rail pressure RENAULT SCENIC 2012 J95 / 3.G Engine And Peripherals EDC16CP33 User Guide

13B-53
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$071.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
DF013
CONTINUED 1
Measure the sensor feed voltage on the following connections:
•3KJ of component 799,
•3LX of component 1032.
If at least one of the two voltages is greater than + 5.1 V, disconnect the sensor connectors one by one.
If, after disconnecting the air flow sensor, the voltage returns to normal,
Check the insulation against + 12 V of the following connection:
•3KJ between components 120 and 799.
If, after disconnecting the rail pressure sensor, the voltage returns to normal,
Check the insulation from + 12 V of the following connection: 3LX between components 120 and 1032.
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.
Clear the faults created by the multiple disconnections.
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 is faulty and there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
If the fault is still present, contact the Techline.

13B-54
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$071.mif
DIESEL INJECTION
Fault finding – Interpretation of faults13B
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
DF013
CONTINUED 2
2.DEFNOTESNone.
Note:
Supply no. 3 is for the following components:
– air flowmeter, component code 799,
– rail pressure sensor, component code 1032.
Measure the sensor feed voltage on the following connections:
•3KJ of component 799,
•3LX of component 1032.
If at least one of the two voltages is less than 4.9 V, disconnect the sensor connectors one by one.
If, after disconnecting the air flow sensor, the voltage returns to normal,
Check the insulation to earth of the following connection:
•3KJ between components 120 and 799.
If, after disconnecting the rail pressure sensor, the voltage returns to normal,
Check the insulation to earth of the following connection:
•3LX between components 120 and 1032.
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.
Clear the faults created by the multiple disconnections.
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 is faulty and there is a repair method (see Technical Note 6015A, Repairing electrical wiring,
Wiring: Precautions for repair), repair the connector, otherwise replace the wiring.
If the fault is still present, contact the Techline.

13B-219
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
DF569
CONTINUED 1
1.DEF
2.DEF
3.DEF
NOTESNone.
If the specification of this fault is: 2.DEF: Turbocharging pressure too low, apply test 6: Fuel circuit return
valve check.
Continue fault finding, regardless of whether or not the fuel return rail has been replaced.
For the other specifications, move on to the next step.
If the loss of power was not noted during slight acceleration and if there was a loss of engine power during each
acceleration at full load, replace the diesel fuel injector return rail and its overpressure valve (see MR364
(Mégane II ph2), MR370 (Scénic II ph2), MR 395 (Laguna II ph2), 402 (Vel Satis ph2), 405 (Espace IV ph2)
Mechanical, 13B, Diesel fuel injector return rail: Removal - Refitting).
Check the condition of the turbocharging pressure sensor connector (see Wiring Diagram Technical Note,
Laguna II ph2, Vel Satis ph2, Espace IV ph2, Mégane II ph2, Scénic II ph2, component code 1071).
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-240
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
DF895
PRESENT
OR
STOREDPRESSURE REGULATION ON RAIL1.DEF: Below minimum threshold
2.DEF: Above maximum threshold
3.DEF: Negative loop deviation
4.DEF: Positive loop deviation
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault is declared present after:
– the ignition is switched on,
– with the engine running,
– road test.
Priorities when dealing with a number of faults:
– DF898 Pressure regulator circuit on rail,
– DF897 Pressure regulator circuit on pump,
– DF896 Pressure regulation on pump.
Special notes:
DF895 depends on the pressure regulator built into the rail (DRV).
DF896 Pressure regulation on pump depends on the pressure regulator integrated
in the pump (MPROP).
The fuel pressure regulator built into the rail (DRV) and the fuel pressure regulator built
into the pump (MPROP) are never actuated at the same time.
If the fault is present:
– particle filter regeneration is inhibited,
– the engine stops and the level 2 warning light comes on: 1.DEF, 4.DEF,
–the level 1 warning light comes on: 2.DEF, 3.DEF, 4.DEF,
– engine torque limited 2.DEF, 3.DEF, 4.DEF,
– the rail pressure is regulated by a regulator built into the pump (MPROP): 2.DEF,
3.DEF, 4.DEF.
