13B-176
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition until the end of the power-latch phase, and carry out a road test
followed by a check using the diagnostic tool.
V9 MR-372-J84-13B450$104.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF315
CONTINUED 1
CC.1NOTESNone.
Check the condition of the connector of the differential pressure sensor.
Check the condition of the connector of the engine management computer.
If the connector or connectors are faulty and if there is a repair procedure (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Check the insulation in relation to + 12 V on the following connections:
– connection code3TL,
– connection code3TM,
between components 120 and 1290.
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 it.
If the fault is still present, replace the differential pressure sensor.
EDC16 C36
Program No.: 91
Vdiag No.: 48, 50, 58
13B-177
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition until the end of the power-latch phase, and carry out a road test
followed by a check using the diagnostic tool.
V9 MR-372-J84-13B450$104.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF315
CONTINUED 2
CO.0
CONOTESNone.
Check the condition of the connector of the differential pressure sensor (see Wiring Diagram Technical Note,
Mégane II ph2, Scénic II ph2, Component code 1290).
Check the condition of the connector of the engine management computer (see Wiring Diagram Technical Note,
Mégane II ph2, Scénic II ph2, Component code 120).
If the connector or connectors are faulty and if there is a repair procedure (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Check the continuity and insulation to earth of the following connections:
– connection code3TL,
– connection code3TM,
between components 120 and 1290.
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 it.
If the wiring of the particle filter downstream temperature sensor, component code 1288, is present (with or without
the sensor being present), check the electrical insulation in relation to + 12 V between the following connections:
• 3XU between components 120 and 1288,
• 3TG between components 120 and 1288.
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 it.
If the fault is still present, replace the differential pressure sensor.
EDC16 C36
Program No.: 91
Vdiag No.: 48, 50, 58
13B-178
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition until the end of the power-latch phase, and carry out a road test
followed by a check using the diagnostic tool.
V9 MR-372-J84-13B450$104.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
* diff: differential
DF316
PRESENT
OR
STOREDPARTICLE FILTER DIFF* PRESSURE
1.DEF: Signal incoherent
2.DEF: Below minimum threshold
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault is declared present after:
– the ignition is switched on.
– the engine is started.
Special notes:
If the fault is present:
– the particle filter fault finding procedure is inhibited,
–the Level 1 and OBD warning lights are lit.
Use bornier Ele. 1681 for all operations on the engine management computer
connector.
Use Wiring Diagram Technical Note, Mégane II ph2, Scénic II ph2.
Check the condition of the pressure pipes on the differential pressure sensor.
Check that they are sealed and in the correct position.
Replace if necessary.
Check the condition of the connectors on the differential pressure sensor and the injection computer.
If there is a repair method (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise replace it.
Check the continuity, insulation and the absence of interference resistance on the following connections:
– Connection code3AAQ,
– Connection code3TM,
– Connection code 3TL,
between components 1290 and 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 it.
If the fault is still present, contact the Techline.
EDC16C36_V48_DF316/EDC16C36_V50_DF316/EDC16C36_V58_DF316EDC16 C36
Program No.: 91
Vdiag No.: 48, 50, 58
13B-183
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition until the end of the power-latch phase, and carry out a road test
followed by a check using the diagnostic tool.
V9 MR-372-J84-13B450$104.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF647
PRESENT
OR
STOREDEGR VALVE POSITION REGULATION1.DEF: Inconsistent EGR 1 offset
2.DEF: Offset too high: valve clogged, stuck open or abnormal
3.DEF: Inconsistent EGR 3 offset
4.DEF: Above maximum threshold
5.DEF: Valve jammed closed
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault is declared present after:
– the engine is started,
– a road test.
Special notes:
If the fault is present:
–the level 1 warning light is illuminated for 1.DEF, 3.DEF and 5.DEF,
–the European On Board Diagnostic warning light is illuminated for 2.DEF and
4.DEF,
– the EGR function and turbocharging are inhibited by the engine management
computer,
– engine torque is limited.
Use bornier Ele. 1681 for all operations on the engine management computer
connector.
If faults DF647 and DF038 Computer are displayed at the same time, deal with DF038
Computer first. Then check that the EGR valve is open during idling to make sure that
the programming has not been lost. If the valve does not open, carry out the
programming phase.
Priorities when dealing with a number of faults:
– DF209 EGR valve position sensor circuit,
– DF046 Battery voltage,
– DF012 Sensor supply voltage no. 2,
– DF272 EGR valve control circuit,
if they are present or stored.
For EGR valves with a flat connector, it is not possible to check the sensor resistance.
Use Wiring Diagram Technical Note, Mégane II ph2, Scénic II ph2.
