Technical Note 3780A

Vehicle Type Engine

Kangoo XCXX F9Q
Laguna II XGXX F9Q - G9T
Espace IV JK0X F9Q - G9T
Vel Satis XJXX G9T

INJECTION
FAULT FINDING EDC15C13 - CB
Passenger vehicle - Vdiag 19

77 11 327 062 SEPTEMBER 2003 EDITION ANGLAISE

"The repair methods given by the manufacturer in this document are based on the All copyrights reserved by RENAULT.
technical specifications in force when it was prepared.
Copying or translating, in part or in full, of this document or use of the service part
The methods may be modified as a result of changes introduced by the manufacturer reference numbering system is forbidden without the prior written authority of
in the production of the various component units and accessories from which their RENAULT.
vehicles are constructed."

© RENAULT 2003
 Contents

Page

13B DIESEL INJECTION

Introduction 13B-1
Diagnostic sheet 13B-7
Component replacement 13B-9
Configuration 13B-11
Summary of faults 13B-13
Interpretation of faults 13B-16
Conformity check 13B-92
State summary table 13B-106
Interpretation of states 13B-107
Summary table of available parameters 13B-122
Interpretation of parameters 13B-124
Summary table of commands 13B-128
Interpretation of commands 13B-129
Customer complaints 13B-152
Fault finding chart 13B-153
Glossary 13B-163
 113B
DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag no: 19
Fault finding - Introduction

1. SCOPE OF THIS DOCUMENT

This document presents the fault finding procedures applicable to all computers with the following characteristics:

Vehicle(s): Espace IV, Kangoo, Laguna II, Computer name: BOSCH EDC15C13
Vel Satis Program name: CB
Function involved: Diesel injection Drainage No: 19

2. PREREQUISITES FOR FAULT FINDING

Documentation type

Fault finding procedures (this manual):

– Assisted diagnostics (built into the fault finding tool), paper version (Workshop Repair Manual or
Technical Note) and Dialogys.

Wiring diagrams:
– Visu-Diagram (CD-ROM), paper.

Type of diagnostic tools:

– CLIP + CAN probe

Special tooling required:

Special tooling required

Multimeter
Elé. 1674 Clip + CAN probe

3. RECAP

Procedure:

To run diagnostics on the vehicle computers, switch on the ignition.

Connect the fault finding tool and perform the required operations.

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 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Drainage no: 19
Fault finding - Introduction

Faults

Faults are declared either present or stored (depending on whether they appeared in a certain context and have
disappeared since, or whether they remain present but have not been diagnosed within the current context).

Consider the fault status, present or stored when the fault finding tool is used after the + after ignition feed (without
operating the system components).

For a present fault, apply the procedure described in the Interpretation of faults section.

For a stored fault, note the faults displayed and apply the Notes section.

If the fault is confirmed when the Notes are applied, the fault is present. Deal with the fault

If the fault is not confirmed, check:

– the electrical lines which correspond to the fault,
– the connectors on these lines (corrosion, bent pins, etc.),
– the resistance of the faulty component,
– the condition of the wires (melted or cut insulation, wear).

Check conformity

The conformity check is designed to check the states and parameters which do not display any faults on the fault
finding tool when not operating consistently. Therefore, this phase allows:
– running of diagnostics on faults that do not have a fault display, and which may correspond to a
customer complaint.
– Checks to ensure that the system is operating correctly and that there is no risk of a fault reappearing
after repairs.

This section features the fault finding procedure for statuses and parameters, and the conditions for checking them.

If a state is not behaving normally or a parameter is outside permitted tolerance values, you should consult the
corresponding fault finding page.

Customer complaints - Fault finding chart

If the fault finding tool check is correct, but the customer complaint persists, it should be dealt with according to the
customer complaint.

A summary of the overall procedure to follow is provided in the form of a logic flow chart
in point 4

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 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Drainage no: 19
Fault finding - Introduction

WIRING HARNESS CHECK

Diagnostic problems

Disconnecting the connectors and/or handling the wiring harness can delete the incident.
Electrical measurements of voltage, resistance and insulation are generally correct, especially if the fault
is not present (stored) when doing the testing.

Visual inspection

Look for damage under the bonnet and in the passenger compartment.
Meticulously inspect the protective devices, insulation and path of the wiring harnesses.

Tactile inspection

While handling the wiring, use the fault-finding tool to detect any change in the state of stored or present
faults during the wiring harness inspection:
– make sure the connectors are firmly locked,
– apply light pressure to the connectors,
– twist the bundle.

If a change of state occurs, try to display the incident.

Inspection of each component

Disconnect the connectors and inspect the appearance of clips and tabs.

Make sure the clips and tabs are properly connected in the cells.

Check the contact pressure of the clips.

Resistance test

Look for a short circuit to earth at + 12 V or with another wire.

Measure continuity on the full line, then section by section.

If a fault is detected, repair or replace the wiring harness.

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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No.: CB
Drainage no: 19
Fault finding - Introduction

4. FAULT FINDING PROCEDURE

Check the battery charge and

condition of the fuses

Print the system diagnostic sheet

(available in CLIP or in the
Workshop Repair Manual or
Technical Note)

Connect CLIP

Communication no
with the Central See Fault finding chart 1
Processing Unit?

yes

Read faults

no
Faults present Conformity check

yes

Deal with faults found no

The symptom Fault
persists solved

Deal with stored faults

Use the Fault finding charts

no
The symptom Fault
persists solved
no
The symptom Fault
persists solved
yes

Contact Techline with the

completed diagnostic sheet

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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No: CB
Drainage no: 19
Fault finding - Introduction

5. DIAGNOSTIC SHEET

WARNING
Any incident involving a complex system must undergo a thorough fault finding procedure with
the appropriate tools. The DIAGNOSTIC SHEET, which should be completed during the
procedure, enables you to keep track of the procedure which is carried out. It is an essential
WARNING! component when consulting the manufacturer.

IT IS THEREFORE MANDATORY TO FILL OUT A DIAGNOSTIC SHEET FOR EACH FAULT FINDING
PROCEDURE.

You will always be asked for this sheet:

● When requesting technical assistance from the Techline.

● For approval requests when replacing parts for which approval is obligatory.

● To be enclosed when returning "monitored parts" on request. The sheet is needed for warranty
compensation, and enables better analysis of the parts,.which have been removed.

6. CLEANLINESS INSTRUCTIONS WHICH MUST BE FOLLOWED WHEN WORKING ON THE HIGH

PRESSURE DIRECT INJECTION SYSTEM

Risks relating to contamination

The system is highly sensitive to contamination. The risks caused by the introduction of contamination are:
– damage or destruction to the high pressure injection system and the engine,
– a component seizing or leaking.

All After Sales operations must be performed under very clean conditions. Performing an operation in a very clean
environment means that no impurities (particles only a few microns in size) will have been able to enter the system
during dismantling or into the circuits via the fuel unions.

The cleanliness guidelines must be applied from the filter through to the injectors.

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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No: CB
Drainage no: 19
Fault finding - Introduction

7. SAFETY INSTRUCTIONS

All work on components requires that the safety rules be obeyed to prevent damage or injury:
– Make sure the battery is properly charged to avoid damaging the computers with a low load.
– Use the appropriate tools.

What are the sources of contamination?

Contamination is caused by:

– metal or plastic chips,
– paint,
– fibres from: cardboard,
from brushes,
from paper,
from clothing,
cloths,
– foreign bodies such as hair,
– atmospheric environment,
– etc.

WARNING
It is not possible to clean the engine using a high-pressure washer because of the risk of damaging
connections. In addition, moisture may collect in the connectors and cause electrical connection faults.

Instructions to be followed before any work is carried out on the injection system:

Ensure that you have the caps for the unions to be opened (bag of plugs available from the Parts Department, part
no.: 77 01 206 804). Caps are to be used only once. They must be discarded after use (once used they are soiled
and cleaning is not sufficient to make them reusable). Unused caps must be thrown away.

Ensure that you have hermetically re-sealable plastic bags for storing removed parts. There is less risk of parts
stored in this way being exposed to contamination. These bags are single use; they must be discarded after use.

Make sure that lint-free towelettes are available (part number 77 11 211 707). The use of a normal cloth or paper for
cleaning purposes is prohibited. They are not lint-free and may contaminate the system fuel circuit. A lint-free cloth
should only be used once.

All work on components requires that the safety rules be obeyed to prevent damage or injury:
– Make sure the battery is properly charged to avoid damaging the computers with a low load.
– Use the appropriate tools.

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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No: CB
Drainage no: 19
Fault finding - Introduction

Instructions to be followed before opening of the fuel circuit

Use fresh thinner for each operation (used thinner is contaminated). Pour it into an uncontaminated receptacle.

For each operation, use a clean brush in good condition (the brush must not shed its bristles).

Use a brush and thinners to clean the unions which will be opened.

Blow compressed air over the cleaned parts (tools, workbench, and the parts, unions and injection system area).
Check that no bristles remain.

Wash your hands before and during the operation if necessary.

When wearing protective leather gloves, cover them with latex gloves.

Instructions to be followed during the operation

As soon as the circuit is open, all openings must be capped to prevent impurities from entering the system. The caps
to be used are available from the Parts Department. They must not be reused under any circumstances.

Close the resealable bag, even if it has to be reopened shortly afterwards. Ambient air carries impurities.

All components removed from the injection system must be stored in a hermetically sealed plastic bag once they
have been capped.

Using a brush, thinner, air gun, sponge or normal rag is strictly prohibited once the circuit has been opened. These
items are likely to allow impurities to enter the system.

If a component is being replaced, the new component must not be removed from its packaging until it is ready to be
fitted on the vehicle.

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 DIAGNOSTIC SHEET
System: Injection
Page 1 / 2
List of monitored parts: Computer
● Administrative identification

Date 2 0

Sheet completed by

VIN

Engine

Fault finding tool CLIP

Update version

● Customer complaints

579 Does not start - fault 570 Stalls - cold starting problems 571 Stalls - hot starting problems

586 Starting problems 572 Idling - engine speed 574 Bucking - gaps
unsteady

573 Lack of power 520 Abnormal noise, vibrations 576 Smoke - exhaust odours

569 Starting problems

Other Please specify:

● Conditions under which the customer complaint occurs

001 When cold 005 While driving 008 When decelerating

002 When warm 006 During gear selection 009 Sudden fault

003 When stationary 007 When accelerating 010 Gradual deterioration

004 Intermittently

Other Please specify:

● Documentation used in fault finding

Diagnostic method used

Type of diagnostic manual: Workshop Repair Manual Technical Note Assisted diagnostic

Diagnostic Manual No:

Wiring diagram used

Wiring Diagram Technical Note No:

Other documentation

Title and/or part number:

FD 01
Diagnostic Sheet

page to print or photocopy - page to print or photocopy - page to print or photocopy

 DIAGNOSTIC SHEET
System: Injection
Page 2 / 2

● Computer identification and system parts exchanged

Part 1 part no.

Part 2 part no.

Part 3 part no.

Part 4 part no.

Part 5 part no.

To be read with the fault finding tool (Identification screen):

Computer part no.

Supplier no.

Program no.

Software version

Calibration no.

VDIAG

● Faults found with the fault finding tool

Fault no. Present Stored Fault name Specification

● Conditions when fault occurs

Status or parameter no. Parameter name Value Unit

● System-specific information

Description:

● Additional information

What factors led you to replace the

computer?
What other parts were replaced?

Other faulty functions?

Please specify:

FD 01
Diagnostic Sheet

page to print or photocopy - page to print or photocopy - page to print or photocopy

 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag no: 19
Fault finding - System operation

The high-pressure injection system is designed to deliver a precise quantity of diesel fuel to the engine at a specific
time.

It is fitted with a 112-track BOSCH "EDC15" computer.

The system comprises:

– a priming bulb on the low pressure circuit,
– a diesel filter,
– a high pressure pump with a built-in low pressure pump (transfer pump),
– a high pressure regulator mounted on the pump,
– an injector rail,
– a diesel fuel pressure sensor built into the rail,
– four solenoid injectors,
– a diesel fuel temperature sensor,
– a coolant temperature sensor,
– an upstream air temperature sensor,
– a cylinder reference sensor,
– an engine speed sensor,
– a turbocharging pressure sensor,
– an EGR solenoid valve,
– an accelerator pedal potentiometer,
– an atmospheric pressure sensor built into the injection computer,
– a flowmeter,
– a turbocharging limitation solenoid valve,
– a damper flap solenoid valve.

The "common rail" direct high pressure injection system works sequentially (based on the petrol engine multipoint
injection).

This new injection system reduces operating noise, lowers the volume of pollutant gases and particles and produces
high engine torque at low engine speeds thanks to a pre-injection procedure.

The high pressure pump generates the high pressure and transmits it to the injector rail. The actuator located on the
pump controls the quantity of diesel fuel supplied, according to the demand determined by the computer. The rail
supplies each injector through a steel pipe.

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 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - System operation

Computer

This determines the injection pressure value necessary for the engine to operate correctly and controls the pressure
regulator accordingly. It checks that the pressure value is correct by analysing the value transmitted by the pressure
sensor located on the rail.
It determines the necessary injection timing to deliver the right quantity of diesel fuel and the moment when injection
should start.
It electrically controls each injector individually after determining these two values.

The flow injected into the engine is determined by:

– the duration of injector control,
– the rail pressure (regulated by the computer),
– the needle stroke (determined by a constant for the type of injector),
– the nominal hydraulic flow of the injector (specific to each injector).

The computer manages:

– idling regulation,
– exhaust fumes flow reinjection to the inlet,
– fuel supply monitoring (advance, flow and rail pressure),
– the fan assembly control,
– air conditioning (cold loop function),
– the power supply and control of passenger compartment heating resistors (RCH),
– the cruise control/speed limiter function,
– postheating control,
– fault warning lights via the multiplex network.

The high pressure pump is supplied at low pressure by a built-in low pressure pump (transfer pump).
It supplies the rail, whose pressure is controlled by the fuel flow actuator for charging, and by the injector valves for
discharging. This can compensate for pressure drops. The fuel flow actuator enables the high pressure pump to
supply the exact quantity of diesel fuel required to maintain the rail pressure. This component minimises the heat
generated and improves engine output.
To discharge the rail using the injector valves, the valves are controlled by brief electrical pulses which are:
– short enough not to open the injector (passing through the feedback circuit from the injectors),
– long enough to open the valves and discharge the rail.

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 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - System operation

Renault vehicles are equipped with multiplex electronic systems. This allows dialogue between the various
computers in the vehicle. As a result:
– the fault warning lights on the instrument panel are activated via the multiplex network,
– there is no vehicle speed sensor in the gearbox,
– the vehicle speed signal on the instrument panel is transmitted by the ABS computer to the injection
computer via a wire connection and is then transmitted over the multiplex network by the instrument
panel,
– the vehicle speed signal is used mainly by the injection computer and the air bag computer.

Some vehicles have adopted a sensor for detecting water in the diesel fuel, located in the filter. If there is water
present in the diesel fuel, the injection and pre-/postheating fault warning light comes on.

IMPORTANT
The engine must not operate with:
– Diesel fuel containing more than 10 % diester.
– Petrol, even in tiny quantities.

The system can inject the diesel fuel into the engine at a pressure of up to 1350 bar. Before each operation, check
that the injector rail is depressurised and that the fuel temperature is not too high.

You must respect the cleaning and safety advice specified in this document for any work on the high pressure
injection system.

Dismantling the interior of the pump and injectors is forbidden. Only the fuel flow actuator, the diesel fuel
temperature sensor and the venturi can be replaced.

For safety reasons, it is strictly forbidden to undo a high pressure pipe union when the engine is running.

It is not possible to remove the pressure sensor from the fuel rail because this may cause circuit contamination
problems. If the pressure sensor fails, the pressure sensor, the rail and the five high pressure pipes must be
replaced.

It is strictly forbidden to remove any injection pump pulley marked number 070 575. If the pump is replaced, the
pulley must be replaced.

Supplying + 12 V directly to any component of the system is prohibited.

Ultrasonic decoking and cleaning are prohibited.

Never start the engine unless the battery is connected correctly.

Disconnect the injection computer when carrying out any welding work on the vehicle.

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 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - System operation

Cold loop air conditioning management

The air conditioning system is of the cold loop type. The injection computer is responsible for:
– Authorising cold requests according to the refrigerant pressure, the engine coolant temperature and
the engine speed,
– Requesting activation of the fan assembly according to the vehicle speed, the refrigerant pressure
and the engine coolant temperature.

The air conditioning system is enabled by the injection computer 2 to 8 seconds after engine start.

Compressor switch-on is inhibited in the following conditions.

Engine speed Vehicle speed Accelerator pedal unit

less than 3000 ± 100 rpm less than 110 ± 2 kph major change of position (rapid variation)

less than 2250 ± 100 rpm less than 20 ± 3 kph greater than 46 ± 2 %

less than 675 ± 50 rpm ... throttle closure

Cruise control management

When activated, the cruise control function maintains the vehicle at a preselected speed, regardless of the driving
conditions encountered. Using the control buttons, the driver can increase or decrease the vehicle speed.

The cruise control function can be deactivated either using the control buttons, or by switching off the cruise control
function selection switch or when system events are detected (such as the brake or clutch pedal being pressed), or
when system errors are detected such as an inconsistent vehicle speed or excessive vehicle deceleration.

The cruise control function can also be temporarily suspended when the driver wants to resume control of the
vehicle and exceed the selected cruising speed by pressing the accelerator pedal which then exceeds the selected
fuel flow. The cruising speed is resumed when the driver releases the accelerator pedal.
It is possible to reactivate cruise control and to return to the last cruising speed after the function has been deactivated
for whatever reason, during the same cycle of use (computer supply voltage not cut). The vehicle will then attempt to
reach the cruising speed at a controlled acceleration rate.

The driver has the following controls to operate the cruise control function:
– Accelerator pedal.
– Brake pedal.
– Clutch pedal.
– Function selection switch to select the cruise control operating mode.
– Instrument panel controls.

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 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - System operation

Warning light management

– Instrument panel display

The computer manages the data display on the instrument panel relating to engine operation. This
concerns 5 functions: MIL (Malfunction Indicator Lamp) for the EOBD (European On Board Diagnostic),
pre/postheating, coolant temperature and engine faults: Severity 1 (non-critical fault) and Severity 2
(emergency stop). These five functions are represented by 3 warning lights or messages displayed by
the on-board computer.

– Pre/postheating warning light

This warning light is used both as an in operation indicator lamp and as a system fault indicator:
– Continuously lit under + after ignition feed: indicates preheating of the spark plugs.
– Continuously lit, with the "injection faulty" message: indicates a Level 1 fault (entailing degraded
operation and a limited safety level. The user must carry out repairs as soon as possible).

– Temperature/emergency stop warning light

This in operation indicator lamp is used both as an in operation indicator light and as a system fault
indicator light. It lights up for 3 seconds when the ignition is switched on (automatic test procedure
managed by the instrument panel):
– Continuously lit: indicates engine overheating (the driver remains free to stop the vehicle or not).
– Continuously lit, with the "Engine stop" message: indicates a level 2 fault (In this case, injection is
automatically shut off after a few seconds).

– Excess pollution "OBD" orange warning light

Symbolised by an engine, it lights up for approximately 3 seconds when the engine is switched on. This
warning light can also light up when driving if the system detects an OBD fault.

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 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Allocation of computer tracks

Connector A, 32 tracks Connector B, 48 tracks

Track Description Track Description

A1 CAN H network signal (passenger A1 + After ignition supply
compartment)
A2 Air flowmeter feed
A2 Vehicle speed input
A3 Air flowmeter signal (F9 engine)
A3 Software lock input
A4 Flowmeter earth (F9 engine)
A4 Open stop contact input
B1 Not used
B1 CAN L network signal (passenger
B2 Turbocharging pressure sensor supply
compartment)
B3 Turbocharging pressure sensor signal
B2 Cruise control switch input
B4 Turbocharging pressure sensor earth
B3 Power absorbed input - water present in
diesel fuel C1 Engine speed sensor signal
B4 Stop contact closed input C2 Rail pressure sensor supply
C1 Load potentiometer 2 earth C3 Rail pressure sensor signal
C2 Load potentiometer 2 signal C4 Rail pressure sensor earth
C3 Windscreen de-icer signal D1 Engine speed sensor signal
C4 Clutch contact input D2 EGR position potentiometer feed
D1 Load potentiometer 1 earth D3 EGR position potentiometer signal
D2 Load potentiometer 1 signal D4 EGR position potentiometer earth
D3 Air conditioning recirculation input E1 Not used
D4 Not used E2 Freon pressure sensor supply
E1 Fuel consumption output E3 Freon pressure sensor signal
E2 Not used E4 Freon pressure sensor earth
E3 Load potentiometer 2 power supply F1 Main power supply relay control
E4 Not used F2 Not used
F1 Engine speed signal F3 Coolant temperature sensor signal
F2 Diagnostic line K F4 Coolant temperature sensor earth
F3 Load potentiometer 1 power supply G1 Preheating relay control
F4 Cruise control switch earth G2 Not used
G1 Heating resistor control relay n˚3 G3 Fuel temperature sensor signal
G2 High speed fan assembly relay control G4 Fuel temperature sensor earth
G3 Air conditioning inhibit output
G4 Not used
H1 Heating resistor control relay n˚1
H2 Low speed fan assembly relay control
H3 Not used
H4 Not used
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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Allocation of computer tracks

48 track brown connector B (continued) 32 track grey connector C

Track Description Track Description

H1 Heating resistor control relay n˚2 A1 Not used
H2 Spark plug set 1 diagnostic A2 Not used
H3 Air temperature sensor signal A3 Camshaft sensor signal
H4 Not used A4 Coolant temperature warning output
J1 CAN H network signal (engine) B1 Not used
J2 Not used B2 Not used
J3 Not used B3 Camshaft sensor earth
J4 Not used B4 Preheating indicator light output
K1 CAN L network signal (engine) C1 Fuel pump relay control
K2 Not used C2 Not used
K3 Not used C3 Not used
K4 Not used C4 Not used
L1 Fuel flow actuator control D1 Not used
L2 Turbocharging pressure regulator control D2 Not used
L3 Power 1 earth D3 Not used
L4 Power 3 earth D4 Injection warning light output
M1 EGR solenoid valve control E1 Not used
M2 + battery 1 after relay E2 Not used
M3 + battery 2 after relay E3 Not used
M4 Power earth 2 E4 Not used
F1 Not used
F2 Not used
F3 Not used
F4 Not used
G1 Injector 1 feed
G2 Injector 3 feed
G3 Injector command 1
G4 Injector command 3
H1 Injector 4 feed
H2 Injector 2 feed
H3 Injector command 4
H4 Injector command 2

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 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Replacing components

COMPUTER REPLACEMENT OR REPROGRAMMING

Two steps have to be taken when replacing or reprogramming the computer: SC005 and SC007.
– SC005 is used before replacing or reprogramming the computer. It allows certain information to be saved
in the fault finding tool so that the new computer* can be reconfigured to match the old computer. The data
saved is: injector codes, EGR programming, vehicle options and correction of idling speed.
– SC007 is used before replacing or reprogramming the computer*. It enables you to rewrite data (saved by
command SC005) to the new computer*.
If it is not possible to enter into dialogue with the computer being replaced: then saving the configurations will
not be possible. After replacing the computer, reconfigure it manually using the dedicated commands according to its
features, or its set up.

CF014, CF015: air conditioning option,

CF005, CF006: thermoplunger option,

CF589, CF590: boiler option,

VP028, VP029: Adjustment of specific idling speed "Commercial vehicle"

Exhaust gas recirculation valve data is programmed automatically the 1st time the new computer is switched on*.

* new computer or exiting reprogramming!

PROCEDURE

● Before replacing or reprogramming the computer:

– Select the "COMMAND" menu then "SPECIFIC COMMAND",
– Select "SC005: SAVE DATA FOR COMPUTER REPLACEMENT",
– If the following message appears: "a saved file exists. Do you want to overwrite these values?":

(this file corresponds to the last save carried out on the tool)

Select "YES",

When the save has been performed, replace the computer or carry out the programming then proceed to
the next step.

● After replacing or reprogramming the computer:

Select the "COMMAND" menu then "SPECIFIC COMMAND"

Select SC007 "ENTER DATA AFTER REPLACING THE COMPUTER"

Follow the instructions.

When the command is finished, switch off the engine,

Wait for the engine immobiliser indicator light to flash and switch on the ignition again,

Set up communications and clear the fault memory

End of the procedure

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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Replacing components

REPLACING THE EXHAUST GAS RECIRCULATION (EGR valve)

From Vdiag 14, the fault monitoring strategy on the exhaust gas recirculation valve has been altered. To perform this
function, the computer has to store the offset of the new valve (at 0 miles/kilometres) as well as the offset measured
the last time the ignition was switched off (during the power latch phase*). Using these data, the computer can
detect whether the valve is clogged or stuck.

When the valve is replaced, the offsets in memory have to be deleted so that the programming uses the new valve's
offset value.

The data associated with this programming is combined under the "EGR PROGRAMMING" function:
– ET225: PROGRAMMING FIRST EGR OFFSET EGR = Done or not done
– PR583: NEW EGR VALVE OFFSET = 0.75 V < x < 1.6 V (dispersion at manufacture)
– PR584: LAST EGR VALVE OFFSET > or = PR583
– PR088: RECOPY EGR VALVE POSITION: (very close to PR584

Values PR583 and PR584 must be erased every time the exhaust gas recirculation valve is replaced.

Procedure to be followed after replacing the exhaust gas recirculation valve:

Select the "CLEAR" menu.

Note:
When the command is completed, the EGR PROGRAMMING function displays:
ET225: not done PR583 and PR584 = 0.00 V PR088 = 0.75 V < x < 1.6 V

When the command has been carried out, switch off the ignition.

Wait for the end of the power latch*.

The offset is automatically reinitialised the next time the ignition is switched on.

Note:
When initialisation is complete, the "EGR PROGRAMMING" function displays:
ET225: done 0.75 V < PR583 = PR584 = PR088 < 1.6 V

End of the procedure.

* engine immobiliser light flashes for a few seconds after the ignition is switched off.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-18
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Configurations

Summary of available configurations

The configurations are performed to configure the vehicle computer according to the
NOTES
options available on the vehicle.

CF571: Idling speed incrementation

This configuration is used to increase the engine's idling speed by + 50 rpm maximum, in steps of
+ 10 rpm.

CF572: Idling speed decrementation

This configuration is used to decrease the engine's idling speed by - 50 rpm maximum, in steps of
- 10 rpm

WARNING
This configuration can lead to customer complaints if badly used.
WARNING!

CF015: Without air conditioning

This configuration is used to configure the computer for a vehicle not fitted with air conditioning.

CF014: With air conditioning

This configuration is used to configure the computer for a vehicle which is equipped with air
conditioning.

CF006: Without thermoplungers.

This configuration is used to configure the computer for a vehicle not fitted with thermoplungers.

CF005: With thermoplungers

This configuration is used to configure the computer for a vehicle which is equipped with
thermoplungers.

AFTER REPAIR Repeat the conformity check from the start.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-19
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Configurations

Summary of available configuration readings

NOTES Configuration readings are used to check the state of configurations performed.

LC002: Air conditioning

WITH OR WITHOUT
This reading configuration is directly linked to the configurations CF014 and CF015.

LC019: Thermoplunger options

WITH OR WITHOUT
This reading configuration is directly linked to the configurations CF006 and CF005.

LC008: Number of cylinders

This configuration reading indicates the number of engine cylinders.

LC023: EGR type

WITH OR WITHOUT
This configuration reading indicates whether the vehicle is fitted with an exhaust gas recirculation
circuit.

LC009: Intake type

This configuration reading indicates whether the vehicle is fitted with a turbocharger.

LC017: Injection type

DIRECT OR INDIRECT
This configuration reading indicates whether the vehicle is fitted with direct or indirect injection.

LC005: Type of gearbox

Manual gearbox or automatic transmission
This configuration reading indicates whether the vehicle is fitted with a manual gearbox or automatic
transmission.

LC040: High pressure pump

This configuration reading indicates the type of injection pump fitted on the vehicle.

LC041: IMA programming

WITH OR WITHOUT
This configuration reading indicates whether the engine is fitted with an electronic injector flow
correction system.

LC043: Specific idling speed commercial vehicle

WITH OR WITHOUT
This configuration reading indicates whether or not the vehicle has a specific idling speed. This idling
speed is specific to commercial vehicles.

AFTER REPAIR Repeat the conformity check from the start.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-20
 EDC15C13
DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Summary table of faults 13B
WARNING LIGHT MANAGEMENT
Management of instrument panel warning lights according to the faults notified.

Level 1 fault
Level 2 Fault
DTC codes warning light
warning light (red No warning
Faults in (Orange
overheating light
hexadecimal preheating
warning light)
warning light)

DF002 Coolant temperature CC.O/CO.1/

1801 - -
circuit 1.DEF

DF012 Battery voltage 182A - - 1.DEF/2.DEF

DF015 Engine immobliser 183E 1.DEF/2.DEF - -

DF019 Air flowmeter sensor CC.O/CC.1/

1806 1.DEF -
circuit 2.DEF

DF021 Fuel temperature sensor

1805 - - CC.O/CO.1
circuit

DF022 Air temperature sensor

1802 - - CC.O/CO.1
circuit

DF044 Reversing signal 1887 - - 1.DEF

DF048 Low-speed fan assembly

1817 - - CC.1/CO.0
circuit

DF061 Heater plug circuit 1826 - - 1.DEF

DF067 Pressure sensor circuit 1809 - CC.0/CO.1/1.DEF -

DF070 Camshaft sensor /

1808 3.DEF/4.DEF 2.DEF 1.DEF
engine speed consistency

DF071 Pedal sensor circuit

180A CC.0/CC.1/1.DEF - -
track 1

1.DEF/2.DEF/
DF072 Pressure signal 1882 - 3.DEF/4.DEF/ -
5.DEF

DF073 Pedal sensor circuit CC.0/CC.1/1.DEF/

180B - -
track 2 2.DEF
DF074 Turbocharging pressure CC.0/CC.1/1.DEF/
1804 - -
sensor 2.DEF

DF075 Atmospheric pressure

1803 - - 1.DEF/2.DEF
sensor

DF077 EGR valve 1814 2.DEF - CC.1/CO.0

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-21
 EDC15C13
DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Summary table of faults 13B
WARNING LIGHT MANAGEMENT
Management of instrument panel warning lights according to the faults notified.

