Page 122 of 269

13B-122
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
V6 MR-413-X44-13B000$120.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
DF886
PRESENT OR
STOREDPRESENCE OF WATER IN THE DIESEL FUEL
NOTESPriorities when dealing with a number of faults:
–DF057 Water in diesel fuel detector circuit,
Special notes:
If water is detected downstream of the diesel filter, the high pressure pump and
the injectors may be damaged.
The level 1 warning light is illuminated.
Use bornier Elé. 1681 for all operations on the engine management computer
connector.
See the Technical Note Wiring Diagrams for the vehicle.
If there is water present, bleed the diesel filter.
If there is a great amount of water, run the first part of Test 13: Diesel fuel conformity check (Is the fuel cloudy
or does it separate into 2 parts?)
Check the connections of the water in diesel fuel sensor, component code 414.
Check the connections of the engine management computer grey connector, component code 120.
If the connector(s) are faulty and there is a repair procedure (see Technical Note 6015A, Repairing electrical
wiring, Wiring: Precautions for repair), repair the connector(s), otherwise replace the wiring.
With the ignition on, check for +12 V on connections 3FB1 or 3FB2 (for New Twingo) or AP15 (for Kangoo 2) of
component 414.
Check for earth on connections M or 3WU (only for New Twingo) of component 120.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
DCM1.2_V48_DF886/DCM1.2_V4C_DF886/DCM1.2_V50_DF886/DCM1.2_V54_DF886/DCM1.2_V58_DF886/DCM1.2_V5C_DF886
Page 123 of 269

13B-123
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer fault memory.
Carry out a road test followed by another check with the diagnostic tool.
V6 MR-413-X44-13B000$120.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
DF886
CONTINUED
Check the continuity of the following connections:
–3WT between components 414 and 120,
–M between components 414 and 120,
–3FB1 between components 414 and 1337.
(only for New Twingo):
–3WT between components 414 and 120,
–3WU between components 414 and 120,
–3FB2 between components 414 and 238.
(only for Kangoo 2):
–3WT between components 414 and 1337,
–AP15 between components 414 and 1337,
–MH and MW between earth and component 414.
If the connection or connections are faulty and there is a repair procedure (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
If the fault is still present, replace the diesel filter.
If the fault is still present, contact the Techline
Page 193 of 269

13B-193
AFTER REPAIRDeal with any faults displayed by the diagnostic tool. Clear the computer fault
memory.
Carry out a road test followed by another check with the diagnostic tool.
V6 MR-413-X44-13B000$170.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
PR132
CONTINUED
Sensor electrical conformity
Test the air inlet circuit (from the air filter inlet to the inlet manifold tracts, run test 5 Inlet circuit check):
–air filter unit inlet not blocked and filter not clogged,
–oil vapour recirculation circuit connected correctly,
–low and high pressure air circuit sealed and not obstructed: ducts, mounting clamps present and tightened,
turbocharging pressure sensor fitted, exchanger, etc., run TEST 1 Low pressure circuit check and TEST 7
High pressure circuit sealing check
–check that the damper valve is not jammed closed.
Carry out the necessary repairs.
Check the electrical conformity of the air flowmeter:
Check the + 5 V supply of the air flowmeter on the following connection:
–3KJ of component 799.
Check the + 12 V after relay supply of the air flowmeter on the following connection:
–3FB (or 3FB3) of component 799.
Check the continuity and absence of interference resistance of the following connections:
–3DV,
–3DW, between components 120 and 799.
Flowmeter connected, vehicle ignition on and engine stopped:
Measure the voltage between connections 3DW and 3DV of component 799.
If the voltage is not between 0.3 V and 0.7 V, replace the air flowmeter, component code 799 (see MR 364 (Mégane
II), MR 370 (Scénic II), MR 385 (Modus), MR 392 (Clio III), MR 411 (New Twingo), MR 417 (Kangoo 2),
Mechanical, 12A, Fuel Mixture, Air Flowmeter: Removal - Refitting).
Page 207 of 269
13B-207V6 MR-413-X44-13B000$190.mif
13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
Some specific checks are grouped together into tests and are used as required in various fault finding charts (ALPs)
or fault interpretations.
NOTESOnly consult these tests when dealing with a fault finding chart (ALP) or when
interpreting faults.
Low pressure circuit check TEST 1
Electrical circuit check TEST 2
Injector check TEST 3
Inlet circuit check TEST 5
High pressure system check TEST 6
High pressure circuit sealing check TEST 7
Injector return flow TEST 8
Diesel filter check TEST 9
Turbocharger solenoid valve check TEST 10
Air line at the turbocharger TEST 11
Turbocharger TEST 12
Diesel fuel conformity check TEST 13
Accelerator pedal check TEST 14
DIESEL INJECTION
Fault finding – Tests
Page 208 of 269

