, check for presence of the +12 V on channel 2 of the coil.


injection relay channel 5 channel 2 of the No.1 ignition coil



ECU (connector A) channel H2 channel 1 of No.1 ignition coil


Check the resistance value of the coil windings by measuring across:channel 1 and channel 2 of the coil for the resistance of the primary winding; replace the coil if the resistance is not in the region of: 0.5 Ω ± 0,2 Ω.

If the incident persists, change the No.1 coil.


INJ.ME7.4.6-1.0


17-178


VDIAG No.: 04

DF 193PRESENT

ORSTORED

CYLINDER NO.2 COIL COMMANDCC.1 : SHORT-CIRCUIT ON + 12 V CO.0 : CIRCUIT OPEN OR SHORT CIRCUIT TO EARTH








ECU (connector A) channel H4 channel 1 No.2 ignition coil





INJ.ME7.4.6-1.0


17-179


VDIAG No.: 04

DF 194PRESENT

ORSTORED

CYLINDER NO. 3 COIL COMMANDCC.1 : SHORT-CIRCUIT ON + 12 VCO.0 : CIRCUIT OPEN OR SHORT CIRCUIT TO EARTH








ECU (connector A) channel H3 channel 1 No.3 ignition coil


Check the resistance value of the coil by measuring across:channel 1 and channel 2 of the coil for the resistance of the primary winding; replace the coil if the resistance is not in the region of: 0.5 Ω ± 0,2 Ω.



INJ.ME7.4.6-1.0


17-180


VDIAG No.: 04

DF 195PRESENT

ORSTORED

CYLINDER NO.4 COIL COMMANDCC.1 : SHORT-CIRCUIT ON + 12 V CO.0 : CIRCUIT OPEN OR SHORT CIRCUIT TO EARTH





injection relay 15-channel yoke connector No.4 ignition coil




ECU connector A 15-channel yoke connector No.4 ignition coil

channel G4 channel 12 channel 2


Check the resistance value of the coil by measuring across:channel 1 and channel 2 of the coil for the resistance of the primary winding; replace the coil if the resistance is not in the region of: 0.5 Ω ± 0,2 Ω.



INJ.ME7.4.6-1.0


17-181


VDIAG No.: 04

DF 196PRESENT

ORSTORED
















INJ.ME7.4.6-1.0


17-182


VDIAG No.: 04

DF 197PRESENT

ORSTORED
















INJ.ME7.4.6-1.0


17-183


VDIAG No.: 04

DF 198PRESENT

ORSTORED

NO.1 UPSTREAM OXYGEN PROBE HEATINGCO : CIRCUIT OPEN CC.0 : SHORT-CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V1 DEF : SIGNAL INCOHERENCE

NOTES None

COCC.0CC.1


Check the oxygen-probe connector for proper mating and its general condition; change the connector if necessary.

With the ignition on, check for presence of the +12 V on channel 1 of the oxygen probe.


injection relay channel 5 channel 1 of the No.1 upstream oxygen probe



ECU (connector C) channel L1 channel 2 of the No.1 upstream oxygen probe


Check the resistance value of the probe heating by measuring across:channel 1 and channel 2 of the probe; replace the probe if the resistance is not in the region of: 9 Ω ± 1 Ω at 20˚C.

The fault persists! Replace the oxygen probe.


INJ.ME7.4.6-1.0


17-184


VDIAG No.: 04

DF 198

(continued)

NO.1 UPSTREAM OXYGEN PROBE HEATING


Change the No.1 upstream oxygen probe.


INJ.ME7.4.6-1.0


17-185


VDIAG No.: 04

DF 199PRESENT

ORSTORED

No.2 UPSTREAM OXYGEN PROBE HEATINGCO : CIRCUIT OPEN CC.0 : SHORT-CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V1 DEF : SIGNAL INCOHERENCE

NOTES None

COCC.0CC.1





injection relay channel 5 channel 1 of the No.2 upstream oxygen probe



ECU (connector C) channel M1 channel 2 of the No.2 upstream oxygen probe





INJ.ME7.4.6-1.0


17-186


VDIAG No.: 04

DF 199

(continued)

No.2 UPSTREAM OXYGEN PROBE


Change the No.2 upstream oxygen probe.


INJ.ME7.4.6-1.0


17-187


VDIAG No.: 04

DF 200PRESENT

ORSTORED

NO.1 DOWNSTREAM OXYGEN PROBE HEATINGCO : CIRCUIT OPEN CC.0 : SHORT-CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V 1 DEF : SIGNAL INCOHERENCE

NOTES None

COCC.0CC.1





injection relay channel 5 channel 1 of the No.1 downstream oxygen probe



ECU (connector C) channel L2 channel 2 of the No.1 downstream oxygen probe





INJ.ME7.4.6-1.0


17-188


VDIAG No.: 04

DF 200

(continued)

NO.1 DOWNSTREAM OXYGEN PROBE HEATING


Change the No.1 downstream oxygen probe.