Level 1 Fault
Level 2 Fault
DTC codes warning light
warning light (red No warning
Faults in (Orange
overheating light
hexadecimal preheating
warning light)
warning light)

DF079 Heating element relay

1836 - - CC.1/CO.0
n˚3

DF081 Preheating relay circuit 1816 - - CC.1/CO.1

DF082 Low pressure pump

1820 - - CC.1/CO.0
relay circuit

DF083 Pressure solenoid valve

1822 - CC.1/CO.0 1.DEF
circuit

DF084 EGR valve position 1.DEF/2.DEF/ CO.0/CC.1/

180C -
sensor circuit 3.DEF 4.DEF

DF088 Flywheel signal

1807 - - 1.DEF
information consistency

DF091 Sensor supply voltage

183F 1.DEF/2.DEF - -
n˚1

DF092 Sensor supply voltage

1810 1.DEF/2.DEF - -
n˚2

DF094 Heating element relay

1834 - - CC.1/CO.0
n˚1

1.DEF/2.DEF/
DF095 Vehicle speed signal 1811 - -
3.DEF

DF097 Clutch contact signal 1829 - - 1.DEF

DF098 Main relay 1813 1.DEF/2.DEF - -

DF099 Cylinder injector circuit 1 182E 1.DEF 2.DEF -

DF100 Cylinder injector circuit 2 182F 1.DEF 2.DEF -

DF101 Cylinder injector circuit 3 1830 1.DEF 2.DEF -

DF102 Cylinder injector circuit 4 1831 1.DEF 2.DEF -

DF104 Heating element relay
1835 - - CC.1/CO.0
n˚2

DF106 Ìntake flap circuit 1889 CO.0 - CC.1

DF107 Swirl flap 1824 1.DEF/CO.0 - CC.1

DF108 Brake signal 1828 - - 1.DEF

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-22
 EDC15C13
DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Summary table of faults 13B
WARNING LIGHT MANAGEMENT
Management of instrument panel warning lights according to the faults notified.

Level 1 Fault
Level 2 Fault
DTC codes warning light
warning light (red No warning
Faults in (Orange
overheating light
hexadecimal preheating
warning light)
warning light)

DF113 Refrigerant sensor circuit 181A 3.DEF - 1.DEF/2.DEF

DF118 Speed limiter regulator

- - - -
function

DF141 Flow at self-test after

183A - - 1.DEF
ignition switched off

DF173 Injector code

188B 1.DEF / 2.DEF - -
programming

DF175 Computer 183F 1.DEF - -

DF176 Computer 1886 - 1.DEF/2.DEF -

DF177 Computer 1880 1.DEF - -

DF178 Computer 1885 - 1.DEF/2.DEF -

DF179 Computer 1888 - 1.DEF/2.DEF -

DF180 Computer 182B 1.DEF - -

DF196 Water in diesel fuel

188C 1.DEF - -
sensor

1.DEF / 2.DEF
DF204 Misfiring 183B - -
3.DEF / 4.DEF

CC.1/CO.0/1.DEF
DF205 Air intake circuit 1815 - -
2.DEF

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-23
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF002 COOLANT TEMPERATURE SENSOR CIRCUIT

PRESENT CC.0 : Short circuit to earth
OR CO.1 : Open circuit or short circuit to + 12 V
STORED 1.DEF : Coolant operating temperature not attained

Conditions for applying fault finding to a stored fault for CC.0 and CO.1:
If the fault is declared present after:
– the fault has been cleared and a 1 minute delay with the engine running.

NOTES Special notes:

Use Elé. 1613 bornier for all operations on the engine management computer
connectors.
Measure the actual temperature and compare it with the temperature reading on the
tool.

CC.0 NOTES None.

Check the coolant temperature sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Measure the resistance of the coolant temperature sensor between terminals 2 and 3 of the connector.
Replace the sensor if the resistance is not: 2252 Ω ± 112 at 25°°C
811 Ω ± 39 at 50°°C
283 Ω ± 8 at 80°°C

Check the insulation against earth of the connection between:

Engine management computer connector B track F3 track 3.of the coolant temperature sensor
connector (G9T G9U)
track 2 of the coolant temperature sensor
connector (F9Q)
Check the continuity of the connection between:
Engine management computer, connector B track F4 track 2 of the coolant temperature sensor
connector (G9T G9U)
track 3 of the coolant temperature sensor
connector (F9Q)

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-24
 EDC15C13
DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF002

CONTINUED 1

CO.1 NOTES None.

Check the coolant temperature sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Measure the resistance of the coolant temperature sensor between terminals 2 and 3 of the connector.
Replace the sensor if the resistance is not: 2252 Ω ± 112 at 25 °C
811 Ω ± 39 at 50 °C
283 Ω ± 8 at 80 °C

Check the continuity and insulation of the following connections against + 12 volts:
Engine management computer, connector B track F4 track 2 of the coolant temperature
sensor connector (G9T G9U)
track 3 of the coolant temperature
sensor connector (F9Q)
Engine management computer, connector B track F3 track 3 of the coolant temperature
sensor connector (G9T G9U)
track 2 of the coolant temperature
sensor connector (F9Q)

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-25
 EDC15C13
DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF002

CONTINUED 2

Conditions for applying the fault finding procedure to

the stored fault:
If the fault is declared present after:
– engine start,
1.DEF NOTES
– a 4 minute delay when the engine has been running.

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

Check the coolant temperature sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Measure the resistance of the coolant temperature sensor between terminals 2 and 3 of the connector.
Replace the sensor if the resistance is not: 2252 Ω ± 112 at 25 °C
811 Ω ± 39 at 50°°C
283 Ω ± 8 at 80°°C

G9T - G9U engine:

Check the insulation against earth of the connection between:
Engine management computer, connector B track F3 track 3 coolant temperature sensor
connector
Check for the insulation against + 12 V of the connection between:
Engine management computer, connector B track F4 track 2 coolant temperature sensor
connector
Check the continuity and absence of interference resistance on the following connections:
Engine management computer, connector B track F4 track 2 coolant temperature sensor
connector
Engine management computer, connector B track F3 track 3 coolant temperature sensor
connector
Carry out the necessary operations if the resistance is abnormally high.
F9Q engine:
Check the insulation against earth of the connection between:
Engine management computer, connector B track F3 track 2 coolant temperature sensor
connector
Check the insulation against + 12 V of the connection between:
Engine management computer, connector B track F4 track 3 coolant temperature sensor
connector
Check the continuity and absence of interference resistance on the following connections:
Engine management computer, connector B track F4 track 2 coolant temperature sensor
connector
Engine management computer, connector B track F3 track 3 coolant temperature sensor
connector
Carry out the necessary operations if the resistance is abnormally high.

If the fault persists, check that the thermostat is working properly.

Check that the cooling circuit is correctly filled and sealed.
If necessary, refer to the Workshop Repair Manual section 19A.
Carry out the necessary repairs.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-26
 EDC15C13
DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF012 BATTERY VOLTAGE
PRESENT 1.DEF : Voltage too low
OR 2.DEF : Voltage too high
STORED

Conditions for applying the fault finding procedure to stored faults:

If the fault is declared present after:
– starting the engine,
– a 30 second delay with the engine running.
NOTES
Special notes:
If necessary, carry out a complete check of the charging circuit, referring to the
Technical Note "Charge circuit fault finding".

1.DEF NOTES None.

Reminder on computer operating voltage: 6 V < operating voltage < 16.5 V.

– Using a voltmeter, take a reading of the battery voltage at its terminals.

– Then compare it with the value displayed by your fault finding tool in the "parameter" menu
PR004 "Computer supply voltage"
If there is no difference:
Recharge and test the battery and replace it if it is faulty.
Next check the charge circuit.
If there is a difference:
– Check the tightness and the condition of the battery terminals.
– Using the appropriate wiring diagram:
– Check the following connections for continuity and make sure there is no interference suppresser:
+ 12 V battery tracks M2 and M3, connector B of the engine management computer (via the
engine fuse then the normally open contact of the power supply to the central
injection unit),
Battery earth tracks L3, L4, M4 of connector B of the engine management computer.
Carry out the necessary repairs.

2.DEF NOTES None.

Check the charge circuit.

Carry out the necessary repairs.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-27
 EDC15C13 DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF015 ENGINE IMMOBILISER
PRESENT 1.DEF : Fault on the connection
OR 2.DEF : Internal electrical fault
STORED

Conditions for applying the fault finding procedure to stored faults:

NOTES
Apply the fault finding strategy whether the fault is present or stored.

Not applicable to vehicles with engine immobiliser via a

multiplexed network.
1.DEF NOTES This fault appears when there is an open circuit on the
engine immobiliser line with the engine running.
Carefully check all the wiring linked to this connection.

Check the decoder unit or UCH connections.

Check the connectors on the engine management computer.
Repair if necessary.

Using the corresponding wiring diagram, check the continuity and the absence of interference suppresser
on the connection between:
Engine management computer, connector A track A3 track 6 decoder electronic unit
connector.
Also ensure it is insulated against + 12 volts and against earth (connectors disconnected).
Ensure the supply to the decoder unit:

2.DEF NOTES None.

Display state "ET110": code programmed.

If the state is: "NO": check the immobiliser function and start again from the beginning.
If the status is: "YES": erase the fault from the computer memory.
Switch off the ignition, then switch it on again to initialise the computer.
If the fault recurs, contact your Techline.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-28
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

AIR FLOW SENSOR CIRCUIT

DF019
PRESENT CO.0 : Open circuit or short circuit to earth
OR CC.1 : Short circuit to + 12 V
STORED 1.DEF : Sensor supply fault
2.DEF : Inconsistent signal

Conditions for applying the fault finding procedure to stored faults:

If the fault is declared present following:
– ignition off until the end of the power latch phase*,
– ignition on,
or
– engine start,
– a rise in temperature at idle speed in excess of 60˚C,
NOTES – the engine has been running at idle speed for a delay of 1 minute.

Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

WARNING: "Compressed air" may not be used to clean the air flow sensor. This might
damage the component which is used to measure air flow.

Priorities when dealing with a number of faults:

In the event of the simultaneous presence of fault "DF022:
CO.0 NOTES
Air temperature sensor circuit CO.1", make sure that the
air flow sensor connector is properly connected.

Check the air flow sensor connectors. Check the connectors on the engine management computer. Repair if
necessary.

Check the continuity and insulation against earth of the connection between:
Engine management computer, connector B track A3 track 5 of the air flow sensor
connector
Check that a supply of + 5 volts is present on track 3 of the air flowmeter sensor connector.
Check the following insulation:
– across tracks 5 and 6 of the air-flow-sensor connector,
– across tracks 2 and 5 of the air-flow-sensor connector.
Carry out the necessary repairs.

With the flowmeter connected, the vehicle ignition on and engine stopped:
Check the voltage between tracks 2 and 5 of the air flowmeter sensor,
– If the voltage is not 0.6 V ± 0.1, replace the air flow sensor.

Remove the air flowmeter.

– Check that there are no foreign bodies on the air flowmeter grille (visual check only).
If not, replace the air flow sensor.

* the immobiliser warning light will flash for a few seconds after switching off the ignition.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-29
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF019

CONTINUED 1

CC.1 NOTES None.

Check the air flow sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.
Check for the insulation against + 12 V of the connection between:
Engine management computer, connector B track A3 track 5 air flow sensor
connector
Check the continuity of the following connection:
Engine management computer, connector B track A4 track 2 of the air flow sensor
connector
If the fault persists, replace the air flowmeter.

Priorities when dealing with a number of faults:

1.DEF NOTES Deal with the DF091: "Sensor feed voltage no. 1" fault as
a priority if it is present or stored.

Check the air flow sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check the insulation and continuity of the connection between:

Engine management computer, connector B track A2 track 3 air flow sensor
connector

Check the following insulation:

– between tracks 3 and 6 of the air flow sensor connector,
– between tracks 3 and 2 of the air flow sensor connector,
– between tracks 3 and 4 of the air flow sensor connector.

Check for the presence of + 12 V "after relay" on track 4 of the air flow sensor connector.
Check the presence of the following earths:
Electronic (coming from the electronic unit) on track 2 of the air flow sensor
connector
Chassis (body) on track 6 of the air flow sensor
connector
If the fault persists, replace the air flow sensor.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-30
 EDC15C13
DIESEL INJECTION SYSTEM
13B
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF019

CONTINUED 2

2.DEF NOTES None.

Check the air flow sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check the continuity and insulation of the connections between:

Engine management computer, connector B track A2 track 3 air flow sensor
connector
Engine management computer, connector B track A3 track 5 air-flow-sensor
connector

Check for the presence of + 12 V "after relay" on track 4 of the air flow sensor connector.
Check for the presence of an earth on track 6 of the air flow sensor connector.

● Check the entire air intake circuit:

– Air filter box inlet not blocked and filter not clogged,
– No foreign bodies on the air flow sensor grille (visual check only).
If not, replace the air flow sensor.
– Oil vapour recirculation circuit connection conformity.
– Low and high pressure air circuit sealed and not obstructed: Pipes, mounting clamps present and
tightened, turbocharging pressure sensor fitted, exchanger etc.
– Check that the intake flap is open (flap control rests on the body of the air vent unit)
– Check that the swirl flap is in the rest position (AC594, "Swirl flap" step 2),

● With the flowmeter connected, the vehicle ignition on and engine stopped:
– Check the voltage between tracks 2 and 5 of the air flow sensor:
If the value is not 0.6 V ± 0.1, replace the air flow sensor

● Check that the exhaust gas recirculation valve is not stuck open:
– Switch off the ignition, disconnect the connector and remove the exhaust gas recirculation valve:
– If removal reveals that the valve is blocked open, replace the exhaust gas recirculation valve.
– Otherwise, with the valve removed and connected, establish communication with the tool and run the valve
via the command AC007 "EGR valve"
Check: valve displacement in relation to the Opening Cycle Ratio (OCR) (0 to 2.5 mm stroke for an OCR of
25 % and 6 to 7 mm for an OCR of 75 %).
Closing when the command is completed.
If this check shows that the valve is stuck or seized beyond repair, replace the exhaust gas recirculation valve.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-31
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF021 FUEL TEMPERATURE SENSOR CIRCUIT

PRESENT CC.0 : Short circuit to earth
OR CO.1 : Open circuit or short circuit to + 12 V
STORED

Conditions for applying the fault finding procedure to stored faults:

If the fault is declared present after:
– the engine has been running for 2 minutes.
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

CC.0 NOTES None.

Check the fuel temperature sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check the insulation against earth of the connection between:

Engine management computer, connector B track G3 track 1 fuel temperature sensor
connector
Measure the resistance of the fuel temperature sensor between tracks 1 and 2:
Replace the sensor if the resistance is not: 3820 Ω ± 282 at 10°°C
2050 Ω ± 100 at 25°°C
810 Ω ± 47 at 50°°C

CO.1 NOTES None.

Check the fuel temperature sensor connectors.

Check the computer connectors.
Repair if necessary.

Measure the resistance of the fuel temperature sensor between tracks 1 and 2:
Replace the sensor if the resistance is not: 3820 Ω ± 282 at 10°°C
2050 Ω ± 100 at 25°°C
810 Ω ± 47 at 50°°C
Check the continuity and insulation of the following connections against + 12 volts:
Engine management computer, connector B track G3 track 1 fuel temperature sensor
connector
Engine management computer, connector B track G4 track 2 fuel temperature sensor
connector

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger Vehicle Version 1.0

13B-32
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF022 AIR TEMPERATURE SENSOR CIRCUIT

PRESENT CC.0 : Short circuit to earth
OR CO.1 : Open circuit or short circuit to + 12 V
STORED

Conditions for applying the fault finding procedure to stored faults:

If the fault is declared present after:
– the engine has been running for 2 minutes.
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

CC.0 NOTES None.

Check the air flow sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

With the air flowmeter disconnected, check the insulation against earth of the connection between:
Engine management computer, connector B track H3 track 1 of the air flow sensor connector
Check for the presence of + 5 V on track 3 of the air flowmeter connector.

Measure the resistance of the air temperature sensor between tracks 1 and 2 of the air flow sensor:
Replace the air flowmeter if the resistance is not approximately: 3714 Ω ± 161 at 10°°C
2448 Ω ± 90 at 20°°C
1671 Ω ± 59 at 30°°C

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-33
 EDC15C13
DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF022

CONTINUED

Priorities when dealing with a number of faults:

In the event of the simultaneous presence of fault DF019:
CO.1 NOTES
Air flow "sensor circuit" CO.0, make sure that the air flow
sensor connector is properly connected.

Check the air flow sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check the continuity and insulation of the following connections against + 12 volts:
Engine management computer, connector B tracks H3 track 1 air flow sensor
connector
Engine management computer, connector B tracks A4 track 2 air flow sensor
connector

Measure the resistance of the air temperature sensor between tracks 1 and 2 of the air flow sensor:
Replace the air flow sensor if the resistance is not approximately: 3714 Ω ± 161 at 10 °C
2448 Ω ± 90 at 20 °C
1671 Ω ± 59 at 30 °C

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-34
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults
4x4

DF044 REVERSE GEAR SIGNAL

PRESENT 1.DEF : Inconsistency
OR
STORED

Conditions for applying the fault finding procedure to the stored fault:
If the fault is declared present after:
– a road test in reverse gear.
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

1.DEF NOTES None.

With the engine running, check that the state ET035 "Reversing signal" becomes "PRESENT" when the car
is put into reverse and "ABSENT" when the gear lever returns to neutral or is in a "forward" gear (also check
the illumination and extinction of the reversing lights).
If these checks work, clear the fault and exit the fault finding procedure.

● If the change from reversing to neutral or a forward gear does not change the state ET035 "Reversing
signal":
Check the connectors on the reverse gear switch. Repair if necessary.
Check the computer connectors. Repair if necessary.

● Check the continuity of the following connection:

Engine management computer, connector B track K2 track 2 of the reversing light
switch

● Also check the insulation of this connection against the earth and against + 12 volts.

● Check for the presence of supply on track 1 of the reverse light switch connector (via fuse "F14" (25A))

●Check that the reversing switch is functioning by using an ohmmeter:

Insulation between tracks 1 and 2 when reverse gear is not engaged.
Continuity between tracks 1 and 2 when reverse gear is engaged.
Replace the switch if necessary.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-35
 EDC15C13
DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF048 LOW-SPEED FAN ASSEMBLY CIRCUIT
PRESENT CC.1 : Short circuit to + 12 V
OR CO.0 : Open circuit or short circuit to earth
STORED

Conditions for applying the fault finding procedure to the stored fault:
The fault reappears after:
– clearing the fault from the memory,
– running the relay via the command AC011 "Low-speed fan assembly relay".
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connector.
Refer to the "Wiring diagrams" Technical Note for your vehicle to locate the relevant
fuses and relays.

CC.1 NOTES None.

Check the low speed fan assembly relay mounting connections.

Check the connectors on the engine management computer.
Repair if necessary.

Check the resistance of the "low speed fan assembly relay coil."
Replace the relay if its resistance is not 60 Ω ± 5 at + 20°°C.

Remove the low speed relay and check the insulation against + 12 volts of the connection between:
Engine management computer, connector A track H2 track 2 of the "low speed fan
assemblyrelay mounting".

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-36
 EDC15C13
DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF048

CONTINUED

CO.0 NOTES None.

Check the "low speed fan assembly" relay mounting connections .

Check the connectors on the engine management computer.
Repair if necessary.

Check the resistance of the "low speed fan assembly" relay coil.
Replace the relay if its resistance is not 60 Ω ± 5 at 20°°C.

Remove the low speed relay and check the continuity and insulation against earth of the connection
between:
Engine management computer, connector A track H2 track 2 "low speed fan
assembly relay mounting"
Check the presence of 12 V after relay on track 1 of the low speed fan assembly relay socket.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-37
 EDC15C13 DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF061 HEATER PLUG CIRCUIT
PRESENT 1.DEF : Preheating spark plug(s) faulty or in open circuit
OR
STORED

Conditions for applying the fault finding procedure to stored faults:

The fault reappears after:
– clearing the fault from the memory,
– running spark plugs via the command AC010 "Preheating relay".
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.
Refer to the "Wiring diagrams" Technical Note for your vehicle to locate the relevant
fuses and relays.

Priorities when dealing with a number of faults: Deal first with

1.DEF NOTES
fault DF091: "Sensor feed voltage n˚1" first if it is present.

Check the preheating unit connectors.

Check the connections on all the heater plugs.
Repair if necessary.
● Check the resistance of the heater plugs:
replace any spark plug whose resistance is not 0.4 to 0.9 Ω ± 0.1 at + 20°°C.

● Check the continuity of the following connections:

Preheating unit track 1 cylinder 3 heater plug
Preheating unit track 2 cylinder 4 heater plug,
Preheating unit track 6 cylinder 1 heater plug,
Preheating unit track 7 cylinder 2 heater plug.

● Check for the presence of + 12 V battery on track 3 of the preheating relay (via maxi fuse).
Check the engine earthing.

If the fault persists, check the engine management computer connectors.

Check the continuity and absence of interference suppresser on the connection between:
Engine management computer, connector B track H2 track 9 preheating unit
connector
If the fault persists, contact the Techline.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-38
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF067 FUEL PRESSURE SENSOR CIRCUIT

PRESENT CC.0 : Short circuit to earth
OR CO.1 : Open circuit or short circuit to + 12 V
STORED 1.DEF : Sensor supply fault

Conditions for applying the fault finding procedure to the stored fault:
If the fault is declared present after:
– the engine has been running for 5 minutes.

NOTES Special notes:

Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

IMPORTANT: It is forbidden to carry out an ohmmeter check on the pressure sensor.

CC.0 NOTES None.

Check the fuel pressure sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check the insulation against earth of the connection between:

Engine management computer, connector B track C3 track 2 fuel pressure sensor
connector
Check the continuity of the connection between:
Engine management computer, connector B track C2 track 3 fuel pressure sensor
connector
If the problem persists, replace the rail pressure sensor.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-39
 EDC15C13
DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF067

CONTINUED

CO.1 NOTES None.

Check the fuel pressure sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check the continuity and insulation against + 12 volts of the connection between:
Engine management computer, connector B track C3 track 2 fuel pressure sensor
connector
Check the continuity of the connection between:
Engine management computer, connector B track C4 track 1 fuel pressure sensor
connector
If the problem persists, replace the rail pressure sensor.

Priorities when dealing with a number of faults:

1.DEF NOTES If the DF091: Sensor feed voltage No. 1 fault is present,
treat it as a priority

Check the fuel pressure sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.
Check the following connections for continuity and make sure there is no interference suppresser:
Engine management computer, connector B track C3 track 2 rail pressure sensor
connector
Engine management computer, connector B track C2 track 3 rail pressure sensor
connector
Engine management computer, connector B track C4 track 1 rail pressure sensor
connector
Carry out the necessary repairs.
If all these connections are correct, check presence of a power supply to the fuel pressure sensor:
+5V track 3 of the rail pressure sensor connector
Earth track 1 of the rail pressure sensor connector
If the connections and power supplies are correct, replace the fuel pressure sensor.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-40
 EDC15C13
DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
CAMSHAFT SENSOR / ENGINE SPEED CONSISTENCY
DF070 1.DEF : Power supply problem, signal interference or internal fault in the camshaft
PRESENT sensor
OR 2.DEF : Absence of engine speed signal or interference of engine speed signal
STORED 3.DEF : Interference of engine speed signal, broken tooth on the flywheel or internal
fault in the engine speed sensor
4.DEF : Absence of camshaft signal or timing problem (belt tension or timing)

Conditions for applying the fault finding procedure to stored faults:

The fault is declared present following:
– the starter motor being activated for 10 seconds or,
– a time delay of 1 minute engine running.
NOTES
Special notes:
Use the Elec. 1613 bornier for any work on the ECU connector.
Carry out a charge circuit check and check the stability of the charging voltage using
an oscilloscope.

Priorities when dealing with a number of faults:

1.DEF NOTES
Deal with fault DF012: "Battery voltage" first if it is present.

Check the continuity and presence of feed between tracks 1 and 3 of the camshaft sensor connector:
12 V after relay feed track 3
Earth track 1
Check the continuity and absence of interference suppresser on the connection between:
Engine management computer, connector C track A3 track 2 of the camshaft sensor
connector
Repair if necessary.
Check that the camshaft signal is correct using an oscilloscope: square wave, amplitude 12.6 volts.
If the check reveals interference, check that the engine earths are correct (oxidation, tightness, etc.).
If the problem persists, check that the sensor is correctly fitted and in good condition (overheating).
If necessary replace the sensor.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-41
 EDC15C13
DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF070

CONTINUED 1

2.DEF NOTES None.

Check the engine speed sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.
Check the resistance of the engine speed sensor between tracks A and B:
Replace the sensor if the resistance is not: 800 Ω ± 80 at 20°°C on engine F9Q
200 to 270 Ω at 23°°C on engines G9T- G9U
Check the continuity of the following connections:
Engine management computer, connector B track D1 track 1 of the engine speed
sensor
Engine management computer, connector B track C1 track 2 of the engine speed
sensor
Check that the engine earthing is in order (oxidation, tightness, etc.).
Check fastening, air gap and condition (overheating) of the sensor. Replace if necessary.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-42
 EDC15C13
DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF070

CONTINUED 2

3.DEF NOTES None.

Check the engine speed sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check that the engine earthing is in order (oxidation, tightness, etc.).

Check the continuity of the following connections:
Engine management computer, connector B track D1 track 1 of the engine speed
sensor connector
Engine management computer connector B track C1 track 2 of the engine speed
sensor connector.
Check the resistance of the engine speed sensor between tracks A and B:
Replace the sensor if the resistance is not: 800 Ω ± 80 at 20°°C on engine F9Q
200 to 270 Ω at 23°°C on engine G9T - G9U.
Check the conformity of the engine speed signal using an oscilloscope: interference, broken tooth etc. Carry
out the necessary repairs.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-43
 EDC15C13
DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF070

CONTINUED 3

4.DEF NOTES None.

Check the camshaft sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check the continuity of the following connections:

Engine management computer, connector C track A3 track 2 of the camshaft sensor
connector
Engine management computer, connector C track B3 track 1 of the camshaft sensor
connector
Check for the presence of + 12 volts after relay on track 3 of the camshaft sensor connector.

– Check the tension of the timing belt.

– Check that it is correctly assembled: camshaft sprocket - camshaft.
– Check the timing adjustment.
On engines G9T - G9U and if working on the timing gear: camshaft - high pressure pump:
– Make sure the high pressure pump pinion has been properly refitted.
Carry out the necessary repairs.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-44
 EDC15C13
DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF071 PEDAL SENSOR CIRCUIT TRACK 1
PRESENT CO.0 : Open circuit or short circuit to earth
OR CC.1 : Short circuit to + 12 V
STORED 1.DEF : Sensor supply fault

Special notes:
NOTES Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

Priorities when dealing with a number of faults:

If fault "DF073: pedal sensor circuit track 2 CO.0" is also
CO.0 NOTES
present, check that the pedal sensor connector is properly
connected.

Check the pedal sensor connections.

Check the connectors on the engine management computer.
Repair if necessary.

Check the continuity and insulation against earth of the connection between:
Engine management computer, connector A track D2 track 3 pedal sensor connector
Also check that this connection is insulated against the following connections:
Engine management computer, connector A track D1 track 2 pedal sensor connector
Engine management computer, connector A track C1 track 1 pedal sensor connector
Check the continuity of the connection between:
Engine management computer, connector A track F3 track 4 pedal sensor connector
Measure the resistance of the pedal sensor track 1 across tracks 2 and 4.
Replace the sensor if the resistance is not approximately: 1.2 ± 0.48 kΩ
Ω at + 20°°C.

CC.1 NOTES None.

Check the pedal sensor connections.

Check the connectors on the engine management computer.
Repair if necessary.

Check for the insulation against + 12 V of the connection between:

Engine management computer, connector A track D2 track 3 pedal sensor connector
Check the continuity of the connection between:
Engine management computer, connector A track D1 track 2 pedal sensor connector
Measure the resistance of the pedal sensor track 1 across tracks 2 and 4.
Replace the sensor if the resistance is not approximately: 1.2 ± 0.48 kΩ
Ω at + 20°°C.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-45
 EDC15C13 DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF071

CONTINUED

Priorities when dealing with a number of faults:

1.DEF NOTES Deal with the DF091: "Sensor feed voltage no 1" fault as
a priority if it is present or stored.

Check the pedal sensor connections.

Check the connectors on the engine management computer.
Repair if necessary.

● Check the following connections for continuity and make sure there is no interference suppresser:
Engine management computer, connector A track F3 track 4 pedal sensor connector
Engine management computer, connector A track D2 track 3 pedal sensor connector
Engine management computer, connector A track D1 track 2 pedal sensor connector

● Check the insulation between the following two connections:

Engine management computer, connector A track F3 track 4 pedal sensor connector
Engine management computer, connector A track D1 track 2 pedal sensor connector

● Also check that they are insulated against + 12 volts.

If the fault persists, proceed with the accelerator pedal sensor conformity check.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-46
 EDC15C13 DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
FUEL PRESSURE SIGNAL
DF072 1.DEF : Measured pressure too high
PRESENT 2.DEF : Measured pressure too low
OR 3.DEF : Detection of leak at high pressure
STORED 4.DEF : Fuel overpressure
5.DEF : Pressure drop in the rail

Conditions for applying the fault finding procedure to stored faults:

The fault is declared present after:
– a 5 minute delay with the engine running at different idle speeds.
Special notes:
NOTES
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.
IMPORTANT:
It is forbidden to carry out an ohmmeter check on the pressure sensor.

Priorities when dealing with a number of faults:

1.DEF NOTES
First deal with all other present or stored faults.

Check the fuel pressure sensor connectors.

Check the fuel pressure solenoid valve connectors.
Check the connectors on the engine management computer.
Repair if necessary.

Check the insulation, continuity and for absence of interference suppresser in the connection between:
Engine management computer, connector B track L1 track 2 fuel pressure solenoid valve
connector

Check for the insulation against + 5 V of the connection between:

Engine management computer, connector B track C3 track 2 rail pressure sensor connector

Clear the fault.

Run command AC006: Fuel pressure solenoid valve:
– You should be able to perceive vibration from the fuel pressure regulator. Otherwise, go to step 1 of fault finding
procedure AC006.

Start the engine.

– If strong engine knocks are heard while idling, perform the injector fault finding described in the "Customer
Complaint" section of this note.

If the injectors are not faulty, first replace the regulator.

If the fault persists, replace the high pressure pump.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-47
 EDC15C13 DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF072

CONTINUED 1

2.DEF
3.DEF NOTES None.
5.DEF

Check the fuel pressure sensor connectors.

Check the fuel pressure solenoid valve connectors.
Check the connectors on the engine management computer.
Repair if necessary.
Check for the presence of + 12 V after relay on track 1 of the fuel pressure solenoid valve.
Check the insulation, the continuity and absence of interference suppresser on the connections between:
Engine management computer, connector B track L1 track 2 fuel pressure solenoid valve
connector
Engine management computer, connector B track C3 track 2 fuel pressure sensor connector

Run the actuator command AC006: "Fuel pressure solenoid valve". You should be able to perceive vibration
from the fuel pressure regulator. If not, go to step 1 of interpretation of commands AC006.