13B-208V6 MR-413-X44-13B000$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
TEST 1 Low pressure circuit check
Check the conformity of the low pressure circuit
connections.
Are the low pressure circuit connections correct? Carry out the necessary repairs.
Check the condition of the priming bulb, and that it is
working properly.
Look for leaks at the unions.
Are there leaks from the hoses and unions? Carry out the necessary repairs.
Check that there are no air bubbles in the diesel fuel.–Bleed the low-pressure circuit.
–Place a container under the filter.
–Disconnect the return hose from the filter
and plug the filter.
–Pump using the priming bulb until there is no
air left.
–Reconnect the return hose immediately. Are air bubbles present in the low pressure circuit?
Low pressure circuit correct.
NO
YES
YES
NO
YES
NO
DCM1.2_V48_TEST1/DCM1.2_V4C_TEST1/DCM1.2_V50_TEST1/DCM1.2_V54_TEST1/DCM1.2_V58_TEST1/DCM1.2_V5C_TEST1
Page 210 of 269
13B-210V6 MR-413-X44-13B000$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
TEST 3 Injector check
Is diesel fuel present around the injectors?Locate the source of the leak and carry out
the necessary repairs.
Control the injectors using commands
AC005 Cylinder 1 injector, AC006 Cylinder 2
injector, AC007 Cylinder 3 injector
and AC008 Cylinder 4 injector.
Can you hear the valve moving when you are
1 metre away from the vehicle?Check the insulation and the continuity of
the electrical circuit.
Run test 9 Diesel filter check.
If test 9 is correct, replace the faulty injector(s)
(MR 364 (Mégane II), MR 370 (Scénic II),
MR 385 (Modus), MR 392 (Clio III), MR 411
(New Twingo), MR 417 (Kangoo 2),
Mechanical, 13B, Diesel injection, Diesel
fuel injector: Removal - Refitting).
End of TEST 3.YES
NO
NO
YES
DCM1.2_V48_TEST3/DCM1.2_V4C_TEST3/DCM1.2_V50_TEST3/DCM1.2_V54_TEST3/DCM1.2_V58_TEST3/DCM1.2_V5C_TEST3
Page 211 of 269
13B-211V6 MR-413-X44-13B000$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
TEST 5 Inlet circuit check
Check for air leaking in or out.
Is air leaking in or out? Carry out the necessary repairs.
Check the condition of the air filter.
Is the air filter correct?Replace the air filter (see MR 364 (Mégane II),
MR 370 (Scénic II), MR 385 (Modus), MR 392
(Clio III), MR 411 (New Twingo), MR 417
(Kangoo 2), Mechanical, 12A, Fuel mixture,
Air filter: Removal - Refitting).
Check that the inlet manifold is not obstructed
(clogged).
Is the inlet manifold blocked? Clean the inlet manifold.
Air system in good order.
YES
NO
NO
YES
YES
NO
DCM1.2_V48_TEST5/DCM1.2_V4C_TEST5/DCM1.2_V50_TEST5/DCM1.2_V54_TEST5/DCM1.2_V58_TEST5/DCM1.2_V5C_TEST5
Page 218 of 269

13B-218V6 MR-413-X44-13B000$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
TEST 9 Diesel filter check
Check the conformity of the diesel filter.
Is the diesel filter in order?Replace the air filter with an original part
(see MR 364 (Mégane II), MR 370
(Scénic II), MR 385 (Modus), MR 392
(Clio III), MR 411 (New Twingo), MR 417
(Kangoo 2), Mechanical, 13A, Fuel
mixture, Air filter: Removal - Refitting).
–Switch off the ignition and analyse the diesel fuel in the diesel filter.
–Disconnect the diesel supply and return hoses from the filter.
–Block the filter inlets and outlets straight away with appropriate plugs.
–Remove the filter from its holder and shake it firmly while holding the caps in place. Tap the edge of the filter with
a screwdriver handle to detach any contamination. Empty the contents of the filter into a glass container by lifting
a protective plug, then loosening and completely removing the bleed screw.
Are black particles present on the bottom of the container?
Pass a magnet beneath the container to collect
all the metal particles. Take the magnet away
from the container.Diesel filter in good order.
Do the particles collected using the magnet
cover a surface area greater than 1 cm
2?
Replace the entire
injection system.Diesel filter in good
order.
NO
YES
YESNO
YESNO
DCM1.2_V48_TEST9/DCM1.2_V4C_TEST9/DCM1.2_V50_TEST9/DCM1.2_V54_TEST9/DCM1.2_V58_TEST9/DCM1.2_V5C_TEST9