13B-7V4 MR-372-J84-13B000$010.mif
DIESEL INJECTION
Fault finding – Introduction13B
DDCR INJECTION
Vdiag No.: 44, 48
Advice to be followed before any operation
Protect the accessories and timing belts, the electrical accessories (starter, alternator, electric power assisted
steering pump) and the mating face to prevent diesel fuel spilling onto the clutch friction plate).
Check that you have plugs for the unions to be opened (set of plugs available from the Parts Department). The plugs
are single-use only. After use, they must be discarded (once used they are soiled and cleaning is not sufficient to
make them reusable). Unused plugs must be discarded.
Ensure that you have hermetically resealable plastic bags for storing removed parts. Parts stored in this way will be
less susceptible to the risk of contamination. These are single-use bags; after use they must be discarded.
Use lint-free cleaning cloths (part no. 77 11 211 707). Using normal cloth or paper is prohibited. They are not lint-free
and could contaminate the fuel circuit. Each cloth should only be used once.
Use fresh cleaning agent for each operation (used cleaning agent is contaminated). Pour it into an uncontaminated
container.
For each operation, use a clean brush in good condition (the brush must not shed its bristles).
Use a brush and cleaning agent to clean the unions to be opened.
Blow compressed air over the cleaned parts (the tools and workbench, as well as the parts, unions, and injection
system sections). Check that no bristles remain.
Wash your hands before and during the operation if necessary.
When wearing leather protective gloves cover them with latex gloves to prevent contamination.
Instructions to be followed during the operation
As soon as the circuit is open, all openings must be plugged to prevent impurities from entering the system.
The plugs to be used are available from the Parts Department. They must not be reused under any circumstances.
Close the hermetically sealed 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 plugged.
Using a brush, cleaning agent, air gun, sponge or normal cloth is strictly prohibited once the circuit has been
opened. These items are likely to allow impurities to enter the system.
A new component replacing an old one must not be removed from its packaging until it is to be fitted to the vehicle.
13B-13V4 MR-372-J84-13B000$020.mif
DIESEL INJECTION
Fault finding – System operation13B
DDCR INJECTION
Vdiag No.: 44, 48
Cruise control/speed limiter 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 by using the control buttons or by switching off the cruise
control function selection switch, or when system events are detected such as depressing the brake or clutch
pedals, 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 depressing the accelerator pedal which then
exceeds the selected fuel flow. The cruising speed is resumed when the driver releases the accelerator pedal.
The cruise control function can be reactivated and the last cruising speed can be resumed after deactivating
the function for whatever reason until the vehicle ignition is switched off (i.e. for as long as computer supply not cut
off). The vehicle will then attempt to return to the cruising speed using a controlled vehicle acceleration rate.
When switched on (using the selection switch), the vehicle speed limiter function limits the vehicle speed to a preset
value. The driver controls the vehicle in the normal way using the accelerator pedal until the limit speed is reached.
If an attempt is made to exceed this speed, the system will ignore the pedal request and will control the vehicle
speed as the cruise control function would do, provided that the driver continues to press the accelerator pedal.
As with the cruise control function, the set speed can be altered by adjusting the control buttons, with single touches
or holding down.
For safety reasons, the cruising speed can be exceeded by depressing the accelerator pedal beyond the pedal
position limiting value. Vehicle speed is then controlled using the accelerator pedal until the vehicle speed is
decreased to below the cruising speed, when the limiter function is activated again.
The driver has the following controls for the cruise control/speed limiter function:
– accelerator pedal,
– brake pedal,
– clutch pedal,
– function selector switch, used to select cruise control or speed limiter operating mode.
Instrument panel display
The computer displays certain information on the instrument panel relating to engine operation. This concerns 5
functions: the MIL (Malfunction Indicator Lamp) of the EOBD (European On Board Diagnostic), pre-postheating,
the coolant temperature, and engine faults: Level 1 (non-critical fault) and Level 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 light is used both as an in-operation indicator light and as a system fault indicator:
– permanently lit during + after ignition feed: indicates preheating of the heater plugs.
After preheating and an automatic timed 3 second off period, the warning light will come on if a Level 1 fault occurs
(leading to reduced operation and reduced safety levels. The driver should have repairs carried out as soon as
possible.)