– Check the priming of the low pressure diesel circuit.

– Also check the conformity of the diesel filter connections and that the diesel fuel is not saturated with water.
– Check that there are no air bubbles between the filter and the high pressure pump.
– Check the seal of the low and high pressure diesel fuel circuits (visual checks, odour, etc.): pump housing,
overpressure valve, pipes, rail and injector unions, injector wells, etc.).
– Check the conformity of the seal fitting on the pressure regulator.

– With the vehicle ignition on, and engine stopped for over 1 minute:
– Display PR083 Rail pressure
– If the value is below 50 bar, the sensor is in order.
– if not replace the rail pressure sensor.

If the engine starts:

Clear the fault.
Start the engine and let it warm up.
Leave it running at idling speed for a few minutes (3 to 5 minutes):
– If it stalls and the fault reappears, replace the regulator.
If it does not stall, stabilise the engine speed at 2000 rpm (1 minute) then accelerate at "full load" until it cuts
out.
– If the engine stalls, replace the high pressure pump.
If the engine does not start or there is no timing:
Replace the solenoid valve in the first instance and if the problem persists, replace the high pressure pump.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-48
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF072

CONTINUED 2

Step 1
– Check the connections of the following components:
● Rail pressure sensor.
● Fuel pressure regulator.
● Computer.
● Fuel temperature sensor.
● Also check the condition of the wiring harness (wear, pinching, etc.).
If all of the checks reveal no fault, proceed to stage 2.
Checking the fuel low pressure system:
Step 2
– Check the fuel level in the tank:
● Fill up if necessary and reproduce the fault. Otherwise, proceed to stage 3.

Step 3
– Check that there are no fuel leaks (odour, etc.):
● Repair if necessary, otherwise proceed to stage 4.

Step 4
– Check the sealing of the low pressure circuit:
● If there are air bubbles present or external leaks, check the filter bleed screw, and repair the leaks if
necessary.
● If the pipes or hoses are worn or damaged, repair if necessary, otherwise proceed to stage 5.

Step 5
– Check the fuel priming bulb:
● If the unit is compressed, check for the loss of load in front of the unit.
● If the engine is fitted with a priming pump, check the flow variation at the fuel filter. Refer to the
procedure on the following page.
Step 6
– Check the condition of the fuel filter:
● Replace the filter if it is dirty. The fuel filter tank must be cleaned before the new filter is fitted, to
prevent dust particles from being transferred to the high pressure pump and the high pressure circuit.

Special notes on the low pressure circuit on engines fitted with a low pressure pump
Checking the efficiency of the low pressure pump on G9 engine fitted with it.
– Clear the faults using the CLIP fault finding tool.
– Apply the + after ignition feed.
– Connect the CLIP fault finding tool and run diagnostics on the "diesel injection" computer.
– Switch the ignition off then back on again as quickly as possible to prevent loss of dialogue with the
computer.
– Display PR083 "Rail pressure". The value should be approximately 4 bar under the + after ignition feed.
If this is not the case, check the low pressure circuit as well as the low pressure pump by using the Technical
Note or the Workshop Repair Manual for the vehicle. Carry out the necessary repairs.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-49
 EDC15C13 DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF072

CONTINUED 3

The low pressure circuit has been checked and no fault has been detected, if this is not the case, carry out the
necessary procedures.

STAGE I

– The engine is difficult to start (or possibly when using the low pressure fuel circuit priming bulb),
– The engine does not start.

YES NO

– Clear the faults using the CLIP fault finding tool. Proceed to STAGE II
– Disconnect the rail pressure regulation solenoid valve.
– Start the engine.
– Display PR083 "Rail pressure".

NO
Check for an injector internal leak
PR083 > 800 bar when starting? following the recommended procedure
in the relevant vehicle note or in
YES appendix 1 for additional information.
– Reconnect the rail pressure regulation solenoid valve
connections.
– Clear the faults using the CLIP fault finding tool. Is one of the injectors faulty?
– Start the engine. NO
YES

Does the engine have difficulty maintaining idling speed Replace the faulty injector.
(without acceleration) and stall after a few seconds?
YES
Replace* the CP3.2 (KÜV) pump
NO

Does the engine have difficulty maintaining idle speed after

sudden no-load acceleration and stall afterwards?

YES

Has fault finding already been carried out on

the rail pressure solenoid valve?

NO NO

Refer to the note relating to the

vehicle and activate command
YES
AC006 "Fuel pressure solenoid
valve" 3 times.
A

Start the vehicle again.

Replace the rail pressure regulation
solenoid valve.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-50
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF072

CONTINUED 4

STAGE I (continued)

The engine idling speed is unstable (without

acceleration) but does not stall.

YES

Check for an injector internal leak following

the recommended procedure in the
NO relevant vehicle note or in appendix 1 for
additional information.

NO
Is one of the injectors faulty? YES Replace* the faulty injector.

Road test
When accelerating under "full load", check
the following parameters:
PR086 "Rail pressure loop difference"
PR083 "Rail pressure".

PR086 often > 100 bar? YES Replace* the rail if necessary.
NO

No-load test:
Accelerate under no load and check for
leaks on the rail pressure limiter.

Are there leaks on the rail? YES Replace* the CP3.2 pump.

NO

Contact the techline.

* Note: Follow all of the advice given in the repair methods when removing mechanical and/or electrical
components.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-51
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF072

CONTINUED 5

The low pressure circuit has been checked and no fault has been detected, if this is not the case, carry out the
necessary procedures.

STAGE II

The engine starts with difficulty.

NO YES

Does the engine have difficulty maintaining idling speed

Replace* the CP3.2 (KÜV) pump
(without acceleration) and stall after a few seconds?

NO

Does the engine have difficulty maintaining idling speed after

sudden no-load acceleration and stall afterwards?

YES

Has fault finding already been carried out on

the rail pressure solenoid valve?

NO NO

Refer to the note relevant to the

vehicle and activate command
YES
AC006 "Fuel pressure solenoid
valve" 3 times.

Start the vehicle again.

Replace* the rail pressure regulation
solenoid valve.
The engine idling speed is unstable (without acceleration) but
the engine does not stall.

YES

Check for an injector internal leak following the

recommended procedure in the relevant
NO
vehicle note or in appendix 1 for additional
information.

NO
YES
Is one of the injectors faulty? Replace* the faulty injector.

Road test
When accelerating under full load, check the
following parameters:
PR086 "Rail pressure loop difference"
PR083 "Rail pressure".

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-52
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF072

CONTINUED 6

STAGE II (continued)

PR086 often > 100 bar? YES Replace* the CP3.2 pump.
NO

No-load test:
Accelerate under no load and check that there are
no leaks from the rail pressure limiter.

Are there leaks on the rail? YES Replace* the rail if necessary.
NO

Contact the techline.

*Note:
Follow all of the advice given in the repair methods when removing mechanical and/or electrical components.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-53
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF072

CONTINUED 7

Priorities when dealing with a number of faults:

Treat as a priority any other fault that is present or stored.
Special notes:
Clear the fault.
Warm engine: start the engine and leave it running at idle
speed (1 minute).
If the fault appears, perform the fault finding procedure
4.DEF NOTES explained below.
If not, carry out a road test at a speed higher than 3000 rpm
(stay above this speed for at least 10 seconds to remove
the fault).
If the fault reappears, perform the fault finding procedure
given below.
If it does not reappear, its previous appearance will have
been caused by an excessively "sporty" driving style.
End of fault finding.

Check the fuel pressure sensor connectors.

Check the fuel pressure solenoid valve connectors.
Check the connectors on the engine management computer.
Repair if necessary.

Check the continuity, insulation and absence of interference suppresser on the connection between:
Engine management computer, connector B track L1 track 2 fuel pressure solenoid
valve connector

On the CP3, make sure that the low pressure CP3-type fuel pump is no longer supplied when the engine is
running.

If the fault persists, replace the high pressure pump.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-54
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

TRACK 2 PEDAL SENSOR CIRCUIT

DF073
PRESENT CO.0 : Open circuit or short circuit to earth
OR CC.1 : Short circuit to + 12 V
STORED 1.DEF : Sensor supply fault
2.DEF : Consistency between track 1 and track 2

Conditions for applying the fault finding procedure to the stored fault:
If the fault is declared present after:
– successive cycles of full load and no load on the accelerator pedal.
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

Priorities when dealing with a number of faults:

If fault "DF071: Pedal sensor circuit track 1 CO.0 is also
CO.0 NOTES
present," check that the pedal sensor connector is properly
connected.

Check the connectors on the pedal sensor.

Check the connectors on the engine management computer.
Repair if necessary.

Check the continuity of the connection between:

Engine management computer, connector A track C2 track 6 pedal sensor connector
Also check the insulation of this connection against earth and against the following connections:
Engine management computer, connector A track D1 track 2 pedal sensor connector
Engine management computer, connector A track C1 track 1 pedal sensor connector
Check the continuity of the connection between:
Engine management computer, connector A track E3 track 5 pedal sensor connector
Measure the resistance of pedal sensor track 2 between tracks 1 and 5.
Ω ± 0.68 at + 20°°C.
Replace the sensor if the resistance is not: 1.7 kΩ

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-55
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF073

CONTINUED 1

CC.1 NOTES None.

Check the pedal sensor connections.

Check the connectors on the engine management computer.
Repair if necessary.

Check for the insulation against + 12 V of the connection between:

Engine management computer, connector A track C2 track 6 pedal sensor connector
Check the continuity of the connection between:
Engine management computer, connector A track C1 track 1 pedal sensor connector

If the fault persists, replace the pedal sensor.

Priorities when dealing with a number of faults:

1.DEF NOTES If fault "DF092: Sensor feed voltage no. 2" is present or
stored, treat it as a priority.

Check the pedal sensor connections.

Check the connectors on the engine management computer.
Repair if necessary.

Check for continuity and make sure there is no interference suppresser on the following connections:
Engine management computer, connector A track C2 track 6 pedal sensor
connector
Engine management computer, connector A track E3 track 5 pedal sensor
connector
Engine management computer, connector A track C1 track 1 pedal sensor
connector
Also check that they are insulated against + 12 volts.
Check the insulation against the earth of the connection between:
Engine management computer, connector A track E3 track 5 pedal sensor
connector
If the fault persists, replace the pedal sensor.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-56
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF073

CONTINUED 2

2.DEF NOTES None.

Check the pedal sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check the continuity and absence of interference suppresser on the following connections:
Engine management computer, connector A track F3 track 4 pedal sensor connector
Engine management computer, connector A track D2 track 3 pedal sensor connector
Engine management computer, connector A track D1 track 2 pedal sensor connector
Engine management computer, connector A track E3 track 5 pedal sensor connector
Engine management computer, connector A track C2 track 6 pedal sensor connector
Engine management computer, connector A track C1 track 1 pedal sensor connector
Carry out the necessary operations if the resistance is abnormally high.
If the checks are correct, replace the accelerator pedal sensor.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-57
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

TURBOCHARGING PRESSURE SENSOR

DF074 CO.0 : Open circuit or short circuit to earth
PRESENT CC.1 : Short circuit to + 12 V
OR 1.DEF : Sensor supply fault
STORED 2.DEF : Inconsistency between the turbocharging pressure and the atmospheric
pressure

Conditions for applying the fault finding procedure to stored faults:

The fault is declared present following:
– engine start, or
– carrying out a road test.
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

CO.0 NOTES None.

Check the turbocharging pressure sensor connectors.

Check the connectors on the engine management computer. Repair if necessary.

Check the continuity and insulation against earth of the connection between:
Engine management computer, connector B track B3 track B turbocharging
pressure sensor connector
Also check the continuity of the connection between:
Engine management computer, connector B track B2 track C turbocharging
pressure sensor connector

If the fault persists, change the turbocharging pressure sensor.

CC.1 NOTES None.

Check the turbocharging pressure sensor connectors.

Check the connectors on the engine management computer. Repair if necessary.

Check for the insulation against + 12 V of the connection between:

Engine management computer, connector B track B3 track B turbocharging
pressure sensor connector
Check the continuity of the connection between:
Engine management computer, connector B track B4 track A turbocharging
pressure sensor connector

If the fault persists, perform the parameter interpretation fault finding PR082 "Turbocharging pressure".

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-58
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF074

CONTINUED

Priorities when dealing with a number of faults:

1.DEF NOTES Deal with fault DF091 "Sensor feed voltage no. 1" first if it
is present or stored.

Check the turbocharging pressure sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check the insulation, the continuity and absence of interference suppresser on the connections between:
Engine management computer, connector B track B3 track B turbocharging
pressure-sensor connector
Engine management computer, connector B track B4 track A turbocharging
pressure-sensor connector
Engine management computer, connector B track B2 track C turbocharging
pressure-sensor connector
If the fault persists, perform the parameter interpretation fault finding PR082 "Turbocharging pressure".

2.DEF NOTES None.

Check the turbocharging pressure sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check the continuity and absence of interference suppresser on the connection between:
Engine management computer, connector B track B3 track B turbocharging
pressure-sensor connector.
Carry out the necessary operations if the resistance is abnormally high.
If the fault persists:
Check the sensor mounting and the sealing ring on its seal or hoses (tightness of clip, etc.).
Check that there are no leaks in the induction circuit: unions, hoses, sleeves, exchanger, .
If the fault persists, perform the parameter interpretation fault finding PR082 "Turbocharging pressure".

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-59
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF075 ATMOSPHERIC PRESSURE SENSOR

PRESENT 1.DEF : Feed voltage too low
OR 2.DEF : Feed voltage too high
STORED

Priorities when dealing with a number of faults:

1.DEF
NOTES Deal with fault DF091 "Sensor feed voltage no. 1" first if it
2.DEF
is present or stored.

If the fault is stored, clear the fault from the engine management computer memory.
Switch off the ignition, then switch it on again to initialise the computer.
If the fault recurs, contact your Techline.
If the fault is present, contact the Techline.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-60
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF077 EGR VALVE

PRESENT CC.1 : Short circuit to + 12 V
OR CO.0 : Open circuit or short circuit to earth
STORED 2.DEF : Positive loop deviation

Conditions for applying the fault finding procedure to stored faults:

The fault reappears after:
– erasing the memory,
– running the valve via the command AC007 "EGR valve".
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

CC.1 NOTES None.

Check the connectors of the exhaust gas recirculation valve.

Check the connectors on the engine management computer. Repair if necessary.

Measure the resistance of the exhaust gas recirculation valve between tracks 1 and 5.
If its resistance is not 8 Ω ± 0.5 at + 20 °C, replace the exhaust gas recirculation valve.
With the exhaust gas recirculation valve disconnected, check the insulation from + 12 V of the connection
between:
Engine management computer, connector B track M1 track 5 of the exhaust gas
recirculation valve connector

If the fault persists, replace the exhaust gas recirculation valve. Refer to the section "Replacing components"
and follow the correct procedure to replace the exhaust gas recirculation valve.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-61
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF077

CONTINUED

Special notes:
If fault DF084 "EGR valve position sensor circuit CO.0" is
CO.0 NOTES
present at the same time, make sure the exhaust gas
recirculation valve connector is properly connected.

Check the connectors of the exhaust gas recirculation valve.

Check the connectors on the engine management computer. Repair if necessary.

Measure the resistance of the exhaust gas recirculation valve between tracks 1 and 5.
If its resistance is not 8 Ω ± 0.5 at + 20°°C, replace the exhaust gas recirculation valve.
Check the continuity and insulation against earth of the connection between:
Engine management computer, connector B track M1 track 5 exhaust gas
recirculation valve connector
Check for the presence of + 12 V "after relay" on track 1 of the exhaust gas recirculation valve connector.

If the fault persists, replace the exhaust gas recirculation valve. Refer to the section "Replacing components"
and follow the correct procedure to replace the exhaust gas recirculation valve.

Priorities when dealing with a number of faults:

2.DEF NOTES Deal first with fault DF019: Air flowmeter sensor circuit
2.DEF if it is present.

Check the connectors of the exhaust gas recirculation valve.

Check the connectors on the engine management computer.
Repair if necessary.

Check the seal of the air intake circuit and the exhaust gas recirculation circuit.
If the fault persists, carry out fault finding procedure AC007 : "EGR valve"

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-62
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF079 HEATING ELEMENT RELAY no. 3

PRESENT CC.1 : Short circuit to + 12 V
OR CO.0 : Open circuit or short circuit to earth
STORED

Conditions for applying the fault finding procedure to the stored fault:
If the fault is declared present after running actuator command AC002 "Heating
element relay n˚3"
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

CC.1 NOTES None.

Check the connectors on the relay mounting of "additional heater 3" on the engine fuse box.
Check the connectors on the engine management computer.
Repair if necessary.

Check the conformance of "additional heater No. 3 relay" (with relay removed):
– Insulation between tracks 3 and 5.
– Resistance of the relay coil between tracks 1 and 2: 90 Ω ± 5 at + 20 °C.
– Replace the relay if its resistance does not match this value.
Check for the insulation against + 12 V of the connection between:
Engine management computer, connectorA track G1 track 2 of the additional heater
3 relay mounting.
Also check this connection is insulated against the following connections:
"additional heater 3" relay mounting, track 1 + 12 V after relay
"additional heater 3" relay mounting, track 3 + 12 V battery

CO.0 NOTES None.

Check the connectors on the relay mounting of "additional heater 3" on the engine fuse box.
Check the connectors on the engine management computer.
Repair if necessary.

Measure the resistance of the "additional heater 3" relay coil, between tracks 1 and 2:
– replace the relay if its resistance is not 90 Ω ± 5 at + 20°°C.
Check the continuity and insulation against earth of the connection between:
Engine management computer, connector A track G1 track 2 of the "additional heater
3" relay mounting.
Check for the presence of + 12 volts after relay on track 1 of the "additional heater 3" relay mounting.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-63
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF081 PREHEATING RELAY CIRCUIT

PRESENT CC.1 : Short circuit to + 12 V
OR CO.0 : Open circuit or short circuit to earth
STORED

Stored fault diagnostic application conditions:

If the fault is declared present after running actuator command AC010 "Preheating
relay".
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

CC.1 NOTES None.

Check the preheating unit connectors.

Check the connectors on the engine management computer.
Repair if necessary.
Check for the insulation against + 12 V of the connection between:
Engine management computer, connector B track G1 track 8 preheating unit
connector
Check the continuity and absence of interference suppresser on the connection between:
Engine management computer, connector B track H2 track 9 preheating unit
connector
If the fault persists, replace the pre-postheating unit.

CO.0 NOTES None.

Check the preheating unit connectors.

Check the connectors on the engine management computer.
Repair if necessary.
Check the continuity and insulation against earth of the connection between:
Engine management computer, connector B track G1 track 8 preheating unit
connector
Check the continuity and absence of interference suppresser on the connection between:
Engine management computer, connector B track H2 track 9 preheating unit
connector
Check that 12 volt battery is present on track 3 of the preheating unit connector.
If the fault persists, replace the preheating unit.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-64
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF082 low pressure PUMP RELAY CIRCUIT

PRESENT CC.1 : Short circuit to + 12 V
OR CO.0 : Open circuit or short circuit to earth
STORED

Conditions for applying the fault finding procedure to the stored fault:
If the fault is declared present after running actuator command AC005 "Low pressure
control relay pump".
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

CC.1 NOTES None.

Check the fuel pump relay mounting connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Remove the fuel pump relay and check it is correct:

– Insulation between tracks 3 and 5 of the relay (at rest position).
– Resistance of the coil between tracks 1 and 2: 90 Ω ± 5 at + 20°°C.
Replace the relay if the resistance does not match this value.
If the fault persists:
Check the state of fuse F2 (30A).
Check the insulation against "+ 12 volt on the battery" and "12 volts" after relay on the connection between:
Engine management computer, connector C track C1 track B2 of the fuel pump relay
mounting (F9Q)
track 49 of the fuel pump relay
mounting (G9T G9U)
+ 12 V battery track B3 relay mounting (F9Q)
track 41 relay mounting
(G9T G9U)
+ 12 V after relay track B1 relay mounting (F9Q)
track 61 relay mounting
(G9T G9U)

If the fault persists, change the fuel pump relay.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-65
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF082

CONTINUED

CO.0 NOTES None.

Check the fuel pump relay mounting connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check that the fuel pump relay is correct:

– Resistance of the coil between tracks 1 and 2: 90 Ω ± 5 at + 20°°C.
– Replace the relay if its resistance does not match this value.
Check the continuity and insulation against earth of the connection between:
Engine management computer, connector C track C1 track B2 fuel pump relay
mounting (F9Q)
track 49 of the fuel pump relay
mounting (G9T G9U)
Check for the presence of + 12 V "after relay" track B1 fuel pump relay
mounting (F9Q)
track G1 of the fuel pump relay
mounting (G9T G9U)
If the fault persists, change the fuel pump relay.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-66
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF083 FUEL PRESSURE SOLENOID VALVE CIRCUIT

PRESENT CC.1 : Short circuit to + 12 V
OR CO.0 : Open circuit or short circuit to earth
STORED 1.DEF : Consistent after switching the ignition off

Conditions for applying fault finding to a stored fault for CC.1 or CO.0:
The fault reappears after:
– clearing the fault from the memory,
– running the solenoid valve via the command AC006 "Fuel pressure solenoid valve
NOTES command".

Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

CC.1 NOTES None.

Check the fuel pressure solenoid valve connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check the resistance of the fuel pressure solenoid valve between tracks 1 and 2:
Change the solenoid valve if the value is not: 3 Ω ± 0.5 at 20°°C.
With the fuel pressure solenoid valve connector disconnected, check the insulation against + 12 volts of the
connection between:
Engine management computer, connector B track L1 track 2 fuel pressure solenoid
valve connector.
If the fault is still present, replace the solenoid valve.

CO.0 NOTES None.

Check the fuel pressure solenoid valve connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check the resistance of the fuel pressure solenoid valve between tracks 1 and 2:
Change the solenoid valve if the value is not: 3 Ω ± 0.5 at 20°°C.
Check the continuity and insulation against earth of the connection between:
Engine management computer, connector B track L1 track 2 fuel pressure solenoid
valve connector.
Check for the presence of + 12 V "after relay" on track 1 of the fuel pressure solenoid valve.
If the fault is still present, replace the solenoid valve.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-67
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF083

CONTINUED

Conditions for applying the fault finding procedure:

To a stored fault.
1.DEF NOTES Priorities when dealing with a number of faults:
Deal first with fault DF070 "Camshaft / engine speed
consistency" 2.DEF or 3.DEF if it is present.

On a vehicle which is equipped with an inlet damper valve, check it is working properly using fault finding
procedure AC593 "inlet damper valve".

Check the fuel pressure solenoid valve connectors.

Check the connectors on the engine management computer.
Repair if necessary.

– Check for continuity and make sure there is no interference suppresser on the following connections:
Engine management computer, connector B track C1 track 2 engine speed sensor
Engine management computer, connector B track D1 track 1 engine speed sensor
Carry out the necessary operations if the resistance is abnormally high.

– Check earthing of the engine block.

Check the resistance of the fuel pressure solenoid valve between tracks 1 and 2:
Change the solenoid valve if the value is not: 3 Ω ± 0.5 at 20°°C.

– Check the continuity and absence of interference suppresser on the connection between:
Engine management computer, connector B track L1 track 2 of the fuel pressure
solenoid valve
Carry out the necessary operations if the resistance is abnormally high.

If the fault persists, perform the command interpretation diagnostic: AC006 Fuel pressure solenoid valve.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-68
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

EGR VALVE POSITION SENSOR CIRCUIT

DF084 CO.0 : Open circuit or short circuit to earth
PRESENT CC.1 : Short circuit to + 12 V
OR 1.DEF : Sensor supply fault
STORED 2.DEF : Offset too high: valve damaged, blocked open or abnormal
3.DEF : Valve blocked open
4.DEF : Valve damaged

Conditions for applying the fault finding procedure to stored faults:

The fault reappears after:
– Clearing of the fault memory
Running the valve via the command AC007 "EGR valve"
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

Priorities when dealing with a number of faults:

If fault DF077 "EGR valve CO.0" is also present, check that
CO.0 NOTES
the exhaust gas recirculation valve connector is correctly
connected.

Check the connectors of the exhaust gas recirculation valve.

Check the connectors on the engine management computer.
Repair if necessary.

Check the continuity and insulation against earth of the connection between:
Engine management computer, connector B track D3 track 6 exhaust gas
recirculation valve connector
Check the continuity of the connection between:
Engine management computer, connector B track D2 track 2 exhaust gas
recirculation valve connector
Check for the presence of + 5 V on track 2 of the exhaust gas recirculation valve connector.
If the fault persists, replace the exhaust gas recirculation valve (follow procedure RZ007 described in the
"Replace components" section).

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-69
 EDC15C13 DIESEL INJECTION SYSTEM
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF084

CONTINUED 1

CC.1 NOTES None.

Check the connectors of the exhaust gas recirculation valve.

Check the connectors on the engine management computer.
Repair if necessary.

Check for the insulation against + 12 V of the connection between:

Engine management computer, connector B track D3 track 6 exhaust gas
recirculation valve connector
Check the continuity and the absence of interference suppresser on the connection between:
Engine management computer, connector B track D4 track 4 exhaust gas
recirculation valve connector
Also check for the computer earth on track 4 of the exhaust gas recirculation valve connector. If the fault
persists, replace the exhaust gas recirculation valve (follow procedure RZ007 described in the "Replace
components" section).

Priorities when dealing with a number of faults:

1.DEF NOTES If the DF091 "Sensor feed voltage No. 1" fault is present or
stored, treat it as a priority.

Check the connectors of the exhaust gas recirculation valve.

Check the connectors on the engine management computer.
Repair if necessary.

With the connectors disconnected:

Check the following connections for continuity and make sure there is no interference suppresser:
Engine management computer, connector B track D2 track 2 exhaust gas
recirculation valve connector
Engine management computer, connector B track D4 track 4 exhaust gas
recirculation valve connector
Engine management computer, connector B track D3 track 6 exhaust gas
recirculation valve connector
Also check that they are insulated against + 12 volts.
If the fault persists, check for the presence of:
+ 5 V on track 2 of the exhaust gas recirculation valve connector
Computer earth on track 4 of the exhaust gas recirculation valve connector
– If the power supply is faulty, make the necessary repairs (harness, connectors etc.)
– If the power supply and connections are okay, replace the exhaust gas recirculation valve (follow procedure
RZ007 described in the "Replace components" section).

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-70
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF084

CONTINUED 2

2.DEF
3.DEF NOTES None.
4.DEF

– Check the connectors of the exhaust gas recirculation valve (exhaust gas recirculation valve side).
– Check the engine management computer connectors (computer side) (no conductor particles or bent rods).

– Check the connection insulation against + 5 V and + 12 V:

Engine management computer, connector B track D3 track 6 exhaust gas recirculation
valve connector
– Check the power supply of the exhaust gas recirculation valve position sensor:
+ 5 V on track 2 of the exhaust gas recirculation valve connector.
computer earth on track 4 of the exhaust gas recirculation valve connector
Carry out the necessary repairs.

● If this fault is combined with engine problems such as poor performance and/or fumes:
– If the fault persists, replace the exhaust gas recirculation valve (follow procedure RZ007 given in the section
"Replace components").

● If this fault is combined with engine problems such as poor performance and/or fumes:
– From the "COMMAND" menu, select "DELETE" then RZ007 "EGR Programming",
– When the command has finished running, turn off the engine and wait for the power latch* to end,
– Turn the ignition back on, then reinitialise communication with the fault finding tool,
– Delete the DF084,
– Start the engine.
– After waiting 50 seconds, accelerate to 2500 rpm for ~ 5 seconds, then return to idle,
– Repeat this procedure 5 times,
– If the fault does not recur, end the fault finding operation.
– If the fault recurs, replace the exhaust gas recirculation valve (follow procedure RZ007 described in
the "Replace components" section).

* Engine immobiliser light flashes for a few seconds after the ignition is switched off.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-71
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF088 FLYWHEEL SIGNAL INFORMATION INCONSISTENCY

PRESENT 1.DEF : overspeed detected.
OR
STORED

Conditions for applying the fault finding procedure to stored faults:

The fault reappears after:
– clearing the fault from the memory,
– engine start,
– engine speed rises above ~ 3500 rpm.

NOTES Special notes

This fault appears if the computer detects that the engine speed has exceeded the
maximum.
It could therefore be the result of bad "driving", such as downshifting directly from 5th
to 2nd gear.
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

1.DEF NOTES None.

Check the conformity of the charging circuit (correct charging voltage and no interference).
Check that the engine and computer earths are correct (tightening, oxidation, etc.).
Check the resistance of the engine speed sensor between tracks 1 and 2.
Replace the sensor if the resistance is not: 200 to 270 Ω at 23°°C (on engines G9T, G9U)
800 Ω ± 80 at 20°°C (on engine F9Q)
If the fault persists, change the engine speed sensor.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-72
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF091 SENSOR FEED VOLTAGE No. 1

PRESENT 1.DEF : Voltage too low
OR 2.DEF : Voltage too high
STORED

Conditions for applying the fault finding procedure to stored faults:

The fault reappears after:
– clearing the fault from the memory,
– a time delay of 1 minute engine running.
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.
Use the "Wiring diagrams" Technical Note for your vehicle.

1.DEF NOTES None.

Note:
Feed N˚ 1 serves the following components:
– pedal sensor (track 1),
– fuel pressure sensor,
– air flowmeter,
– exhaust gas recirculation valve,
– turbocharging pressure sensor (if installed).
Display parameter PR090: "Sensor supply voltage No. 1".
– If this voltage is below 4.9 V, disconnect the connectors on all the sensors referred to above one by one.
If the voltage returns to normal after a disconnection, change the faulty sensor or repair the connection.
(Wait a few seconds between each disconnection to allow the computer to take the measurement).
Clear the faults created by the multiple disconnections.
If, with all the sensors disconnected, the voltage is still less than + 4.9 V:
– check the insulation against earth of the + 5 V line of each sensor.
– Also check the insulation between:
tracks 2 and 4 of the pedal sensor connector,
tracks 1 and 3 of the fuel pressure sensor connector,
tracks 2 and 3 of the air flowmeter connector.
tracks 2 and 4 of the exhaust gas recirculation valve connector.
tracks 1 and 2 of the turbocharging pressure sensor connector.
Carry out the necessary repairs.
If the fault persists, carefully examine the engine management computer connections (for conductive particles,
bent pins).
If the fault persists, contact the Techline.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-73
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF091

CONTINUED

2.DEF NOTES None.

Note:
Feed N˚ 1 serves the following components:
– pedal sensor (track 1),
– fuel pressure sensor,
– air flowmeter,
– exhaust gas recirculation valve
– turbocharging pressure sensor (if installed).
Repair if necessary.
Display parameter PR090 "Sensor supply voltage No. 1".
– If the voltage is above 5.1 V, disconnect all the sensor connectors referred to above one by one.

