Page 103 of 279

17B-103
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.
V2 MR-376-X76-17B050$083.mif
PETROL INJECTION
Fault finding – Interpretation of faults17B
V42 Injection
Program No.: 2A
Vdiag No.: 18
DF633
PRESENT OR
STOREDLPG FUEL CIRCUIT OPERATING FAULT
DEF: Component in poor condition
NOTESPriorities when dealing with a combination of faults:
First deal with:
– DF398 – "Fuel system functional failure"
Conditions for application to a stored fault:
The fault is declared present with the engine running at an engine speed of 2500 rpm
for 10 seconds.
Special note:
OBD warning light comes on.
Check the value of parameter PR139 Operating richness adaptive.
If the value of PR139 < 1 then:
Check the sealing of the fuel supply system from the fuel pump to the injector rail:
– The fuel tank (see MR 388 (Logan and Sandero), MR 451 (Duster), MR 423 (Thalia 2/Symbol 2), MR 430
(Clio II F 6), Mechanical, 19C, Tank, Fuel tank: Removal - Refitting)
– The connection between the fuel pump and the fuel filter (see MR 388 (Logan and Sandero) Mechanical, 19C,
Tank, Fuel supply pipe: Removal - Refitting, MR 451 (Duster), MR 423 (Thalia 2/Symbol 2), MR 430 (Clio
II F 6), Mechanical, 19C, Tank, Fuel tank: Removal - Refitting)
– The connection between the fuel filter and the regulator (see MR 388 (Logan and Sandero), MR 451 (Duster),
MR 423 (Thalia 2/Symbol 2), MR 430 (Clio II F 6), Mechanical, 13A, Fuel supply, Fuel filter: Removal -
Refitting)
– The pressure regulator ducts (see MR 388 (Logan and Sandero), Mechanical, 19C, Tank, Fuel supply pipe:
Removal - Refitting, MR 451 (Duster), MR 423 (Thalia 2/Symbol 2), MR 430 (Clio II F 6), Mechanical, 19C,
Tank, Fuel tank: Removal - Refitting)
– The connection between the regulator and the injector rail (see MR 388 (Logan and Sandero), Mechanical,
19C, Tank, Fuel supply pipe: Removal - Refitting, MR 451 (Duster), MR 423 (Thalia 2/Symbol 2), MR 430
(Clio II F 6), Mechanical, 19C, Tank, Fuel tank: Removal - Refitting)
V42_V18_DF633
Page 105 of 279

17B-105
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.
V2 MR-376-X76-17B050$083.mif
PETROL INJECTION
Fault finding – Interpretation of faults17B
V42 Injection
Program No.: 2A
Vdiag No.: 18
DF635
PRESENT OR
STOREDLPG CYLINDER 1 COMBUSTION MISFIRE1.DEF: Polluting misfiring.
2.DEF: Destructive misfiring.
NOTESPriority when dealing with a number of faults:
– DF109 Low fuel level misfire.
Conditions for applying the fault finding procedure to stored faults:
The fault is considered present under the following conditions:
– engine running at idling speed.
Special note:
OBD warning light comes on.
1.DEF
NOTESNone.
Check the ignition coil circuit (see MR 388, Mechanical, 17A, Ignition, Ignition: Specifications),
Check the fuel supply circuit (see MR 388 (Logan and Sandero), MR 451 (Duster) or MR 423 (Thalia 2/Symbol
2), Mechanical, 13A, Fuel supply, Fuel circuit: Operating diagram),
Check the fuel supply pump circuit (see MR 388 (Logan and Sandero), MR 451 (Duster) or MR 423 (Thalia 2/
Symbol 2), Mechanical, 13A, Fuel supply, Fuel circuit: Operating diagram),
Check the condition of the cylinder 1 injector (see MR 388 (Logan and Sandero), Mechanical, 13A, Fuel supply,
Injector rail - Injectors: Removal - Refitting, MR 451 (Duster) or MR 423 (Thalia 2/Symbol 2), Mechanical, 17B,
Petrol injection, Injector rail - Injectors: Removal - Refitting),
Check the compression of cylinder 1.
V42_V18_DF635
Page 106 of 279

