Page 39 of 431
13B-39V9 MR-372-J84-13B450$090.mif
DIESEL INJECTION
Fault finding – Fault summary table13B
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58
* regener: regenerationFaultDTC code in
hexadecimalLevel 1 fault
warning light
(orange
SERVICE
warning light)Level 2 fault
warning light
(red STOP
warning light)No fault
warning
light litOBD
warning
light lit
DF890 Movement during
particle filter regener.* 297 - - X -
DF891 Group 1 injectors feed 2146 - 1.DEF/2.DEF - -
DF892 Group 2 injectors feed 2149 - 1.DEF/2.DEF - -
DF899 Regeneration
temperature threshold limit
exceeded 3031 1.DEF
DF953 Particle filter absent 2002 - - X
DF967 Richness ratio sensor
circuit130 - -CC.0/CC.1/
CO/1.DEF/
2.DEF/
3.DEF-
DF970 Richness ratio sensor
heater circuit135 - -CC.0/CC.1/
CO/1.DEF/
2.DEF/
3.DEF-
DF980 Richness ratio sensor
function2A00 - -1.DEF/
2.DEF/
3.DEF-
DF1020 Engine oil dilution 253F 1.DEF - - -
Page 197 of 431

13B-197
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
DF967
PRESENT
OR
STOREDRICHNESS RATIO SENSOR CIRCUITCC.0: Short circuit to earth
CC.1: Short-circuit on +12 volts.
CO: Open circuit
1.DEF: Abnormal voltage
2.DEF: Below minimum threshold
3.DEF: Above maximum threshold
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault is declared present after:
– the ignition is switched on,
– a road test.
Special notes:
Use the bornier Elé. 1681 for all operations on the connectors of the injection
computer.
The richness ratio sensor is only present on certain F9Q818 engines. Check that the
vehicle is correctly equipped with this sensor.
Use Wiring Diagram Technical Note, Mégane II ph2, Scénic II ph2.
Check the condition of the connector of the richness ratio sensor (see Wiring Diagram Technical Note, Mégane
II ph2, Scénic II ph2, Component code 1587).
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, insulation and absence of interference resistance on the following connections:
– Connection code 3AAS between components 1587 and 120.
– Connection code 3AAT between components 1587 and 120.
– Connection code 3AAU between components 1587 and 120.
– Connection code 3AAV between components 1587 and 120.
– Connection code 3AAW between components 1587 and 120.
Check for + 12 V on the connector of the richness ratio sensor.
– Connection code 3FB of component 1587.
If there is a repair method (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise replace it.
If the fault is still present, contact the Techline.
EDC16C36_V44_DF967/EDC16C36_V4C_DF967/EDC16C36_V48_DF967EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48
Page 236 of 431

13B-236V9 MR-372-J84-13B450$131.mif
DIESEL INJECTION
Fault finding – Interpretation of statuses13B
ET300RICHNESS REGULATION
STATUS DEFINITIONACTIVE: This indicates that the richness is regulated.
INACTIVE: This status indicates that the richness is not regulated.
NOTESSpecial notes:
This status only concerns certain F9Q818 engines. Check that the vehicle is definitely
equipped with a richness ratio sensor.
Conformity check with engine stopped and ignition on
INACTIVEThe status is INACTIVE when the engine is not running.
In the event of a fault, consult the interpretation of fault DF967 Richness ratio sensor
circuit.
Engine running, engine coolant temperature > 80°C
ACTIVEThe status is ACTIVE when the engine is running.
In the event of a fault, consult the interpretation of fault DF967 Richness ratio sensor
circuit.
EDC16C36_V44_ET300/EDC16C36_V48_ET300/EDC16C36_V4C_ET300
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16 C36
Program No.: 91
Vdiag No.: 44, 48, 4C
Page 338 of 431
13B-338V9 MR-372-J84-13B450$152.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
PR777RICHNESS RATIO SENSOR VOLTAGE
PARAMETER
DEFINITIONThis parameter indicates the richness ratio sensor voltage in volts.
NOTESSpecial notes:
This status only concerns certain F9Q818 engines. Check that the vehicle is definitely
equipped with a richness ratio sensor.
Conformity check with engine stopped and ignition on
PR777 = 0 ± 0.1 V
In the event of a fault, consult the interpretation of DF967 Richness ratio sensor circuit.
Conformity check with engine running, engine coolant temperature > 80°C
PR777=2±0.1V
In the event of a fault, consult the interpretation of DF967 Richness ratio sensor circuit.
EDC16C36_V44_PR777/EDC16C36_V48_PR777/EDC16C36_V4C_PR777
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
EDC16 C36
Program No.: 91
Vdiag No.: 44, 48, 4C