If the voltage returns to normal after a disconnection, change the faulty sensor or repair the connection.
(Wait a few seconds between each disconnection to allow the computer to take the measurement).
Clear the faults created by the multiple disconnections.

If, with these sensors disconnected, the voltage is still greater than + 5.1 V:
– Check the insulation against + 12 V of the following connections:
Engine management computer, connector A track F3 track 4 of the pedal sensor
connector
Engine management computer, connector B track C2 track 3 of the fuel pressure sensor
connector.
Engine management computer, connector B track A2 track 3 of the airflow sensor
connector
Engine management computer, connector B track D2 track 2 of the exhaust gas
recirculation valve connector
Engine management computer, connector B track B2 track 1 of the turbocharging
pressure sensor connector
Carry out the necessary repairs.
If the fault persists, carefully examine the engine management computer connections (for conductive particles,
bent pins).
If the fault persists, contact the Techline.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-74
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF092 SENSOR FEED VOLTAGE No. 2

PRESENT 1.DEF : Voltage too low
OR 2.DEF : Voltage too high
STORED

Conditions for applying the fault finding procedure to stored faults:

The fault reappears after:
– clearing the fault from the memory,
– the engine has been running for 1 minute.
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.
Use the "Wiring diagrams" Technical Note for your vehicle.

1.DEF NOTES None.

Note:
Feed N˚ 2 serves the following components:
– pedal sensor,
– refrigerant fluid pressure sensor (Master only)

Display parameter PR091: "Sensor supply voltage No. 2":

– If this voltage is below 4.9 V, disconnect the connectors on all the sensors referred to above one by one.

If, after a disconnection, the voltage returns to normal, replace the faulty sensor or repair the connection, (wait
a few seconds between each disconnection to allow the computer to take a measurement.)
Clear the faults created by the multiple disconnections.

If, with these sensors disconnected, the voltage is still less than + 4.9 V:
– check the insulation against earth of the + 5 V line of each sensor.
– Also check the insulation between:
tracks 1 and 5 of the pedal sensor connector.
tracks A and C of the refrigerant pressure sensor (Master only).
Carry out the necessary repairs.
If the fault persists, carefully examine the engine management computer connections (for conductive particles,
bent pins).
If the fault persists, contact the Techline.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-75
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF092

CONTINUED

2.DEF NOTES None.

Note:
Feed N˚ 2 serves the following components:
– pedal sensor,
– refrigerant fluid pressure sensor (Master only)
Display parameter PR091: "Sensor supply voltage No. 2":
– If the voltage is above 5.1 V, disconnect all the sensor connectors referred to above one by one.

If, after a disconnection, the voltage returns to normal, replace the faulty sensor or repair the connection, (wait
a few seconds between each disconnection to allow the computer to take a measurement).
Clear the faults created by the multiple disconnections.

If, with these sensors disconnected, the voltage is still greater than + 5.1 V:
– check the insulation against + 12 V of the following connections:
Engine management computer, connector C track C4 track 5 of the pedal sensor connector
Engine management computer, connector B track E2 track C of the refrigerant pressure
sensor
Carry out the necessary repairs.
If the fault persists, carefully examine the engine management computer connections (for conductive particles,
bent pins).
If the fault is still present, contact the Techline.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-76
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF094 heating element NO. 1 RELAY

PRESENT CC.1 : Short circuit to + 12 V
OR CO.0 : Open circuit or short circuit to earth
STORED

Conditions for applying the fault finding procedure to stored faults:

If the fault reappears as present after:
– actuator command AC301: "heating element no. 1 relay".

NOTES Special notes:

Use Elé. 1613 bornier for all operations on the engine management computer
connectors.
Refer to the "Wiring diagrams" Technical Note for your vehicle to locate the relevant
fuses and relays.

CC.1 NOTES None.

Check the connectors of "additional heater no. 1" relay.

Check the connectors on the engine management computer.
Repair if necessary.

Check that the !additional heater no. 1" relay is correct (with relay removed):
– Insulation between tracks 3 and 5 (in resting position).
– Resistance of the coil between tracks 1 and 2: 90 Ω ± 5 at + 20°°C.
– Replace the relay if its resistance does not match this value.
Check for the insulation against + 12 V of the connection between:
Engine management computer, connector A track H1 track 2 "additional heater 1"
relay mounting
Also check this connection is insulated against the following connections:
"Additional heater 1" relay mounting, track 1 + 12 V "after relay"
"Additional heater 1" relay mounting, track 3 + 12 V battery

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-77
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF094

CONTINUED

CO.0 NOTES None.

Check the connectors of"additional heater no. 1" relay.

Check the connectors on the engine management computer.
Repair if necessary.

Check for the presence of + 12 Volts "after relay" on track 1 of the relay mounting for "additional heating 1".
Measure the resistance of the relay coil between tracks 1 and 2:
– Replace the relay if its resistance is not 90 Ω ± 5 at 20°°C.
Check the continuity and insulation against earth of the connection between:
Engine management computer, connector A track H1 track 2 "additional heater 1"
relay mounting

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-78
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No: CB
Vdiag No: 19
Fault finding - Interpretation of faults
EXCEPT MULTIPLEX

DF095 VEHICLE SPEED SIGNAL

PRESENT 1.DEF: Vehicle speed too high
OR 2.DEF: Vehicle speed signal frequency too high
STORED 3.DEF: Inconsistency between engine speed and air flow

Conditions for applying the fault finding procedure to stored faults:

If the fault becomes present during:
– a road test (speed above 2000 rpm).

NOTES Special notes:

Use Elé. 1613 bornier for all operations on the engine management computer
connectors.
Refer to the Wiring diagrams Technical Note for your vehicle to locate the
connections and sockets concerned.

Appearance condition:
1.DEF
1.DEF / 2.DEF: interference signal or system anomaly
2.DEF NOTES
generating speed information.
3.DEF
3.DEF: no signal or speed information system fault.

Perform a road test and compare the speed indicated by the fault finding tool (PARAMETERS menu) with that
shown on the instrument panel:
Check that the "additional heater no. 1" relay is correct (with relay removed):
If these two values do not coincide:
– Check that the engine earths are correct (oxidation, tightness, etc.).
– Check the continuity and absence of interference suppresser on the following connections :
– ABS/ESP computer track 22 track A2, connector A, engine management computer (via
junction),
– ABS/ESP computer track 22 track 23, instrument panel (via junction),
– Engine management computer, connector A track A2 track 23, instrument panel (via junction),
Also check the insulation of these connections against earth and against + 12 Volts.
Carry out the necessary repairs.
If the fault persists: The ABS-ESP system issues a vehicle speed signal shared by the electronic unit and the
instrument panel computer. To prevent this causing a problem, disconnect it, clear the fault and carry out a
road test.
If the fault does not reappear, the instrument panel or one of its connections is causing the fault . Carry out a
fault finding procedure of the instrument panel.
If the fault persists, carry out an ABS/ESP fault finding procedure.
If the two values coincide:
Check the insulation against earth and against + 12 Volts of the following connection:
Engine management computer, connector A track A2 track 22 ABS-ESP computer relay
mounting.
If the fault persists, carry out an ABS/ESP fault finding procedure.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-79
 EDC15C13
DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF097 CLUTCH CONTACT SIGNAL
PRESENT 1.DEF : Consistent with vehicle speed
OR
STORED

Conditions for applying the fault finding procedure to

stored faults:
If the fault becomes present during:
– a road test exceeding 60 mph (100 km/h).

Priorities when dealing with a number of faults:

1.DEF NOTES
Deal with the "DF095: Vehicle speed signal" fault as a
priority if it is declared present or stored.

Special notes:
Use Elé. 1613 bornier for all operations on the engine
management computer connector.

Check the clutch switch connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Step 1
A) - Check status ET142: CLUTCH PEDAL. Press the clutch pedal and note whether this state becomes
active.
If it becomes active,
– Clear the fault, switch off the engine, wait for the end of the power latch*, and switch the ignition back on.
Perform a road test and then take a fault reading. If the fault reappears, go to step 2. Otherwise, this is the
end of the fault finding procedure.
If it does not become active,
B) - Check the switch adjustment.
– Check the continuity and insulation against earth of the connection between:
Engine management computer, connector A track C4 track A1 clutch switch
– Check and ensure the presence of earth on track B3 of the clutch switch connector (engine F9Q).
– Check and ensure the presence of earth on track A2 of the clutch switch connector (engine G9T and G9U).
Repair if necessary.
– Check the operation of the clutch switch:
– F9Q engines:
– Closing of the contact between tracks A1 and B3 when the clutch pedal is pressed.
– Opening of the contact between tracks A1 and B3 when the clutch pedal is released.
– G9T and G9U engines:
– Closing of the contact between tracks A1 and A2 when the clutch pedal is pressed.
– Opening of the contact between tracks A1 and A2 when the clutch pedal is released.
– Replace the switch if necessary.
When repair is complete, return to step A.

Step 2
– If the fault recurs, contact your Techline.

* the immobiliser warning light will flash for a few seconds after the ignition is switched off

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-80
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

MAIN RELAY
DF098 1.DEF : Relay cut out too soon
STORED 2.DEF : Relay cut out too late

Fault finding procedure application conditions:

The fault reappears after:
– clearing the fault from the memory,
– engine start
– the ignition is switched off with loss of communication,
– switching on the ignition,
NOTES – establishing communication.

Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.
Refer to the "Wiring diagrams" in the Technical Note for your vehicle to locate the
relevant connections and relays.

1.DEF GR1 NOTES None.

Check the injection supply relay mounting connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check the tightness and the condition of the battery terminals + and -.

Check the continuity of the following connections:

Injection supply relay track 5 tracks M2 and M3, connector B of the engine
management computer
Injection supply relay track 2 track F1, connector B of the engine management
computer

Check that the relevant fuses are correct (crimping and condition of the terminal wires).
Check that the impact sensor is correct: false contact (depending on equipment)
Check the conformity of the engine management computer earths:
Earth track L3, L4, M4, connector B of the engine management computer

If the fault persists after these checks, change the injection supply relay.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-81
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF098

CONTINUED

2.DEF NOTES None.

Check the main relay connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check insulation against earth of the following connection:

Main relay track 2 track F1, computer connector B.
Check the conformity of the main relay (relay removed):
– Insulation of contacts between tracks 3 and 5
– Resistance of the coil between tracks 1 and 2: 60 Ω ± 5 at + 20°°C.
– Replace the relay if its resistance does not match this value.

If the fault persists after these checks, change the injection supply relay.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-82
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF099 CYLINDER 1 INJECTOR CIRCUIT

PRESENT 1.DEF: Overcurrent on injector energising current
OR 2.DEF : Low injector control current
STORED

Conditions for applying the fault finding procedure to stored faults:

If the fault reappears as present after:
– engine start.
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

1.DEF NOTES None.

Check the connectors for injector no. 1.

Check the connectors on the engine management computer.
Repair if necessary.

Measure the resistance of injector no. 1:

Replace the injector if the resistance between tracks 1 and 2 is not: 0.33 Ω at + 20°°C/ 2 Ω maximum.
Check the insulation between the following two connections:
Engine management computer, connector C track G3 track 2 Injector No. 1 connector
Engine management computer, connector C track G1 track 1 Injector No. 1 connector
Check insulation against earth of the following connection:
Engine management computer, connector C track G1 track 1 of the injector No. 1
connector
If the fault persists, go to the injector fault finding procedure in the "Customer complaints" section of this note.

2.DEF NOTES None.

Check the connectors for injector no. 1.

Check the connectors on the engine management computer.
Repair if necessary.

Check the continuity of the following connections:

Engine management computer, connector C track G3 track 2 Injector No. 1 connector
Engine management computer, connector C track G1 track 1 Injector No. 1 connector
Measure the resistance of injector no. 1:
Replace the injector if the resistance between tracks 1 and 2 is not: 0.33 Ω at + 20°°C / 2 Ω maximum.
If the fault persists, go to the injector fault finding procedure in the Customer complaints section of this note.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-83
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF100 CYLINDER 2 INJECTOR CIRCUIT

PRESENT 1.DEF : Overcurrent on injector energising current
OR 2.DEF : Low injector control current
STORED

Conditions for applying the fault finding procedure to stored faults:

If the fault reappears as present after:
– engine start.
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

1.DEF NOTES None.

Check the connectors for injector no. 2.

Check the connectors on the engine management computer.
Repair if necessary.

Measure the resistance of injector no. 2.

Replace the injector if the resistance between tracks 1 and 2 is not: 0.33 Ω at + 20°°C/ 2 Ω maximum
Check the insulation between the following two connections:
Engine management computer, connector C track H4 track 2 Injector No. 2 connector
Engine management computer, connector C track H2 track 1 Injector No. 2 connector
Check insulation against earth of the following connection:
Engine management computer, connector C track H2 track 1 of the injector No. 2
connector
If the fault persists, go to the injector fault finding procedure in the "Customer complaints" section of this note.

2.DEF NOTES None.

Check the connections for injector no. 2.

Check the connectors on the engine management computer.
Repair if necessary.

Check the continuity of the following connections:

Engine management computer, connector C track H4 track 2 Injector No. 2 connector
Engine management computer, connector C track H2 track 1 Injector No. 2 connector
Measure the resistance of injector no. 2.
Replace the injector if the resistance between tracks 1 and 2 is not: 0.33 Ω at + 20°°C/ 2 Ω maximum
If the fault persists, go to the injector fault finding procedure in the "Customer complaints" section of this note.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-84
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF101 CYLINDER 3 INJECTOR CIRCUIT

PRESENT 1.DEF : Overcurrent on injector energising current
OR 2.DEF : Low injector control current
STORED

Conditions for applying the fault finding procedure to stored faults:

If the fault reappears as present after:
– engine start.
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

1.DEF NOTES None.

Check the connectors for injector no. 3.

Check the connectors on the engine management computer.
Repair if necessary.

Measure the resistance of injector no. 3.

Replace the injector if the resistance between tracks 1 and 2 is not: 0.33 Ω at + 20°°C/ 2 Ω maximum
Check the insulation between the following two connections:
Engine management computer, connector C track G4 track 2 injector No. 3 connector
Engine management computer, connector C track D2 track 1 injector No. 3 connector
Check insulation against earth of the following connection:
Engine management computer, connector C track D2 track 1 of the injector No. 3
connector
If the fault persists, go to the injector fault finding procedure in the "Customer complaints" section of this note.

2.DEF NOTES None.

Check the connectors for injector no. 3.

Check the connectors on the engine management computer.
Repair if necessary.

Check the continuity of the following connections:

Engine management computer, connector C track G4 track 2 injector No. 3 connector
Engine management computer, connector C track D2 track 1 injector No. 3 connector
Measure the resistance of injector no. 3.
Replace the injector if the resistance between tracks 1 and 2 is not: 0.33 Ω at + 20°°C/ 2 Ω maximum
If the fault persists, go to the injector fault finding procedure in the "Customer complaints" section of this note.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-85
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF102 CYLINDER 4 INJECTOR CIRCUIT

PRESENT 1.DEF : Overcurrent on injector energising current
OR 2.DEF : Undercurrent on the injector energising current
STORED

Conditions for applying the fault finding procedure to stored faults:

If the fault reappears as present after:
– engine start.
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

1.DEF NOTES None.

Check the connectors for injector no. 4.

Check the connectors on the engine management computer.
Repair if necessary.

Measure the resistance of injector no. 4.

Replace the injector if the resistance between tracks 1 and 2 is not: 0.33 Ω at + 20 °C/ 2 Ω maximum.
Check the insulation between the following two connections:
Engine management computer, connector C track H3 track 2 injector No. 4 connector
Engine management computer, connector C track H1 track 1 injector No. 4 connector
Check insulation against earth of the following connection:
Engine management computer, connector C track H1 track 1 of the injector No. 4
connector
If the fault persists, go to the injector fault finding procedure in the "Customer complaints" section of this note.

2.DEF NOTES None.

Check the connectors for injector no. 4.

Check the connectors on the engine management computer.
Repair if necessary.

Check the continuity of the following connections:

Engine management computer, connector C track H3 track 2 injector No. 4 connector
Engine management computer, connector C track H1 track 1 injector No. 4 connector
Measure the resistance of injector no. 4.
Replace the injector if the resistance between tracks 1 and 2 is not: 0.33 Ω at + 20°°C/ 2 Ω maximum....
If the fault persists, go to the injector fault finding procedure in the "Customer complaints" section of this note.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-86
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF104 heating element RELAY NO. 2

PRESENT CC.1 : Short circuit to + 12 V
OR CO.0 : Open circuit or short circuit to earth
STORED

Conditions for applying the fault finding procedure to stored faults:

If the fault reappears as present after:
– actuator command AC302 "Heating element relay No. 2".

Special notes:
NOTES Use Elé. 1613 bornier for all operations on the engine management computer
connectors.
The heating element no. 2 relay (or additional heater relay 2), supplies two heating
elements in parallel.
Refer to the "Wiring diagrams" Technical Note for your vehicle to locate the relevant
fuses and relays.

CC.1 NOTES None.

Check the connectors of "additional heater 2" relay.

Check the connectors on the engine management computer.
Repair if necessary.

Check that the "additional heater 2" relay is correct (with relay removed):
– Insulation between tracks 3 and 5.
– Resistance of the relay coil between its tracks 1 and 2: 90 Ω ± 5 at +20 °C.
– Replace the relay if its resistance does not match this value.
Check for the insulation against + 12 V of the connection between:
Engine management computer, connector B track H1 track 2 additional heater 2 relay
mounting
Also check this connection is insulated against the following connections:
"Additional heater 2" relay mounting, track 1 + 12 V "after relay"
"Additional heater 2" relay mounting, track 3 + 12 V battery

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-87
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF104

CONTINUED

CO.0 NOTES None.

Check the connectors of "additional heater 2" relay.

Check the connectors on the engine management computer.
Repair if necessary.

– Check the resistance of the "additional heater 2" relay coil between tracks 1 and 2:
– Replace the relay if its resistance is not 90 Ω ± 5 at + 20°°C.
Check the continuity and insulation against earth of the connection between:
Engine management computer, connector B track H1 track 2 additional heater 2 relay
mounting
Check the presence of + 12 Volts "after relay" on track 1 of additional heater relay mounting 2.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-88
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF106 DAMPER-VALVE CIRCUIT

PRESENT CC.1 : Short circuit to + 12 V
OR CO.0 : Open circuit or short circuit to earth
STORED

Conditions for applying the fault finding procedure to stored faults:

If the fault reappears as present after:
– actuator command "AC593: Damper valve".
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

CC.1 NOTES None.

Check the connectors of the damper valve solenoid valve.

Check the connectors on the engine management computer.
Repair if necessary.

Check the resistance of the coil in the damper valve solenoid valve between tracks 1 and 2.
Replace the solenoid valve if its resistance is not 46 Ω ± 3 at 25°°C.
Check for the insulation against + 12 V of the connection between:
Engine management computer, connector C track A1 track 1 solenoid valve
connector.
If the fault persists, change the damper valve solenoid valve.

CO.0 GR1 NOTES None.

Check the connectors of the damper valve solenoid valve.

Check the connectors on the engine management computer.
Repair if necessary

Check the continuity and insulation against earth of the connection between:
Engine management computer, connector C track A1 track 1 solenoid valve
connector.
Check the resistance of the coil in the damper valve solenoid valve between tracks 1 and 2.
Replace the solenoid valve if its resistance is not 46 Ω ± 3 at 25°°C.
Check for the presence of + 12 Volts on track 2 of the connector on the damper valve solenoid valve.
If the fault persists, change the damper valve solenoid valve.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-89
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF107 SWIRL VALVE

PRESENT CC.1 : Short circuit to + 12 V
OR CO.0 : Open circuit or short circuit to earth
STORED 1.DEF : Jammed valve or jammed control solenoid valve

Conditions for applying the fault finding procedure to stored CC.1 or CO.0:
If the fault reappears as present after:
– actuator command AC594: Swirl valve.
NOTES
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

CC.1 NOTES None.

Check the swirl solenoid valve connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check the resistance of the coil in the damper valve solenoid valve between tracks 1 and 2.
Replace the solenoid valve if its resistance is not 46 Ω ± 3 at 25°°C.
Check for the insulation against + 12 V of the connection between:
Engine management computer, connector C track B1 track 1 solenoid valve
connector.
If the fault persists, replace the turbulence valve solenoid valve.

CO.0 NOTES None.

Check the wiring of the swirl solenoid valve.

Check the connectors on the engine management computer.
Repair if necessary.

Check the continuity and insulation against earth of the connection between:
Engine management computer, connector C track B1 track 1 solenoid valve
connector.
Check the resistance of the coil in the damper valve solenoid valve between tracks 1 and 2.
Replace the solenoid valve if its resistance is not 46 Ω ± 3 at 25°°C.
Check for the presence of + 12 Volts on track 2 of the connector on the turbulence valve solenoid valve.
If the fault persists, replace the turbulence valve solenoid valve.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-90
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults
G9T

DF107

CONTINUED

Priority in the event of a number of faults:

Treat as a priority the fault DF019 "Air flow circuit sensor"
or DF077 "EGR valve" or DF205 "Air intake circuit" if at
least one of the three faults is present or stored.

Conditions for applying the fault finding procedure to

1.DEF stored:
The fault reappears after:
1.DEF NOTES – clearing the fault from the memory,
– a road test at a speed > of 3500 rpm, a fuel flow > of
59 mm 3 /stroke, an atmospheric pressure > of 996 hPa
(minimum 4 seconds under these conditions to read the
fault).

Special notes:
Use Elé. 1613 bornier for all operations on the engine
management computer connectors.

Check the connectors on the swirl solenoid valve.

Check the connectors on the engine management computer.
Repair if necessary.
Check the resistance of the coil in the damper valve solenoid valve between tracks 1 and 2.
Replace the solenoid valve if its resistance is not 46 Ω ± 3 at 25°°C.
Check the continuity and absence of interference suppresser on the connection between:
Engine management computer, connector C track B1 track 1 swirl flap solenoid
valve connector

If these checks do not indicate any anomaly, perform the command interpretation diagnostic: AC594 "swirl
flap".

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-91
 EDC15C13 DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF108 BRAKE INFORMATION
PRESENT 1.DEF : Consistency with redundant brakes
OR
STORED

Conditions for applying the fault finding procedure to

stored faults:
If the fault reappears as present after:
– the brake pedal is pressed.
1.DEF NOTES

Special notes:
Use Elé. 1613 bornier for all operations on the engine
management computer connectors.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-92
 EDC15C13
DIESEL INJECTION SYSTEM
13B
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF 108

CONTINUED

From the "state list" menu, check "ET154" and "ET120" and check:
– brake pedal in rest position ET154 = "RELEASED" and ET120 = "ABSENT"
– brake pedal depressed ET154 = "PRESSED" and ET120 = "PRESENT"

"ET154" has it been correctly recognised?

NO
YES
YES Clear the fault
has "ET120" been correctly recognised? End of fault finding
NO

Check the brake pedal switch connectors, the ABS - electronic stability program computer connectors
and the engine management computer connectors.
Repair if necessary.
the presence of + 12 V after ignition on track B1 of the brake pedal switch connector and fuse state
F16 (15A).
Disconnect the anti-lock braking system - electronic stability program and check the continuity
andinsulation of the following connection against + 12 volts and earth:
Brake pedal switch connector track A3 track 17 ABS / ESP computer connector
Check the brake pedal switch is working correctly:
– at rest: infinite resistance between tracks B1 and A3; pressed: continuity between tracks B1
and A3
Replace the switch if necessary.
If the fault persists, do anti-lock braking system - electronic stability program diagnostics; if no
irregularity is detected, then do multiplexed network diagnostics.

Check the brake pedal switch connectors and the engine management computer connectors.
Repair if necessary.
Check the condition and adjustment of the brake pedal switch. Repair if necessary.
Check for the presence of + 12 V after ignition on track B1 of the brake pedal switch connector and
fuse state F16 (15A).
Disconnect the automatic transmission computer and check the continuity and insulation of the
following connection against + 12 volts and against earth:
Engine management computer, connector A track B4 track A3 brake pedal
switch connector
Check the brake pedal switch is working correctly:
– at rest: infinite resistance between tracks B1 and A3; pressed: continuity between tracks B1
and A3
Replace the switch if necessary.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.
EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-93
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF113 REFRIGERANT PRESSURE SENSOR CIRCUIT

PRESENT 1.DEF : Refrigerant fluid pressure sensor voltage too low
OR 2.DEF : Refrigerant fluid pressure sensor voltage too high
STORED 3.DEF : Refrigerant fluid pressure sensor power supply fault

Conditions for applying the fault finding procedure to stored faults:

The fault reappears after:
– clearing the fault from the memory,
– ignition off, followed by loss of communication with the fault finding tool,
– ignition on, followed by communication established with the fault finding tool,
NOTES
– an engine start, followed by the air conditioning switched on.

Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

1.DEF
NOTES None.
2.DEF

Check the refrigerant fluid pressure sensor connectors.

Check the connectors on the engine management computer.
Repair if necessary.

Check the conformity of the coolant pressure sensor signal by comparing* the value displayed by the tool
("parameter" screen or "engine cooling fan function": PR192 "refrigerant pressure") with a filling station
high pressure gauge reading:
A - If the values do not coincide:
– Check the insulation, continuity and for the absence of interference suppresser on the connections
between:
Engine management computer, connector B track E4 track A refrigerant fluid pressure
sensor connector
Engine management computer, connector B track E3 track C refrigerant fluid pressure
sensor connector
Engine management computer, connector B track E2 track B refrigerant fluid pressure
sensor connector
– Check the conformity of the refrigerant fluid pressure sensor power supply:
+5V track B
Earth track A
B - If the values coincide:
– Perform fault finding on the air conditioning system (see Section 6 of the Workshop Repair Manual).
*Note:
The fault finding tool displays the absolute pressure, the filling station high pressure gauge displays the
relative pressure (the difference between them is ~ 1 bar (1000 hPa), i.e. the atmospheric pressure).

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-94
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF113
CONTINUED

Priority in the event of a number of faults:

3.DEF NOTES Deal first with fault DF091 "Sensor supply n˚2 voltage" if
present or stored.

Check the insulation of the following connections:

Engine management computer, connector B track E4 track A refrigerant fluid pressure
sensor connector
Engine management computer, connector B track E3 track C refrigerant fluid pressure
sensor connector
Engine management computer, connector B track E2 track B refrigerant fluid pressure
sensor connector
Check the refrigerant fluid pressure sensor power supply:
+5V track C
Earth track A
– It the power supply and connections are okay, replace the refrigerant fluid pressure sensor (see the
procedure in Section 6 of the Workshop Repair Manual).

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-95
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF118 CRUISE CONTROL/SPEED LIMITER

PRESENT 1.DEF : Cruise control switch voltage
OR 2.DEF : Plausibility of deceleration
STORED 3.DEF : Plausibility of cruise control switch/speed limiter

All operations on the unions beneath the steering wheel

centre cover require the air bag computer to be locked.

Special notes:
Refer to the "Wiring diagrams" Technical Note for your
1.DEF NOTES
vehicle to locate the connections and sockets concerned.

Stored fault diagnostic application conditions:

If the fault reappears as present after:
– the steering wheel controls being pressed.

Display the "PR047: Cruise control lever switch voltage": without pressing the steering wheel controls, the
voltage displayed should be: 4.9 V ± 0.2.

If the voltage is not in this region, disconnect the steering wheel control (black union 2 tracks beneath the
steering wheel centre cover) and display PR047 again.
If the voltage moves to 4.9 volts ± 0.2, go to Step 1.
If the voltage does not change, check the engine management computer connectors. Repair if necessary. If
the fault persists, go to step "a".
1 - Check the conformity of the steering wheel controls as follows: disconnect the black connector 2 tracks
beneath the steering wheel centre cover (ohmmeter linked to steering wheel control side); the measure
displayed should be:
900 Ω (±± 10 Ω ) when "Restart" control pressed"
(or the one touch control "R" on the right of the steering wheel)
0 Ω (0.8 Ω max) when "Suspend" control pressed
(or the one touch control "O" on the right of the steering wheel)
300 Ω (±± 10 Ω ) when "Set+" control is pressed
(or the one touch control on the left of the steering wheel)
100 Ω (±± 10 Ω ) when "Set-" control is pressed
(or the one touch control on the left of the steering wheel)
Infinite resistance in rest position.
– If the values are not correct change the controls on the steering wheel
– If the values are correct: carry out the same procedure from connector A of the engine management
computer by connecting the ohmmeter between tracks A2 and B2 (connected steering wheel control
union).
a - If the fault persists, check the connection: engine management computer union beneath steering wheel,
using the relevant wiring diagram (line resistance, open circuit, short circuit, etc.). Carry out the necessary
repairs.
b - If the values are correct, clear the fault, switch off the ignition, wait until the end of the power latch phase*
and switch the ignition back on.
If the fault reappears (after pressing the steering wheel controls), contact the Techline.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.
EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-96
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF118

CONTINUED

Priority in the event of a number of faults:

Deal with faults DF073 or DF071: "Pedal sensor" or
2.DEF NOTES
"DF095: Vehicle speed sensor" first if at least one of the
three is present.

Check the conformity of the accelerator pedal sensor "PR005, 009, 092, 093".
Check the connectors on the engine management computer.
Repair if necessary.
Do ABS - electronic stability program fault finding.

3.DEF NOTES None.

Check the connectors on the on/off switch of the cruise control/speed limiter.
Check the connectors on the engine management computer.
Repair if necessary.

Check the operation of the on/off switch of the speed limiter / cruise control using an ohmmeter:

Switch in rest position:

Insulation between tracks A2 and A3
Insulation between tracks A2 and B1
Switch on "cruise-control"
Switch on "governor" position:
position:
Insulation between tracks A2 and A3
Insulation between tracks A2 and B1
Continuity between tracks A2 and B1
Continuity between tracks A2 and A3

If the on/off switch is incorrect, replace the switch.

If the on/off switch is correct, check the continuity and the absence of interference suppresser on the following
connections:
Engine management computer, connector A track F2 track B1 of the cruise control/speed
limiter connector.
Engine management computer, connector A track D2 track A3 of the cruise control/speed
limiter connector
Also check the insulation between these two connections and their insulation against + 12 volts.
Carry out the necessary repairs.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-97
 EDC15C13 DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
FLOW AT SELF-TEST AFTER IGNITION SWITCHED OFF
DF141 1.DEF : Inconsistency with engine speed
STORED

Priorities when dealing with a number of faults:

1.DEF NOTES Deal with any other fault that is present or stored as a
priority.