17B-106
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.
V2 MR-376-X76-17B050$083.mif
PETROL INJECTION
Fault finding – Interpretation of faults17B
V42 Injection
Program No.: 2A
Vdiag No.: 18
DF635
CONTINUED 1
After repair, check that the catalytic converter was not damaged by the misfire.
To do this, switch on the ignition, run the catalytic converter test SC006 Run OBD test: Catalytic converter and
start the engine (only depress the brake pedal to authorise the starting of the engine,
do not touch the accelerator pedal or clutch pedal).
At the end, check the test results:
STATUS1: Fault finding was not performed/impossible to obtain the necessary conditions
STATUS2: The component is in an average condition - sensor OK
STATUS3: The component is in good condition - sensor OK
STATUS4: The component is in poor condition - replace the catalytic converter (see MR 388 (Logan and Sandero),
MR 451 (Duster) or MR 423 (Thalia 2/Symbol 2), Mechanical, 19B, Exhaust, Catalytic converter: Removal -
Refitting).
Page 107 of 279

17B-107
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.
V2 MR-376-X76-17B050$083.mif
PETROL INJECTION
Fault finding – Interpretation of faults17B
V42 Injection
Program No.: 2A
Vdiag No.: 18
DF635
CONTINUED 2
2.DEFNOTESNone.
Check the ignition coil circuit (see MR 388, Mechanical, 17A, Ignition, Ignition: Specifications),
Check the fuel supply circuit (see MR 388 (Logan and Sandero), MR 451 (Duster) or MR 423 (Thalia 2/Symbol
2), Mechanical, 13A, Fuel supply, Fuel circuit: Operating diagram),
Check the fuel supply pump circuit (see MR 388 (Logan and Sandero), MR 451 (Duster) or MR 423 (Thalia 2/
Symbol 2), Mechanical, 13A, Fuel supply, Fuel circuit: Operating diagram),
Check the condition of the cylinder 1 injector (see MR 388 (Logan and Sandero), Mechanical, 13A, Fuel supply,
Injector rail - Injectors: Removal - Refitting, MR 451 (Duster) or MR 423 (Thalia 2/Symbol 2), Mechanical, 17B,
Petrol injection, Injector rail - Injectors: Removal - Refitting),
Check the compression of cylinder 1.
Page 108 of 279

17B-108
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.
V2 MR-376-X76-17B050$083.mif
PETROL INJECTION
Fault finding – Interpretation of faults17B
V42 Injection
Program No.: 2A
Vdiag No.: 18
DF636
PRESENT OR
STOREDLPG CYLINDER 2 COMBUSTION MISFIRE1.DEF: Polluting misfiring.
2.DEF: Destructive misfiring.
NOTESPriority when dealing with a number of faults:
– DF109 Low fuel level misfire.
Conditions for applying the fault finding procedure to stored faults:
The fault is considered present under the following conditions:
– engine running at idling speed.
Special note:
OBD warning light comes on.
1.DEF
NOTESNone.
Check the ignition coil circuit (see MR 388, Mechanical, 17A, Ignition, Ignition: Specifications),
Check the fuel supply circuit (see MR 388 (Logan and Sandero), MR 451 (Duster) or MR 423 (Thalia 2/Symbol
2), Mechanical, 13A, Fuel supply, Fuel circuit: Operating diagram),
Check the fuel supply pump circuit (see MR 388 (Logan and Sandero), MR 451 (Duster) or MR 423 (Thalia 2/
Symbol 2), Mechanical, 13A, Fuel supply, Fuel circuit: Operating diagram),
Check the condition of the cylinder 2 injector (see MR 388 (Logan and Sandero), Mechanical, 13A, Fuel supply,
Injector rail - Injectors: Removal - Refitting, MR 451 (Duster) or MR 423 (Thalia 2/Symbol 2), Mechanical,
17B, Petrol injection, Injector rail - Injectors: Removal - Refitting),
Check the compression of cylinder 2.
V42_V18_DF636
Page 109 of 279

