13B-358
AFTER REPAIRRepeat the conformity check in the interpretation of statuses and parameters
V9 MR-372-J84-13B450$170.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
SC017
CONTINUED 3
●Particle filter regeneration failed - run test Temperature upstream of turbine too low: regeneration has
failed because the temperature upstream of the turbine is too low. Run Test 8 Temperature upstream of
turbine too low.
In all cases, carry out the following operations:
– switch off the ignition and wait for the diagnostic tool message (maximum time 8 minutes): Communication
lost with computer: EDC16C36, check the tool connection and the computer supply.
– switch on the ignition and establish dialogue with the injection computer,
– run command SC036 Reinitialise programming,
– depending on the operation performed, select After particle filter regeneration with diagnostic tool, or After
particle filter replacement
– switch off the ignition and wait for the diagnostic tool message (maximum time 8 minutes): Communication
lost with computer: EDC16C36, check the tool connection and the computer supply.
–Then switch on the ignition again, clear the present or stored faults from the computer memory (operation
to be carried out within 3 minutes of switching on the ignition).
– Check the weight of soot: PR383 Weight of soot in the particle filter.
– If PR383
≥ 1 g. Apply test procedure 12 Manual clearing of the weight of soot.
If DF308 Particle filter clogged or DF312 Speed request is still present, contact Techline.
Note:
It is essential to change the engine oil and the oil filter in the following cases:
– following an After-Sales regeneration only if a message on the CLIP diagnostic tool requests it,
– following particle filter replacement,
after a second regeneration (when two successive regenerations).
EDC16 C36
Program No.: 91
Vdiag No.: 48, 50, 58
13B-373
AFTER REPAIRRepeat the conformity check in the interpretation of statuses and parameters
V9 MR-372-J84-13B450$170.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
AC038LOW-SPEED FAN ASSEMBLY RELAY
NOTESThere must be no present or stored faults.
Perform this fault finding after an engine cooling fault or air conditioning fault.
Refer to the Wiring Diagram Technical Notes for the vehicle to locate the fuses and
relays concerned.
Ignition on and engine stopped.
Use Wiring Diagram Technical Note, Mégane II ph2, Scénic II ph2.
If the low speed fan assembly relay does not operate when command AC038 is run:
Check the low-speed fan assembly relay mounting and the connections of the engine management computer.
Check the fan assembly connections.
If there is a repair method (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise replace it.
If the fault is still present, check that the relay is actuated by the engine management computer as follows:
Disconnect the low-speed fan assembly relay, and fit 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 to connection 3JN of component 336.
Run command AC038
If the voltmeter shows the battery voltage (4 ON-OFF cycles of 10 seconds), replace the relay.
If the low speed fan assembly relay is supplied using command AC038, but there is still a fan assembly activation
fault, check using the wiring diagram.
The conformity of the fan assembly FM15 maxi-fuse.
EDC16C36_V44_AC038/EDC16C36_V4C_AC038/EDC16C36_V48_AC038/EDC16C36_V50_AC038/EDC16C36_V54_AC038/
EDC16C36_V58_AC038EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58
13B-375
AFTER REPAIRRepeat the conformity check in the interpretation of statuses and parameters
V9 MR-372-J84-13B450$170.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
AC039HIGH SPEED FAN ASSEMBLY
NOTESThere must be no present or stored faults:
Perform this fault finding after an engine cooling fault.
Refer to the Wiring Diagram Technical Notes for the vehicle to locate the fuses and
relays concerned.
Ignition on and engine stopped.
Use Wiring Diagram Technical Note, Mégane II ph2, Scénic II ph2.
If, when running command AC039, the high-speed fan assembly relay is not activated:
Check the high-speed fan assembly relay mounting and the connections of the engine management computer.
Check the fan assembly connections.
Repair if necessary.
If the fault is still present, check that the relay is actuated by the engine management computer as follows:
Disconnect the high speed fan assembly relay 335, fit a 50 to 100 Ω resistor on its mounting in place of the coil,
and connect a voltmeter as follows:
- positive terminal to +12 V battery,
- negative terminal to connection 3JP of component 335.
Run command AC039.
If the voltmeter shows the battery voltage (4 ON-OFF cycles of 10 seconds), replace the relay.
Disconnect the high speed fan assembly relay 337, fit a 50 to 100 Ω resistor on its mounting in place of the coil,
and connect a voltmeter as follows:
- positive terminal to +12 V battery,
- negative terminal to connection 3JP of component 337.
Run command AC039.
If the voltmeter shows the battery voltage (4 ON-OFF cycles of 10 seconds), replace the relay.
If the high-speed fan assembly relays are fed using command AC153, but there is still a fan activation fault, check
using the wiring diagram:
The conformity of the fan assembly FM15 maxi-fuse.
EDC16C36_V44_AC039/EDC16C36_V4C_AC039/EDC16C36_V48_AC039/EDC16C36_V50_AC039/EDC16C36_V54_AC039/
EDC16C36_V58_AC039EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58
13B-380V9 MR-372-J84-13B450$180.mif
13B
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58
NOTESOnly refer to these customer complaints after a complete check with the diagnostic
tool.