The computer uses different strategies to switch off the engine. Either by setting the fuel flow to 0 (with the
regulator) or by injector cut-out.
If, during the power latch phase, the engine speed does not fall below a certain value (~ 300 rpm) within a very
short time (<2 seconds) this fault will appear as stored.
Therefore eliminate all mechanical, hydraulic or other factors that may cause the engine to keep turning after
the ignition has been switched off must be eliminated.
Check:
– that there are no leaks from the injector nozzles. Refer to injector diagnostic in section "Customer
complaints" of this note,
– the operation of the fuel pressure (or flow) solenoid valve. Refer to diagnostic AC006 "interpretation of
commands",
– proper functioning of the damper valve (if installed). Refer to diagnostic AC593 "interpretation of
commands",
Perform the necessary operations, clear the fault and then carry out the instructions again.
If the fault persists, contact the Techline.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-98
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF173 INJECTOR CODE PROGRAMMING

PRESENT 1.DEF: No code stored
OR 2.DEF: Internal electronic fault during programming
STORED

Conditions for applying the fault finding procedure to stored faults:

The fault reappears after:
– The fault has been cleared from memory.
– The ignition has been switched off.
NOTES – Power latch* has finished and the ignition is switched back on.

Special notes:
If the fault is present, the injection flow rate will be limited, and the vehicle will be limited
in power.

1.DEF NOTES None.

This fault appears on any blank computer (new or freshly reprogrammed).

– Program the injector codes using:
either command SC004: "Injector calibration data input",
or command SC007: "Data write after replacing computer"
(refer to the procedures outlined in the Help section).
– After the codes have been written:
– Switch off the engine.
– Wait until the end of power latch* and switch the ignition back on.
– Set up communications and clear the fault memory.
– End of operation.
If the fault persists, contact the Techline.

Important: If fault DF173 is still present after performing the above fault finding procedure, check that the power
latch is performed whenever the ignition is switched off.
To check this, switch off the ignition and wait for 2 seconds until the immobiliser warning light flashes.
If the immobiliser warning light flashes as soon as the ignition is switched off, the power latch is no longer
effective, and the injection computer cannot store information in memory (programming, configurations, etc.).
This failure may be due to changes made to the vehicle's electrical wiring.
Check the wiring harness and examine whether any branch-connections have been made on the following
connection:
– Impact sensor track 3 Track 1 main power supply relay of the injection computer.
Repair if necessary.
If all these checks are ineffective and the fault is still present, contact the Techline.

* the immobiliser warning light will flash for a few seconds after switching off the ignition.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-99
 EDC15C13 DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF173

CONTINUED

2.DEF NOTES None.

– Switch off the engine.

– Wait until the end of power latch*, then switch the ignition back on.
– Establish communication.
If the fault was previously stored, clear the fault memory and end the operation.
If the fault is still present, contact the Techline.

* the immobiliser warning light will flash for a few seconds after switching off the ignition.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-100
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF175 COMPUTER
PRESENT 1.DEF: Fault in EEPROM
OR
STORED

1.DEF NOTES None.

If the fault is stored or present, clear the fault from the computer memory.
Switch off the ignition, wait until the end of power latch* then switch the ignition back on and re-establish
dialogue.
If the fault recurs, contact the Techline.

DF176 COMPUTER
PRESENT 1.DEF: Overvoltage in the capacitor controlling the injectors
OR 2.DEF: Undervoltage in the capacitor controlling the injectors
STORED

Check the conformity of 12 volts of the battery in

1.DEF tracks M2 and M3, connector B of the engine management
NOTES
2.DEF computer (excess voltage or micro-cuts).
If necessary, check the charging circuit.

IMPORTANT:
A badly insulated or incorrectly positioned engine wiring harness may be susceptible to disruption caused by
the voltage supply to the starter. This electrical interference disrupts the engine speed signal and causes this
fault. It is often intermittent but is always accompanied by failure of the engine to start.
In the starting phase, check with the oscilloscope that there is no interference on the engine speed signal
during the first engine rotations.
In case of interference:
check that the engine wiring and starter motor are correctly positioned.
check that the engine speed signal connection is correctly cabled.

If the fault persists:

Carefully check the clips and tabs of the connections for each injector.

If the fault persists:

Clear the fault from the computer memory.
Switch off the ignition, wait for the end of the power latch*, then switch the ignition back on.
Start the engine and re-establish dialogue:
If the fault recurs, contact the Techline.

* The immobiliser warning light will flash for a few seconds after switching off the ignition.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-101
 EDC15C13 DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults 13B
DF177 COMPUTER
PRESENT 1.DEF : Fault in the analogue/digital converter
OR
STORED

1.DEF NOTES None.

If the fault is stored or present, clear the fault from the computer memory.
Switch off the ignition, wait for the end of the power latch*, then switch the ignition back on. Start the engine
and re-establish communication.
If the fault recurs, contact the Techline.

DF178 COMPUTER
PRESENT 1.DEF : Fault in the microregulator
OR 2.DEF : Data inconsistency
STORED

Priorities when dealing with a number of faults:

1.DEF If one of faults DF095: "Vehicle speed signal 2.DEF" or
NOTES
2.DEF DF098: "Main relay" is present or stored, treat it as a
priority.

If the fault is stored or present, clear the fault from the computer memory.
Switch off the ignition, wait for the end of the power latch*, then switch the ignition back on. Start the engine
and re-establish dialogue:
If the fault recurs, contact the Techline.

* The immobiliser warning light will flash for a few seconds after switching off the ignition.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-102
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF179 COMPUTER
PRESENT 1.DEF : Fault in the stabilised voltage regulator
OR 2.DEF : Fault in the stabilised voltage regulator
STORED

1.DEF
NOTES None.
2.DEF

If the fault is stored or present, clear the fault from the computer memory.
Switch off the ignition, wait for the end of the power latch*, then switch the ignition back on. Start the engine
and re-establish communication.
If the fault recurs, contact the Techline.

DF180 COMPUTER
PRESENT 1.DEF : Internal fault on channel after ignition
OR
STORED

Priorities when dealing with a number of faults:

1.DEF NOTES Deal first with the DF098: "Main relay" fault if it is present
or stored.

If the fault is stored or present, clear the fault from the computer memory.
Switch off the ignition, wait for the end of the power latch*, then switch the ignition back on. Start the engine
and re-establish communication.
If the fault recurs, contact the Techline.

* The immobiliser warning light will flash for a few seconds after switching off the ignition.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-103
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF196 DIESEL FUEL WATER DETECTOR

PRESENT 1.DEF : Open circuit on the line or water in the diesel fuel
OR
STORED

Conditions for application of the fault finding

1.DEF NOTES procedure:
When fault stored or present.

A) Make sure the diesel fuel water detection sensor is properly connected.
– If not, clear the fault,
– Carry out a road test (speed > 12 mph (20 km/h) and engine speed > 1200 rpm) for more than 30 seconds.
– If the fault does not recur, end the fault finding procedure.
– If the fault reappears, go to step B.

B) If the sensor is properly connected:

– Bleed the diesel filter unit (see Workshop Repair Manual Section 13A).
– Clear the fault.
– Start the vehicle (engine speed > 750 rpm) and wait 60 seconds to confirm repair.
C)If the fault recurs:
– Check the continuity and the absence of interference suppresser on the connection between:
Engine management computer, connector A track B3 track 3 of the water detection sensor
– Check the power supply of the water detection sensor:
+ 12 V after relay track 1 of the water detection sensor
earth track 2 of the water detection sensor
– Carry out the necessary repairs.
If all these checks reveal no irregularity:
– Replace the water detection sensor (Workshop Repair Manual Section 13A).
– Clear the fault.
– Start the vehicle (engine speed > 750 rpm) and wait 60 seconds to confirm repair.
Note:
When the water level in the fuel filter unit is below the sensor's electrodes, some driving conditions (turning, a
slope) may cause the injection fault warning light to come on erroneously (this is because the sensor's off-
centre position in the fuel filter unit, combined with the driving condition forces, cause water detection and
hence the light comes on).

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-104
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

MISFIRING
DF204
PRESENT 1.DEF: cylinder No. 1
OR 2.DEF: cylinder No. 2
STORED 3.DEF: cylinder No.3
4.DEF: cylinder No. 4

Conditions for applying the fault finding procedure to stored faults:

The fault reappears after:
– the fault memory has been cleared,
– an engine start with the water temperature ≥ 50°C followed by a time delay of
3 minutes at idling speed.

Priorities when dealing with a number of faults:

Firstly, deal with the following faults:
DF072 : FUEL PRESSURE SIGNAL, present or stored.
NOTES DF099 : CYLINDER 1 INJECTOR CIRCUIT, present or stored.
DF100 : CYLINDER 2 INJECTOR CIRCUIT, present or stored.
DF101 : CYLINDER 3 INJECTOR CIRCUIT, present or stored.
DF102 : CYLINDER 4 INJECTOR CIRCUIT, present or stored.

Special notes:
If the IMA function is "Active", check consistency between the injector codes stored in
memory and those engraved on each injector.
Check for insulation, continuity and the absence of interference suppresser by
referring to the section on "Injector fault finding aid".

Before replacing an injector, check that its sealing washer is

in place and in order.
After replacing an injector, and if the IMA is active, follow
the injector code programming procedure (refer to Help
1.DEF
section).
2.DEF
NOTES
3.DEF
4.DEF
WARNING
To remove/refit injectors, obey the cleanliness and safety
instructions (see Section 13B of the Workshop Repair
Manual).

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-105
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF204

CONTINUED

1) If a single cylinder is declared in "misfiring" state:

– Check the condition of the engine with the "Checking cylinder balance" test available on the CLIP tool.
– If the 4 cylinders have the same stroke speed, replace the injector identified by the fault.
– If there is a difference between the cylinders, check the compression of the cylinder in
question.
– If the compression is faulty, make the necessary repairs.
– If the compression is correct, replace the injector concerned.*
– After the operation, clear the fault and carry out a test with the engine at idling speed, engine coolant
temperature > 50°°C for 2 minutes and check that no fault appears on the fault finding tool to confirm the
repair.
2) If several cylinders are declared in "misfiring" state:
– Select the "Function" menu on the fault finding tool.
– Select the "Fuel pressure regulation" function.
– With the engine idling, engine coolant temperature > 50°°C for 2 minutes, display the flow adjustment
values injector by injector, i.e. PR524, 525, 589 590 and 525 (FUEL FLOW ADJUSTMENT CYLINDER No.
1, No. 2, No. 3 and No. 4).
The normal flow adjustment value for an injector is approximately ± 1 mm3 . This tolerance value may be
increased with time, but indicates an injector/cylinder fault if it exceeds ± 5 mm3 .
a) If at least one of these values ≥ ± 5 mm 3:
– Check the condition of the engine with the "Checking cylinder balance" test available on the CLIP tool.
– If the 4 cylinders have the same speed, replace the injector with the greatest correction
possible.
– If there is a difference between the cylinders, check the compression with a flow adjustment
furthest from the normal value.
– If the compression test reveals a cylinder fault, carry out the necessary repairs.
– If the compression is correct, replace the injector of the cylinder concerned.*
– Clear the fault and carry out a test with the engine idling, engine coolant temperature > 50°°C for
2 minutes, and check that no fault is displayed on the fault finding tool and that the adjustment values do
not reach ± 5 mm3 to confirm the repair.
– If an(other) cylinder(s) is (are) still declared in misfiring state, repeat starting at "2" (or "1").
– If the fault does not recur, end the fault finding procedure.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-106
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

AIR INTAKE CIRCUIT (formerly DF078)

DF205
CC.1 : Turbocharging solenoid valve in short circuit to + 12 V
PRESENT
CO.0 : Turbocharging solenoid valve in open circuit or short circuit to earth
OR
1.DEF : Lack of air in the intake circuit
STORED
2.DEF : Turbocharging pressure too high

Conditions for applying the fault finding procedure to stored faults:

For CC.1 or CO.0, of the fault reappears after:
– the fault has been cleared from memory.
– running the valve via command AC004 "Turbocharging limitation valve"

For 1.DEF or 2.DEF, if the fault is reported present after:

NOTES
– engine start
– carrying out a road test.
–
Special notes:
Use Elé. 1613 bornier for all operations on the engine management computer
connectors.

CC.1 NOTES None.

Check the connections of the turbocharging limitation solenoid valve.

Check the connectors on the engine management computer. Repair if necessary.

Check the resistance of the wastegate solenoid valve between tracks 1 and 2.
Replace the solenoid valve if its resistance is not:
15.4 Ω ± 0.7 at 20°°C for a Pierburg solenoid valve.
16.5 Ω ± 1.6 at 25°°C for a Bitron solenoid valve.

Check for the insulation against + 12 V of the connection between:

Engine management computer, connector B track L2 track 1 turbocharging limitation
solenoid valve connector

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-107
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF205

CONTINUED 1

CO.0 NOTES None.

Check the connections of the turbocharging limitation solenoid valve.

Check the connectors on the engine management computer. Repair if necessary.

Check the resistance of the wastegate solenoid valve between tracks 1 and 2.
Replace the solenoid valve if its resistance is not:
15.4 Ω ± 0.7 at 20°°C for a Pierburg solenoid valve.
16.5 Ω ± 1.6 at 25°°C for a Bitron solenoid valve.

Check the continuity and insulation against earth of the connection between:
Engine management computer, connector B track L2 track 1 turbocharging limitation
solenoid valve connector
Check for the presence of + 12 V "after relay" on track 2 of the turbocharging limitation solenoid valve
connector.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-108
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF205

CONTINUED 2

Priorities when dealing with a number of faults:

Treat as a priority the following faults, present or stored:
DF205 "Air intake circuit" CO.0 or CC.1, DF077 EGR
1.DEF NOTES
valve: CO.0, DF074 Turbocharger pressure sensor, CO.0
or 2.DEF, DF019 Air sensor intake air flowmeter circuit:
2.DEF.

Check the connections of the turbocharging limitation solenoid valve.

Check the connectors on the engine management computer. Repair if necessary.
Check the continuity and absence of interference suppresser on the connection between:
Engine management computer, connector B track L2 track 1 of the solenoid valve connector.
12 V after injection relay track 2 of the solenoid valve connector.

Check the resistance of the turbocharging limitation solenoid valve between tracks 1 and 2:
If the resistance is incorrect, replace the solenoid valve.
15.4 Ω ± 0.7 at 20°°C for a Pierburg solenoid valve.
16.5 Ω ± 1.6 at 25°°C for a Bitron solenoid valve.

Check the sealing of the high pressure air circuit:

Pipe not joined or pierced, pressure sensor disconnected or poorly fitted (seal present), exchanger pierced.
To test the exchanger: stabilise the engine speed between 3500 and 4000 rpm with the vehicle stopped and
check that there are no leaks.

Check the operation of the turbocharger and its control circuit: diagnostic AC004 "Turbocharging
limitation valve" from step n˚1.

Check that the exhaust gas recirculation valve is not stuck open:
– Engine stopped, ignition switched off,
– Disconnect the connector and remove the exhaust gas recirculation valve:
– If removal reveals that the valve is blocked in the open position, replace the exhaust gas recirculation valve.
– Otherwise, with the valve removed and connected:
– Turn on the ignition and launch communication,
– Activate the command AC007 "EGR valve" and check:
– The movement of the valve, (valve travel according to the Opening Cyclic Ratio:
0 to 2.5 mm at 25 % and from 6 to 7 mm at 75 %).
– Closing when the command is completed.
If this check shows that the valve is stuck or seized beyond repair, replace the exhaust gas recirculation
valve.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-109
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of faults

DF205

CONTINUED 3

Priorities when dealing with a number of faults:

2.DEF NOTES If fault DF074 "Turbocharging pressure sensor, CC.1" is
present or stored, treat it as a priority.

Check the connections of the turbocharging limitation solenoid valve.

Check the connectors on the engine management computer.
Repair if necessary.
Check for the continuity and absence of interference suppresser on the connection between:
Engine management computer, connector B track L2 track 1 turbocharging limitation
solenoid valve connector
Check for the presence of + 12 V "after relay" on track 2 of the turbocharging limitation solenoid valve
connector.
Check the resistance of the turbocharging limitation solenoid valve between tracks 1 and 2:
Replace the solenoid valve if it resistance is not:
15.4 Ω ± 0.7 at 20°°C for a Pierburg solenoid valve.
16.5 Ω ± 1.6 at 25°°C for a Bitron solenoid valve.

● Make sure the turbocharger limit solenoid valve is not blocked open:
– With the engine stopped, disconnect the inlet and outlet hoses from the solenoid valve,
With a Pierburg solenoid valve:
– Connect a vacuum pump to the inlet union and apply vacuum pressure,
– If the vacuum pressure is not maintained: replace the solenoid valve.
With a Bitron solenoid valve:
– Fit a plug to the solenoid valve outlet union,
– Connect a vacuum pump to the inlet union and apply vacuum pressure,
– If the vacuum pressure is held: replace the solenoid valve.

● Check that the turbocharger control rod has not seized:

– With the engine stopped, make sure the turbocharger control rod is in the resting position,
– Apply a vacuum of 800 mbar ± 100 to the hoses connected to the turbocharger control diaphragm.
– If the diaphragm maintains the vacuum, check the movement and setting of the turbocharger control shaft
(Workshop Repair Manual Section 12B).
If the control rod is seized, replace the turbocharger.

Deal with any other possible faults. Clear the fault memory.
AFTER REPAIR Switch the ignition off and carry out a road test followed by a check with the fault finding
tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-110
 EDC15C13 DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Conformity check 13B
Take a fault reading before carrying out this conformity check.
NOTES
Test conditions: engine stopped, ignition on.

Parameter or Status
Order Function Display and notes Fault finding
Checked or Action

ET001: Computer State: PRESENT

1 Battery voltage + after ignition
feed

ET003: Engine state: INACTIVE

immobiliser The computer is locked! In the event of problems,
Engine
2 ET133: Code State: YES refer to the engine
immobiliser
programmed The computer has a immobiliser diagnostic
code in memory!

ET157: Synchronisation State: STANDBY, Any phase displacement

then becomes between the camshaft
performed once the sensor and the TDC
engine is started. sensor (slack belt or
distribution delay) gives
Synchronisation rise to the lifting of DF070:
(between "Camshaft sensor/engine
3 camshaft sensor speed coherence".
and engine If starting is impossible:
speed sensor) during running under the
starter motor the state
becomes "UNDERWAY",
and will only become
"PERFORMED." if the
engine starts

ET027: Pre/postheating State: ACTIVE as soon

relay control as the ignition is
switched on and until the
4 Pre/postheating end of pre/postheating None.
ET011: Postheating State: PRESENT as
signal soon as pre/postheating
is completed

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-111
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Conformity check

Take a fault reading before carrying out this conformity check.

NOTES
Test conditions: engine stopped, ignition on.

Parameter or Status
Order Function Display and notes Fault finding
Checked or Action

ET105: Low pressure State: ACTIVE, – This function primes the

pump relay as soon as the ignition low pressure circuit on
Priming pump control is switched on. starting.
Becomes: INACTIVE, – If the temperature is
5 (+ high pressure as soon as the engine below 0°C, the pump is
pump type CP3) is running, or after a few not operated!
seconds if the engine
does not start.

ET037: Low speed fan

assembly relay
control

ET038: High speed fan State: ACTIVE or

assembly relay INACTIVE.
control

ET106: heating element According to computer

6 Relay controls no. 1 relay control programming None.

ET107: heating element

no. 2 relay control

ET108: heating element

no. 3 relay control

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-112
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Conformity check

Take a fault reading before carrying out this conformity check.

NOTES
Test conditions: engine stopped, ignition on.

Parameter or Status
Order Function Display and notes Fault finding
checked or Action

ET142: Clutch pedal state: PRESSED or

RELEASED, If the clutch switch is not to
depending on which specification, the engine
pedals are pressed may race during gear
ET154: Brake pedal
changes.

ET120: Redundant brake PRESENT

pedal if ET154 = pressed
7 Switches
ABSENT
if ET154 = released
State: PRESENT if
reverse gear is
engaged

ET035: Reversing signal State: ABSENT if

(only on 4x4) neutral or forward gear None.
selected

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-113
 EDC15C13
DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Conformity check 13B
Take a fault reading before carrying out this conformity check.
NOTES
Test conditions: engine stopped, ignition on.

Parameter or Status
Order Function Display and notes Fault finding
checked or Action

PR004: Computer supply 12.4 V < X < 12.8 V

voltage
If there is a problem,
PR090: Sensor supply 4.9 V < X < 5.1 V test the battery and
8 Feed voltage voltage no. 1 carry out a fault finding
procedure on the
charge circuit.
PR091: Sensor supply 4.9 V < X <5.1 V
voltage no. 2

PR002: Coolant X = engine temperature In the event of a

temperature ± 5 °C problem, check that
the sensor is
functioning correctly by
PR003: Air temperature X = exterior temperature
comparing the
± 5 °C
temperature displayed
Temperature by the fault finding tool
9
sensors PR001: Fuel temperature PR003< PR001 < PR002 with that shown by a
(If PR001 is very near to "workshop"
PR002, test the injector temperature sensor.
return flow). NOTE: on some F9Q
engines, the fuel
temperature is fixed at
60°°C.

PR016: Atmospheric X = Atmospheric pressure In the event of a fault,

pressure check that the air flow
around the computer is
not obstructed.

PR082: Turbocharging X = ~ PR016

pressure For PR082 > PR016 carry
out the engine running
under load test.
10 Inlet pressure
PR081: Turbocharging X=~0 If PR081 is large, apply
pressure loop command
difference interpretation: AC004
"turbocharging
limitation valve".

PR094: Turbocharging X=5%

limitation valve
OCR*

* Opening Cyclic Ratio

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-114
 EDC15C13 DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Conformity check 13B
Take a fault reading before carrying out this conformity check.
NOTES
Test conditions: engine stopped, ignition on.

Parameter or Status
Order Function Display and notes Fault finding
checked or Action

Opening Cycle PR095: EGR valve OCR* X=5%

Ratio: In the event of a
problem, apply
11 Exhaust gas PR088: EGR valve X=~1V command interpretation
recirculation position feedback AC007 "EGR valve".
valve

PR083: Injector rail 0 < X < 2 bar

pressure If the engine has just
Diesel pressure
been stopped, wait a
PR097: OCR* rail pressure X=5%
regulation valve few seconds to obtain
12 this value.
PR202: Regulated fuel X = 25,000 mm3/sec
PR202 only for an
flow
engine fitted with a CP3
Fuel flow
PR033: Fuel flow 10 < X < 80 mm 3/ pump.
stroke

ACCELERATOR PEDAL NO LOAD

PR008: Pedal X = 0.71 V

potentiometer
voltage track 1
IMPORTANT:
PR005: Pedal load X=0% Approximately every
5 seconds the
PR092: Pedal load (track X=0%
computer performs a
no. 1)
test to set PR009 at
PR093: Pedal load (track X=0% 0 V.
no. 2) This corresponds to
normal operation.
PR009: Pedal track X = 0.35 V
potentiometer
Accelerator pedal voltage
13
sensor ACCELERATOR PEDAL FULL LOAD

PR008: Pedal X = 4.2 V

potentiometer
voltage track 1
IMPORTANT:
PR005: Pedal load X = 100 % Approximately every
5 seconds, the
PR092: Pedal load X = 134 %
computer performs a
(track no. 1)
test by setting PR009 to
PR093: Pedal load (track X = 134 % 0 V.
no. 2) This corresponds to
normal operation.
PR009: Pedal track X = 2.1 V
potentiometer
voltage

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-115
 EDC15C13
DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Conformity check 13B
Take a fault reading before carrying out this conformity check.
NOTES
Test conditions: ignition on or engine running.

Parameter or Status
Order Function Display and notes Fault finding
Checked or Action

PR047: Cruise control X = 5 V ± 0.2 V

switch voltage controls at rest
X = 0 V press "O"
X = 3 7 V press "R"
X = 2.5 V press "+" PR047 and ET150
X = 1.3 V press "-" vary at the same time
ET150: Cruise control/ Indicates the driver's Without pressure on
Speed limiter request, i.e.: the steering wheel
control,
Restart: press "R"
ET150 = INACTIVE.
Pause: press "O"
Less: press "-"
More: press "+"

ET036: Cruise control PRESS when the cruise

switch control switch is engaged

RELEASED when the + Illumination of the

Speed control button is in the rest position green warning light on
14
function or on "limitation" the instrument panel

ET141: Cruise control On if ET036 = pressed

OFF if ET036 = released

ET126: Speed limiter PRESS when the speed

switch limiter switch is engaged
+ Illumination of the
RELEASED when the
orange warning light
button is in the rest position
on the instrument
or on "cruise control"
panel
ET140: Speed limiting On if ET126 = pressed
OFF if ET126 = released

ET086: Cruise control: States 1, 2, 3, 4, 5, 6, 7, 8, 9

disconnection or 10: if the computer does
not authorise cruise control. Gives the reason why
cruise control is not or
Not applicable: if the no longer authorised.
computer authorises the
cruise control.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-116
 EDC15C13 DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Conformity check 13B
Take a fault reading before carrying out this conformity check.
NOTES
Test conditions: engine warm at idle speed, without electrical consumer.

Parameter or Status
Order Function Display and notes Fault finding
Checked or Action

If necessary consult the Workshop Repair Manual, Section 13B: "Injection/air conditioning programming".

If the injection authorises air conditioning:

ET117: AC authorised State: YES

In the event of a
ET102: Air conditioning State: YES problem with the fan
request assembly, apply
command
ET037: Low speed fan State: ACTIVE interpretation AC011:
assembly relay becomes: inactive, "Low-speed fan
control if PR192 ~ 20 bar
assembly relay" or
ET038: High speed fan State: INACTIVE AC012: "High-speed
assembly relay active if the refrigerant fan assembly relay".
control fluid pressure is
Air conditioning > ~ 20 bar
15
(selected)
PR006: Engine speed 850 rpm

If the injection does not authorise air conditioning:

ET117: AC authorised State: NO

ET102: Air conditioning State: YES

request

ET037: Low speed fan State: INACTIVE

assembly relay
control

PR006: Engine speed X = 850 rpm

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-117
 EDC15C13
DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Conformity check 13B
Take a fault reading before carrying out this conformity check.
NOTES The values listed below are examples only.
Test conditions: engine stopped, ignition on.

Parameter or Status
Order Function Display and notes Fault finding
checked or Action
PR006: Engine speed 850 rpm ± 50
None.
PR002: Pedal load above 85°°C
16 Engine speed PR062: Engine speed value 850 rpm ± 50 According to the
increase or decrease in
PR035: Idling speed X = 0 rpm ± 50 the fault finding tool
correction "configuration "menu.

VP 029: Decrease in specific Minimum value:

commercial vehicle 1000 rpm The adjustment can be
idling speed. made from 1000 to
Maximum value:
1300 rpm for rolling
2000 rpm
vehicle applications.

VP028: Increase in specific The increase or For any adjustment

This idling
commercial vehicle decrease takes place in above
speed is
idling speed. steps of 100 rpm 1300 rpm the user will
17 specific to
not be able to drive his/
Commercial
her vehicle during the
Vehicles.
activation phase of this
function, as the
computer will inhibit the
specific commercial
vehicle idling speed
(the vehicle will come
back to its own engine
idling speed).

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-118
 EDC15C13
DIESEL INJECTION SYSTEM
13B
Program No.: CB
Vdiag No: 19
Fault finding - Conformity check

Take a fault reading before carrying out this conformity check.

The values listed below are examples only. The ones for your vehicle may be found in
NOTES
its own fault finding note.
Test conditions: engine warm at idle speed, without electrical consumer.

Parameter or Status
Order Function Display and notes Fault finding
Checked or Action

PR083: Injector rail pressure X = ~ 300 bar The computer keeps

the injector rail
(~ 1350 bar max. with
pressure around its
foot hard down on the
"normal" value. If, at
accelerator under load).
idle speed, the
PR086: Injector rail loop X = ~ 0 bar "minimum/maximum
variance variation range"
exceeds 50 bar, check
Fuel pressure PR202: Regulated fuel flow X = ~ 1600 mm3/sec
18 the high pressure
and flow rate (CP3) circuit.

PR097: OCR* rail pressure X = ~ 30 %

regulation valve In the event of a
problem, apply
PR033: Fuel flow X = ~ 8 mm3/stroke
command
PR075: Fuel flow value at X = ~ 8mm3/stroke interpretation AC006.
idle speed

PR050: Air flow X = ~ 35 kg/h + 40 % of

measurement exhaust gas
recirculated
In the event of a
X = ~ 60 kg/h + 5 %
problem, refer to the
exhaust gas
19 Air flow interpretation of
recirculation
parameter
~10 kg/h engine
PR050.
stopped.
~ 480 kg/h laden with
full load.

PR095: EGR valve OCR* X = approx. 40 % to In the event of a

5% problem, apply
(depending on interpretation of
programming). command AC007:
"EGR valve".
20 Fraction valves PR094: Turbocharging X = ~ 50 % In the event of a
limitation valve problem, apply
OCR* command
interpretation: AC004
"Turbocharging
limitation valve".

* Opening Cyclic Ratio

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-119
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Conformity check

Take a fault reading before carrying out this conformity check.

NOTES
Test conditions: engine warm at idle speed.

Parameter or Status
Order Function Display and notes Fault finding
Checked or Action

PR002: Coolant if X ≥ 99°°C

In the event of a
temperature
then problem, apply
command
ET037: Low speed fan State CONFIRMED interpretation AC011
assembly relay The fan assembly or AC012.
should run at low speed.
Fan assembly When the temperature
PR002: Coolant If: X = 102°°C falls back to 89°°C, the
21 temperature low-speed fan
assembly is stopped
ET038: High speed fan State CONFIRMED
(the command state
assembly relay The fan assembly
becomes:
should run at high
"INACTIVE").
speed.

If necessary, consult Workshop Repair Manual section 13B: "Centralised coolant temperature
management"

ET006: heating element In the event of a

no. 1 relay control problem, apply
command
interpretation AC301,
AC302, AC002.

ET107: heating element Command states:

22 heating elements no. 2 relay control ACTIVE or INACTIVE,
(depending on depending on the If necessary, refer to
vehicle) heating element the Workshop Repair
command strategy. Manual, section 13B:
"heating element
ET108: heating element
programming."
no. 3 relay control

PR006: Engine speed 850 rpm

ET186: Electric State: ACTIVE

Electric windscreen de- (depending on de-icer
23 windscreen de- icer switch position) None
icer (if installed)
PR006: Engine speed 1000 rpm

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-120
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Conformity check

Take a fault reading before carrying out this conformity check.

NOTES
Test conditions: ignition on or engine running.

Parameter or Status
Order Function Display and notes Fault finding
Checked or Action

PR178: Swirl flap control 10 % in rest position, The swirl flap is activated
90 % activated if the coolant
temperature is > 80°°C,
Solenoid valve
engine speed between
controls
1500 and 2000 rpm and
fuel flow between 15 and
25 mm 3/stroke.

PR177: Damper valve control X = 0 % at rest, Activated when ignition

X = 100 % activated is switched off.

