Page 338 of 510

13B-338
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V12 MR-372-J84-13B300$121.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
PR022EGR VALVE POSITION FEEDBACK LOOP DIFFERENCE
PARAMETER
DEFINITIONThis parameter indicates the percentage difference between the setpoint and the EGR
valve position.
NOTESSpecial notes:
Only perform these tests if the parameters do not correspond with the system
operation programming.
Conformity check: Engine stopped and ignition on
This parameter indicates the percentage difference between the setpoint and the EGR valve position.
In the event of a fault, consult the interpretation of faults DF209 EGR valve position sensor circuit and DF647
EGR valve position regulation.
Conformity check with the engine running and engine coolant temperature > 80°C
The PR022 value must be between:
- 5% < PR022 < + 5%.
In the event of a fault, refer to the interpretation of faults DF209 and DF647.
EDC16CP33_V18_PR022 / EDC16CP33_V1C_PR022 / EDC16CP33_V54_PR022 / EDC16CP33_V20_PR022 / EDC16CP33_V58_PR022 /
EDC16CP33_V5C_PR022 / EDC16CP33_V24_PR022 / EDC16CP33_V04_PR022 / EDC16CP33_V08_PR022 / EDC16CP33_V44_PR022 /
EDC16CP33_V4C_PR022 / EDC16CP33_V34_PR022 / EDC16CP33_V38_PR022 / EDC16CP33_V74_PR022 / EDC16CP33_V28_PR022 /
EDC16CP33_V62_PR022 / EDC16CP33_V26_PR022 / EDC16CP33_V60_PR022
EDC16CP33
Program No.: C4
VDiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
Page 350 of 510

13B-350
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V12 MR-372-J84-13B300$121.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
PR051EGR VALVE POSITION FEEDBACK
PARAMETER
DEFINITIONThis parameter indicates the opening ratio of the EGR valve in %.
NOTESThere must be no present or stored faults.
Perform this fault finding procedure:
– after finding an inconsistency in the parameter,
– after a customer complaint (loss of power, smoke etc.).
– after interpretation of command AC103 EGR by-pass.
Use the Technical Note Wiring Diagram, Laguna II ph2, Vel Satis ph2, Mégane ll
ph2, Scénic ll ph2, Espace IV ph2.
Conformity check: Engine stopped and ignition on, or engine running, and engine coolant
temperature > 80°C
In the event of a fault, see the interpretation of faults DF209 EGR valve position sensor circuit and DF647 EGR
valve position regulation.
Sensor electrical conformity
Check the continuity and absence of interference resistance of the following connections:
•3JM between components 120 and 1460 or 169,
•3EL between components 120 and 1460 or 169,
•3GC between components 120 and 1460 or 169.
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.
EDC16CP33_V18_PR051 / EDC16CP33_V1C_PR051 / EDC16CP33_V54_PR051 / EDC16CP33_V20_PR051 / EDC16CP33_V58_PR051 /
EDC16CP33_V5C_PR051 / EDC16CP33_V24_PR051 / EDC16CP33_V04_PR051 / EDC16CP33_V08_PR051 / EDC16CP33_V44_PR051 /
EDC16CP33_V4C_PR051 / EDC16CP33_V34_PR051 / EDC16CP33_V38_PR051 / EDC16CP33_V74_PR051 / EDC16CP33_V28_PR051 /
EDC16CP33_V62_PR051 / EDC16CP33_V26_PR051 / EDC16CP33_V60_PR051
EDC16CP33
Program No.: C4
VDiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
Page 371 of 510

13B-371
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V12 MR-372-J84-13B300$121.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
PR128FIRST EGR VALVE OFFSET
PARAMETER
DEFINITIONThis parameter indicates the closing ratio of the EGR valve for the first offset of
the EGR valve.
NOTESNone.
Conformity check with engine stopped and ignition on, or engine running, and engine coolant
temperature > 80°C
The EGR valve closure value during the first EGR valve offset must be between:
15% < PR128 < 25%.
PR128 ≈ PR129 Last EGR valve offset, these 2 values should be similar.
In the event of a fault, see the interpretation of faults DF209 EGR valve position sensor circuit and DF647 EGR
valve position regulation.
EDC16CP33_V18_PR128 / EDC16CP33_V1C_PR128 / EDC16CP33_V54_PR128 / EDC16CP33_V20_PR128 / EDC16CP33_V58_PR128 /
EDC16CP33_V5C_PR128 / EDC16CP33_V24_PR128 / EDC16CP33_V04_PR128 / EDC16CP33_V08_PR128 / EDC16CP33_V44_PR128 /
EDC16CP33_V4C_PR128 / EDC16CP33_V34_PR128 / EDC16CP33_V38_PR128 / EDC16CP33_V74_PR128 / EDC16CP33_V28_PR128 /
EDC16CP33_V62_PR128 / EDC16CP33_V26_PR128 / EDC16CP33_V60_PR128
EDC16CP33
Program No.: C4
VDiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
Page 372 of 510

13B-372
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V12 MR-372-J84-13B300$121.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
PR129LAST EGR VALVE OFFSET
PARAMETER
DEFINITIONThis parameter indicates the closing ratio of the EGR valve for the first EGR valve offset.
NOTESNone.
Conformity check with engine stopped and ignition on, or engine running, and engine coolant
temperature > 80°C
The EGR valve closure value during the last EGR valve offset must be between:
15% < PR129 < 25%.
PR128 First EGR valve offset ≈ PR129, these 2 values should be similar.
In the event of a fault, consult the interpretation of faults DF209 EGR valve position sensor circuit and DF647
EGR valve position regulation.
EDC16CP33_V18_PR129 / EDC16CP33_V1C_PR129 / EDC16CP33_V54_PR129 / EDC16CP33_V20_PR129 / EDC16CP33_V58_PR129 /
EDC16CP33_V5C_PR129 / EDC16CP33_V24_PR129 / EDC16CP33_V04_PR129 / EDC16CP33_V08_PR129 / EDC16CP33_V44_PR129 /
EDC16CP33_V4C_PR129 / EDC16CP33_V34_PR129 / EDC16CP33_V38_PR129 / EDC16CP33_V74_PR129 / EDC16CP33_V28_PR129 /
EDC16CP33_V62_PR129 / EDC16CP33_V26_PR129 / EDC16CP33_V60_PR129
EDC16CP33
Program No.: C4
VDiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74