13B-15V4 MR-372-J84-13B000$020.mif
DIESEL INJECTION
Fault finding – System operation13B
DDCR INJECTION
Vdiag No.: 44, 48
32-TRACK BLACK CONNECTOR A
Description Tracks Tracks Description
Not used A1 E1 Not used
Cruise control On/Off A2 E2 Not used
CAN L1 A3 E3 Not used
CAN H1 A4 E4 Closed contact Stop signal
Not used B1 F1 Not used
Not used B2 F2 Potentiometer supply Gang 2
Not used B3 F3 Potentiometer signal Gang 2
Diagnostic line K B4 F4 Potentiometer earth Gang 2
Not used C1 G1+After ignition supply
Not used C2 G2 Potentiometer supply Gang 1
Speed limiter on/off C3 G3 Not used
Clutch switch information C4 G4 Earth
+After ignition supply D1 H1 Earth
Cruise control switch signal D2H2 Potentiometer signal Gang 1
Cruise control switch earth D3H3 Potentiometer earth Gang 1
Not used D4 H4 Earth
NOTE:
The supply voltage on track G1 is not measurable when the computer connector is disconnected.
13B-82
AFTER REPAIRDeal with any faults declared by the diagnostic tool. Clear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
V4 MR-372-J84-13B000$062.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DDCR INJECTION
Vdiag No.: 44, 48
DF1070
PRESENT
OR
STOREDCOLD LOOP
1.DEF: Jammed component
NOTESConditions for applying fault finding procedures to stored faults:
The fault is declared present with the engine running and with a climate control request.
Priorities when dealing with a number of faults:
– DF049 Refrigerant sensor circuit if it is present or stored.
When the fault is present or stored, the heating and air conditioning system is inhibited. There is no longer any air
conditioning.
Check fuse F22 (10 A) of the UPC, component code 1337.
Check the connector of the air conditioning compressor, component code 171.
If the connector is faulty and there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Check the wiring of the air conditioning compressor.
If the wiring is faulty and there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
Manually check if the compressor is jammed (turn the clutch plate manually to check that there is no point of
resistance). In the event of jamming, replace the air conditioning compressor (see MR 364 (Mégane II), MR 370
(Scénic II), Mechanical, 62A, Air conditioning, Compressor: Removal - Refitting).
Top up the refrigerant, check for any leaks, and repair if necessary (see MR 364 (Mégane II), MR 370 (Scénic II),
Mechanical, 62A, Air conditioning, Refrigerant circuit: Draining - Filling).
DDCR__V44_DF1070 / DDCR_V48_DF1070
13B-102V4 MR-372-J84-13B000$070.mif
DIESEL INJECTION
Fault finding – Conformity check13B
DDCR INJECTION
Vdiag No.: 44, 48
CRUISE CONTROL - SPEED LIMITER SUB-FUNCTION (continued 1):
NOTESOnly check conformity after a full check with the diagnostic tool.
The values shown in this conformity check are given as examples.
Application conditions: Engine off, ignition on.
FunctionParameter or
Status Check
or actionDisplay and notes Fault finding
Brake contactET704: Brake
switch No. 1- INACTIVE
- ACTIVE (brake pedal depressed)Consult the
interpretation of status
ET704 Brake switch
No. 1
ET705: Brake
switch No. 2- ACTIVE (brake pedal released)
- INACTIVEConsult the
interpretation of status
ET705 Brake switch
No. 2
Clutch pedal
switchET405: Clutch
pedal switch- ACTIVE
- INACTIVEConsult the
interpretation of status
ET405 Clutch switch
Cruise control
setpointPR130: Cruise
control setpointIndicates the reference value requested by
the driver (in mph (km/h))NONE
Vehicle speedPR089: Vehicle
speed0 mph (km/h)
Gives the vehicle speed in mph (km/h). This
parameter is transmitted by the ABS computer or
vehicle speed ECU*. This signal is transmitted to
the injection on the multiplex network.Test the multiplex
network. See fault
finding for the ABS
system or the
vehicle speed ECU*.