INJ.ME7.4.6-1.0


17-189


VDIAG No.: 04

DF 201PRESENT

ORSTORED

NO.2 DOWNSTREAM OXYGEN PROBE HEATINGCO : CIRCUIT OPEN CC.0 : SHORT-CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V1 DEF : SIGNAL INCOHERENCE

NOTES None

COCC.0CC.1





injection relay channel 5 channel 1 of the No.2 downstream oxygen probe



ECU (connector C) channel M2 channel 2 of the No.2 downstream oxygen probe





INJ.ME7.4.6-1.0


17-190


VDIAG No.: 04

DF 201

(continued)

NO.2 DOWNSTREAM OXYGEN PROBE HEATINGCO : CIRCUIT OPEN CC.0 : SHORT-CIRCUIT TO EARTH CC.1 : SHORT-CIRCUIT ON + 12 V1 DEF : SIGNAL INCOHERENCE


Change the No.2 downstream oxygen probe.


INJ.ME7.4.6-1.0


17-191


VDIAG No.: 04

DF 202PRESENT

ORSTORED

ROW-A FUEL FEED1 DEF : PRESSURE TOO LOW 2 DEF : PRESSURE TOO HIGH 3 DEF : PETROL-PRESSURE REGULATION FAULT

NOTES


commanding injectors 1 to 6; DF180, DF181. downstream oxygen probes 1 and 2; DF178, DF179 - upstream oxygen probes 1 and 2 and DF198, DF199, DF200 and DF201 - heating of upstream and downstream oxygen probes, rows A and B; DF204 and DF205 - ageing of upstream sensor, rows A and row B" if present or stored.

Conditions for applying diagnostic on stored fault.The fault is declared present following starting of the engine then heating until activation of the fans.

Special notes:A fuel-supply fault impedes correct engine (jolting, flat spots etc.) and triggers illumination of the OBD warning light (on three consecutive drives), which indicates that the vehicle is running beyond the pollution standards.An OBD test permanently transmits this fault during the driving cycles, allowing closed-loop richness control.

Perform a full check of the fuel feed / injection system by verifying:

– the state of the petrol filter.– the petrol flow and pressure (3.5 bar).– the cleanness of the tank.– the state and reliability of the injectors (no leaking injector).– the conformity of the fuel.– Any air leakage or fuel leakage on the fuel feed system.

Replace any defective parts.


INJ.ME7.4.6-1.0


17-192


VDIAG No.: 04

DF 203PRESENT

ORSTORED

ROW-B FUEL SUPPLY1 DEF : PRESSURE TOO LOW 2 DEF : PRESSURE TOO HIGH 3 DEF : PETROL-REGULATION FAULT

NOTES


commanding injectors 1 to 6; DF180, DF181 - downstream oxygen probes 1 and 2; DF178, DF179 - upstream oxygen probes 1 and 2 and DF198, DF199, DF200 and DF201 - heating of the upstream and downstream oxygen probes, rows A and B; DF204 and DF205 - ageing of upstream sensor, rows A and row B" if present or stored.

Conditions for applying diagnostic on stored fault.The fault is declared present following starting of the engine then heating until activation of the fans.

Special notes:A fuel-supply fault impedes correct engine operation (jolting, flat spots etc.) and triggers illumination of the OBD warning light (on three consecutive drives), which indicates that the vehicle is running beyond the pollution standards.An OBD test permanently transmits this fault during the driving cycles, allowing closed-loop richness control.

Perform a full check of the fuel feed / injection system, verifying:

– the state of the petrol filter.– the petrol flow and pressure (3.5 bar).– the cleanness of the tank.– the state and the reliability of the injectors (no leaking injector).– the conformity of the fuel.– any air leakage or fuel leakage on the fuel feed system.

Replace any defective parts.


INJ.ME7.4.6-1.0


17-193


VDIAG No.: 04

DF 204PRESENT

ORSTORED

AGEING OF UPSTREAM SENSOR - ROW A1 DEF : SIGNAL INCOHERENCE

NOTES


commanding injectors 1 to 6; DF180, DF181 - downstream oxygen probes 1 and 2; DF178, DF179 - upstream oxygen probes 1 and 2 and DF198, DF199, DF200 and DF201 - heating of the upstream and downstream oxygen probes, rows A and B; DF202 and DF203 - fuel supply, row A and row B" if present or stored.

Conditions for applying diagnostic on stored fault.Since the driving conditions for initiating the OBD test transmitting this fault are hard to reproduce (refer to the short-cycle chart in the Preambles),the approach is to run the diagnostics for this fault even if it is just stored.

Special notes:A problem related to ageing of the probe causes illumination of the OBD warning light, which indicates that the vehicle is running beyond the pollution standards.


Ensure there is no inversion of wiring between the upstream probe and the downstream probe.



If the incident persists, change the upstream oxygen probe, row A.


INJ.ME7.4.6-1.0


17-194


VDIAG No.: 04

DF 205PRESENT

ORSTORED

AGEING OF UPSTREAM SENSOR - ROW B1 DEF : SIGNAL INCOHERENCE

NOTES


commanding injectors 1 to 6; DF180, DF181 - downstream oxygen probes 1 and 2; DF178, DF179 - upstream oxygen probes 1 and 2 and DF198, DF199, DF200 and DF201 - heating of the upstream and downstream oxygen probes, rows A and B; DF202 and DF203 - fuel supply, row A and row B" if present or stored.