EDC16C36_V44_DF647/EDC16C36_V4C_DF647/EDC16C36_V48_DF647/EDC16C36_V50_DF647/EDC16C36_V54_DF647/
EDC16C36_V58_DF647EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58
13B-185
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition until the end of the power-latch phase, and carry out a road test
followed by a check using the diagnostic tool.
V9 MR-372-J84-13B450$104.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF652
PRESENT
OR
STOREDTURBINE UPSTREAM TEMPERATURE SENSOR CIRCUIT
CC.O: Short circuit to earth
CO.1: Open circuit or short-circuit on +12 V.
NOTESConditions for applying fault finding procedures to stored faults:
The fault becomes present with the ignition on (CC.0) or after a road test, with the
engine warm (CO.1).
Special notes:
If the fault is present:
– particle filter regeneration is inhibited,
– the vehicle performance is reduced,
– temperature regulation before the particle filter is inhibited.
Use Wiring Diagram Technical Note, Mégane II ph2, Scénic II ph2.
CC.0
NOTESNone.
Check the condition of the turbine upstream temperature sensor connector.
Check the condition of the engine management computer connector.
If the connector or connectors are faulty and if there is a repair procedure (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Check the insulation from earth of the following connections:
– connection code 3ABS,
– connection code3ABT,
between components 120 and 1589.
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 it.
If the fault is still present, replace the turbine upstream temperature sensor.
EDC16C36_V48_DF652/EDC16C36_V50_DF652/EDC16C36_V58_DF652EDC16 C36
Program No.: 91
Vdiag No.: 48, 50, 58
13B-186
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition until the end of the power-latch phase, and carry out a road test
followed by a check using the diagnostic tool.
V9 MR-372-J84-13B450$104.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF652
CONTINUED
CO.1NOTESNone.
Check the condition of the turbine upstream temperature sensor connector.
Check the condition of the engine management computer connector.
If the connector or connectors are faulty and if there is a repair procedure (see Technical Note 6015A, Repairing
electrical wiring, Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
Check the continuity and insulationof the following connections against + 12 volts:
– connection code 3ABS,
– connection code3ABT,
between components 120 and 1589.
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 it.
If the fault is still present, replace the turbine upstream temperature sensor.
EDC16 C36
Program No.: 91
Vdiag No.: 48, 50, 58
13B-187
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition until the end of the power-latch phase, and carry out a road test
followed by a check using the diagnostic tool.
V9 MR-372-J84-13B450$104.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF778
PRESENT
OR
STOREDTURBINE UPSTREAM TEMPERATURE REGULATION
1.DEF: Positive loop deviation
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault becomes present after starting the engine.
Priorities when dealing with a number of faults:
Deal with faults DF652 Turbine upstream temperature sensor circuit and DF226
Damper valve circuit first, if they are present or stored.
Special notes:
If the fault is present:
–The level 1 warning light is illuminated.
– A loss of engine performance will be perceived.
Use Wiring Diagram Technical Note, Mégane II ph2, Scénic II ph2.
EDC16C36_V48_DF778/EDC16C36_V50_DF778/EDC16C36_V58_DF778EDC16 C36
Program No.: 91
Vdiag No.: 48, 50, 58
13B-188
AFTER REPAIRDeal with any other faults. Clear the fault memory.
Switch off the ignition until the end of the power-latch phase, and carry out a road test
followed by a check using the diagnostic tool.
V9 MR-372-J84-13B450$104.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF778
CONTINUED
Check the turbine upstream temperature sensor connections.
check the engine management computer connections.
If there is a repair method (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise replace it.
Check the continuity, absence of interference resistance and insulation from + 5 V and + 12 V of the following
connections:
– Connection code 3ABS,
– Connection code 3ABT,
between components1589 and 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 it.
Check the continuity, the absence of interference resistance, and the insulation against earth of the following
connection:
– Connection code 3ABS between components 1589 and 120.
If the connection is faulty and there is a repair procedure (see Technical Note 6015A, Electrical wiring repair,
Wiring: Precautions for repair), repair the wiring, otherwise replace it.
Check for the earth on the connector of the turbine upstream temperature sensor:
– Connection code 3ABT of component 1589.
Apply TEST 4 Turbocharged air inlet circuit check.
If the fault is still present, warm up the engine until parameter PR064 coolant temperature = 80°C.
Then run the engine at fast idle speed: PR055 engine speed = 1500 rpm for 2 minutes.
If PR667 Turbine upstream temperature remains fixed at 200°C, replace the turbine upstream temperature
sensor.
EDC16 C36
Program No.: 91
Vdiag No.: 48, 50, 58