13B-103V4 MR-372-J84-13B000$070.mif
DIESEL INJECTION
Fault finding – Conformity check13B
DDCR INJECTION
Vdiag No.: 44, 48
CRUISE CONTROL - SPEED LIMITER SUB-FUNCTION (continued 2):
*ECU: Electronic control unit
NOTESOnly check conformity after a full check with the diagnostic tool.
The values shown in this conformity check are given as examples.
Application conditions: Engine off, ignition on.
FunctionParameter or
Status Check
or actionDisplay and notes Fault finding
Cruise control/
speed limiter
deactivationET415: Cruise
control - speed
limiter
deactivationNONE: This status is present on the diagnostic tool
when:
The computer has been reinitialised,
The computer has been reprogrammed.
- STATUS 1: Traction control request
- STATUS 2: Brake pedal depressed.
- STATUS 3: Clutch pedal depressed.
- STATUS 4: Suspend button pressed
- STATUS 5: Cruise control or speed limiter
monitoring.
- STATUS 6: Gear lever in neutral (manual gearbox)
or in the neutral position (automatic transmission).
- STATUS 7: Inconsistency between the request
and the vehicle speed.
- STATUS 8: Automatic transmission in defect
mode.
- STATUS 9: Vehicle speed monitoring.
- STATUS 10: Monitoring by the injection computer.In the event of a fault,
consult the
interpretation of status
ET415 Cruise
control - speed
limiter deactivation.
13B-122V4 MR-372-J84-13B000$070.mif
DIESEL INJECTION
Fault finding – Conformity check13B
DDCR INJECTION
Vdiag No.: 44, 48
CRUISE CONTROL - SPEED LIMITER SUB-FUNCTION (continued 1):
NOTESOnly check conformity after a full check with the diagnostic tool.
The values shown in this conformity check are given as examples.
Application conditions: Engine off, ignition on.
FunctionParameter or
Status Check
or actionDisplay and notes Fault finding
Brake contactET704: Brake
switch No. 1- INACTIVE
- ACTIVE (brake pedal depressed)Consult the interpretation of
status ET704 Brake switch
No. 1.
ET705: Brake
switch No. 2- ACTIVE (brake pedal released)
- INACTIVEConsult the interpretation of
status ET705 Brake switch
No. 2.
Clutch pedal
switchET405: Clutch
pedal switch- ACTIVE
- INACTIVEIn the event of a fault,
consult the interpretation of
status ET405 Clutch
switch.
Cruise control
setpointPR130: Cruise
control
setpointIndicates the reference value requested by
the driver (in mph (km/h))NONE
Vehicle speedPR089: Vehicle
speed0 mph (km/h)
Gives the vehicle speed in mph (km/h). This
parameter is transmitted by the ABS computer
or vehicle speed ECU*. This signal is
transmitted to the injection on the multiplex
network.Test the multiplex
network. See fault finding
for the ABS system or the
vehicle speed ECU*.
13B-123V4 MR-372-J84-13B000$070.mif
DIESEL INJECTION
Fault finding – Conformity check13B
DDCR INJECTION
Vdiag No.: 44, 48
CRUISE CONTROL - SPEED LIMITER SUB-FUNCTION (continued 2):
*ECU: Electronic control unit
NOTESOnly check conformity after a full check with the diagnostic tool.
The values shown in this conformity check are given as examples.
Application conditions: Engine off, ignition on.
FunctionParameter or
Status Check
or actionDisplay and notes Fault finding
Cruise control -
speed limiter
deactivationET415: Cruise
control/speed
limiter
deactivationNONE: This status is present on the diagnostic
tool when:
The computer has been reinitialised,
The computer has been reprogrammed.
- STATUS 1: Traction control request
- STATUS 2: Brake pedal depressed.
- STATUS 3: Clutch pedal depressed.
- STATUS 4: Suspend button pressed
- STATUS 5: Cruise control or speed limiter
monitoring.
- STATUS 6: Gear lever in neutral
(manual gearbox) or neutral position
(automatic transmission).
- STATUS 7: Inconsistency between
the request and the vehicle speed.
- STATUS 8: Automatic transmission in defect
mode.
- STATUS 9: Vehicle speed monitoring.
- STATUS 10: Monitoring by the injection
computer.In the event of a fault,
consult the interpretation
of status ET415 "Cruise
control/speed limiter
deactivation".