Conditions for applying diagnostic on stored fault.Since the driving conditions for initiating the OBD test transmitting this fault are hard to reproduce (refer to the short-cycle chart in the Preambles),the approach for this fault is to run the diagnostics, even if it is only stored.

Special notes:A problem related to ageing of the probe causes illumination of the OBD warning light, which indicates that the vehicle is running beyond the pollution standards.


Ensure there is no inversion of wiring between the upstream probe and the downstream probe.



If the incident persists, change the upstream oxygen probe, row B.


INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 235PRESENT

ORSTORED

cruise control /OVERSPEED GOVERNOR1 DEF : STEERING-WHEEL CONTROLS 2 DEF : INCOHERENCE

NOTES

Processing priority in event of stacked faults:– In priority process faults "DF135 - brake-pedal sensor circuit" if it is present or stored.

Conditions for applying diagnostic on stored fault.The fault is declared present following operation of the cruise-control/overspeed governor controls.

Using the diagnostic-tool "state" window and the information contained in the conformity check, check the system faults by getting in through state "ET194 - deactivation of the cruise-control / overspeed governor".

Apply the diagnostics procedure according to the parameter incriminated in the conformity check. For example, if the fault relates to the brake switch or the vehicle speed signal, apply the diagnostics procedures for those parts.

Using the diagnostic-tool state window and the information contained in the conformity check, ensure that pressing the steering-wheel and Instrument-panel switches sneds the proper signals to the injection ECU (by displaying state "ET192 - Cruise-control / overspeed governor function)".

If the data for state "ET192" are nonconform:Check the connector of the rotary switch on the steering wheel for proper mating and general condition, and check the condition of the cruise-control connector (in the steering wheel); change the connector(s) as necessary.


INJ.ME7.4.6-1.0


100Ω

17-196


VDIAG No.: 04

DF 235

(continued)

CRUISE CONTROL / OVERSPEED GOVERNOR


ECU connector A channel G1 channel 1 of the connector to the steering-wheel controls (in the wheel)

ECU connector A channel B2 channel 2 of the connector to the steering-wheel controls (in the wheel)


Check the resistance values of the control switches of the cruise control (refer to following diagrams).

Replace the switches if necessary.

Check the cruise-control / overspeed governor connector on the instrument pane for proper mating and its general condition: change the connector if necessary.


ECU connector B channel L1 channel A3 of the cruise-control ON/OFF switch.ECU connector B channel C1 channel B1 of the cruise-control ON/OFF switch.


Restart Suspend Set / More Set / Less

channel B2 of ECU connector A

channel G1 of ECU connector A

900Ω 300Ω


INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 235

(continued)

CRUISE CONTROL /OVERSPEED GOVERNOR

Ensure presence of the after-ignition supply on channel A2 of the connector at the cruise-control / overspeed governor switch.Repair if necessary.

Demate the connector on the overspeed governor / cruise control switch, and check the condition of the contacts using an ohmmeter.Change the switch if it does not operate as specified below:

Switch on cruise-control function Switch on overspeed governor function

continuity between channels A2 and A3insulation between channels A2 and B1

insulation between channels A2 and A3continuity between channels A2 and B1

Replace the switch if necessary.


INJ.ME7.4.6-1.0


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VDIAG No.: 04

DF 238PRESENT

ORSTORED

ENGINE SPEED SENSORCO : CIRCUIT OPEN 1 DEF : SIGNAL INCOHERENCE


Check the connector on the flywheel-signal sensor for proper mating and its general condition: change the connector if necessary.


ECU connector C channel E2 channel 1 of the engine speed sensor ECU connector C channel E3 channel 2 of the engine speed sensor


Check the resistance value of the engine speed sensor by measuring across:channel 1 and channel 2 of the sensor; replace the sensor if the resistance is not in the region of: 375 Ω ± 30 Ω.

Remove the sensor and ensure it has not been rubbing on the flywheel target (warpage of the flywheel)Replace the sensor if necessary.

Check the state of the flywheel (condition of teeth, especially if removing), of the engine/gearbox coupling plate, and tightening of the torque- converter nuts (refer to MR for torque values).Change the flywheel if necessary.

If the incident persists, change the flywheel-signal sensor.


INJ.ME7.4.6-1.0



VDIAG No.: 04 Fault finding - Conformity check

NOTESThe values indicated in this conformity check are given for reference purposes only.It is therefore essential to consult the corresponding chapter of this Repair Manual.Application conditions: engine stopped, ignition on, at 20°C.


Display and notes

Fault finding

1 + After ignitionET001: + After-ignition computer. ACTIVE

In the event of problems, run the diagnostics for the

charging circuit.PR004: Computer supply voltage. 11 < X < 14 V

2 Immobiliser ET002: immobiliser. INACTIVE None

3 Multiplexing

ET191: Injection line > ABS (CAN connection).