Use bornier Elé.1681 for all operations on the engine management computer.
Use the Wiring Diagram Technical Note, Laguna II ph2, Vel Satis ph2, Espace IV
ph2, Mégane II ph2, Scénic II ph2.
EDC16CP33_V18_DF895 / EDC16CP33_V1C_DF895 / EDC16CP33_V54_DF895 / EDC16CP33_V20_DF895 / EDC16CP33_V58_DF895 /
EDC16CP33_V5C_DF895 / EDC16CP33_V24_DF895 / EDC16CP33_V04_DF895 / EDC16CP33_V08_DF895 / EDC16CP33_V44_DF895 /
EDC16CP33_V4C_DF895 / EDC16CP33_V34_DF895 / EDC16CP33_V38_DF895 / EDC16CP33_V74_DF895 / EDC16CP33_V28_DF895 /
EDC16CP33_V62_DF895 / EDC16CP33_V26_DF895 / EDC16CP33_V60_DF895
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-241
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
DF895
CONTINUED 1
1.DEF
2.DEF
3.DEF
4.DEF
NOTESNone.
Check that there are no leaks on the high pressure diesel fuel circuit.
Repair if necessary.
Check the level of fuel in the tank.
In the event of a fuel gauge sensor fault, deal with this fault first.
Check the low pressure circuit using Test 3 Low pressure circuit test and check that there are no exterior air
leaks in the low pressure fuel circuit.
Test the high pressure fuel circuit:
Run scenario SC035 High pressure fuel circuit fault finding (see Interpretation of commands).
If the fault is still present, check the rail pressure regulator connections (DRV).
check the engine management computer connections.
Check the seal on the rail pressure regulator (DRV):
Disconnect the low-pressure return pipe from the rail pressure regulator (DRV). In its place, connect a transparent
pipe, with the other end leading to a container of some sort in order to collect the drained diesel fuel.
Start the engine and let the engine idle.
When the engine is started, no diesel should flow into the transparent pipe as the rail pressure regulator (DRV) is
closed so that the pressure in the hydraulic system can rise.
Diesel fuel should flow into the transparent pipe a few seconds after the engine is started, provided that the diesel
is cold (less than 15°C), as the regulation is provided by the rail pressure regulator (DRV).
If the diesel is warm (above 15°C), regulation is controlled by the pump pressure regulator (MPROP). No diesel
should flow into the pipe.
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-242
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
DF895
CONTINUED 2
If the diesel does not behave in accordance with this description, replace the rail (removing the rail pressure
regulator (DRV) is not permitted).
Note: the above description no longer applies if faults DF898 Rail pressure regulator circuit, DF897 Pump
pressure regulator circuit and DF896 Pump pressure regulation are present.
Check the condition of the pressure regulator connector on the pump (MPROP) (see Wiring Diagram Technical
Note, Laguna II ph2, Vel Satis ph2, Espace IV ph2, Mégane II ph2, Scénic II ph2, component code 1105).
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 3FB and 3HI of component 1105.
If the resistance of the pressure regulator connector on the pump is not between 2 Ω < X < 6 Ω at 20°C, contact
the Techline.
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-243
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
DF896
PRESENT
OR
STOREDPRESSURE REGULATOR ON PUMP1.DEF: Below minimum threshold
2.DEF: Above maximum threshold
3.DEF: Negative loop deviation
4.DEF: Positive loop deviation
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault is declared present after:
– the ignition is switched on.
– engine running.
Priorities when dealing with a number of faults:
– DF897 Pressure regulator circuit on pump
– DF898 Pressure regulator circuit on rail
Special notes:
If the fault is present:
– particle filter regeneration is inhibited,
– the engine stops and the level 2 warning light comes on: 1.DEF,
–the level 1 warning light comes on: 2.DEF, 3.DEF, 4.DEF,
– engine torque is limited: 2.DEF, 3.DEF, 4.DEF,
– the rail pressure is regulated by a regulator built into the rail (DRV): 2.DEF, 3.DEF,
4.DEF.
1.DEF
2.DEF
3.DEF
4.DEF
NOTESNone.
Check that there are no leaks on the high pressure diesel fuel circuit.
