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 200 of 204

13B-200V1 MR-376-X76-13B000$160.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
TEST 11 Turbocharger air chain
Check for the air filter
Check the replacement interval of the air filter on the maintenance booklet.
Compare the part numbers of the air filter fitted to the vehicle and that of the air filter recommended by the
manufacturer.
Check the air filter direction of fitting.
Is the air filter fitted to the vehicle correct?
Check the condition of the air filter
Visually inspect the condition of the filtering section of the
air filter.
Is either the air filter or its seal damaged?
Is the air filter fouled (does it contain a lot of
impurities)?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).
Low pressure circuit check
Note:
Depending on the vehicle type, the best visual access will
be either from above or from below.
Visually inspect the condition of the following
components:
– fresh air inlet scoop on the front panel of the vehicle,
– air inlet pipe to the air filter,
– air pipe of the filter until the compressor inlet,
– mountings of the air flowmeter.
Is one of these components incorrect (disconnected,
cut, bent, pierced or kinked pipes)?Replace the faulty parts (see MR
388 (Logan/Sandero), MR 451
(Duster), MR 423 (Thalia 2/
Symbol 2) or MR 374 (Kangoo
VLL), Mechanical, 12B,
Turbocharging).
YESNO
YES
NO
YES
A
NO
DCM1.2_V08_TEST11
Page 202 of 204

13B-202V1 MR-376-X76-13B000$160.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
TEST 13 Diesel fuel conformity check
WARNING
During this operation, it is essential to:
– refrain from smoking or bringing incandescent objects close to the work area,
– guard against petrol splashes caused by the residual pressure in the pipes,
– wear safety goggles with side guards,
– wear leaktight gloves (Nitrile type).
IMPORTANT
– To avoid any corrosion or damage, protect the areas on which fuel is likely to run.
– To prevent impurities from entering the circuit, place protective plugs on all fuel circuit components
exposed to the open air.
Preparations:
Weigh an empty 1300 ml plastic cup (part no. 77 11 171 413) with its cover (part no. 77 11 171 416) using
electronic scales such as those used in body paint workshops (example: PANDA part no. 77 11 224 995). Record
the weight of the empty plastic cup.
This type of plastic cup is used to prepare paint.
Remove 1 l of fuel at the diesel filter outlet (see MR 388 (Logan/Sandero), MR 451 (Duster), MR 423 (Thalia
2/Symbol 2) or MR 374 (Kangoo VLL), Mechanical, 19C, Tank, Draining the fuel tank), using a pneumatic
transfer pump (part no. 634-200) and place it in the 1300 ml plastic cup.
Cover the plastic cup with its cover and let it settle for approximately 2 minutes.
Is the fuel cloudy or does
it separate into two
parts?Presence of water in diesel fuel, the fuel is not compliant.
Drain the fuel system, including the tank (see MR 388 (Logan/
Sandero), MR 451 (Duster), MR 423 (Thalia 2/Symbol 2) or MR 374
(Kangoo VLL), Mechanical, 19C, Tank, Draining the fuel tank).
YES
A
NO
DCM1.2_V08_TEST13