PR132: Air conditioning 100 % = inhibition Allowed depending on

Function
inhibition control 0 % = authorisation air-conditioning-related
control
programming.

PR127: Low pressure pump X = 0 % at rest,

relay control X = 100 % activated

PR131: Preheating relay

control

PR134: Low speed fan

24 assembly relay control

PR135: High-speed fan Activated according to

Relay controls assembly relay control the strategy associated
PR138: heating element relay with the function.
control n˚1

PR139: heating element

control relay n˚2

PR140: heating element

control relay n˚3

PR588: Radiator relay control

PR137: Water temperature

warning light control

Indicator light PR193: Injection fault warning X = 0 % at rest, Activated if problem

controls light control X = 100 % activated detected.

PR194: Serious injection fault

warning light control

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-121
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Conformity check

Take a fault reading before carrying out this conformity check.

NOTES
Test conditions: engine stopped, ignition on. ET003 Immobiliser inactive.

Parameter or Status
Order Function Display and notes Fault finding
checked or Action

AC301: heating element In the event of a

relay N°1 problem, apply
command
interpretation AC301.

AC302: heating element The relays should be In the event of a

no. 2 relay control heard operating (two problem, apply
25 heating elements
(depending on ~ 1 second ON-OFF command
vehicle) cycles). interpretation AC302.

AC002: heating element In the event of a

relay N°3 problem, apply
command
interpretation AC002.

AC004: Wastegate When entering the

(depending on command, maintain a
vehicle) vacuum pressure of In the event of a
Wastegate ~ 900 mbar at the valve problem, apply
26
control inlet to hear it operating command
and check operation of interpretation AC004.
the turbocharged
control diaphragm.

AC005: Low pressure The relays should be

pump relay control heard operating (five
27 Booster pump None.
(depending on 1 second ON-OFF
vehicle) cycles ~).

AC006: Fuel pressure Place your hand on the In the event of a

Fuel pressure solenoid valve (or solenoid valve to feel it problem, apply
28
regulator flow regulation operating. command
solenoid valve) interpretation AC006.

AC007: EGR valve Place your hand on the In the event of a

Exhaust gas
command except valve to feel it operating. problem, apply
29 recirculation
G9T724 command
valve
interpretation AC007.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-122
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Conformity check

Take a fault reading before carrying out this conformity check.

NOTES
Test conditions: engine stopped, ignition on. ET003 Inactive.

Parameter or Status
Order Function Display and notes Fault finding
checked or Action

AC010: Preheating relay Place an ampermetric Locate the faulty plug:

clamp on track 3 of the by measuring its
preheating relay and resistance: 0.6 Ohm
30 Preheating relay check that the power or, by measuring its
consumption is ~ 80 A. power consumption:
(five cycles of ~ 20 A/spark plug
2 seconds ~). (inrush current).

AC011: Low speed fan In the event of a

assembly relay problem with the fan
The relay concerned assembly, apply
should be heard command
operating (three interpretation
~2 second ON-OFF AC011.
31 Fan assembly
AC012: High speed fan cycles) and make sure In the event of a
assembly relay the fan assembly is problem with the fan
running at the set assembly, apply
speed. command
interpretation
AC012.

Warning lights:

Preheating AC212: Preheating The selected light

indicator light should come on In the event of a
(one ON-OFF cycle). problem, apply
Overheating AC213: Overheating
command
32 warning light
interpretation
level 1 AC595: Injection fault (these controls do not AC212, AC213,
warning light apply to some AC596 or AC596.
multiplexed vehicles).
level 2 AC596: Severe injection
fault warning light

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-123
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Conformity check

Take a fault reading before carrying out this conformity check.

NOTES
Test conditions: engine stopped, ignition on. ET003 Inactive.

Parameter or Status
Order Function Display and notes Fault finding
checked or Action

AC593: Damper valve While running these

(depending on the commands, maintain a
vehicle) vacuum pressure of
In the event of a
~900 mbar at the
AC594: Swirl flap problem, apply
solenoid valve input to
33 Valve controls (depending on the command
hear it operating and
vehicle) interpretation
check operation of the
AC593 or AC594.
valve concerned
(three ON-OFF cycles
of 2 seconds ~).

AC617: Power assisted The relays should be During the command,

steering pump heard operating (three keep the steering
assembly relay ON-OFF cycles of wheel turned to verify
Power assisted (depending on the ~2 seconds). power-assisted
steering pump vehicle) steering.
34
assembly relay
control Otherwise, apply
command
interpretation
AC617.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-124
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Status summary table

Tool Status Fault finding tool title

ET001 Computer after ignition feed
ET003 Engine immobiliser
ET011 Postheating signal
ET027 Pre/postheating relay control
ET036 Speed control switch
ET037 Low speed fan assembly relay control
ET038 High speed fan assembly relay control
ET086 Cruise control disconnection
ET102 Air conditioning request
ET105 Low pressure pump relay control
ET106 heating element relay control n˚1
ET107 heating element control relay n˚2
ET108 heating element control relay n˚3
ET117 Air conditioning authorised
ET120 Redundant brake pedal
ET133 Code programmed
ET142 Clutch pedal
ET154 Brake pedal
ET157 Synchronisation
ET186 Electric windscreen de-icer
ET224 Presence of water in the diesel fuel
ET225 First offset EGR programming

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-125
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

COMPUTER AFTER IGNITION FEED

ET001

"ABSENT" NOTES Ignition on

If the vehicle ignition is not on, the state ET001 must be set at "ABSENT" status
But as soon as the ignition is switched on the computer must be supplied. The state ET001 must therefore go
to "PRESENT".
If this state remains blocked on ABSENT, follow the procedure below:
– Check the integrity of fuse F4 (15A) in the engine fuse box and relay box.
– Check the continuity and absence of interference suppresser between:
Black connector of the engine fuse box and relay box track S4 Brown connector B track A1 of
the injection computer
Check the connections and the state of the contacts of brown connector B on the injection computer.
Repair if necessary.
If the fault persists, contact the Techline.

"PRESENT" NOTES Ignition on

Normal operating condition.

The computer is well supplied after the ignition has been switched on.

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-126
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

ENGINE IMMOBILISER
ET003

"ACTIVE" Refer to the Passenger Compartment fault finding note.

"INACTIVE" Refer to the Passenger Compartment fault finding note.

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-127
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

POSTHEATING SIGNAL
ET011

NOTES Check the battery voltage.

The state ET011 has an "ACTIVE" status as soon as the pre-postheating is

"ACTIVE" terminated . If the state ET011 remains constantly in "INACTIVE" status, refer to fault
DF081: "Preheating relay circuit".

The state ET011 has an "INACTIVE" status as long as the pre-postheating is not
"INACTIVE"
terminated.

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-128
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

PRE/POSTHEATING RELAY CONTROL

ET027

"ACTIVE"

When the ignition is switched on, the state ET027 must have an "ACTIVE" status for a variable period depending
on the temperature of the engine coolant. Both the relay and the heater plug are then supplied .
When the vehicle is started from cold, the injection computer still runs the pre-postheating unit to allow the vehicle
to start more easily, the state should be at "ACTIVE" during the starting phase.
After starting the state should remain "ACTIVE" for a variable period depending on the engine coolant temperature.
This is called postheating.
In the event that the vehicle does not start and the state ET007 does go to "ACTIVE" when the ignition is switched
on or during the starting phase, a preheating connection or circuit component may be damaged.
Please check:
– the supply fuse F01 (70A) of the supply and power plate.
– the + 12 V feed of heater plugs after relay control and that the connections are working properly.
– the continuity and absence of interference suppresser between:
9-track black connector of the pre-postheating unit track 2 Heater plug n˚4
9-track black connector of the pre-postheating unit track 6 Heater plug n˚1
9-track black connector of the pre-postheating unit track 7 Heater plug n˚2
9-track black connector of the pre-postheating unit track 1 Heater plug n˚3
– The black 9-track connector is correctly connected and its state of the pre-postheating unit.
If the vehicle starts, and the postheating is terminated and the state ET007 remains at ACTIVE during the engine
operating phase, refer to the interpretation of faults section DF081 "Preheating relay control circuit" and DF061
"Heater plug circuit".

INACTIVE

If the vehicle does not start or the state remains "INACTIVE" and preheating has not been carried out during the
starting phase, check the following connections:
Brown connector B track H2 of the injection computer Track 9 preheating unit
Injection computer of brown connector B track G1 Track 8 preheating unit
Repair if necessary.

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-129
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

LOW SPEED FAN ASSEMBLY RELAY CONTROL

ET037

If the vehicle is equipped with air-conditioning, the fan speed electrical system
comprises of 2 relays. Fan speed 1 relay will be run when the temperature of the
engine coolant exceeds 99°° and will be dedicated to cooling the engine as long as the
NOTES
engine coolant temperature does not exceed 102°°. If the temperature of the engine
coolant exceeds 102°°, the 2 speed fan assembly relays will be run and the engine
cooling fan will run more quickly.

IMPORTANT
The engine cooling fan will run at the 1st speed as soon as the computer runs the air conditioning compressor
where the vehicle is equipped with air conditioning.

"ACTIVE"

When the coolant reaches 99°°, the injection computer runs the low-speed fan relay, the state ET037 then changes
to status "ACTIVE". The relay then supplies the fan assembly and the cooling fan switches on.
If state ET037 is "ACTIVE", but the cooling fan is not running, perform the following operations:
– Check the integrity of fuse F2 (30A) in the engine fuse box and relay box.
– Next, check the continuity and absence of interference suppresser between:
Low speed fan relay mounting track 5 track 1 of fan resistance connector.
Track 5 of the low-speed fan relay mounting track 2 of the engine cooling fan connector.
– Disconnect the low- and high-speed relays, check their operation and the state of the connections.
– Repair if necessary.
– Check for the presence of + 12 V on terminal 5 of the low-speed relay mounting while this is running.

– Disconnect the black 2-track connector of the engine cooling fan and check the state of the connections.
– Repair if necessary.
– Next, check the continuity and absence of interference suppresser between:
Injection computer black connector B track A4 track 2 of the fan relay mounting.
Track 5 of the fan relay mounting track 2 of the black 2-track
connector of the engine cooling
fan.
Track 1 of the black 2-track connector of the engine cooling fan vehicle earth

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-130
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

ET037
CONTINUED

"INACTIVE"

If the engine temperature is lower than 99°°, the engine cooling fan should not switch on and the low-speed fan
relay of the engine cooling fan should not be run.
The state ET037 must therefore have an "INACTIVE" status when the relay command and the engine cooling fan
are not supplied.

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-131
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

HIGH SPEED FAN ASSEMBLY RELAY CONTROL

ET038

If the vehicle is not fitted with air conditioning, low-speed fan relay does not exist. The
NOTES circuit therefor only contains a single command relay to supply the engine cooling fan.
The engine cooling fan will thus have only one operating speed.

Vehicle without air conditioning

"ACTIVE"

When the coolant reaches 102°°, the injection computer runs the low-speed fan relay, the state ET038 then changes
to "ACTIVE" status. The relay then supplies the cooling fan.
If state ET038 is "ACTIVE", but the cooling fan is not running, perform the following operations:
– Disconnect the fan assembly relays, check the operation of the fan and the state of the connections.
– Repair if necessary.
– Check for the presence of + 12 V on terminal 5 of the relay mounting while this is running.
– Next, check the continuity and absence of interference suppresser between:
Injection computer black connector B track A4 track 2 of the fan relay mounting.
Track 5 of the relay mounting track 2 of the black 2-track connector of the engine cooling fan.
Track 1 of the black 2-track connector of the engine cooling fan Vehicle earth

"INACTIVE"

When the injection computer no longer requests cooling, the state ET038 changes to "INACTIVE". The fan should
then switch off.

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-132
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

ET038
CONTINUED

Vehicle without air conditioning

"ACTIVE"

When the coolant reaches a temperature of 102°°, the injection computer runs the high-speed fan relay, the state
ET038 then changes to "ACTIVE" status. The relay then supplies the engine cooling fan, which switches on.
If state ET038 is "ACTIVE", but the cooling fan is not running, perform the following operations:
– Check the integrity of fuse F2 (30A) in the engine fuse box and relay box.
– Ensure the presence of + 12 V after ignition feed on terminal 1 of the high-speed fan assembly relay mounting.
– Next, check for continuity and absence of interference suppresser between:
Computer supply voltage relay mounting track 5 Track 1 of the high-speed fan assembly relay
mounting.
– Disconnect the and high-speed relay, check its operation and the state of the connections.
– Repair if necessary.
– Next, check the continuity and absence of interference suppresser between:
Injection computer black connector A track G2 track 2 of the high-speed fan relay mounting.
Track 5 of the relay mounting track 2 of the black 2-track connector of the engine cooling fan.
Track 1 of the black 2-track connector of the engine cooling fan vehicle earth

INACTIVE

When the injection computer no longer requests cooling, the state ET038 changes to "INACTIVE". The engine
cooling fan should then switch off.

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-133
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

CRUISE CONTROL DISCONNECTION

ET086

State ET086 "Deactivate cruise control" is directly linked to state ET150 "Cruise
control/Speed limiter".
NOTES
Cruise control remains deactivated as long as the vehicle does not exceed a speed
V > 18 mph (30 km/h).

NONE The vehicle diagnosed is not equipped with cruise control.

STATUS 1 VEHICLE SPEED NOT REFRESHED

If the ABS computer no longer sends a signal to the injection computer, the vehicle
speed will be unknown. The cruise control will therefore be inactive, and state ET086
will remain in status 1.

STATUS 2 VEHICLE SPEED INVALID

So long as the vehicle has not exceeded a speed greater than or equal to 30 kph,
state ET086 remains in status 2.

STATUS 3 CRUISE CONTROL OR SPEED LIMITER FAULT

As soon as the cruise control or speed limiter experiences an electrical fault, the
injection computer changes state ET032: "Disabling of cruise control" to
STATUS 3.

STATUS 4 INCONSISTENCY BETWEEN REQUEST AND VEHICLE SPEED

As soon as an inconsistency is detected between the desired gear requested by the

driver and the actual speed of the vehicle, the injection computer changes state
ET086 to status 4.

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-134
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

ET086
CONTINUED

STATUS 5 FAULT DETECTED BY THE INJECTION COMPUTER

As soon as a fault is detected by the injection computer, state ET086 switches to

STATUS 5.

STATUS 6 GEAR LEVER IN NEUTRAL POSITION

As soon as the gear lever neutral position signal is detected by the injection
computer, it changes state ET086 to status 6.

STATUS 7 DISCONNECTION OF THE ENGINE/GEARBOX

As soon as the driver presses the clutch pedal, the injection computer changes state
ET086 to status 7.

STATUS 8 ANTI-SKID REQUEST

As soon as the anti-skid request signal is issued by the ABS or ESP computer, state
ET086 goes to status 8.

STATUS 9 BRAKE PEDAL PRESSED

As soon as the driver presses the brake pedal, the braking request is made and is
sent via the ABS computer. This signal deactivates the cruise control, and state
ET086 goes to status 9.

STATUS 10 PRESS THE SUSPEND BUTTON

As soon as the driver presses the cruise control stoppage switch, the injection
computer changes state ET086 to status 10.

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-135
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

AIR CONDITIONING REQUEST

ET102

"YES"

The state ET102 is used to interpret a request for air conditioning. When the air conditioning button is pressed, the
state ET102 should change to "YES".
If this does not happen, perform the following operations:
Check for continuity and absence of interference suppresser between:

Injection computer connector A, grey, track D3 Blue connector, air conditioning control panel,
track 5
If the problem persists, refer to the note regarding air conditioning.

"NO"

The state ET102 must have the "NO" status when the air conditioning control button has not been pressed.
If this state remains at NO despite the button being pressed, perform the following operations:

Check the continuity and absence of interference suppresser between:

Injection computer connector A, grey, track D3 Blue connector, air conditioning control panel,
track 5
If the problem persists, refer to the note regarding air conditioning.

"WITHOUT"

If the vehicle is not fitted with air conditioning the state ET102 will always have the "WITHOUT" status.

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-136
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

PUMP RELAY CONTROL LOW PRESSURE

ET105

"ACTIVE"

The state ET105 must take on the "ACTIVE" status when the injection computer runs the fuel pump relay. When
the ignition is switched on the state ET105 must be "ACTIVE".

"INACTIVE"

The state ET105 must take on the "INACTIVE" status when the injection computer runs the fuel pump relay.
If, when the ignition is switched on ET105 remains on INACTIVE, check for the continuity and absence of
interference suppresser between:

Injection computer black connector C track C1 Fuel pump relay mounting track B2
If the fault persists, consult fault interpretation DF082 "Low pressure pump relay circuit".

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-137
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

AIR CONDITIONING AUTHORISED

ET117

IMPORTANT
The computer does not authorise air conditioning if the driver requests full engine load. When air
conditioning is on, it uses up engine power.

"YES"

Air conditioning authorisation only changes to state "YES" if the injection computer is running the air conditioning
compressor clutch relay. This authorisation comes after state ET102 "Air conditioning request" is confirmed and
has the "YES" status.
If the state ET117 does not change to "YES" status despite the request for air conditioning having been made, refer
to the diagnostic note specific to air conditioning.

"NO"

The state ET117 must be at NO when the air conditioning is not activated or when the computer records a request
for full load.

"WITHOUT"

This status applies to all vehicles not fitted with air conditioning.

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-138
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

REDUNDANT BRAKE PEDAL

ET120

PRESENT

When the driver presses the brake pedal, state ET154 "Brake pedal" should go to PRESSED, and state ET120
Redundant brake pedal should go to "present" status.

If the driver presses down firmly on the brake pedal and status ET120 remains in the "ABSENT" state, check
lighting of the brake lights at the rear of the vehicle.
Check the state of contacts and connections of the brake light switch.
If the brake lights are working, check for insulation, continuity and absence of interference suppresser between:
Track B3 connector A, injection computer Track A4 black connector of the brake light switch
Repair if necessary.
If the brake lights are not working:
– Check the state of bulbs, replace if necessary.
– Check the state of fuse F34 (20A) of the fuse box and passenger compartment relay.
– Check for the presence of + 12 V after ignition on track 1 of the switch
– Then remove the brake light switch and carry out the checks in the following table:

Continuity between Insulation between

tracks: tracks

Switch pressed
A1 and B3 B1 and A3
(brake pedal released)

Switch released
B1 and A3 A1 and B3
(brake pedal pressed)

If these checks find faults, replace the brake light switch.

"ABSENT"

When the driver presses the brake pedal, state ET154: "Brake pedal" and state ET120: "Redundant brake
pedal" should go to "RELEASED".
If this does not happen, check the state and operation of the brake light switch by carrying out the checks
associated with status "PRESSED".

Comment: States ET154 "Brake pedal" and ET120 "Redundant brake pedal" are directly linked.
If one of them is in active status, the other absolutely must be of the same status. If this is not the case, carry out
the above fault finding procedure.

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-139
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

CODE PROGRAMMED
ET133

"YES"

The code changes to the "YES" state if dialogue between the UCH and the injection computer is possible and the
key code is recognised.
Engine starting authorisation is only given if the code is correctly recognised by the UCH computer and status
ET003: "Engine immobiliser" goes to INACTIVE.

"NO"

The code remains NO if dialogue between the UCH computer and the injection computer cannot be established
and status ET003 "Engine immobiliser" remains ACTIVE.
This problem may occur as a result of faulty or inexistent key programming. In this case, refer to the diagnostic
note of the UCH and follow the key programming procedure.
If this problem is not due to key programming, carry out a multiplex network test and check that dialogue between
the UCH and the injection computer is possible.
If dialogue is not established, contact the techline.

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-140
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

CLUTCH PEDAL
ET142

"PRESSED"

When the driver presses on the clutch pedal state ET042 "Clutch pedal" switches to "PRESSED" status.

"RELEASED"

When the driver releases the clutch pedal state ET142 "Clutch pedal" switches to "RELEASED" status
If the status "RELEASED" appears despite the clutch pedal being pressed, carry out the following operations:
– Disconnect the clutch pedal switch, check the insulation between tracks A1 and B3 pedal released position.
– Repeat this operation with the pedal pressed and check continuity between the 2 tracks
If these 2 checks are faulty, replace the switch.
Next, check for continuity and absence of interference suppresser between:
Track A1 clutch pedal switch connector track E2 of grey connector A of the injection computer
Track B3 of the clutch pedal switch vehicle earth
– Also check:
The state of contacts of blue pedals/dashboard connectors in track A1 and B3.
The state of contacts of black pedals/dashboard connectors in track 4

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-141
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

BRAKE PEDAL
ET154

"PRESSED"

When the driver presses the "brake pedal", state ET154 and state ET120 "secondary brake contact" should
switch to "ACTIVE".

If the driver presses down firmly on the brake pedal and state ET154 remains at state "RELEASED", check the
brake light ignition to the rear of the vehicle.
Check the state contacts and connections of the brake light switch.
If the brake light are working, check for continuity and absence of interference suppresser between:
Grey A connector Track B4, injection computer track A3 of the black brake light switch
connector
Repair if necessary.
If the brake lights are not working:
Check the state of bulbs, replace if necessary.
Check the state of fuse F34 (20A) of the fuse box and passenger compartment relay.
With the ignition on, check for the presence of + 12 V on track 1 of the switch.
Then remove the brake light switch and carry out the following table checks:

Continuity between Insulation between

tracks tracks

Switch pressed
3 and 4 1 and 2
(brake pedal released)

Switch released
1 and 2 3 and 4
(brake pedal pressed)

If these checks are faulty, replace the brake light switch.

"RELEASED"

When the driver presses the brake pedal, state ET154 and state ET120 "secondary brake contact" should switch
to "RELEASED".
If this does not happen, check the state and operation of the brake light switch by carrying out the checks
associated with status "PRESSED".

AFTER REPAIR Perform a road test and then a test with the fault finding tool.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-142
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of statuses

SYNCHRONISATION
ET157

Synchronisation is carried out during the engine starting phase. It is established between the camshaft position
sensor and the TDC sensor. Once this synchronisation has been carried out, it enables the computer to identify
cylinder n˚1 and to ascertain the precise position of the cylinder's top dead centre.
Synchronisation also allows the computer to determine the injection strategy.

"STANDBY"

The state ET157 is at "STANDBY" when the engine is stopped under + APC.

"UNDERWAY"

The state ET157 is at "CURRENT" when the engine is at the starting phase. When the computer is synchronising,
it receives and interprets signal from the camshaft and crankshaft position sensors.
If, after an attempt to start, the state ET157 remains "CURRENT", consult fault interpretation DF070 "camshaft /
engine speed consistency"

"PERFORMED"

The state ET157 is at "done" when the engine is started. The computer has identified the cylinder n˚1 and has
identified the exact top dead centre position. Injection phasing and engine management are now possible, and the
engine should be working properly.

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

13B-143
 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Summary table of parameters

Tool parameter Fault finding tool title

PR001 Fuel temperature
PR002 Coolant temperature
PR003 Air temperature
PR004 Computer supply voltage
PR005 Pedal load
PR006 Engine speed
PR008 Pedal potentiometer voltage track 1
PR009 Pedal potentiometer voltage track 2
PR016 Atmospheric pressure
PR018 Vehicle speed
PR033 Fuel flow
PR035 Idling speed correction
PR043 Relation vehicle speed/engine speed
PR047 Cruise control switch voltage
PR050 Air flow measurement
PR062 Engine idling speed value
PR075 Fuel flow value at idle speed
PR076 Idling speed setpoint 2
PR081 Turbocharging pressure loop difference
PR082 Turbocharging pressure
PR083 Injector rail pressure
PR086 Rail pressure loop difference
PR087 Air flow loop difference
PR088 EGR valve position feedback
PR089 EGR valve position feedback loop variance
PR090 Sensor supply voltage n˚1
PR091 Sensor supply voltage n˚2
PR092 Pedal load (track 1)
PR093 Pedal load (track 2)
PR094 Turbocharging limitation valve OCR
PR095 EGR valve OCR
PR097 Rail pressure regulation valve OCR

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Fault finding - Summary table of parameters

Tool Status Fault finding tool title

PR027 Low pressure pump relay control
PR028 Swirl Control
PR131 Preheating relay control
PR132 Air conditioning inhibition control
PR134 Low speed fan assembly relay control
PR135 High-speed fan assembly relay control
PR137 Water temperature warning light control
PR138 heating element relay control n˚1
PR139 heating element control relay n˚2
PR140 heating element control relay n˚3
PR170 Air temperature
PR174 Coolant temperature
PR177 Damper valve control
PR192 Refrigerant pressure
PR193 Injection fault warning light control
PR194 Serious injection fault warning light control
PR202 Regulated fuel flow
PR588 Radiator relay control
PR603 Specific idling speed commercial vehicle

Carry out another fault finding check on the system.

AFTER REPAIR Deal with any other possible faults.
Clear the stored faults.

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Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of parameters

AIR FLOW MEASUREMENT

PR050

There must be no faults present.

Perform this fault finding procedure:
NOTES
– following detection of an inconsistency in the "parameters" menu,
– or after a customer complaint (lack of power, smoke etc.).

Test the air intake circuit (from the air filter inlet to the inlet manifold tracts):
– Air filter unit inlet not blocked and filter not clogged,
– No foreign bodies on the air flowmeter grille (visual check only),
– Otherwise, replace the flowmeter.
– Oil vapour recirculation circuit connection conformity.
– Low and high pressure air circuit sealing and not obstructed: pipes, mounting clamps present and
tightened, turbocharging pressure sensor fitted, exchanger etc.
– Check that the damper valve is open (valve control rests on the body of the air vent unit)
– Check that the swirl flap is in the rest position (AC594, "Swirl flap", step 2),
Carry out the necessary repairs.
Check the electrical conformity of the air flow sensor power supply:

power circuit: + 12 V Track 4 and battery earth Track 6

sensor circuit: + 5 V Track 3 and computer earth Track 2

Check the continuity, insulation and absence of interference resistance on the link between:
Engine management computer, connector B track A3 track 5 air flowmeter connector
With the flowmeter connected, the vehicle ignition on and engine stopped:
– Check the voltage across tracks 2 and 5 of the flowmeter.
– If the value is not approximately 0.6 V ± 0.1, replace the flowmeter.
Check that the exhaust gas recirculation valve is not jammed open:
– Switch off the ignition, disconnect the connector and remove the exhaust gas recirculation valve:
– If removal reveals that the valve is jammed in the open position, replace the exhaust gas recirculation valve.
– Otherwise, with the valve removed and connected, establish communication with the tool and run the valve
via the command AC007 "EGR valve".
Check: valve travel (stroke of 0 to 2.5 mm for an Opening Cycle Ratio of 25 % and 6 to 7 mm for an Opening
Cycle Ratio of 75 %)
Closing when the command is completed.
If this check reveals that it is irreparably jammed or seized, replace the exhaust gas recirculation valve.

AFTER REPAIR Repeat the conformity check from the start.

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Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of parameters

TURBOCHARGING PRESSURE
PR082

Perform this fault finding procedure:

– following detection of an inconsistency in the "parameter" menu; or
NOTES
– after fault DF074: "turbocharging pressure sensor", or
– After a customer complaint (lack of performance, smoke etc.).

With the vehicle ignition on, engine stopped:

– Remove the turbocharger pressure sensor.
– Connect the sensor to the wiring, take a reading of the value of PR082 in the "parameter menu:
– If the value is not very close to PR016: "Atmospheric pressure":
(maximum pressure difference between PR016 and PR082, engine stopped = ± 20 hPa).
Check the insulation and absence of interference suppresser on the signal line and the turbocharging
pressure sensor power supply lines.
If the lines are okay, replace the turbocharging pressure sensor.
– Connect a vacuum pump to the turbocharging pressure sensor,
– Apply a pressure of between 0.1 and 1.3 bar (maximum pressure to be applied: 1300 hPa or 1.3 bar)
– Compare the pressure value displayed on the " parameter with the reading from the vacuum pump."
screen, with the reading from the vacuum pump.
If the difference* = ± 100 hPa (or ± 0.1 bar), replace the turbocharging pressure sensor.
If there is no discrepancy, the turbocharging pressure sensor is correct.
– Refit the sensor and its sealing ring, then interpret the command AC004 "turbocharging limitation valve".
*Note:
The fault finding tool displays the absolute pressure, the pressure gauge on your vacuum pump displays the
relative pressure: the normal discrepancy between the two is equal to atmospheric pressure, i.e. ~ 1000 hPa.

AFTER REPAIR Repeat the conformity check from the start.

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Fault finding - Interpretation of parameters

RAIL PRESSURE
PR083

There must be no present or stored faults.

Perform this fault finding procedure:
NOTES – following detection of an inconsistency in the "parameter" menu, or
– following the interpretation of command AC006: "Fuel pressure solenoid valve"
– after a customer complaint (starting problems, poor performance, stalling etc.).

ELECTRICAL CONFORMITY OF THE SENSOR:

Check for continuity and absence of interference suppresser on the following connections:
Engine management computer, connector B track C3 track 2 rail pressure sensor
connector
Engine management computer, connector B track C2 track 3 rail pressure sensor
connector
Engine management computer, connector B track C4 track 1 rail pressure sensor
connector
If all these connections are correct, check for the presence of a fuel pressure sensor power supply:
+5V track 3 of the rail pressure sensor connector
Earth track 1 of the rail pressure sensor connector

Check the seal of the low and high pressure diesel circuits (visual checks, odour, etc.): pump housing,
overpressure valve, pipes, rail and injector unions, injector wells, etc.).

if all the above checks are correct:

With the ignition on and the engine stopped for over 1 minute:
– Display PR083: if the value is lower than 50 bar, the sensor is correct.
– If not, replace the rail pressure sensor.

AFTER REPAIR Repeat the conformity check from the start.

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Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of parameters

REFRIGERANT PRESSURE
PR192

No faults should be present or stored.

Perform this fault finding procedure:
NOTES
– following detection of an inconsistency in the "parameter" menu, or
– following a customer complaint (no air conditioning, etc.).

Step 1
– Start the engine, switch on the air conditioning and increase the engine speed to 1500 rpm:
– Display PR192, from the "parameters" menu or "engine cooling fan" function of the fault finding tool:
If the pressure is greater than ~ 27 bar, go to Step 2.
If the pressure does not rise, or remains below normal:
– Check the operation of the compressor and its relay, by running the relay via command AC599 "air
conditioning compressor",
In the event of a problem, apply the relevant fault finding procedure.
– Check the conformity of the refrigerant fluid pressure sensor signal by comparing* the value displayed by
the tool (PR192) with a filling station high pressure gauge reading.
If there is a discrepancy = ± 1.5 hPa (or 1500 hPa):
Check the insulation, continuity and for absence of interference suppresser in the connections between:
Engine management computer, connector B track E4 track A of the refrigerant fluid
pressure sensor
Engine management computer, connector B track E2 track B of the refrigerant fluid
pressure sensor
Engine management computer, connector B track E3 track C of the refrigerant fluid
pressure sensor
It the power supply and connections are okay, replace the refrigerant fluid pressure sensor (see section 6 of
the Workshop Repair Manual).
If there is no discrepancy, the refrigerant pressure sensor is correct: go to step 2.

