Page 148 of 204
13B-148V1 MR-376-X76-13B000$140.mif
13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
NOTESOnly consult this customer complaint after a complete check with the diagnostic
tool.
No dialogue with the computerALP1
Starting fault:
The engine will not start ALP2
The engine starts with difficulty, or starts then stalls ALP3
Starting difficult with Warm engine ALP4
Rough idling speed (pumping)ALP5
Idling speed too high or too lowALP6
DIESEL INJECTION
Fault finding – Customer complaints
Page 149 of 204
13B-149V1 MR-376-X76-13B000$140.mif
DIESEL INJECTION
Fault finding – Customer complaints13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
Behaviour while driving:
Erratic acceleration/deceleration and engine racing ALP7
Acceleration gapALP8
Engine cut-out (stalling)ALP9
Engine buckingALP10
Loss of powerALP11
Too much powerALP 12
Excessive consumptionALP 13
Overspeed when releasing accelerator or changing gearALP 14
Engine dies on pulling awayALP 15
Noise, odours, or smoke:
Engine rattling, noisy engine, turbocharger noise ALP 16
Blue, white or black smoke ALP 17
Smoke (blue, white or black) on accelerationALP 18
Page 150 of 204

13B-150
AFTER REPAIRCarry out a road test followed by a check with the diagnostic tool.
V1 MR-376-X76-13B000$150.mif
13B
DCM 1.2 Injection
Program no.: 4C
Vdiag No.: 08
ALP1 No dialogue with the computer
NOTESOnly consult this customer complaint after a complete check with the diagnostic
tool.
Try to establish dialogue with a computer on another vehicle to check that the diagnostic tool is not faulty. If the
tool is not at fault, and dialogue cannot be established with any other computer on the same vehicle, the cause
could be a faulty computer interfering on the multiplex network. Check the battery voltage and make the necessary
adjustments to obtain a correct voltage (9.5 V < Battery voltage < 17.5 V).
Carry out fault finding on the multiplex network using the diagnostic tool (see88B, Multiplexing).
Check the presence and the condition of the injection fuses in the engine fuse box.
Check the connection of the injection computer connectors, component code 120 and the condition of its
connections.
Check the injection computer earths (quality, oxidation, tightness of earth bolts on the battery terminal).
Check that the supply to the computer is correct:
●NH or N between the earth and component 120.
●AP29 or AP15 between components 1016 or 260 and 120.
If the connection or connections are faulty and if there is a repair procedure (see Technical Note 6015A (Renault)
or Technical Note 9804A (Dacia), Electrical wiring repair, Wiring: Precautions for repair), repair the wiring,
otherwise replace it.
A
DCM1.2_V08_ALP01
DIESEL INJECTION
Fault finding – Fault Finding Chart
Page 152 of 204

13B-152
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
ALP2 The engine will not start
NOTESOnly address this customer complaint after a complete check with the diagnostic
tool.
Check that the fuel tank is correctly filled and that the appropriate fuel is used.
Apply test 13 Diesel fuel conformity check.
Check the levels of engine oil and coolant.
Check the air inlet circuit by running TEST 5 Inlet circuit check.
Is the catalytic converter clogged or damaged?Replace the catalytic converter
(see MR 388 (Logan/Sandero),
MR 451 (Duster), MR 423 (Thalia
2/Symbol 2) or MR 374 (Kangoo
VLL), Mechanical, 19B, Exhaust,
Catalytic converter: Removal -
Refitting).
Check the electrical circuit by running TEST 2 Electrical circuit check.
Check the electrical conformity of the heater plugs (the resistance of the heater plug must be less than 2 ).
YES
NO
A
DCM1.2_V08_ALP02
Page 153 of 204
13B-153
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
ALP2
CONTINUED 1
Is the timing set correctly? Carry out the necessary repairs.
Visually check the condition of the engine wiring harness.
Does the starter motor operate correctly (minimum engine
speed = 200 rpm)?Carry out the necessary repairs.
Is the compression in order? Carry out the necessary repairs.
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 codes
Is PR038 Rail pressure less than 50 bar under + after
ignition feed?Apply the fault finding procedure for
DF007 Rail pressure sensor
circuit.
A
NO
YES
NO
YES
NO
YES
NO
B
YES
Page 155 of 204

13B-155
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
ALP3 The engine starts with difficulty, or starts then stalls
NOTESOnly address this customer complaint after a complete check with the diagnostic
tool.
Check that the fuel tank is correctly filled and that the appropriate fuel is used.
Apply test 13 Diesel fuel conformity check.
Check the levels of engine oil and coolant.
Check the air inlet circuit by running TEST 5 Inlet circuit check.
Is the catalytic converter clogged or damaged?Replace the catalytic converter (see MR
388 (Logan/Sandero), MR 451 (Duster),
MR 423 (Thalia 2/Symbol 2) or MR 374
(Kangoo VLL), Mechanical, 19B, Exhaust,
Catalytic converter: Removal - Refitting).
Check the electrical conformity of the heater plugs (the resistance of the heater plug must be less than 2 ).
YES
NO
A
DCM1.2_V08_ALP03
Page 156 of 204
13B-156
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
ALP3
CONTINUED 1
Is the timing set correctly? Carry out the necessary repairs.
Is the compression in order? Carry out the necessary repairs.
Visually check the condition of the engine wiring harness.
Check the electrical circuit by running TEST 2 Electrical circuit check.
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 codes
A
NO
YES
NO
YES
B
Page 158 of 204

13B-158
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
ALP4 Starting difficult with warm engine
NOTESOnly address this customer complaint after a complete check with the diagnostic
tool.
Check that the tank has been filled correctly.
Check the air inlet circuit by running TEST 5 Inlet circuit check.
Is the compression in order? Carry out the necessary repairs.
Is the catalytic converter clogged or damaged?Replace the catalytic converter (see
MR 388 (Logan/Sandero), MR 451
(Duster), MR 423 (Thalia 2/Symbol 2) or
MR 374 (Kangoo VLL), Mechanical,
19B, Exhaust, Catalytic converter:
Removal - Refitting).
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 codes
Visually check the condition of the engine wiring harness.
Check the low pressure circuit by running TEST 1 Low pressure circuit check.
NO
YES
YES
NO
A
DCM1.2_V08_ALP04