ACTIVEIn the event of

problems,Run the diagnostics

for the multiplex network.

ET015: Injection line > TA. ACTIVE

ET016: Injection line > CA. ACTIVE

4Computer

configuration

PR077: Computer reference. 8200119368

This information is in the identification

screen.

PR084: Vendor number. 36 33 37

PR085: Hardware version. 8200057811

PR052: Programme number. 0012

PR058: Software version number. 8 A

PR054: Calibration number. 0100

PR057: VDIAG number. 04

INJ.ME7.4.6-1.0

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VDIAG No.: 04

NOTESThe values indicated in this conformity check are given for reference purposes only.It is therefore essential to consult the corresponding chapter of this Repair Manual.Application conditions: engine stopped, ignition on, temp. 20°C.


Display and notes

Fault finding

5

Throttle position-valve potentiometer

(without pressing the accelerator

pedal).

ET003: Throttle position valve - no-load position.


problems,reprogramme the motorised choke

valve. If the problem

persists, run the diagnostic

procedure for the DF137 "motorised choke valve" fault.

ET005: Throttle position valve - full load position.

INACTIVE

PR017: Throttle valve - measured position.

2 < X < 10%

PR118: Motorised choke valve upper stop.

95 < X < 100 d˚

PR119: Motorised choke valve lower stop.

1 < X < 10 d˚

6

Accelerator-pedal position potentiometer

(without pressing the

pedal).

PR0112: Measured pedal position. 0 < X < 1% In the event of problems:

run the diagnostic procedure for the

"pedal potentiometer circuits, track 1 and

track 2" faults (DF125 and DF126).

PR008: Programming value no-load position.

0 < X < 0.5 V

ET128: Accelerator pedal position: no load.

INACTIVE

ET129: Accelerator pedal position: full-load.

ACTIVE

7 Manifold pressure sensor.

PR001: Manifold pressure.

= atmospheric pressure ± 10 %

In the event of problems, run the

diagnostic procedure for the "manifold pressure

sensor" fault (DF045).

PR016: Atmospheric pressure.

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VDIAG No.: 04



Display and notes

Fault finding

8 Downstream

oxygen probe.

ET031: Downstream O2-probe heating.

INACTIVE In the event of problems:

run the diagnostic procedure for the

faults "No.1 and No.2 downstream oxygen probes (DF180 and

DF181)".

PR010: Voltage, downstream oxygen probe.

350 < X < 550 mV

9 Upstream

oxygen probe.

ET030: Upstream O2-probe heating.

INACTIVE In the event of problems: run the

diagnostic procedure for faults

"No.1 and No.2 oxygen probes

(DF178 and DF179)".

PR009: Voltage, upstream oxygen probe.

350 < X < 550 mV

10Heating/

ventilation.

ET041: Air-conditioning authorisation.

INACTIVE

None

PR044: Power absorbed by the AC compressor.

0 < X < 300 W

11Power-steering

pressure switch.

ET034: Power-steering pressure switch.

ACTIVE if steering wheel moved.

None

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VDIAG No.: 04

NOTESThe values indicated in this conformity check are given for reference purposes only.It is therefore essential to consult the corresponding chapter of this Repair Manual.Application conditions: engine stopped, ignition on, temp. 20˚C.


Display and notes

Fault finding

12Cruise-control /

overspeed governor.

ET192: Cruise-control / overspeed governor function.

If switches pressed:

STATE1: Suspend switch pressed.

STATE 2: Restart switch pressed.

STATE 3: Overspeed-governor ON/OFF switch pressed.

STATE 4: cruise-control ON/OFF switch pressed.

STATE 5: incrementation switch pressed.

STATE 6: decrementation switch pressed.

INACTIVE If no switches pressed.

In the event of problems: run the

diagnostic procedure for the

fault "Cruise-control / overspeed governor

(DF235)".

ET194:Deactivation of cruise-control / overspeed governor.

IN if no fault detected.

Diagnose the multiplex network.

STATE1: vehicle speed invalid.

STATE 2: Vehicle speed not refreshed.

STATE 3: Problem detected by the injection ECU.

Run diagnostics on the injection system.

INJ.ME7.4.6-1.0


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VDIAG No.: 04



Display and notes

Fault finding

12 Cruise-control /

overspeed governor.

ET194: Deactivation of cruise-control / overspeed governor.

STATE 4: Fault on cruise-control or overspeed governor.




(DF235)".

STATE 5: brake pedal pressed.


diagnostic procedure for the fault "brake-pedal

sensor circuit (DF135)".

STATE 6: Disconnecting engine / gearbox.

STATE 7: Gear lever in neutral position.

In the event of problems, run the diagnostics for the automatic gearbox.

STATE 8: Incoherence between the selection and the vehicle speed.

STATE9: Pressing the Suspend switch.




(DF235)".

STATE10: Antispin selection.

In the event of problems, run the diagnostics for the multiplex network.

INJ.ME7.4.6-1.0


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VDIAG No.: 04

NOTES

The values indicated in this conformity check are given for reference purposes only.It is therefore essential to consult the corresponding chapter of this Repair Manual.Running the "actuator" command is a way of reporting faults when stored, or of checking the reliability of the actuators.Application conditions: engine stopped, ignition on, temp. 20°C.


