Page 169 of 204

13B-169
AFTER REPAIRCarry out a road test followed by a check with the diagnostic tool.
V1 MR-376-X76-13B000$150.mif
DIESEL INJECTION
Fault finding – Fault Finding Chart13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
ALP10
CONTINUED
Is status ET563 Flow capacity function
"ACTIVE"?The vehicle has entered the "Flow capacity
function" program. This function is activated
more easily when: the external temperature is
high, the fuel level in the tank is at 1/4, the
vehicle is laden and if the vehicle speed is high.
Check the condition of the computer connections
(for bent pins, signs of oxidation, silicone, etc.) and
check that the computer connectors lock correctly.Check the diesel filter.
Is it close to the replacement mileage?
Contact the Techline if the customer complaint is
still present.
Replace the diesel filter (see MR 388 (Logan/
Sandero), MR 451 (Duster), MR 423 (Thalia 2/
Symbol 2) or MR 374 (Kangoo VLL),
Mechanical, 13A, Fuel supply, Fuel filter:
Removal - Refitting).
Contact the Techline if the customer complaint is
still present.
A
YES
NO
YES
Page 170 of 204

13B-170
AFTER REPAIRCarry out a road test followed by a check with the diagnostic tool.
V1 MR-376-X76-13B000$150.mif
DIESEL INJECTION
Fault finding – Fault Finding Chart13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
ALP11 Loss of power
NOTESSpecial note:
Only address this customer complaint after a complete check with the diagnostic
tool.
See explanation for flow capacity function in system operation.
Is status ET563 Flow capacity function "ACTIVE"?
Using the diagnostic tool, check that the
injector codes (C2I) are correctly
entered on the identification screen. If not,
configure the correct injector codes using
command SC002 Enter injector codesCheck the diesel filter.
Is it close to the replacement mileage?
Replace the diesel filter (see MR 388 (Logan/Sandero),
MR 451 (Duster), MR 423 (Thalia 2/Symbol 2) or MR
374 (Kangoo VLL), Mechanical, 13A, Fuel supply, Fuel
filter: Removal - Refitting).
Check the air inlet circuit by running TEST 5 Inlet circuit check.
Is the engine oil level correct? Top up the oil level.
NOYES
NO
YES
NO
A
YES
DCM1.2_V08_ALP11
Page 186 of 204
13B-186V1 MR-376-X76-13B000$160.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
Some specific checks are grouped together into tests and are performed as required in the various fault finding
charts (ALPs) or when interpreting faults.
*Technical Note 3419: Fault finding on the turbocharger for petrol and diesel engines
NOTESOnly consult these tests when dealing with a fault finding chart (ALP) or
Interpretation of faults
Low pressure circuit checkTEST 1
Electrical circuit checkTEST 2
Injector checkTEST 3
Inlet circuit checkTEST 5
High pressure system check TEST 6
High pressure circuit sealing check TEST 7
Injector return flowTEST 8
Diesel filter checkTEST 9
Turbocharger solenoid valve checkTEST 10:
Apply TEST 4
of Technical
Note 3419
Turbocharger air chainTEST 11
TurbochargerTEST 12:
Apply TEST 7
of Technical
Note 3419*
Diesel fuel conformity check TEST 13
DIESEL INJECTION
Fault finding – Tests
Page 187 of 204
13B-187V1 MR-376-X76-13B000$160.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
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. Check if there are air bubbles in the low pressure
circuit.
Low pressure circuit correct.
NO
YES
YES
NO
YES
NO
DCM1.2_V08_TEST01
Page 189 of 204
13B-189V1 MR-376-X76-13B000$160.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
TEST 3 Injector check
Conduct a visual inspection around the injectors.
Is there diesel fuel around the injectors?Locate the source of the leak and carry out the
necessary repairs.
Control the injectors using the commands:
– AC005 Cylinder 1 injector,
– AC006 Cylinder 2 injector,
– AC007 Cylinder 3 injector,
– AC008 Cylinder 4 injector.
Can you hear the valve moving when you are 1
metre 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) (see MR 388 (Logan/Sandero) or MR
451 (Duster), MR 423 (Thalia 2/Symbol 2) or MR
374 (Kangoo VLL), Mechanical, 13B, Diesel
injection, Diesel injector: Removal - Refitting).
End of test 3.YES
NO
NO
YES
DCM1.2_V08_TEST03
Page 190 of 204
13B-190V1 MR-376-X76-13B000$160.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
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.
Air filter in order?Replace the air filter (see MR 388 (Logan/
Sandero), MR 423 (Thalia 2/Symbol 2), MR
451 (Duster) or MR 374 (Kangoo VLL),
Mechanical, 12A, Fuel mixture, Air filter:
Removal - Refitting).
Check that the inlet manifold is not obstructed
(clogged).
Is the inlet manifold obstructed?Clean the inlet manifold.
Air system in good order.
YES
NO
NO
YES
YES
NO
DCM1.2_V08_TEST05
Page 192 of 204

13B-192V1 MR-376-X76-13B000$160.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
IMV = fuel flow actuator
TEST 6
CONTINUED
– Switch off the ignition, reconnect the electrical
connections to the four injectors and the low-pressure
actuator.
– Switch on the ignition again, and clear the injection
faults using the diagnostic tool.
– Check if there is no fuel leak in the high pressure
circuit. Run TEST 7 High pressure circuit sealing
check
– Check the conformity of the diesel filter. Run TEST 9
Diesel fuel filter check.
– Carry out fault finding on the injectors by checking the
return flow volume of the four injectors, run TEST 8
Injector return flow.
Is TEST 8 OK?The pump can supply the operating pressure.
Switch off the ignition, reconnect the electrical
connections
to the four injectors and the low pressure
actuator. Switch on the ignition again, and clear
the injection faults using the diagnostic tool.
– Check that there is no fuel leak in the high
pressure circuit, apply TEST 7 High pressure
circuit sealing check.
– Carry out fault finding on the injectors by
checking the return flow volume of the four
injectors, run TEST 8 Injector return flow.
If TEST 8 is correct, the high pressure fuel circuit
is correct.
Replace the faulty injector(s) (see MR
388 (Logan/Sandero), MR 451
(Duster), MR 423 (Thalia 2/Symbol 2)
or MR 374 (Kangoo VLL), Mechanical,
13B, Diesel injection, Diesel injector:
Removal - Refitting).Replace the high pressure pump (see MR 388 (Logan/Sandero),
MR 451 (Duster), MR 423 (Thalia 2/Symbol 2) or MR 374
(Kangoo VLL), Mechanical, 13B, Diesel injection, High
pressure pump: Removal - Refitting).
AB
YESNO
Page 199 of 204

13B-199V1 MR-376-X76-13B000$160.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
TEST 9 Diesel filter check
Check the conformity of the diesel filter.
Is the diesel filter in order?Replace the filter with an original
part (see MR 388 (Logan/Sandero),
MR 451 (Duster), MR 423 (Thalia 2/
Symbol 2) or MR 374 (Kangoo VLL),
Mechanical, 13A, Fuel supply, Fuel
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 support and shake it well keeping the plugs in place and empty the contents of the
filter into a glass container by lifting up a protective plug and undoing the bleed screw.
Check whether there are black particles present at 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_V08_TEST09