
13B-182
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 with the diagnostic tool.
V12 MR-372-J84-13B300$073.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF272
CONTINUED 2
CCNOTESNone.
Check the condition of the EGR valve (see Wiring Diagram Technical Note, Laguna II ph2, Vel Satis ph2,
Espace IV ph2, Mégane II ph2, Scénic II ph2, component code 1460 or 169).
Check the condition of the engine management computer connector (see Wiring Diagram Technical Note,
Laguna II ph2, Vel Satis ph2, Espace IV ph2, 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.
Measure the resistance between connections 3VP and 3VQ of component 1460 or 169.
If the resistance of the EGR valve is less than 1 Ω or greater than 400 Ω, replace the EGR valve.
After replacement, run command SC036 Reinitialise programming and select EGR valve to reinitialise the EGR
valve offsets.
Check the insulation between the following connections:
•3VP between components 120 and 1460 or 169,
•3VQ between components 120 and 1460 or 169.
If the connection or connections are faulty and if there is a repair method (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
If the fault is still present, contact the Techline.
1.DEF
NOTESSpecial notes:
This fault appears when the computer control section has
overheated.
Priorities when dealing with a number of faults:
Deal with CO, CC.O, CC.1 and CC first if they are present or
stored.
If the fault is still present, contact the Techline.
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74

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 with the diagnostic tool.
V12 MR-372-J84-13B300$073.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF297
CONTINUED
Check the particle filter is present.
If it is present:
Visually check that the particle filter is in good condition by positioning the vehicle on a lift:
– not damaged (no abnormal welds, if necessary compare it with another vehicle fitted with particle filter),
– if there are After-Sales sleeves, as a result of a previous operation, check that the particle filter's contents were
not emptied out when it was removed.
If the particle filter is not working correctly or is absent:
– replace it,
– run command SC036 Reinitialise programming and select After particle filter replacement (see
Interpretation of commands),
– switch off the ignition and wait for the diagnostic tool message (maximum time 8 minutes): Loss of dialogue
with the computer: EDC16 CP33, check the tool connection and the computer supply voltage,
– then switch on the ignition again,
– clear the faults from the computer memory (this operation must be carried out within 3 minutes of the ignition
being switched on).
If the fault is still present, contact the Techline.
EDC16CP33
Program No.: C4
Vdiag No.: 18, 1C, 20, 24,
26, 28, 54, 58, 5C, 60, 62

13B-207
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 with the diagnostic tool.
V12 MR-372-J84-13B300$074.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF323
PRESENT
OR
STOREDDAMPER VALVECC.0: Short circuit to earth
CC.1: Short circuit to + 12 V
CC: Short circuit
C0: Open circuit
1.DEF: Internal electronic fault
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault is declared present after the ignition has been switched on.
Special notes:
If the fault is present:
–the level 1 warning light is lit (for Vdiag 20, 58, 24, 5C, 26, 28, 60 and 62),
– particle filter regeneration is inhibited.
Use bornier Elé. 1681 for all operations on the engine management computer
connector.
Use the Wiring Diagram Technical Note, Laguna II ph2, Vel Satis ph2, Espace IV
ph2, Mégane II ph2, Scénic II ph2.
CC.0
CC.1
NOTESNone.
Check the condition of the damper valve connector (see Wiring Diagram Technical Note, Laguna II ph2, Vel
Satis ph2, Espace IV ph2, Mégane II ph2, Scénic II ph2, component code 1461).
Check the condition of the engine management computer connector (see Wiring Diagram Technical Note,
Laguna II ph2, Vel Satis ph2, Espace IV ph2, 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.
Measure the resistance between connections 3AAX and 3AAY of component 1461.
If the resistance of the damper valve is less than 0.5 Ω or greater than 400 Ω, replace the damper valve.
Then run command SC036: Reinitialise programming and select Damper valve to reinitialise the valve's
opening and closing stops.
EDC16CP33_V18_DF323 / EDC16CP33_V1C_DF323 / EDC16CP33_V54_DF323 / EDC16CP33_V20_DF323 / EDC16CP33_V58_DF323 /
EDC16CP33_V5C_DF323 / EDC16CP33_V24_DF323 / EDC16CP33_V04_DF323 / EDC16CP33_V08_DF323 / EDC16CP33_V44_DF323 /
EDC16CP33_V4C_DF323 / EDC16CP33_V34_DF323 / EDC16CP33_V38_DF323 / EDC16CP33_V74_DF323 / EDC16CP33_V28_DF323 /
EDC16CP33_V62_DF323 / EDC16CP33_V26_DF323 / EDC16CP33_V60_DF323
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74