Step 2
– Perform fault finding on the air conditioning system (see section 6 of the Workshop Repair Manual).
*Note:
The diagnostic tool displays the absolute pressure; if the high pressure gauge of your filling station displays
the relative pressure, the normal difference between the two readings is equal to the atmospheric pressure,
i.e. ~ 1000 hPa.

AFTER REPAIR Repeat the conformity check from the start.

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Program No.: CB
Vdiag No: 19
Fault finding - Summary table of controls

Summary of available controls

Controls are carried out to check that certain components are working properly or to
NOTES
carry out part replacement.

Tool command Fault finding tool title

SC004 Enter injector calibration data

SC005 Data save for replacing computer
SC007 Writing after replacement

RZ001 Clear fault memory

RZ007 EGR valve programming

AC002 heating element relay n˚3

AC004 Wastegate
AC006 Fuel pressure solenoid valve
AC007 EGR valve
AC010 Preheating relay
AC011 Low-speed fan relay
AC012 High speed fan assembly
AC212 Preheating warning light
AC213 Overheating warning light
AC301 Heating element relay n˚1
AC302 Heating element relay n˚2
AC595 Injection fault warning light (fault level 1)
AC596 Severe injection fault warning light (fault level 2)
AC593 Damper valve
AC594 Swirl valve
AC599 Air conditioning compressor

VP001 Entering the VIN

VP028 Increase in fast idle speed, commercial vehicle
VP029 Decrease in fast idle speed, commercial vehicle

AFTER REPAIR Repeat the conformity check from the start.

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Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

INJECTOR CALIBRATION DATA ENTRY

SC004

This command is performed after replacing injectors and only if the vehicle is
configured with IMA/LC041: IMA programming on "With".
NOTES
If this command is not executed by a technician, fault DF173: "Injector code
programming" will be present.

To carry out this command, select "specific configurations" mode in the clip tool and choose command
SC004.
Procedure to be followed:
– Read the 6-character alphanumeric codes etched on the upper part of the injector bodies.
– Enter each injector code on the associated cylinder.
– Confirm the change of injector code configuration
– When the command is completed, the modified codes appear in the "current" column.
– Check that the codes correspond to those read earlier.
– If the codes entered appear in neither the "current" column nor the "desired" column, check the codes read
and make sure the data has been entered correctly.
– Exit fault finding mode.
– Switch off the ignition and wait for the end of power latch.
– Switch the ignition back on and check for faults.
– DF173 must be "stored".
If DF173 is still present, the command has not been performed correctly.
Start the procedure again and follow the instructions.
If this is still not effective, follow the procedure below:
A failure can cause DF173 to reappear, with incorrect command confirmation SC004.
If power latch is not performed after switching the ignition off, the injection computer will not store the new
injector codes.
This an occur if the electrical wiring has been altered: fitting of an alarm or accessories on the vehicle.
Check the condition of the wiring harness, therefore, and examine whether any branch-connections have been
made on the following connection:'
– Impact sensor track 3 Track 1 of the main power supply relay of the injection computer.
Repair if necessary.
Then check whether the power latch* has been performed correctly:
Switch off the ignition and check that the immobiliser warning light flashes for 2 seconds after switching the
ignition off.
If the warning light flashes as soon as the ignition is switched off, the power latch* has not been performed and
the command will be ignored.
If all these checks still do not enable the command to be confirmed, contact the techline.

* the immobiliser warning light will flash for a few seconds after switching off the ignition.

AFTER REPAIR Repeat the conformity check from the start.

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Fault finding - Interpretation of commands

DATA SAVE FOR REPLACING COMPUTER

SC005

NOTES This save is carried out before computer reprogramming or replacement.

To carry out this command, select mode "specific configurations" in the clip tool and choose command
SC005.
Validation of this command leads to the following vehicle-specific data being saved:
– Vehicle-specific idle speed
– Options available on the vehicle and managed by the computer (e.g. air conditioning).
– Fast idling speed if Commercial Vehicle.
This information will be saved on the CLIP tool.
Once the save is terminated, use command SC007 "Writing data after replacing computer" to reset the
computer.

AFTER REPAIR Repeat the conformity check from the start.

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Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

WRITING AFTER REPLACEMENT

SC007

The data must be saved using command SC005 "Saving data for computer
NOTES replacement" to carry out this command"
The writing is carried out after the computer has been reprogrammed or replaced

To carry out this command, select "specific configurations" mode in the clip tool and choose command
SC007.
Validation of this command leads to writing of saved data via the command SC005 "Saving data for
computer replacement".

The data is as follows:

– Vehicle-specific idle speed
– Options available on the vehicle and generated by the computer (e.g. Air conditioning)
– Fast idle speed if commercial vehicle.
They will configure the computer and will enable it to avoid:
– engine malfunction after reprogramming or replacing the computer.
– incorrect interpretation of signals provided by the Clip tool.

AFTER REPAIR Repeat the conformity check from the start.

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Fault finding - Interpretation of commands

EGR VALVE PROGRAMMING

RZ007

This command only executes after the exhaust gas recirculation valve has been
replaced.
NOTES
Treat all faults which do not involve the exhaust gas recirculation valve before
programming the valve.

After replacing the exhaust gas recirculation valve, the offsets in memory have to be deleted so that the
programming uses the new valve's offset value.
Procedure to be followed after replacing the exhaust gas recirculation valve:
– Switch on the ignition
– Connect the fault finding tool and choose the tab delete RZ007.
– Activate command RZ007.
– Once the command has terminated, check that the following parameters and states correctly indicate the
statuses below:
– ET225 "Programming first EGR valve offset": not done
– PR583 "Offset new EGR valve" = 0.00 V
– PR584 "Offset new EGR valve" = 0.00 V
– PR088 Copy EGR valve position = 0.75 V < X < 1.6 V
– Exit fault finding mode and switch off the ignition.
– Then wait for the immobiliser warning light on the instrument panel to flash.
– The contact must be replaced to initialise the new exhaust gas recirculation valve
– When initialisation is complete, the EGR valve programming function displays:
– ET225: Done
– 0.75V < PR583 = PR584 = PR088 < 1.6 V

AFTER REPAIR Repeat the conformity check from the start.

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Fault finding - Interpretation of commands

heating element RELAY no. 3

AC002 (check that the computer is correctly configured)

No fault should be present or stored:

Perform this fault finding procedure if there is a fault in the commands menu, or a
NOTES passenger compartment heating/demisting problem.
Refer to the "Wiring diagrams" Technical Note for your vehicle to locate the relevant
fuses and relays.

If the "additional heater relay 3" does not operate when running command AC002.
Check the connectors of "additional heater 3 relay" mounting.
Check the connectors on the engine management computer.
Repair if necessary.

If the fault persists, check as follows that this relay is controlled by the engine management computer:
– Disconnect additional heater relay 3, place a resistor of 50 to 100 Ω on its mounting in place of the coil and
connect a voltmeter as follows:
positive terminal on + 12 V battery
negative terminal on track 2 of the additional heater 3 relay mounting.
– Clear the fault and run command AC002
– If the voltmeter shows the battery voltage (two 2 second ON-OFF cycles), replace the additional heater
relay 3.
– If the voltmeter does not show the battery voltage (two 2 second ON-OFF cycles), contact the Techline.

If the "additional heater relay 3" operates with the control AC002, but there is still a problem with the
passenger compartment heating - de-misting, check using a wiring diagram:
– The conformity of the heating element Maxi-fuse.
– The presence of + 12 volts of the battery on track 3 of the additional heater relay 3 mounting.
– The conformity of the additional heater relay 3.
– The continuity between track 5 of the additional heater relay 3 mounting and the supply terminal for heating
element 4.
– The conformity of the heating element resistance: 0.45 Ω ± 0.05 at 20 °C.
– The presence of earth at the plenum chamber (heating element mounting).
– Also check the level of the cooling circuit and that there are no leaks.
Carry out the necessary repairs.

AFTER REPAIR Repeat the conformity check from the start.

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 EDC15C13 DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands 13B
TURBOCHARGING LIMITATION VALVE
AC004

Perform this fault finding procedure:

– following interpretation of an unresolved fault or,
NOTES
– after dealing with the interpretation of PR082 and/or after a customer complaint (lack
of power, smoke etc.).

The following procedure is for checking that the turbocharger and its control circuit are working properly.
Initial

Check the sealing of the high pressure air circuit:

Pipe not joined or pierced, pressure sensor disconnected or poorly fitted (seal present), exchanger pierced. To test
the exchanger: stabilise the engine speed between 3500 and 4000 rpm with the vehicle stopped and check that
there are no leaks.

Check the resistance of the wastegate (turbocharger pressure limitation valve) between its tracks 1 and 2.
Replace the valve if the resistance is not:
15.4 Ω ± 0.7 at + 20°°C for a PIERBURG solenoid valve
16.5 Ω ± 1.6 at + 25°°C for a BITRON solenoid valve
– Check the continuity and absence of interference suppresser on the connections between:
– Engine management computer, connector B track L2 track 1 of the turbocharging pressure
regulator
– + 12 V after relay track 2 of the turbocharging pressure
regulator

Turbocharger control circuit check

On engine F9Q, steps 1, 2, and 3 can be replaced by a visual inspection:
– With the engine stopped, make sure the control rod is in the resting position,
– Start the engine and make sure that the control rod operates to the high stop.
(when the engine shuts off, the control rod must return to the resting position).
1) Vacuum pressure command check:
– Disconnect the solenoid valve intake hoses and connect it to a pressure gauge,
– Start the engine and stabilise it at idle,
– If the vacuum pressure does not reach 800 mbar ± 100: check the vacuum pressure circuit from the vacuum
pump.
– Stop the engine, reconnect the intake hoses and go to step n°°2.
2) Solenoid valve control check:
– Disconnect the solenoid valve outlet hoses,
a) with a PIERBURG solenoid valve, start the engine and stabilise it at idle,
– Place your hand on the solenoid valve and block the outlet connection with your thumb,
– If there is no noticeable vibration of the solenoid valve, go to step n°°5,
b) with a BITRON solenoid valve , put a cap on the outlet union,
– Connect a vacuum pump to the inlet union and apply vacuum pressure,
– If the vacuum pressure is held, replace the solenoid valve.
– If not, reconnect the inlet hoses, remove the cap and place the pressure gauge on the outlet connection,
– Start the engine:
– If there is no vacuum measured, go to step n°°5,

AFTER REPAIR Repeat the conformity check from the start.

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Fault finding - Interpretation of commands

AC004

CONTINUED

Turbocharger control circuit check (continued)

3) Solenoid valve functioning check:
– Attach the pressure gauge to the solenoid valve outlet connection,
– Start the engine and stabilise it at idle,
G9T and G9U engine: if the vacuum pressure does not reach 475 mbar ± 75, replace the solenoid
valve,
Engine F9Q: if the vacuum pressure does not reach 800 mbar ± 100, replace the solenoid valve,
4) Turbocharger functioning check:
a) Attach a vacuum pump to the hoses connected to the turbocharger control diaphragm,
– Apply a negative pressure of 800 ± 100 mbar:
If there is a leak, replace the turbocharger (diaphragm cannot be separated from the turbocharger).
b) Check the control rod displacement and setting (Workshop Repair Manual Section 12B).
If the control rod is seized, replace the turbocharger.
c) Engine cold and shut off:
– Remove the turbocharger air intake duct and make sure that the compressor is turning freely on its axle.
d) If the problem persists:
– Check that the exhaust manifold is not leaking,
– Check that the exhaust is not blocked.
Carry out the necessary repairs.

5) Computer output stage check (solenoid valve connected):

This operation can only be carried out if the checks indicated in step n°°2 are not conclusive.
Either by voltmeter:
– Connect the voltmeter earth to track 2 of the solenoid valve and the positive cable to track 1.
– Delete any fault on the solenoid valve then execute command AC004 "Turbocharging limitation valve":
The voltmeter should display ten cycles of two successive voltages approximately equal to the combined
voltage of the battery and the current Opening Cyclic Ratio, i.e.: ~ 2.5 V for an Opening Cyclic Ratio of 20 %
then ~ 8.7 V for an Opening Cyclic Ratio of 70 %.
Either by oscilloscope (calibrated at 5 V/div and time base of 1 ms/div):
– Connect the earth of the oscilloscope to the battery earth and the positive test pin to track 2 of the solenoid
valve.
– Delete any fault on the solenoid valve then execute command AC004 "Turbocharging limitation valve":
The oscilloscope should display a square wave signal with an amplitude of 12.5 V at a frequency of 140 Hz
( with an Opening Cyclic Ratio increasing successively from ~ 20 to ~ 70 %)
If the measurement is correct, replace the solenoid valve.
If the measurement does not show any control or continuous voltage, contact the Techline.

AFTER REPAIR Repeat the conformity check from the start.

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 EDC15C13 DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands 13B
FUEL PRESSURE SOLENOID VALVE
AC006

Perform this fault finding procedure:

– following interpretation of an unresolved fault
– following detection of a fault in the command menu,
NOTES
– following detection of an inconsistency in the "parameter" menu,
– following a customer complaint (starting problems, engine speed instability, injection
noise).

Step 1
Check the resistance of the pressure regulator between tracks 1 and 2.
– If its resistance is not: 3 Ω ± 0.5 at 20°°C, replace the regulator.
Check for continuity and make sure there is no extraneous resistance on the following connections:
Engine management computer, connector B track L1 track 2 of the pressure regulator
connector.
12 V after relay feed track 1 of the pressure regulator
connector.
If, when running control AC006, you can hear a slight whistling noise and the pressure regulator cracking, go
to Step 2. Otherwise, ensure that the computer output stage is functioning correctly:
By ammeter:
With the solenoid valve connected, connect the Amps clamp to the solenoid valve track 1 connection (in the
direction of the current): Clear any faults in the fuel pressure solenoid valve then run command AC006:
The ammeter should display ten cycles of two successive strengths: ~ 0.6 A then ~ 2 A
Or using a voltmeter:
With the solenoid valve connected, connect the voltmeter earth lead to track 2 of the fuel pressure solenoid
valve and the positive cable to track 1. Clear any faults in the fuel pressure solenoid valve then run command
AC006 "Fuel pressure solenoid valve"
the voltmeter should display two successive voltages approximately equal to the combined
voltage of the battery and the current Opening Cyclic Ratio, i.e. successively: ~ 3.15 V for an
Opening Cyclic Ratio of 25 % then ~ 9.45 V for an Opening Cyclic Ratio of 75 % (ten cycles)
Either by oscilloscope (calibrated at 5 V/div and time base of 1 ms/div):
With the solenoid valve connected, connect the earth on the oscilloscope to the battery earth and the positive
test pin on track 2 of the fuel pressure solenoid valve, clear any fuel pressure solenoid valve faults, then
perform command AC006: "Fuel pressure solenoid valve":
the oscilloscope should display a square wave signal with an amplitude of 12.5 V at a frequency
of 185 Hz (with an Opening Cyclic Ratio which increases from 25 to 75 % successively).
– If the measurement is in order, replace the regulator.
– If the measurement is not in order, contact the techline.

Step 2, next page

*Opening Cyclic Ratio

AFTER REPAIR Repeat the conformity check from the start.

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Fault finding - Interpretation of commands

AC006

CONTINUED

Step 2
In the event of rail overpressure:
Check the operation of the injectors: see the "Injector fault finding" help part of this note.
Check that the rail pressure sensor is operating correctly. Interpretation of parameter PR083 "rail pressure".
If these checks reveal no irregularities, replace the regulator.

In the event of rail underpressure:

Check that the rail pressure sensor is operating correctly. Interpretation of parameter PR083 "rail pressure".
Check the priming of the low pressure diesel circuit.
Check the conformity of the diesel filter connections.
Check the condition of the filter (clogging and water saturation),
Check that there are no air bubbles between the filter and the high pressure pump.
Check the low and high pressure diesel fuel circuit sealing (visual checks, odour, etc.): pump casing, pressure
relief valve, pipes, rail and injector unions, injector wells, etc.
Check the conformity of the seal fitting on the pressure regulator.
Check the operation of the injectors: see the "Injector fault finding" Customer complaints section of this
note.
Carry out the necessary repairs.

If the engine starts:

Clear any faults on the fuel pressure solenoid valve.
With the engine warm, leave it running at idle speed for a few minutes (3 to 5 minutes):
– If it stalls and the fault reappears, replace the regulator.
– If it does not stall, stabilise the engine speed at 2000 rpm (1 minute) then accelerate under full load until it
cuts out.
If the engine stalls, replace the high pressure pump.
If the engine does not start or there is no timing:
first replace the regulator and, if the fault persists, replace the high pressure pump.

AFTER REPAIR Repeat the conformity check from the start.

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Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

EGR VALVE
AC007

Perform this fault finding procedure:

NOTES – following the interpretation of unresolved fault DF077 (1.DEF or 2.DEF),
– after a customer complaint (lack of performance, smoke).

Step 1
– Measure the resistance of the exhaust gas recirculation (EGR) valve between tracks 1 and 5.
– If its resistance is not around 8 Ω ± 0.5 at + 20 °C, replace the exhaust gas recirculation valve
– Check for continuity and make sure there is no interference suppresser on the following connections:
– Engine management computer, connector B track M1 track 5 exhaust gas
recirculation valve connector
– + 12 V after relay track 1 of the exhaust gas
recirculation valve connector
If you notice no valve movement when running command AC007: "EGR valve", ensure that the computer
output stage is functioning:
– Either by oscilloscope (calibrated at 5 V/div and time base of 2 ms/div):
With the exhaust gas recirculation valve connected, connect the oscilloscope earth to battery earth with the
positive test pin on track 5 of the exhaust gas recirculation valve. Clear any exhaust gas recirculation fault,
then run command AC007 "EG valveR4"
The oscilloscope should display a square wave amplitude signal of 12.5 V at a frequency of 140 Hz, (with
an Opening Cyclic Ratio increasing from 25 to 75 %).
– Or using a voltmeter:
With the exhaust gas recirculation valve connected, connect the voltmeter earth cable to track 2 of the
exhaust gas recirculation valve and the positive lead to track 1. Clear any exhaust gas recirculation valve
faults, then run command AC007: "EGR valve"; the voltmeter should display two successive voltages
approximately equal to the battery voltage multiplied by the current Opening Cycle Ratio.
i.e.: successively: 3.15 V for an Opening Cyclic Ratio of 25 % then 9.45 V for an Opening Cyclic Ratio of
75 % (10 cycles)
– If the measurement is correct, go to Step 2.
– If the oscilloscope (or voltmeter) shows no control, or continuous voltage, contact the Techline.

Step 2, next page

AFTER REPAIR Repeat the conformity check from the start.

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Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

AC007

CONTINUED

Step 2
Check there are no leaks in the exhaust gas recirculation circuit.
Carry out the necessary repairs.
Check the exhaust gas recirculation valve operation:
Disconnect the connector and remove the exhaust gas recirculation valve,
– If removal reveals that the valve is blocked open, replace the exhaust gas recirculation valve.
– Otherwise, remove the valve and reconnect the connector.
Clear the fault and run command AC007: EGR valve:
Check:
– valve travel (0 to 2.5 mm for an Opening Cycle Ratio of 25 % and 6 to 7 mm for an Opening Cycle Ratio
of 75 %)
– The absence of play between the valve and its control rod, and its general condition (clogging, hard point,
etc.).
– Valve closing when the command is completed.
If, when running command AC007: "EGR valve", the exhaust gas recirculation valve does not move, or if
these checks indicate that it is irreparably blocked or stuck, replace the exhaust gas recirculation valve
(following procedure RZ007: "EGR valve programming", described in the "Command interpretation"
section).

AFTER REPAIR Repeat the conformity check from the start.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

PREHEATING RELAY
AC010

This command is only carried out if the fault DF061 Heater plug circuit, or DF081
"Preheating relay circuit" is present or stored and if no other fault is present.
NOTES
See the "Wiring diagrams" Technical Note for your vehicle to locate the relevant fuses
and relays.

Before performing the following diagnostic, check that the battery voltage is not below 12 V.
Step 1:
Using a multimeter fitted with an ampermetric clamp, bring the 4 preheating spark plug supply wires together.
Run the preheating relay via command AC010 and measure the intensity used by the 4 heater plugs.
If the current used is not between 60 and 80A, go to Step 2, otherwise end of diagnostic.

Step 2:
Check the connectors on the preheating unit, preheating spark plugs and injection computer. Repair if
necessary.
Next, check the resistance of the heater plugs. If this resistance is not 0.6 Ω ± 0.1, replace the faulty plug(s).
Check the continuity and absence of interference suppresser between:
– preheating unit track 1 cylinder 3 heater plug
– preheating unit track 2 cylinder 4 heater plug
– preheating unit track 6 cylinder 1 heater plug
– preheating unit track 7 cylinder 2 heater plug.
Check the state of fuse F01 (70A) which supplies the pre-postheating unit. Replace it if necessary. Then check
for the + 12 V feed on track 3 of the preheating relay connector.
Check the continuity and absence of interference suppresser between:
– Injection computer connector B track B3 Track 9 of the preheating unit connector
– Injection computer connector B track C3 Track 8 of the preheating unit connector
If the fault persists, replace the preheating unit.

AFTER REPAIR Repeat the conformity check from the start.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

LOW SPEED FAN ASSEMBLY RELAY

AC011

No fault should be present or stored:

Perform this fault finding procedure if a malfunction appears on the "command" menu
NOTES or after an engine cooling system or air conditioning problem.
Refer to the "Wiring diagrams" Technical Note for your vehicle to locate the relevant
fuses and relays.

If, when running command AC011, the low-speed fan assembly relaydoes not operate:
Check the low speed fan assembly relay mounting and the connections of the engine management computer.
Repair if necessary.

If the problem persists, check that the relay is actuated by the engine management computer as follows:
– Disconnect the "low speed fan assembly" relay, and mount a 50 to 100 Ω resistor on the relay mounting
in place of the coil, and connect a voltmeter as follows:
positive terminal to + 12 V battery
negative terminal on track 2 of the "low-speed fan assembly relay" mounting.
– Clear the fault and run command AC011
– If the voltmeter indicates the battery voltage (three 2 second ON-OFF cycles), replace the relay.
– If the voltmeter does not show the battery voltage (three 2 second ON-OFF cycles), contact the techline.

If therelay of the "low-speed fan assembly" is activated, but a problem of fan tripping remains, check, using
the wiring diagram:
– The conformity of the fan assembly maxi-fuse.
– The conformity of the low speed fan relay.
– The continuity of the connection between track 5 of the "low speed fan assembly" relay mounting and
track 1 of the low speed resistor.
– The conformity of the low speed resistance (resistance and connectors).
– The continuity of the connection between track 2 of the low speed resistor connector and track 1 of the fan
assembly connector.
– The conformity of the fan assembly and the continuity of track 2 to earth.
Carry out the necessary repairs.

AFTER REPAIR Repeat the conformity check from the start.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

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EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

HIGH-SPEED FAN ASSEMBLY RELAY

AC012

No fault should be present or stored:

Perform this fault finding procedure after a malfunction appears on the "command"
NOTES menu or following an engine cooling problem.
Refer to the "Wiring diagrams" Technical Note for your vehicle to locate the relevant
fuses and relays.

If, when running control AC012, "the high speed fan assembly relay" does not operate:
Perform a check on the "high speed fan assembly" relay mounting and the connections of the engine
management computer.
Repair if necessary.

If the problem persists, check that the relay is actuated by the engine management computer as follows:
– Disconnect the high speed fan assembly relay, place a resistance of 50 to 100 Ω on its mounting in place of
the coil and connect a voltmeter as follows:
positive terminal to + 12 V battery
negative terminal to track 2 of the "high-speed fan assembly" relay mounting.
– Clear the fault and run command AC012
– If the voltmeter indicates the battery voltage (three 2-second ON-OFF cycles), replace the relay.
– If the voltmeter does not show the battery voltage (three 2-second ON-OFF cycles), contact the techline.

If the low-speed fan assembly relay is supplied by command AC012, but there remains a problem of fan
tripping, check, using the wiring diagram
– The conformity of the fan assembly maxi-fuse.
– Presence of + battery feed on track 3 of the high speed fan assembly relay mounting.
– The conformity of the "high speed fan assembly relay".
– The continuity of the connection between track 5 of the "high speed fan assembly relay mounting" and
track 1 of the fan assembly connector.
– The conformity of the fan assembly.
– The continuity of the connection between track 2 of the fan assembly connector and earth.
Carry out the necessary repairs.

AFTER REPAIR Repeat the conformity check from the start.

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EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

PREHEATING WARNING LIGHT

AC212

Perform this fault finding procedure after noting a malfunction in the "command" menu
Special notes:
NOTES
This command lights up the preheating symbol and the electronic fault symbol at the
same time (shared light).

Check the instrument panel connectors.

Check the connectors on the engine management computer.
Repair if necessary.
Using the wiring diagram:
– Check the continuity and absence of interference suppresser on the connection between:
Engine management computer, connector C track B4 track 7 instrument panel 30-
track connector
– Check for the presence of + 12 Volts battery on track 4 of the instrument panel 30-track connector.
If the problem persists, check that the preheating warning light is controlled by the engine management
computer as follows:
Disconnect the 30-track connector from the instrument panel and connect a voltmeter as follows:
– positive terminal on + 12 V battery
– negative terminal on track 7 of the instrument panel 30-track connector.
– Run the warning light via command AC212.
● If the voltmeter shows the battery voltage (one 2 second ~ ON-OFF cycle), proceed to a control on the
instrument panel (warning light, internal hoses, etc.):
Perform any required repairs or replace the instrument panel if necessary.
● If the voltmeter does not show the battery voltage (three 2-second ~ ON-OFF cycles), contact the techline.

AFTER REPAIR Repeat the conformity check from the start.

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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

OVERHEATING WARNING LIGHT

AC213

Perform this fault finding procedure after noting a malfunction in the "command" menu
NOTES Special notes:
This warning light is shared with the level 2 fault warning light (severe injection fault).

Check the instrument panel connectors.

Check the connectors on the engine management computer.
Repair if necessary.
Using the wiring diagram:
– Check the continuity and absence of interference suppresser on the connection between:
Engine management computer, connector C track A4 track 17 instrument panel
30 track connector
– Check for the presence of + 12 Volts battery on track 4 of the instrument panel 30-track connector.
If the problem persists, check that the overheating warning light is controlled by the engine management
computer as follows:
Disconnect the 30-track connector from the instrument panel and connect a voltmeter as follows:
– positive terminal on + 12 V battery
– negative terminal on track 17 of the instrument panel 30-track connector.
Run the warning light via command AC213.
● If the voltmeter shows the battery voltage (one ~ 2-second ON-OFF cycle), check the instrument panel
(warning lights, internal connections, etc.). Perform any required repairs or replace the instrument panel if
necessary.
● If the voltmeter does not show the battery voltage (three 2-second ~ ON-OFF cycles), contact the techline.

AFTER REPAIR Repeat the conformity check from the start.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

heating element NO. 1 RELAY

AC301

(Check that the computer is correctly configured)

No fault should be present or stored:

NOTES Perform this fault finding procedure if there is a fault in the "command" menu, or a
passenger compartment heating/demisting problem.
Refer to the "Wiring diagrams" Technical Note for your vehicle to locate the relevant
fuses and relays.

If the "additional heater relay 1" does not operate when running command AC301:
Check the "additional heater relay 1mounting".
Check the connectors on the engine management computer.
Repair if necessary.

If the fault persists, check as follows that this relay is controlled by the engine management computer:
– Disconnect the additional heater relay 1, place a resistance of 50 to 100 Ω on the mounting in place of the
coil and connect a voltmeter as follows:
positive terminal to + 12 V battery
negative terminal on track 2 of the "additional heater 1 relay mounting".
– Delete the fault and run command AC301 EGR valve
– If the voltmeter shows the battery voltage (2 second ON-OFF cycles), replace the additional heater relay 1.
– If the voltmeter does not show the battery voltage (2 second ON-OFF cycles), contact the Techline.

If the additional heater relay 1 is supplied but there remains a problem with passenger compartment
heating/demisting, Check using the wiring diagram:
– The conformity of the heating element Maxi-fuse.
– The presence of + 12 volts of the battery on track 3 of the additional heater relay 1mounting;
– The conformity of the "additional heater relay 1".
– The continuity between track 5 of the "additional heater relay 1" relay mounting and the power supply
terminal for heating element 1.
– The conformity of the heating element resistance: 0.45 Ω ± 0.05 at 20 °C.
– The presence of earth at the plenum chamber (heating element mounting).
– Also check the level of the cooling circuit and that there are no leaks.
Carry out the necessary repairs.

AFTER REPAIR Repeat the conformity check from the start.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

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EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

heating element RELAY NO. 2

AC302

(Check that the computer is correctly configured)

No fault should be present or stored:

Perform this fault finding procedure if there is a fault in the "command" menu, or a
passenger compartment heating/demisting problem.
NOTES
Special notes:
The additional heater relay 2 supplies heating elements 2 and 3 in parallel.
Refer to the "Wiring diagrams" Technical Note for your vehicle to locate the relevant
fuses and relays.

If the "additional heater relay 2" does not operate when running command AC302:
Check the connectors of additional heater 2 relay mounting.
Check the connectors on the engine management computer.
Repair if necessary.

If the fault persists, check as follows that this relay is controlled by the engine management computer:
– Disconnect additional heater relay 2, place a resistor of 50 to 100 Ω on its mounting in place of the coil and
connect a voltmeter as follows:
positive terminal on + 12 V battery
negative terminal on track 2 of the additional heater 2relay mounting.
– Clear the fault and run command AC302
– If the voltmeter shows the battery voltage (two 2 second ON-OFF cycles), replace the additional heater
relay 2
– If the voltmeter does not show the battery voltage (two 2 second ON-OFF cycles), contact the Techline.

If the additional heater relay 2 operates via command AC302, but there remains a problem with the heating
- demisting in the passenger compartment. Check using the wiring diagram:
– The conformity of the heating element Maxi-fuse.
– The presence of + 12 volts of the battery on track 3 of the additional heater relay 2 mounting.
– The conformity of the additional heater relay 2.
– The continuity between track 5 of the mounting for additional heater relay 2 and the supply terminals for
heating elements 2 and 3.
– The conformity of the heating element resistors: 0.45 Ω ± 0.05 to 20°C.
– The presence of earth at the plenum chamber (heating element mounting).
– Also check the level of the cooling circuit and that there are no leaks.
Carry out the necessary repairs.

AFTER REPAIR Repeat the conformity check from the start.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

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Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

INJECTION FAULT WARNING LIGHT (gravity level 1)

AC595

Perform this fault finding procedure after noting a malfunction in the "command"
menu.
NOTES
Special notes:
This warning light is shared with the preheating indicator light.