Display and notes

Fault finding

Command window

13 Relay.

AC010: Fuel pump relay. The fuel pump should be heared

running.

In the event of problems, consult

diagnostic AC 010.

AC271: Low-speed fan relay. The fan should be heared running at

low speed.


diagnostic AC 271.

AC272: High-speed fan relay. The fan should be heared running at

high speed.


diagnostic AC 272.

14

Camshaft-shifting

solenoid valves.

AC648: No.1 camshaft shifter command.

The solenoid valve should be heared running.



fault "row-A camshaft-shifting solenoid valve

(DF190)".

AC649: No.2 camshaft shifter command.

The solenoid valve should be

heared operating.



fault "row-B camshaft-shifting solenoid valve

(DF191)".

INJ.ME7.4.6-1.0


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VDIAG No.: 04

NOTES

The values indicated in this conformity check are given for reference purposes only.It is therefore essential to consult the corresponding chapter of this Repair Manual.Running the "actuator" command is a way of reporting faults when they are stored, or of checking the reliability of the actuators.Application conditions: engine stopped, ignition on, temp. 20°C.


Check or ActionDisplay and notes Fault finding

Command window

15 Oxygen probes.

AC261: Upstream O2-probe heating.

Although its action cannot be heared or

seen, this command is used for checking the

reliability of the heating function of the probes.


diagnostic procedure for the "heating No.1 and

No.2 upstream oxygen probes" faults (DF198 and DF199)".

AC262: Downstream O2-probe heating. Although its action

cannot be seen or heared, this command

is used for checking the reliability of the probe

heating function.



"No.1 and No.2 downstream oxygen probe heating" faults (DF200 and DF201)".

16 Canister bleed.

AC016: Canister-bleed solenoid valve.

The canister-bleed solenoid valve should

operate.



"canister-bleed solenoid valve circuit"

fault (DF014)".

17Erasing the fault

memory.RZ007: Erasing the fault

memory.Used for erasing stored

faults.None

18Reinitialising the programming.

AC016: Reinitialising the programming.

Used for reinitialising the programming.

None

INJ.ME7.4.6-1.0


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VDIAG No.: 04

NOTES

The values indicated in this conformity check are given for reference purposes only.It is therefore essential to consult the corresponding chapter of this Repair Manual.Running the "actuator" command is a way of reporting faults when they are stored, or of checking the reliability of the actuators.Application conditions: engine stopped, ignition on, temp. 20°C.



Command window

19 Ignition.

AC601: Ignition, cylinder 1.

The action of these commands cannot be seen or heared; the

commands are therefore used for

checking the reliability of the ignition system

and, where necessary, identifying stored faults.



"commanding cylinder 1 to 6 coils" faults,

depending on the coil in question

(DF192 for cylinder 1DF193 for cylinder 2 DF194 for cylinder 3 DF195 for cylinder 4 DF196 for cylinder 5

DF197 for cylinder 6)".






20 Petrol

injection.

AC040: Injector, cylinder 1.

The action of these commands cannot be seen or heared; the

commands are therefore used for

checking the reliability of the injection system and where necessary

identifying stored faults.



"cylinder 1 to 6 injector command"

faults, depending on the injector in question(DF084 for cylinder 1 DF085 for cylinder 2DF086 for cylinder 3 DF087 for cylinder 4 DF160 for cylinder 5

DF161 for cylinder 6)".

AC041: injector, cylinder 2.





INJ.ME7.4.6-1.0


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VDIAG No.: 04

INSTRUCTIONS

The values indicated in this conformity check are given for reference purposes only.It is therefore essential to consult the corresponding chapter of this Repair Manual.Running the "actuator" command is a way of reporting faults when they are stored, or of checking he reliability of the actuators.Application conditions: engine stopped, ignition on, temp. 20°C.



Command window

21Writing of the

VIN.VP001: Writing of the VIN.

Used for writing the VIN.

None

22Locking and

unlocking the injectors.

AC591: Locking the injector command.

Used for turning the engine without starting (e.g. for measuring the

compression).

NoneAC592: Unlocking the injector

command.

INJ.ME7.4.6-1.0



VDIAG No.: 04

NOTESThe values indicated in this conformity check are given for reference purposes only.It is therefore essential to consult the corresponding chapter of this Repair Manual.Application conditions: engine warm at idling speed, without electrical users.


Display and notes

Fault finding

1 + After ignitionET001: + After-ignition computer ACTIVE

In the event of problems, run the diagnostics for the

charging circuit.PR004: Computer supply voltage 11 < X < 15 V

2 Immobiliser ET002: Immobiliser INACTIVEIf active run the

diagnostics for the immobiliser system.

3 Multiplexing

ET191: Injection line > ABS (CAN connection).


problems, run the diagnostics for the multiplex network.

ET015: Injection line > TA ACTIVE

ET016: Injection line > CA. ACTIVE

4

Throttle position-valve potentiometer

(without pressing the accelerator

pedal).