No dialogue with engine management computer ALP1
Starting difficult or impossibleALP2
Poor performanceALP4
Irregular engine operationALP5
External leaks from the fuel circuit ALP6
Rough idleALP7
Oil leaks from the turbocharger ALP8
Noises of the turbochargerALP9
Exhaust fumesALP10
Particle filter warning light comes on too often ALP11
DIESEL INJECTION
Fault finding – Customer complaints
13B-387
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
V9 MR-372-J84-13B450$190.mif
DIESEL INJECTION
Fault finding – Fault Finding Chart13B
ALP4
CONTINUED
is the engine running on all cylinders?
Check the operation of the injectors, run test 10 Poor injector operation.
If the fault is still present
Check the conformity of the accelerator pedal position sensor, the brake pedal sensor, the atmospheric pressure
sensor, the exhaust gas recirculation valve, and the damper valve (see Interpretation of statuses and
Interpretation of parameters).
Check the consistency of the signal for the air flowmeter, the engine coolant temperature sensor, the fuel
temperature sensor and the engine speed.
Check the connectors, the continuity, and the absence of interference resistance of the air flowmeter (apply DF056
Air flow sensor circuit), the engine coolant temperature sensor (apply DF001 Coolant temperature circuit), the
fuel temperature sensor (apply DF098 Fuel temperature sensor circuit), and the engine speed (apply DF195
Camshaft sensor - engine speed consistency).
Check:
– That the diesel filter is not clogged.
– That there are no leaks on the high and low pressure diesel circuits: run test 3 Low pressure circuit check.
– The connection of the oil vapour rebreathing circuit.
– The rail pressure regulator (MPROP) (jammed - stuck), apply the interpretation of command AC011 Rail
pressure regulator.
Check the engine timing (and the position of the high pressure pump sprocket). See the procedure in the
Workshop Repair Manual if necessary.
Test the high pressure fuel circuit:
Run the scenario SC035 High pressure fuel circuit fault finding (see Interpretation of commands).
If the fault is still present, contact the techline.
A
NO
YES
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58
13B-393
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
V9 MR-372-J84-13B450$190.mif
DIESEL INJECTION
Fault finding – Fault Finding Chart13B
ALP8 Oil leaks from the turbocharger
NOTESBefore analysing this customer complaint, check that there are no faults, and the
conformity (or otherwise) of the parameters and statuses, using the diagnostic
tool.
If the customer complaint is not eliminated, perform the following checks.
Check the area around the turbocharger
Note:
An oil leak does not correspond always to a fault of the turbocharger, the oil leak can arise from the area around
the turbocharger.
Depending on the vehicle type, the best visual access will be either from above or from below.
1. Do not start the engine.
Check the area around the turbocharger and identify the origin of the leaks.
Clean the oil traces on the turbocharger.
2. start the engine and let it warm up for several minutes.
IMPORTANT
If the air filter was previously removed, refit it before starting the engine (risk of aspirating foreign bodies into the
air inlet circuit).
Accelerate with no load several times, progressively increasing the duration before releasing the accelerator pedal.
Visually inspect the exterior condition of the fuel supply pipes and the turbocharger oil return and the area around it.
Identify the origin of the leaks.
Is an oil leak present at the air compressor inlet or outlet?
YESNO
AB
EDC16C36_V44_ALP08/EDC16C36_V4C_ALP08/EDC16C36_V48_ALP08/EDC16C36_V50_ALP08/EDC16C36_V54_ALP08/
EDC16C36_V58_ALP08EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58
13B-394
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
V9 MR-372-J84-13B450$190.mif
DIESEL INJECTION
Fault finding – Fault Finding Chart13B
ALP8
CONTINUED 1
Check the air compressor inlet or outlet
Check for a loose interface (inlet or outlet) that is the cause of
the air leak.
Note:
It is normal to find oil traces inside the pipes at the turbocharger
inlet or outlet, because the air entering the compressor was
laden with oil from the engine rebreathing circuit.
Is the suspected interface properly tightened?Tighten the interface or the pipe
concerned.
end of the procedure
Replace the pipe concerned (see MR 364 (Mégane II) or 370 (Scénic II), Mechanical systems, 12B,
turbocharging).
A
NO
YES
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58
13B-395
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
V9 MR-372-J84-13B450$190.mif
DIESEL INJECTION
Fault finding – Fault Finding Chart13B
ALP8
CONTINUED 2
Is an oil leak present only at the casing of the compressor section?
The turbocharger is not faulty. The oil leak is from another
engine component and the oil is flowing onto the turbocharger.
Is an oil leak present at the turbocharger oil supply inlet or outlet?
Check the turbocharger oil supply inlet and outlet
Check for a loose interface (inlet or outlet) that is the cause of
the oil leak.
Is the suspected interface properly tightened?Tighten the pipe concerned.
end of the procedure
Replace only the seal or the pipe of the section concerned (see
MR 364 (Megane II) or 370 (Scenic II), Mechanical, 12B,
Turbocharging).
B
YES
NO
YES
NO
C
NO
YES
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58