17B-109
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.
V2 MR-376-X76-17B050$083.mif
PETROL INJECTION
Fault finding – Interpretation of faults17B
V42 Injection
Program No.: 2A
Vdiag No.: 18
DF636
CONTINUED 1
After repair, check that the catalytic converter is not damaged by the misfire.
To do this, switch on the ignition, run the catalytic converter test SC006 Run OBD test: Catalytic converter and
start the engine (only depress the brake pedal to authorise the starting of the engine,
do not touch the accelerator pedal or clutch pedal).
At the end, check the test results:
STATUS1: Fault finding was not performed/impossible to obtain the necessary conditions
STATUS2: The component is in an average condition - sensor OK
STATUS3: The component is in a good condition - sensor OK
STATUS4: The component is in poor condition - replace the catalytic converter (see MR 388 (Logan and
Sandero), MR 451 (Duster) or MR 423 (Thalia 2/Symbol 2), Mechanical, 19B, Exhaust, Catalytic converter:
Removal - Refitting).
Page 110 of 279

17B-110
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.
V2 MR-376-X76-17B050$083.mif
PETROL INJECTION
Fault finding – Interpretation of faults17B
V42 Injection
Program No.: 2A
Vdiag No.: 18
DF636
CONTINUED 2
2.DEFNOTESNone.
Check the ignition coil circuit (see MR 388, Mechanical, 17A, Ignition, Ignition: Specifications),
Check the fuel supply circuit (see MR 388 (Logan and Sandero), MR 451 (Duster) or MR 423 (Thalia 2/Symbol
2), Mechanical, 13A, Fuel supply, Fuel circuit: Operating diagram),
Check the fuel supply pump circuit (see MR 388 (Logan and Sandero), MR 451 (Duster) or MR 423 (Thalia 2/
Symbol 2), Mechanical, 13A, Fuel supply, Fuel circuit: Operating diagram),
Check the condition of the cylinder 2 injector (see MR 388 (Logan and Sandero), Mechanical, 13A, Fuel supply,
Injector rail - Injectors: Removal - Refitting, MR 451 (Duster) or MR 423 (Thalia 2/Symbol 2), Mechanical,
17B, Petrol injection, Injector rail - Injectors: Removal - Refitting),
Check the compression of cylinder 2.
Page 111 of 279

17B-111
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.
V2 MR-376-X76-17B050$083.mif
PETROL INJECTION
Fault finding – Interpretation of faults17B
V42 Injection
Program No.: 2A
Vdiag No.: 18
DF637
PRESENT OR
STOREDLPG CYLINDER 3 COMBUSTION MISFIRE1.DEF: Polluting misfiring.
2.DEF: Destructive misfiring.
NOTESPriority when dealing with a number of faults:
– DF109 Low fuel level misfire.
Conditions for applying the fault finding procedure to stored faults:
The fault is considered present under the following conditions:
– engine running at idling speed.
Special note:
OBD warning light comes on.
1.DEF
NOTESNone.
Check the ignition coil circuit (see MR 388, Mechanical, 17A, Ignition, Ignition: Specifications),
Check the fuel supply circuit (see MR 388 (Logan and Sandero), MR 451 (Duster) or MR 423 (Thalia 2/Symbol
2), Mechanical, 13A, Fuel supply, Fuel circuit: Operating diagram),
Check the fuel supply pump circuit (see MR 388 (Logan and Sandero), MR 451 (Duster) or MR 423 (Thalia 2/
Symbol 2), Mechanical, 13A, Fuel supply, Fuel circuit: Operating diagram),
Check the condition of the cylinder 3 injector (see MR 388 (Logan and Sandero), Mechanical, 13A, Fuel supply,
Injector rail - Injectors: Removal - Refitting, MR 451 (Duster) or MR 423 (Thalia 2/Symbol 2), Mechanical,
17B, Petrol injection, Injector rail - Injectors: Removal - Refitting),
Check the compression of cylinder 3.
V42_V18_DF637