ET003: Throttle position valve - no-load position.

ACTIVE


diagnostic procedure for fault "DF137 - motorised

choke valve".

ET005: Throttle position valve - full load position.

INACTIVE

PR017: Throttle valve measured position.

1.5 < X < 3 %

PR118: Motorised choke valve upper stop.

95 < X < 100 d˚

PR119: Motorised choke valve lower stop.

1 < X < 10 d˚

INJ.ME7.4.6-1.0

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VDIAG No.: 04



Display and notes

Fault finding

5

Accelerator-pedal position potentiometer

(without pressing the

pedal).

PR0112: Measured pedal position. 1 < X < 10% In the event of problems, run the


"pedal potentiometer track 1 and 2 circuits"

faults (DF125 and DF126)".

PR008: Programming the no-load position value.

0 < X < 0.5 V

ET128: Accelerator pedal position: no load.

INACTIVE

ET129: Accelerator pedal position: full-load.

ACTIVE

6 Coolant

temperature sensor.

PR002: Coolant temperature.

X = engine temperature ± 5˚C

(-40 < X < 140˚C)



"coolant temperature sensor" fault (DF004).

7 Engine speed.

PR006: Engine speed.= engine idling-speed reference

± 50 rpm

None

PR041: Engine idling speed reference.

750 rpm ± 50 rpm if no fast idling

ET038: Fast idling. ACTIVE if heating/ventilation

operating and refrigerant

pressure greater than 13 bar

ET039: idle speed regulation. ACTIVE

INJ.ME7.4.6-1.0


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VDIAG No.: 04




notesFault finding

8 Air temperature

sensor. PR003: Air temperature.

X = temperature under bonnet

± 5˚C

(-40 < X < 128˚C)


diagnostic procedure for the "air temperature sensor"

fault (DF003).

9 Oil temperature

sensor. PR183: Oil temperature.

X = engine temperature ± 5˚C

(-40 < X < 154˚C)


diagnostic procedure for the "oil temperature sensor"

fault (DF188).

10Exhaust

temperature.PR007: Exhaust temperature. 0 < X < 1200˚C None

11Manifold

pressure sensor.

PR001: Manifold pressure. 250 < X < 450 mbIn the event of

problems, run the diagnostic

procedure for the "manifold pressure

sensor" fault (DF045).

PR016: Atmospheric pressure. = atmospheric pressure

12 Injection.

ET072: Injection cut-off.ACTIVE under no-

load throttle command or overspeed.

None

PR050: Injection duration. 2 < X < 5 µs

PR029: Fuel consumption. ... < X <.... l / h

INJ.ME7.4.6-1.0


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VDIAG No.: 04




13 Ignition.

PR051: Ignition advance. 0 < X < 20 d˚



"coil command cylinder 1 to 6" faults

(DF192 to DF197) depending on the

cylinder in question.

PR036: Coil charging time. 1700 < X < 2000 µs

PR087: Advance timing correction, cylinder 1.

-450 < X < -550 µs


-450 < X < -550 µs


-450 < X < -550 µs


-450 < X < -550 µs

PR095: Advance timing correction, cylinder 5. -450 < X < -550 µs


-450 < X < -550 µs

14 Canister bleed.

PR023: COR, canister-bleed solenoid valve.

0 < X < 20% In the event of problems, run the

diagnostic procedure for the "Canister-bleed

solenoid valve circuit" fault (DF014).

ET117: Canister bleed command.

ACTIVE during bleed and INACTIVE

otherwise.

INJ.ME7.4.6-1.0


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VDIAG No.: 04




15 Richness.

ET037: Richness-ratio regulation.

ACTIVE

MFJIn the event of problems, use the

diagnostic procedure for the "fuel supply, row A and row B" faults

(DF202 and DF203).

PR035: Richness correction value.

0,75 < X < 1.25 %

PR185: Average richness factor, row 1.

0,75 < X < 1.25 %

PR186: Average richness factor, row 2.

0,75 < X < 1.25 %

PR125: Adaptative richness offset.

-5 < X < 5 %

16 Engine.

PR182: Engine load. 10 < X < 20%

NoneET151: Torque fade:

changing gear.ACTIVE when shifting

gears.

PR108: Engine torque. -10 < X < 10 N.m

PR013: Average pinking signal.

0.5 < X < 2 VIn the event of

problems, run the diagnostic

procedure for the "No.1 and No.2

pinking sensor" faults (DF176 and DF177).

ET026: Camshaft-shifter command

INACTIVE (at idling speed)

NoneET148: "Meshing IP" signal ACTIVE

INJ.ME7.4.6-1.0


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VDIAG No.: 04



Display and notesFault finding

17 Downstream

oxygen probe.

ET031: Downstream O2-probe heating.

ACTIVE or INACTIVE depending on

command



"No.1 and No.2 downstream oxygen

probes" faults (DF180 and DF181).

PR010: Voltage, downstream oxygen probe.

300 < X < 900 mV

18 Upstream

oxygen probe.

ET030: Upstream O2-probe heating.

ACTIVE or INACTIVE depending on

command



"No.1 and No.2 oxygen probes" faults (DF178 and DF179).