13B-208
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 with the diagnostic tool.
V12 MR-372-J84-13B300$074.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF323
CONTINUED 1
Check the insulation to earth of the following connections:
•3AAX between components 120 and 1461,
•3AAY between the components 120 and 1461.
Check the insulation from + 12 V of the following connections:
•3AAX between components 120 and 1461,
•3AAY between the components 120 and 1461.
If the connection or connections are faulty and if there is a repair method (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
If the fault is still present, contact the Techline.
CC
NOTESNone.
Check the condition of the damper valve connector (see Wiring Diagram Technical Note, Laguna II ph2, Vel
Satis ph2, Espace IV ph2, Mégane II ph2, Scénic II ph2, component code 1461).
Check the condition of the engine management computer connector (see Wiring Diagram Technical Note,
Laguna II ph2, Vel Satis ph2, Espace IV ph2, 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.
Measure the resistance between connections 3AAX and 3AAY of component 1461.
If the resistance of the damper valve is less than 0.5 Ω or greater than 400 Ω, replace the damper valve.
Then run command SC036 Reinitialise programming and select Damper valve to reinitialise the valve's opening
and closing stops.
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74

13B-209
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 with the diagnostic tool.
V12 MR-372-J84-13B300$074.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF323
CONTINUED 2
Check the insulation between the following connections:
•3AAX between components 120 and 1461,
•3AAY between the components 120 and 1461.
If the connection or connections are faulty and if there is a repair method (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
If the fault is still present, contact the Techline.
CO
NOTESNone.
Check the condition of the damper valve connector (see Wiring Diagram Technical Note, Laguna II ph2, Vel
Satis ph2, Espace IV ph2, Mégane II ph2, Scénic II ph2, component code 1461).
Check the condition of the engine management computer connector (see Wiring Diagram Technical Note,
Laguna II ph2, Vel Satis ph2, Espace IV ph2, 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.
Measure the resistance between connections 3AAX and 3AAY of component 1461.
If the resistance of the damper valve is less than 0.5 Ω or greater than 400 Ω, replace the damper valve.
Then run command SC036: Reinitialise programming and select Damper valve to reinitialise the valve's
opening and closing stops.
Check the continuity of the following connections:
•3AAX between components 120 and 1461,
•3AAY between the components 120 and 1461.
If the connection or connections are faulty and if there is a repair method (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
If the fault is still present, contact the Techline.
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74

13B-222
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 with the diagnostic tool.
V12 MR-372-J84-13B300$074.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF645
CONTINUED
Check the continuity, insulation from earth and + 12 V and absence of interference resistance on the following
connections:
•3AAX between the components 120 and 1461,
•3AAY between components 120 and 1461,
•38KQ between components 120 and 1461,
•38KS between components 120 and 1461,
•38KP between components 120 and 1461.
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 that the valve is not mechanically jammed (check that the valve is clean and that no component is
preventing it from closing; clean if necessary):
With the engine switched off, disconnect the air inlet hose from the damper valve.
Check that the valve is in the open position.
Start, then switch off the engine.
Check that the valve closes when the engine is switched off and then opens again when the engine has stopped.
If this does not happen, replace the damper valve.
Then run command SC036 Reinitialise programming and select Damper valve to reinitialise the valve's opening
and closing stops.
Check if the damper valve performs 3 opening/closing cycles.
Otherwise program the damper valve using command SC036 Reinitialise programming.
If the fault is still present, contact the Techline.
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74

13B-224
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 with the diagnostic tool.
V12 MR-372-J84-13B300$074.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF646
CONTINUED 1
Measure the resistances between connections38KQ and 38KP (potentiometer supply and potentiometer
earth) and between38KS and 38KP (potentiometer signal and potentiometer earth) of component 1461.
If the resistances of the damper valve are not between 290 Ω < X < 6 kΩ, replace the damper valve.
Then run command SC036: Reinitialise programming and select Damper valve to reinitialise the valve's
opening and closing stops.
Check the insulation from + 12 V and + 5 V between the following connections:
•38KP between components 120 and 1461,
•38KQ between components 120 and 1461,
•38KS between components 120 and 1461.
If the connection or connections are faulty and if there is a repair method (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
If the fault is still present, contact the Techline.
CC.0
CO.0
NOTESNone.
Check the condition of the damper valve connector (see Wiring Diagram Technical Note, Laguna II ph2, Vel
Satis ph2, Espace IV ph2, Mégane II ph2, Scénic II ph2, component code 1461).
Check the condition of the engine management computer connector (see Wiring Diagram Technical Note,
Laguna II ph2, Vel Satis ph2, Espace IV ph2, 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.
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74

13B-225
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 with the diagnostic tool.
V12 MR-372-J84-13B300$074.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF646
CONTINUED 2
Measure the resistances between connections 38KQ and 38KP (potentiometer supply and potentiometer
earth) and between connections 38KS and 38KP (potentiometer signal and potentiometer earth) of component
1461.
If the resistances of the damper valve are not between 290 Ω < X < 6 kΩ, replace the damper valve.
Then run command SC036: Reinitialise programming and select Damper valve to reinitialise the valve's
opening and closing stops.
Check the insulation to earth of the following connection:
•38KS between components 120 and 1461.
Check the continuity of the following connections:
•38KS between components 120 and 1461,
•38KQ between components 120 and 1461.
If the connection or connections are faulty and if there is a repair method (see Technical Note 6015A, Electrical
wiring repair, Wiring: Precautions for repair), repair the wiring, otherwise replace the wiring.
If the fault is still present, contact the Techline.
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74