2012 RENAULT SCENIC ignition

13B-457V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
AC226PUMP PRESSURE REGULATOR
NOTESPerform this fault finding procedure:
– following interpretation of an unresolved fault
– following an inconsistency recorded in the parameters,
– following a customer complaint (starting problems, engine speed instability, injection
noise).
STEP 1
Check the continuity and absence of interference resistance on the following connection:
•3HI between the components 120 and 1105.
Check the + 12 V after relay supply to the pump pressure regulator (MPROP) of the following connection:
•3FB of component 1105.
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.
Run command AC226, if you can hear a slight whistling noise and rattling from the pressure regulator, go to step
2, otherwise, ensure that the computer output stage is functioning correctly:
Vehicle under + after ignition feed, clear the faults displayed by the diagnostic tool.
With the voltmeter in the direct current position:
With the pump pressure regulator connected, connect the voltmeter earth lead to connection3HI of
component1105 and the positive lead to connection3FB of component1105. Run command AC226, the
voltmeter must display four successive voltages between 2 V and 2.4 V.
If the measurement is not correct, contact the Techline.
STEP 2
EDC16CP33_V18_AC226 / EDC16CP33_V1C_AC226 / EDC16CP33_V54_AC226 / EDC16CP33_V20_AC226 / EDC16CP33_V58_AC226 /
EDC16CP33_V5C_AC226 / EDC16CP33_V24_AC226 / EDC16CP33_V04_AC226 / EDC16CP33_V08_AC226 / EDC16CP33_V44_AC226 /
EDC16CP33_V4C_AC226 / EDC16CP33_V34_AC226 / EDC16CP33_V38_AC226 / EDC16CP33_V74_AC226 / EDC16CP33_V28_AC226 /
EDC16CP33_V62_AC226 / EDC16CP33_V26_AC226 / EDC16CP33_V60_AC226
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.

13B-468V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
VP036INHIBIT FUEL SUPPLY
NOTESThis command enables you to disable the supply to the injectors.
This command is carried out with the engine switched off, and ignition on.
This command allows the injectors to be locked, so that starting is not possible.
Command VP036 allows the engine compressions to be checked in complete safety without disconnecting the
connectors of the injectors or the TDC sensor.
Procedure to follow (cylinder no. 1 is located on the timing end):
– Remove all of the heater plugs, connect the compression gauge with the M9R flexible end piece, part no.
MOT 1772, to a cylinder.
– Position the gear lever in neutral (manual gearbox) or to position P (automatic/sequential gearbox).
– Depress the brake pedal and keep it in this position throughout the test.
– Activate command VP036.
– Attempt to start the vehicle (within 10 seconds of activating command VP036).
If the vehicle does not start, check the cylinder compressions.
Start the procedure again on another cylinder.
WARNING:
Keep the brake pedal depressed for the length of the test.
This command is inhibited automatically after 10 seconds.
EDC16CP33_V18_VP036 / EDC16CP33_V1C_VP036 / EDC16CP33_V54_VP036 / EDC16CP33_V20_VP036 / EDC16CP33_V58_VP036 /
EDC16CP33_V5C_VP036 / EDC16CP33_V24_VP036 / EDC16CP33_V04_VP036 / EDC16CP33_V08_VP036 / EDC16CP33_V44_VP036 /
EDC16CP33_V4C_VP036 / EDC16CP33_V34_VP036 / EDC16CP33_V38_VP036 / EDC16CP33_V74_VP036 / EDC16CP33_V28_VP036 /
EDC16CP33_V62_VP036 / EDC16CP33_V26_VP036 / EDC16CP33_V60_VP036
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.

13B-470
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V12 MR-372-J84-13B300$170.mif
13B
ALP1 No dialogue with engine management computer
Use the Wiring Diagram Technical Note, Laguna II ph2, Vel Satis ph2, Espace IV ph2, Mégane II ph2,
Scénic II ph2.
STEP 1
Check the conformity of the vehicle type, and the domain selected on the tool.
Check that the tool is not faulty by trying to establish dialogue with a computer on another vehicle.
Check the supply to the diagnostic socket, component code 225, of the following connections:
•BCP4 of component 225 (+ before ignition),
•AP10 of component 225 (+ after ignition),
•NAP and MA of component 225 (earth).
Check the conformity of the after ignition fuse.
– The conformity of the injection relay mounting.
Check the conformity of the main relay (relay removed):
–Insulation between connections 3FB and BP37 of component 983 or 1337.
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.
– Measure the resistance between connections 3AA and BP37 of component 983 or 1337.
If the resistance of the injection relay is not between: 60 Ω < X < 70 Ω, replace the relay.
Disconnect the engine management computer and check that there are no conducting parts on the computer
studs. If this reveals any kind of impurity, rectify it and try to establish dialogue.
If the fault is still present, place the bornier Elé. 1681 on the engine harness:
Check the continuity and absence of interference resistance on the following multiplex connections:
•133B between components 120 and 225,
•133C between components 120 and 225.
Check the +12 V after relay supply to the engine management computer on the following connections:
•3FB of component 120,
•3FB1 of component 120,
•3FB2 of component 120.
Check for complete earthing on connections NT of component 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.
EDC16CP33_V18_ALP01 / EDC16CP33_V1C_ALP01 / EDC16CP33_V54_ALP01 / EDC16CP33_V20_ALP01 / EDC16CP33_V58_ALP01 /
EDC16CP33_V5C_ALP01 / EDC16CP33_V24_ALP01 / EDC16CP33_V04_ALP01 / EDC16CP33_V08_ALP01 / EDC16CP33_V44_ALP01 /
EDC16CP33_V4C_ALP01 / EDC16CP33_V34_ALP01 / EDC16CP33_V38_ALP01 / EDC16CP33_V74_ALP01 / EDC16CP33_V28_ALP01 /
EDC16CP33_V62_ALP01 / EDC16CP33_V26_ALP01 / EDC16CP33_V60_ALP01
DIESEL INJECTION
Fault finding – Fault Finding Chart
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-473
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V12 MR-372-J84-13B300$170.mif
DIESEL INJECTION
Fault finding – Fault Finding Chart13B
ALP2
CONTINUED 1
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 conformity of the engine earths (oxidation, tightness, etc.).
Check the mounting and condition (overheating) of the sensor.
Check the synchronisation of the camshaft sensors and the engine speed sensors with the display of ET238
Synchronisation. If synchronisation is not active, refer to the checks described in DF195 Camshaft/engine
speed sensor consistency.
Test the high pressure fuel circuit:
Run scenario SC035 High pressure fuel circuit fault finding.
To interpret the result, apply the interpretation of command SC035 (see Interpretation of commands).
Check the fuel circuit sealing: run Test 3 Low pressure circuit check.
If Test 3 is correct.
If Test 3 is not correct, proceed as follows:
Check the conformity of the type of heater plugs configured:
For Vdiag 20, 24, 38 and 74: consult ET781 Heater plugs in the Ignition/Preheating subfunction and check the
conformity with the type of plugs installed:
– Slow plugs have a black ring.
– Fast plugs have a white ring.
If the heater plugs are being replaced with plugs of a different type (see Replacement of components, Replacing
heater plugs).
For all Vdiags, check that all 4 plugs have the same colour ring.
Check that the heater plugs are actuated using the AC037 Preheating relay command.
Check the sealing and condition of the inlet circuit: run Test 4 Turbocharged air inlet circuit check, and follow
the related fault finding procedure (see Test 4).
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74