PR009: Voltage, upstream oxygen probe.

0 < X < 900 mV

19 Heating/

ventilation.

ET141: Air-conditioning authorisation.

ACTIVE if no injection fault leading to a drop in

engine performance, and no fault on fan. None

PR044: MFJPower absorbed by AC compressor.

200 < X < 1000 W

20Power-steering

pressure switch.

ET034: Power-steering pressure switch.

ACTIVE if steering wheel moved.

None

INJ.ME7.4.6-1.0

INJECTIONDiagnostics - Control interpretation 17


VDIAG No.: 04 Diagnostics - Control interpretation

AC271

Low-speed fan relay

NOTES There must be no faults present.

Ensure the correct condition of the fan connectors.Repair if necessary.

Connect the breakout connector in place of the ECU and check the insulation, the continuity and absence of spurious resistance on the following connection:

ECU (connector B) channel J4 channel 2 of the fan 1 relay


Check the following, using the electrical diagrams for the engine cooling system:

– the relay supply,– the soundness of the fan earth connections,– the condition of the fan relay (resistance of windings and condition of power circuits),– the fan resistance values,



INJ.ME7.4.6-1.0

17-214


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VDIAG No.: 04

AC272

High-speed fan relay


Ensure the correct condition of the fan connectors.Repair if necessary.

Connect the breakout connector in place of the ECU and check the insulation, the continuity and absence of spurious resistance on the following connections:

ECU (connector B) channel K4 channel 2 of the fan 2 relay ECU (connector B) channel K4 channel 2 of the fan 1 relay (signs of percolation)


Check the following, using the electrical diagrams for the engine cooling system:

– the relay supply,– the soundness of the fan earth connections,– the condition of the fan relay (resistance of windings and condition of power circuits),– the fan resistance values,



INJ.ME7.4.6-1.0


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VDIAG No.: 04

AC010

Fuel pump relay


Ensure the correct condition of the fuel-pump connector.Repair if necessary.


ECU (connector C) channel H4 channel 2 of the fuel pump relay.


Check the following, using the electrical diagrams for the injection system:

– the relay supply,– the soundness of the fuel-pump earth connections,– the state of the fuel pump relay (resistance of windings and condition of power circuits),– the fuel-pump resistors,– The connection with channel 5 of the relay channel... of the fuel-pump connector (refer to

diagrams for the vehicle and year of make in question).



INJ.ME7.4.6-1.0



VDIAG No.: 04 Fault finding - Help

PINOUT OF 15-WAY BLACK YOKE CONNECTOR ON INJECTION SUB-HARNESS(above cylinder row "A").

ECU channel No.

15-way yoke cnctr No. PINOUT

K 1 connector C

1 Command No.1 injector (channel 2)

J 3 connector C


K 3 connector C

3 command No.3 injector (channel 2)

J 4 connector C


K 4 connector C


K 2 connector C


7 + APC from channel 5 of the injection relay

B 2 connector C

8 + 5 volts; channel 3 of the bank "B" camshaft sensor

B 1 connector C

9 earth; channel 1 of the bank "B" camshaft sensor

C 2 connector C

10 signal; channel 2 of the bank "B" camshaft sensor

11

G 4connector C

12 No.4 ignition coil command (channel 2)

G 3 connector C


G 2 connector C


F 1 connector C

15 Camshaft shifter bank "B" command (channel 2)

INJ.ME7.4.6-1.0

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VDIAG No.: 04

POSITION DIAGRAMS - PROBES AND ACTUATORS

REAR BANK/BANK "B" (or No.2)

L 7 X Gearbox

FRONT BANK/BANK "A" (or No.1)

INJ.ME7.4.6-1.0

INJECTIONDiagnostics - Customer complaints 17


VDIAG No.: 04 Diagnostics - Customer complaints


NO COMMUNICATION WITH THE COMPUTER CHART 1

STARTING FAULTS CHART 2

IDLE SPEED FAULTS CHART 3

PROBLEMS WHEN DRIVING CHART 4

INJ.ME7.4.6-1.0

17-219

INJECTIONFault finding - Fault charts 17


VDIAG No.: 04 Fault finding - Fault charts

Chart 1 NO COMMUNICATION WITH THE COMPUTER

NOTES None

Try the diagnostic tool on another vehicle.

Check:

– The connection between the diagnostic tool and the diagnostic socket (cable condition).– Injection, engine and passenger-compartment fuses.


Ensure the presence of a + 12 volts battery on channel 16 and of an earth on channel 5 and channel 4 of the diagnostic socket.Repair if necessary.

Connect the breakout connector in place of the ECU and check the insulation, the continuity and absence of spurious resistance on the following connections:

ECU connector A, channel H1 earth ECU connector B, channel L4 earth ECU connector B, channel M4 earth ECU connector B, channel B4 + APCECU connector B, channel H2 channel 7 diagnostic socket ECU connector C, channel L3 channel 5 injection locking relay ECU connector C, channel M4 earth.

AFTER REPAIR Perform fault-finding using the diagnostic tool.