Check the instrument panel connectors.

Check the connectors on the engine management computer.
Repair if necessary.
Using the wiring diagram:
– Check the continuity and absence of interference suppresser on the connection between:
Engine management computer, connector C track B4 track 7 instrument panel
30-track connector
– Check for the presence of + 12 Volts battery on track 4 of the instrument panel 30-track connector.

If the problem persists, check that the relay is actuated by the engine management computer as follows:
Disconnect the 30-track connector from the instrument panel and connect a voltmeter as follows:
– positive terminal on + 12 V battery
– negative terminal on track 7 of the instrument panel 30-track connector.
Run the warning light via command AC595.
● If the voltmeter shows the battery voltage (one ~ 2-second ON-OFF cycle), check the instrument panel
(warning lights, internal connections, etc.). Perform any required repairs or replace the instrument panel if
necessary.
● If the voltmeter does not show the battery voltage (three 2-second ~ ON-OFF cycles), contact the techline.

AFTER REPAIR Repeat the conformity check from the start.

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Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

SEVERE INJECTION FAULT WARNING LIGHT (severity 2)

AC596

Perform this fault finding procedure after noting a malfunction in the "command"
menu.
NOTES
Special notes:
This warning light is shared with the coolant temperature warning light.

Check the instrument panel connectors.

Check the connectors on the engine management computer.
Repair if necessary. Repair if necessary.
Using the wiring diagram:
– Check the continuity and absence of interference suppresser on the connection between:
Engine management computer, connector C track D4 track 17 instrument panel
30-track connector
– Check for the presence of + 12 Volts battery on track 4 of the instrument panel 30-track connector.

If the problem persists, check that the overheating warning light is controlled by the engine management
computer as follows:
Disconnect the 30-track connector from the instrument panel and connect a voltmeter as follows:
– positive terminal on + 12 V battery
– negative terminal on track 17 of the instrument panel 30-track connector.
Run the warning light via command AC596.
● If the voltmeter shows the battery voltage (one ~ 2-second ON-OFF cycle), check the instrument panel
(warning lights, internal connections, etc.). Perform any required repairs or replace the instrument panel if
necessary.
● If the voltmeter does not show the battery voltage (three 2-second ~ ON-OFF cycles), contact the techline.

AFTER REPAIR Repeat the conformity check from the start.

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 EDC15C13 DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands 13B
DAMPER VALVE
AC593

Carry out this fault interpretation:

– according to DF019: 2.DEF "Air flow circuit sensor",
NOTES
– in the case of incorrect operation detected in the "command "menu.
– or after a customer complaint (starting problems, poor performance).

– Check the resistance of the damper valve solenoid valve between tracks 1 and 2.
Replace the solenoid valve if its resistance is not 46 Ω ± 3 at 25°°C.
– Check the following connections for continuity and make sure there is no extraneous resistance:
Engine management computer, connector C track A1 track 1 solenoid valve connector.
+ 12 V after relay track 2 solenoid valve connector.

A) Engine running at idling speed:

– Make sure there is a vacuum pressure of ~900 mb in the solenoid valve intake hose.
Make the necessary repairs (vacuum pressure circuit conformity and seal).
With the vehicle ignition on, engine stopped:
– Make sure the damper flap is open,
If not, clean or replace the air vent unit.
– Disconnect the solenoid valve inlet and outlet hoses,
– Connect a vacuum pump to the inlet union and apply a vacuum pressure of ~ 900 mbar
If there is a leak, replace the solenoid valve.
– Run the warning light via command AC593.
– If the solenoid valve opens (vacuum pump pressure gauge returns to atmospheric pressure), go to step C.
– Otherwise, with the solenoid valve connected, check operation of the computer output stage with a
voltmeter:
Voltmeter earth cable track 1 of the solenoid valve
Voltmeter positive lead track 2 of the solenoid valve
Clear any solenoid valve faults,
Run the warning light via command AC593.
The voltmeter should display three cycles "ON-OFF" 12.5 V then return to 0 V).
If the measurement is correct, replace the solenoid valve.
If the measurement shows no control, contact your Techline.
C) Vehicle with ignition off:
– Connect a vacuum pump to the flap control diaphragm and apply a negative pressure of ~ 900 mbar:
– If the diaphragm does not maintain the negative pressure, replace the air vent unit (the diaphragm cannot
be disconnected).
– If the diaphragm maintains the vacuum pressure and the flap does not operate, clean or replace the air
vent unit.
– If the diaphragm maintains the negative pressure and the flap operates, perform several checks to
ensure that there is no blockage.
Check for clogging of the air vent unit and its flap, and clean if necessary.

AFTER REPAIR Repeat the conformity check from the start.

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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

SWIRL VALVE
AC594

Carry out this fault interpretation:

– according to DF017 "Turbulence cover (1.DEF)"
NOTES
– in the case of incorrect operation detected in the "command" menu
– or after a customer complaint (lack of performance).

– Check the resistance of the swirl flap solenoid valve between tracks 1 and 2.
Replace the solenoid valve if its resistance is not 46 Ω ± 3 at 20°°C.
– Check the continuity and absence of interference suppresser on the connections between:
Engine management computer, connector C track B1 track 1 solenoid valve connector.
12 V after relay (injection) track 2 solenoid valve connector.

A) Engine running at idling speed:

– Make sure that there is a negative pressure of ~900 mb in the solenoid valve intake hose.
Make the necessary repairs (vacuum pressure circuit conformity and seal).
B) Vehicle with ignition on, engine stopped: check the solenoid valve seal,
– Disconnect the solenoid valve inlet and outlet hoses,
– Connect a vacuum pump to the inlet union and apply a vacuum pressure of ~900 mbar
If there is a leak, replace the solenoid valve.
– Run the warning light via command AC594.
– If the solenoid valve opens (vacuum pump pressure gauge returns to atmospheric pressure), go to step C.
– Otherwise, with the solenoid valve connected, check operation of the computer output stage with a
voltmeter:
Voltmeter earth cable track 1 of the solenoid valve
Voltmeter positive lead track 2 of the solenoid valve
Clear any solenoid valve faults,
Run the warning light via command AC594.
The voltmeter should display three cycles "ON-OFF": (12.5 V then return to 0 V).
If the measurement is correct, replace the solenoid valve.
If the measurement does not show any lights, contact the techline.
C) Vehicle with ignition off:
– Connect a vacuum pump to the flap control diaphragm and apply a negative pressure of ~900 mbar:
– If the diaphragm does not maintain the vacuum pressure, replace the air distributor (the diaphragm
cannot be disconnected).
– If the diaphragm maintains the vacuum pressure and no movement is felt* in the flap, replace the air
distributor.
– If the diaphragm maintains the vacuum pressure and movement is felt* in the flap, replace the solenoid
valve.
(treat as a priority the fault DF019 Air flow circuit sensor or DF077 EGR valve or DF205 Air intake circuit
if at least one of the three faults is present or stored).

*knocking inside the air distributor when the control vacuum pressure is attained.

AFTER REPAIR Repeat the conformity check from the start.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

AIR CONDITIONING COMPRESSOR

AC599 (check that the computer is correctly configured)

No fault should be present or stored:

Perform this fault finding procedure after detecting a malfunction in the "command"
NOTES menu or following an air-conditioning problem.
Refer to the "Technical Note "Wiring diagrams" for your vehicle to locate the relevant
fuses and relays.

If when the command AC599, is issued, the compressor relay does not engage:
– Check the insulation, continuity and for absence of interference suppresser in the connection between:
Engine management computer, connector A track G3 track 2 Compressor relay mounting
– Check the compressor relay coil power feeds:
Compressor relay mounting track 1 + 12 V after relay
– If the problem persists, check that the compressor relay is controlled by the engine management computer
as follows:
Remove the compressor relay, put a 50 to 100 Ω resistor on the mounting in place of (tracks 1 and 2),
reconnect the negative (-) voltmeter terminal to track 2 of the relay mounting and the positive (+) voltmeter
terminal to track 1 of the relay mounting:
Actuate the warning light using command AC599:
If the voltmeter does indicates the battery voltage (three ON-OFF cycles), replace the compressor relay.
If the voltmeter does not indicate the battery voltage (three ON-OFF cycles), contact the Techline.
If, when running command AC599, the compressor relay engages, but the compressor does not engage:
– Make sure the resistance of the compressor clutch coil is 3.5 Ω ± 0,5.
Also check the insulation of the coil against the compressor body.
– Check the earth on track B of the compressor connector.
– Check the insulation and continuity of the following connection:
Compressor relay mounting track 5 track A of the compressor connector
– Check the power supply of the "Normally Open" compressor relay contact:
Compressor relay mounting track 3 + 12 V after ignition
– Check the conformity of the " Normally Open" compressor relay contact:
Continuity between tracks 3 and 5 when the relay is supplied
Carry out the necessary repairs.

AFTER REPAIR Repeat the conformity check from the start.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Interpretation of commands

INCREASE IN FAST IDLE SPEED, COMMERCIAL VEHICLE

VP028 DECREASE IN FAST IDLE SPEED, COMMERCIAL VEHICLE
VP029

This setting ensures that the specific idling speed can be adjusted for commercial
vehicles fitted with additional accessories requiring a specific engine speed. It does not
have any effect on the vehicle's idling speed.
Special notes: incrementation or decrementation is possible with the engine at idle
NOTES speed or stopped.(Without+ APC)
If no adjustments have previously been carried out, the specific idling speed default
value is 1000 rpm.
When saving computer data via the command SC005 the value of the specific speed
for commercial vehicles is saved.

Execute the command dedicated to the specific function.

Check that the state ET186 "Electric windscreen de-icer" is set to "ON".
If the state ET186 is at STOPPED, refer to the Diagnostic-Interpretation of states section dealing with state
ET186: Electric windscreen de-icer.
From the COMMANDS menu, choose the tab SETTINGS and select the specific settings:
VP028 INCREASING FAST IDLE SPEED FOR COMMERCIAL VEHICLES to increase the idling speed to the
desired value.
VP029 INCREASING FAST IDLE SPEED FOR COMMERCIAL VEHICLES to decrease the idling speed to
the desired value.
The increase or decrease is done in steps of 100 rpm
The specific idle speed adjustment range for commercial vehicles is comprised between 1000 rpm and
2000 rpm.
Note:
If the "Commercial vehicle specific idling speed." value is greater that 1300 rpm then the user cannot drive
the vehicle during the activation phase of this function.

Switch off vehicle engine and carry out a test.

AFTER REPAIR
Repeat the conformity check from the start.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Customer complaints

Before carrying out the steps associated with customer complaints, check for the
absence of faults and the conformity (or otherwise) of the "parameters" and "states",
NOTES using the fault finding tool.
If the customer complaint is not eliminated, then proceed according to the
corresponding fault finding chart.

FAULT FINDING
NO COMMUNICATION WITH THE COMPUTER
CHART 1

FAULT FINDING
STARTING DIFFICULT OR IMPOSSIBLE
CHART 2

FAULT FINDING
INJECTION NOISE
CHART 3

FAULT FINDING
POOR PERFORMANCE
CHART 4

FAULT FINDING
IRREGULAR ENGINE OPERATION
CHART 5

FAULT FINDING
INJECTOR MALFUNCTION
CHART 6

EDC15C13, CB, V19, Passenger vehicle Version 1.0

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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Fault finding chart

FAULT FINDING
No communication with the engine management computer
CHART 1

Check the conformity of the vehicle type and the domain selected on your tool.
Make sure that the tool is not faulty by trying to establish dialogue with a computer on another vehicle.
Check the supply to the diagnostic socket:

+ Before ignition on track 16 / + after ignition feed on track 1/ Earth on tracks 4 and 5

Check (according to wiring diagram and equipment):

– The conformity of the After ignition fuse.
– The conformity of the injection relay mounting.
– The conformity of the impact sensor: continuity between its tracks 1 and 3 In rest position (before impact)
12 V battery feed track 3 (by fuse)
continuity between track 3 and track 1 of the injection relay
– The conformity of the injection relay: 65 Ω ± 5 Ω between tracks 1 and 2
infinite resistance between tracks 3 and 5 (open contact)
resistance < 0.2 Ω between tracks 3 and 5 (closed contact)
Disconnect the engine management computer and check for the absence of conducting elements on the
computer studs. If this reveals any kind of impurity, rectify it and try to establish dialogue.

If the fault persists, place the bornier Elé. 1613 on the engine harness:
Check for continuity and absence of interference suppresser on the following connections:
Engine management computer, connector A track F2 Diagnostic socket track 7
line K
Engine management computer, connector A tracks E2 Diagnostic socket track 15
(line L, if wired),
Ensure that the power supplies are in order:
Engine management computer connector B track A1 + After ignition,
Engine management computer, connector A tracks E2 Earth,
By shunting the normally open contact of the central injection unit supply relay, tracks 3 and 5 of the relay
mounting:
Engine management computer, connector B tracks M3 and M2 + 12 V battery (via test
shunt)
Check the continuity of the connection between:
Engine management computer, connector B track F1 track 2 of the central
injection unit supply
relay mounting.

Continued on next page

AFTER REPAIR Carry out a road test followed by a fault finding tool check.

EDC15C13, CB, V19, Passenger vehicle Version 1.0

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 DIESEL INJECTION SYSTEM
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EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Fault finding chart

FAULT FINDING
CHART 1

CONTINUED

Carry out the checks on the previous page.

Try to establish dialogue with another computer on the same vehicle.

If you can communicate with another computer on the same vehicle go to Step 2
If dialogue cannot be established with any other computer on the same vehicle, the cause could be a
faulty computer interfering on the K and/or L lines. To locate it, proceed by elimination by successively
disconnecting all the computers connected to these lines (using wiring diagram and depending on equipment):
air conditioning, air bag, ABS and ESP, UCH, instrument panel, central communication unit, proximity sensor.
Try to establish dialogue
between each disconnection:
If, after a disconnection, you manage to establish dialogue, perform the fault finding procedure for the relevant
computer.
If the problem persists, reconnect the computers listed above and disconnect the engine
management computer. Try to establish dialogue with another computer.
If you manage to establish dialogue, go to Step 2.
If you still cannot establish dialogue, disconnect all the computers connected to lines K and/or
L and check the insulation against + 12 Volts and against earth on track 7 and track 15 of the
diagnostic socket. Carry out the necessary repairs.

Step 2
Contact the techline.

AFTER REPAIR Carry out a road test followed by a fault finding tool check.

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 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Fault finding chart

FAULT FINDING
Starting problems (or starting impossible)
CHART 2

Before dealing with this customer complaint, check for the absence of faults,
and conformity (or otherwise) of parameters and states, using the fault finding
NOTES
tool.
If the customer complaint is not resolved, perform the following checks:

impossible
Is starting difficult or impossible?

difficult

Check the engine earths.

Make sure that the engine speed reaches 250 rpm when the starter motor is operated, displayed in the
parameter screen.
Ensure that the correct fuel is being used.
Check the priming of the low pressure diesel circuit:
– low pressure for CP3 pump: > 1.5 bar with low pressure pump relay controlled.
– (-100 mb maximum, engine running and low pressure pump relay not controlled).
Check the conformity of the diesel filter connections.
Ensure that the fuel filter is not saturated with water.
Check there are no air bubbles between the filter and the high pressure pump.
Check the heater plugs are working properly using command AC010.
Check the condition of the air filter (clogging).
Check the tightness of the high pressure diesel circuit; pump, pipes, unions (visual check + odours).
Check the position of the exhaust gas recirculation valve (blocked, mechanically seized). See command
interpretation AC007 "EGR valve").
Check the consistency of the signal from the engine coolant temperature sensor.
Check the pressure regulator is working properly (see command AC006 "Fuel pressure solenoid valve").
Ensure correct operation of the injectors (return leakage too high, clogging, sticking: see injector fault finding
procedure).
Check that the compressions are balanced, in accordance with the current consumption in the starting phase
("compression test" menu on the Clip tool).
In the event of imbalance, use a compression gauge to refine the reading (see the method in the
Workshop Repair Manual). After the operation, clear the faults caused by disconnecting the
regulator and the heater plugs.

AFTER REPAIR Carry out a road test followed by a fault finding tool check.

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 DIESEL INJECTION SYSTEM
EDC15C13
Program No.: CB
Vdiag No: 19 Fault finding - Fault finding chart 13B
FAULT FINDING
CHART 2

CONTINUED

ET003 not in order, or

immobiliser warning From the "STATUS" menu on your fault finding tool, check the conformity
light continuously lit of the immobiliser system ET003: Engine immobiliser; it should be
INACTIVE.

ET003 in order (Immobiliser code

warning light switched off)

Consult the engine Check that the intake flap is open (depending on the engine, see command
immobiliser fault finding interpretation AC593)
procedure. Check the battery charge and the condition and tightness of its terminals.
Ensure that engine speed reaches 250 rpm when the starter motor is
operated. This is displayed on the parameter screen.
Check the engine earths.
Check the conformity of the inertia switch (according to equipment)
Check the presence and conformity of fuel in the tank.
Check for the presence of 12 volts after relay on tracks M2 and M3 of
connector B of the engine management computer, (via injection relay)
Check the engine fuses (and their mountings, wires and terminals).
Check the timing setting (and
the position of the high
pressure pump sprocket). test
YES
(see method in Workshop Operate the starter:
Repair Manual if Does the pressure increase in the rail:
necessary). High pressure = approx. 170 bar at
Check the cylinder balance approx. 250 rpm?
using the Clip function,
physical measurement icon
"Compression test". NO

Carry out the regulator and high pressure pump diagnostic by applying
command interpretation: AC006 Fuel pressure solenoid valve"

AFTER REPAIR Carry out a road test followed by a fault finding tool check.

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 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Fault finding chart

FAULT FINDING
Injection noise
CHART 3

Before dealing with this customer complaint, check for the absence of faults,
and conformity (or otherwise) of parameters and states, using the fault finding
NOTES
tool.
If the customer complaint is not resolved, perform the following checks.

If the injection noise occurs after starting from cold:

Check the priming of the low pressure fuel circuit.
Check the fuel heater supply.
Check the operation of the preheating system.
Check that fuel and engine temperatures are consistent.
If the cause of complaint persists, check rail pressure (settings menu) and run command AC006: Fuel
pressure solenoid valve.

Does the injection noise occur at idling speed?

Check the condition of the injector connector and pressure regulator terminals.
Check the conformity of the air flow signal (fault finding procedure: PR050).
Check the position of the exhaust gas recirculation valve (use fault finding procedure: AC007).
If the fault persists, carry out the injector fault finding procedure.
Does the injection noise occur at all engine speeds?
Carry out an injector fault finding check.
Check the condition of the injector connector and pressure regulator terminals.
Ensure that the correct fuel is being used.
Check the conformity of the airflow signal (use diagnostic interpretation: PR050 "Airflow
measurement").
If the effect persists, check rail pressure (settings menu) and carry out the diagnostic: AC006 "Fuel pressure
solenoid valve".

If the injection noise occurs at transitional speed:

If the engine races during gear changes, check the conformity of the clutch switch.
During a road test, when changing gear, display parameter: PR202 if it varies, without notable influence on the
pressure rail carry out the fault finding procedure: AC006 "Fuel pressure solenoid valve"
If the fault persists, perform the injector fault finding procedure (see Customer complaints section).

AFTER REPAIR Carry out a road test followed by a fault finding tool check.

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 EDC15C13 DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Fault finding chart 13B
FAULT FINDING
Poor performance
CHART 4

Before dealing with this customer complaint, check for the absence of faults,
and conformity (or otherwise) of parameters and states, using the fault finding
NOTES
tool.
If the customer complaint is not resolved, perform the following checks.

WARNING
In the case of overheating of more than 119°°C, the computer voluntarily limits the fuel flow (ignition overheating
warning from 115°°C).

Is the poor performance accompanied by smoke? NO

YES

Check:
– That the turbocharger control is not blocked. Apply command interpretation: AC004
"Turbocharging limitation valve".
– That the exhaust gas recirculation valve is not stuck open. Apply command interpretation AC007
"EGR valve"
– That the injectors are properly fitted (sealing washer in place and in order).

Is the engine running on all cylinders?

NO

Ensure correct operation of the injectors: see the injector fault finding procedure in Customer
complaints.
If the fault persists:

Carry out the check conformity for the accelerator pedal sensor, for the brake pedal sensor, for the
atmospheric pressure sensor, for the exhaust gas recirculation valve and for the intake flap.
– Check the condition of the air filter,
– Check consistency of the following signals: flowmeter, coolant temperature sensor, fuel-temperature
sensor, engine speed
No foreign bodies on the flowmeter grille (visual check only).
Check that the swirl flap is open at rest position: command interpretation AC594 "Swirl flap"
(depending on features).
Check: – That the diesel filter is not clogged
– There are no leaks on the low and high pressure diesel circuit
– The air intake circuit (sealing ring and not blocked)
– The connection of the oil vapour rebreathing circuit
– The flow regulator (blocked - seized, consult command interpretation: AC006 "Fuel
pressure solenoid valve")
– The turbo command (blocked/seized, consult command interpretation: AC004:
"Turbocharging pressure-limitation valve")
– Check the engine compression.(Cylinder compression balance via function Compression test on the
CLIP tool)
– Check that the exhaust pipe is not blocked.

AFTER REPAIR Carry out a road test followed by a fault finding tool check.

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 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Fault finding chart

FAULT FINDING
Irregular engine operation
CHART 5

Before dealing with this customer complaint, check for the absence of faults,
and conformity (or otherwise) of parameters and states, using the fault finding
NOTES
tool.
If the customer complaint is not resolved, perform the following checks.

If the engine bucks or races during gear changes, check the conformity of the clutch switch.
If the fault persists:
– Ensure that the correct fuel is being used.
– Check the priming of the low pressure fuel circuit and check that the diesel filter is connected correctly and
is not saturated with coolant.
– Check that there are no air bubbles between the filter and the high pressure pump.
– Check the conformity of the rail pressure (warm engine):
± 25 bar around the rail pressure value at idle speed, (the minimum to maximum variations in the
rail pressure at idle speed should not exceed 50 bar).
approx. 1350 bar under load with foot hard down on the accelerator.
In the event of a problem, apply command interpretation AC006: Fuel pressure solenoid valve
– Check the conformity of the airflow signal (use diagnostic interpretation: PR050 Airflow measurement).
If the fault persists:
– Check the injectors: with engine running at idling speed, disconnect the injectors one after the other:
Replace the injector which causes no variation in operation when it is disconnected. Clear the faults
caused by multiple disconnections, followed by a road test to confirm the repair.
– Check cylinder balancing using the CLIP function, physical measurement icon "Compression test",
– Check engine compression where necessary.

AFTER REPAIR Carry out a road test followed by a fault finding tool check.

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 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Fault finding chart

FAULT FINDING
Injector malfunction
CHART 6

Before dealing with this customer complaint, check for the absence of faults,
and conformity (or otherwise) of parameters and states, using the fault finding
NOTES
tool.
If the customer complaint is not resolved, perform the following checks.

Preliminary checks:
– Check the resistance between tracks 1 and 2 of each injector: 0.33 Ω at 20°°C / 2 Ω maximum.
– Check the insulation, continuity and absence of interference suppresser on the following connections:
Engine management computer, connector C track G3 track 2 of the connector for
injector No. 1
Engine management computer, connector C track G1 track 1 of the connector for
injector No. 1
Engine management computer, connector C track H4 track 2 of the connector for
injector No. 2
Engine management computer, connector C track G2 track 1 of the connector for
injector No. 2
Engine management computer, connector C track G4 track 2 of the connector for
injector No. 3
Engine management computer, connector C track H2 track 1 of injector no. 3
connector
Engine management computer, connector C track H3 track 2 of the connector for
injector No. 4
Engine management computer, connector C track H1 track 1 of the connector for
injector No. 4
A) Checking the fuel regulation balance injector by injector:
– Select the Function menu on the fault finding tool.
– Select the Fuel pressure regulation function.
– With the engine idling, engine coolant temperature > 50 ˚C for 3 minutes, display the flow adjustment
values, injector by injector, i.e. PR524, 589, 590 and 525 (FUEL FLOW ADJUSTMENT CYLINDER No 1,
No 2, No 3 and No 4)
The normal flow adjustment value for an injector is approximately ± 1 mm3. This tolerance value may
increase with time, but indicates an injector / cylinder fault if it exceeds ± 5 mm3.
a) If at least one of these values > + 5 mm3
– Check the valve clearance.
– Check the condition of the engine with the "Compression test" function available on CLIP, "Physical
measurements" icon.
– If the 4 cylinders have the same stroke speed, replace the injector* with the largest adjustment.
– If there is a difference between the cylinders, check the compression with a flow adjustment furthest from
the normal value.
– If the compression test reveals a cylinder fault, carry out the necessary repairs.
– If the compression is correct, replace the injector* of the cylinder with the largest adjustment.
– Refer to section "B" to confirm fault finding.

AFTER REPAIR Carry out a road test followed by a fault finding tool check.

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 EDC15C13 DIESEL INJECTION SYSTEM
Program No.: CB
Vdiag No: 19
Fault finding - Fault finding chart 13B
FAULT FINDING
CHART 6

CONTINUED 1

Before dealing with this customer complaint, check for the absence of faults,
and conformity (or otherwise) of parameters and states, using the fault finding
NOTES
tool.
If the customer complaint is not resolved, perform the following checks.

b) If at least one of these values >± ± 5 mm3

– Check the valve clearance.
– Remove the injector with the largest adjustment.
– Check the level and condition of the engine oil.
– If there is contamination from diesel fuel, check the condition of the relevant cylinder (cylinder, piston,
valves).
– Replace the injector*.
– Refer to section "B", to confirm fault finding.
Note:
Before replacing an injector, check that its sealing ring is in place and to specification.
After replacing an injector, and if the IMA is active, follow the injector code programming procedure (see
following page)
WARNING
When removing or refitting the injectors, follow the cleanliness and safety instructions in Section 13B of the
Workshop Repair Manual.
B) Confirming fault finding on the flow adjustment injector by injector:
Clear the fault(s) and carry out a test with the engine idling, engine coolant temperature > 50 °C for
3 minutes and check that no fault is displayed on the fault finding tool and that the adjustment values do not
reach ± 5 mm3 to confirm the repair.
– If another cylinder (other cylinders) has (have) flow adjustment values per injector > ± 5 mm3 , then follow
the fault finding procedure outlined in A) Checking the fuel regulation balance injector by injector.
– If all of the adjustment values are approximately ± 1 mm3 , fault finding is complete.
– If the repairs carried out have not repaired the engine, contact the techline.
C) Checking the injector return flow balancing
– Warm up the engine until the engine coolant temperature is at > 50 °C
– Switch off the vehicle ignition.
– Protect the upper engine edges with rags (mainly around the injectors).
– Disconnect the injector return pipes
– Start the engine and let it idle.
– Check the return flow balance of each injector, in general, the return flows are not large. They should not
resemble a jet.
– Replace the injector* with a return flow that is inconsistent with the other injectors (it should resemble a small
jet).
– Clear any faults and confirm the repairs with a road test.

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 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Fault finding chart

FAULT FINDING
CHART 6

CONTINUED 2

Before dealing with this customer complaint, check for the absence of faults,
and conformity (or otherwise) of parameters and states, using the fault finding
NOTES
tool.
If the customer complaint is not resolved, perform the following checks.

In the event of under-pressure in the rail:

Replace the injector with a return flow that shows a more significant leak than any of the others.
In CP3 if the engine does not start:
The return flow can be checked during and after a starting test (minimum 250 rpm)
This causes increased pressure in the rail and enables analysis of the return flows.
– Disconnect from the pressure regulator.
– Fit take-off pipes to the injector returns, leading into measuring cylinders.
– Start the engine and check the return flow balance of each injector (in general, the return flows are not large.
They should not resemble a "jet").
– Replace the injector whose return shows a stronger leak than the others.
– After completing this operation, clear the fault caused by disconnecting the pressure regulator.
D) Checking the injector nozzle sealing ring:
– Check the level and condition of the engine oil:
– If there is pollution from diesel fuel, the injector nozzle that is leaking will be covered in soot and the cylinder
will be greasy.
Ensure that this is not caused by rising engine oil by checking the engine compression values.
If the compression values are correct, locate the faulty injector by examining the condition of the cylinders and
the pistons across the heater plug wells (greasy cylinder, piston overheated, starting to disintegrate, etc.).
If a visual inspection of the cylinder/piston is not conclusive, remove the injectors and replace the one that has
a nozzle covered in soot.
Note*:
Before replacing an injector, check that its sealing ring is in place and to specification.
WARNING
When removing or refitting the injectors, follow the instructions (see section 13B of the Workshop Repair
Manual).

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 DIESEL INJECTION SYSTEM
13B
EDC15C13
Program No.: CB
Vdiag No: 19
Fault finding - Glossary

Injection computer 128 racks (test bornier part number: Element 1613)
Injector 0.33 Ω at 20°°C / 2 Ω maximum
Flow controller (high pressure pump) R = 3 Ω at 20°°C
Engine speed sensor R = 200 to 270 Ω at 23°°C on (G9)
Engine speed sensor R = 800 Ω ± 80 at 20°°C on (F9)
Camshaft sensor Hall effect sensor
Rail pressure sensor Screwed on rail
Pressure limiter (on pump CP3) Start of opening approx. 1450 bar, maximum opening at
1650 bar
(screwed to the rail)
Turbocharging limitation solenoid valve 15.4 Ω ± 0.7 at 20°°C, (PIERBURG brand)
16.5 Ω ± 1.6 at 25°°C, (BITRON brand)
Swirl solenoid valve 46 Ω ± 3 at 25 °C
Damper-valve solenoid valve 46 Ω ± 3 at 25 °C

Accelerator pedal sensor R track 1 = 1200 Ω ± 480

R track 2 = 1700 Ω ± 680
Air temperature sensor R = 3714 Ω ± 161 at 10°°C / 2448 Ω ± 90 at 20°°C/ 1671 Ω ± 59 at
30°°C
Diesel temperature sensor R = 3820 Ω ± 282 at 10°°C / 2050 Ω ± 100 at 25°°C / 810 Ω ± 47 at
50°°C
Engine coolant temperature sensor R = 2252 Ω ± 112 at 25°°C / 811 Ω ± 39 at 50°°C / 283 Ω ± 8 at
80°°C

Air flowmeter track 1: Air temperature signal track 4: + 12 V battery

track 2: - Flowmeter track 5: Air flowmeter signal
track 3: + 5 V flowmeter Track 6: Earth

Exhaust gas recirculation valve R between tracks 1 and 5 (coil): = 8 Ω ± 0.5 at 20°°C
Heater plug R = 0.4 to 0.9 Ω
Max. current consumed: 28A at 0 seconds / 12A at 10 seconds /
7A after 30 seconds
heating elements R = 0.45 Ω ± 0.05 at 20°°C
(R = resistance)

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