Repair if necessary.
Check the level of fuel in the tank.
Check the low pressure circuit using Test 3 Low pressure circuit test and check that there are no exterior air
leaks in the low pressure fuel circuit.
EDC16CP33_V18_DF896 / EDC16CP33_V1C_DF896 / EDC16CP33_V54_DF896 / EDC16CP33_V20_DF896 / EDC16CP33_V58_DF896 /
EDC16CP33_V5C_DF896 / EDC16CP33_V24_DF896 / EDC16CP33_V04_DF896 / EDC16CP33_V08_DF896 / EDC16CP33_V44_DF896 /
EDC16CP33_V4C_DF896 / EDC16CP33_V34_DF896 / EDC16CP33_V38_DF896 / EDC16CP33_V74_DF896 / EDC16CP33_V28_DF896 /
EDC16CP33_V62_DF896 / EDC16CP33_V26_DF896 / EDC16CP33_V60_DF896
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-244
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
DF896
CONTINUED
Test the high pressure fuel circuit:
Run scenario SC035 High pressure fuel circuit fault finding.
Check the condition of the pressure regulator connector on the pump (MPROP) (see Wiring Diagram Technical
Note, Laguna II ph2, Vel Satis ph2, Espace IV ph2, Mégane II ph2, Scénic II ph2, component code 1105).
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.
Check the condition of the rail pressure regulator connector (DRV) (see Wiring Diagram Technical Note, Laguna
II ph2, Vel Satis ph2, Espace IV ph2, Mégane II ph2, Scénic II ph2, component code 1198).
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.
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-249
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
DF898
PRESENT
OR
STOREDPRESSURE REGULATOR CIRCUIT ON RAILCO: Open circuit
CC.0: Short circuit to earth
CC.1: Short circuit to + 12 V
1.DEF: Internal electronic fault
NOTESConditions for applying the fault finding procedure to a stored fault:
The fault reappears after:
– the ignition is switched on,
– the regulator is controlled using command AC225 Rail pressure regulator.
Special notes:
The rail pressure regulator (DRV) is built into the high pressure rail.
The DF898 Rail pressure regulator circuit depends on the pressure regulator on the
rail (DRV).
If the fault is present:
– the quantity of fuel injected is limited and the engine speed is limited to 3000 rpm:
CO, CC.1, 1.DEF,
–the level 2 warning light will be lit,
– the engine stops immediately for CO, CC.1, 1.DEF,
– the engine stops after a few minutes for CC.0,
– the rail pressure is regulated by the pump pressure regulator (MPROP).
Use bornier Elé. 1681 for all operations on the engine management computer
connectors.
Use the Wiring Diagram Technical Note, Laguna II ph2, Vel Satis ph2, Espace IV
ph2, Mégane II ph2, Scénic II ph2.
EDC16CP33_V18_DF898 / EDC16CP33_V1C_DF898 / EDC16CP33_V54_DF898 / EDC16CP33_V20_DF898 / EDC16CP33_V58_DF898 /
EDC16CP33_V5C_DF898 / EDC16CP33_V24_DF898 / EDC16CP33_V04_DF898 / EDC16CP33_V08_DF898 / EDC16CP33_V44_DF898 /
EDC16CP33_V4C_DF898 / EDC16CP33_V34_DF898 / EDC16CP33_V38_DF898 / EDC16CP33_V74_DF898 / EDC16CP33_V28_DF898 /
EDC16CP33_V62_DF898 / EDC16CP33_V26_DF898 / EDC16CP33_V60_DF898
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-250
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
DF898
CONTINUED 1
CONOTESNone.
Check the condition of the rail pressure regulator connector (DRV) (see Wiring Diagram Technical Note, Laguna
II ph2, Vel Satis ph2, Espace IV ph2, Mégane II ph2, Scénic II ph2, component code 1198).
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 3FB and 3RG of component 1198.
If the resistance of the rail pressure regulator connector is less than 2 Ω or greater than 1 kΩ, contact the Techline.
Check the continuity of the following connection:
•3RG between components 120 and 1198.
Check the +12 V after relay supply to the rail pressure regulator (DRV) on the following connection:
•3FB of component 1198.
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