INJ.ME7.4.6-1.0

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VDIAG No.: 04

Chart 2 STARTING FAULTS


Ensure that the starter motor is spinning correctly (approximately 250 rpm).If this is not the case:– Check the state of the battery (oxydation, tightness of terminals).– Ensure correct condition of the engine earth strap.– Ensure correct condition of the battery-to-starter motor cable.– Check the condition of the battery.– Check the reliability of the starter motor.

Checking the fuel supply:– Check effective presence of petrol (fuel gauge failure...)– Ensure the fuel is of the correct type.– Ensure that no hoses are pinched (especially after removal work).– Check the state of the fuel filter; change the filter if necessary.– Ensure that the tank vent is not blocked.– Ensure that the fuel pump is running correctly and that fuel is feeding to the injector manifold.– Ensure correct condition of the fuel pressure regulator by checking the pressure (3.5 bar).

Checking the supply of air:– Check the condition of the intake ducts (no air leaks, pinching of the air intake pipe etc.).– Ensure the correct condition of the air filter; change the filter if necessary.– Disconnect the pipe connecting the canister-bleed solenoid valve to the inlet manifold; plug the canister inlet

to the manifold to avoid creating air eakage. If the problem has disappeared, change the canister-bleed solenoid valve.


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Chart 2

(continued)

Checking the ignition:– Check the condition of the spark plugs; change latter if necessary.– Ensure that the spark plugs are the correct type for the engine.– Remove the engine speed sensor and ensure that it has not been rubbing on the target (increase the air

gap). If it was the case, check the state of the flywheel.– Ensure the correct condition of the ignition coils.

Checking the exhaust system:– Ensure that the exhaust system is in good condition.– Remove the catalytic converters and check the state of the cake inside (clogging).– Shake the catalytic converters to ensure that the cake is not broken (metallic noises)

Checking the state of the engine:– Ensure that the rotates freely.– Check the cylinder compressions.– Set the timing.


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Chart 3 IDLE SPEED FAULTS


Checking the fuel supply:– Check there is fuel present (fuel gauge faulty).– Ensure the fuel is of the correct type.– Check for absence of pinched hoses (especially after removal work).– Check the state of the fuel filter; change the filter if necessary.– Ensure that the tank vent is not blocked.– Ensure the correct condition of the fuel pressure regulator by checking the pressure (3.5 bar).

Checking the supply of air:– Check the condition of the intake ducts (air leaks, pinching of the air intake pipe etc.)– Ensure the correct condition of the air filter; change the latter if necessary.– Disconnect the pipe connecting the canister-bleed solenoid valve to the inlet manifold; plug the canister inlet

to the manifold to avoid creating air leakage. If problem disappears,change the canister-bleed solenoid valve.

– Check that the brake servo is not leaking (air leakage).

Checking the ignition:– Check the condition of the spark plugs, and change if necessary.– Ensure that the spark plugs are the correct type for the engine.– Check for correct condition of the ignition coils.

Checking the state of the engine:– Check for correct oil level on the oil dipstick (not over-filled).– Check the cylinder compressions.– Set the timing.


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Chart 4 PROBLEMS WHEN DRIVING


Checking the fuel supply:– Check there is fuel present (fuel gauge faulty).– Ensure the fuel is of the correct type.– Check for absence of pinched hoses (especially after removal work).– Check the state of the fuel filter; change the filter if necessary.– Ensure that the tank vent is not blocked.– Ensure the correct condition of the fuel pressure regulator by checking the pressure (3.5 bar).

Checking the supply of air:– MFJCheck the condition of the inlet manifolds (air leak, pinching of the air intake pipe etc.).– Ensure the correct condition of the air filter, and that it is not distorted; change if necessary.– Disconnect the pipe connecting the canister-bleed solenoid valve to the inlet manifold; plug the canister inlet

to the manifold to avoid creating air leakage. If problem disappears, change the canister-bleed solenoid valve.

– Check that the brake servo is not leaking (air leaks).– Remove the intake manifold and check that the throttle valve is not gummed up.

Checking the ignition:– Check the condition of the spark plugs, and change if necessary.– Ensure that the spark plugs are the correct type for the engine.– Ensure the correct condition of the ignition coils.– Remove the engine speed sensor and ensure that it has not been rubbing on the target (increase the air

gap). If this was the case, check the state of the flywheel.


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Chart 4

(continued)

Checking the state of the engine:– Check the oil level on the dipstick (not overfilled).– Check the cylinder compressions.– Set the timing.– Check the state of the engine target speed sensor (flywheel).– Ensure that the engine cooling is operating correctly (that is, engine is in optimal operating conditions - not

too cold, not too hot).

Checking the exhaust system:– Ensure that the exhaust system is in good condition.– Remove the catalytic converters and check the state of the cake inside (clogging).– Shake the catalytic converters to ensure that the cake is not broken (metallic noises).

Checking the running gear:– Check that the wheels turn freely (no sticking calipers, drums or bearings).– Check the tyre pressures and the state of the tread (no bulges).

INJ.ME7.4.6-1.0

κωδικοί βλαβών MR341LAGUNA1

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