2012 RENAULT SCENIC ABS

13B-445V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
AC037
CONTINUED
STEP 2:
Check the connections of the preheating unit, component code 257, the heater plugs, component codes 680, 681,
682 and 683 and the injection computer, component code 120.
Measure the resistance of the heater plugs. If the resistance value is > 2 Ω, replace the faulty plug or plugs,
making sure that the correct plug type, slow or fast, is fitted on the vehicle.
Check the continuity and absence of interference resistance of the following connections:
•37AB between components 257 and 683,
•37AA between components 257 and 680,
•37Z between components 257 and 681,
•37AC between components 257 and 682.
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 condition of the preheating unit supply fuse (70 A) (see MR 364 (Mégane II ph2), MR 370 (Scénic II
ph2), MR 395 (Laguna II ph2), 402 (Vel Satis ph2), 405 (Espace IV ph2) Mechanical, 81C, Fuses, Fuses: List
and location of components).
Check the + 12 V battery supply to the preheating unit on the following connection:
•BP35 of component 257.
Check the continuity and absence of interference resistance of the following connections:
•3FY between components120 and 257,
•3FF between components120 and 257.
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, replace the preheating unit.
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-450V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
AC103EGR BY-PASS
NOTESCarry out this fault finding procedure when the interpretation of fault DF304 EGR
bypass circuit has not been resolved.
Use the Wiring Diagram Technical Note, Laguna II ph2, Vel Satis ph2, Espace IV
ph2, Mégane II ph2, Scénic II ph2.
Measure the resistance between connections 3FB and 3TP of component 1301.
If the resistance of the solenoid valve is not between:
•43 Ω and 49 Ω at + 25 °C,
•32 Ω and 37 Ω at - 40 °C, replace the EGR bypass solenoid valve.
Check the continuity and the absence of interference resistance on the following connection:
•3TP between components 120 and 1301.
Check the + 12 V after relay supply to the EGR bypass solenoid valve of the following connection:
•3FB of component 1301.
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 you notice no valve movement when running command AC103, ensure that the computer output stage is
functioning:
Vehicle under + after ignition feed, clear the faults displayed by the diagnostic tool.
EDC16CP33_V18_AC103 / EDC16CP33_V1C_AC103 / EDC16CP33_V54_AC103 / EDC16CP33_V20_AC103 / EDC16CP33_V58_AC103 /
EDC16CP33_V5C_AC103 / EDC16CP33_V24_AC103 / EDC16CP33_V04_AC103 / EDC16CP33_V08_AC103 / EDC16CP33_V44_AC103 /
EDC16CP33_V4C_AC103 / EDC16CP33_V34_AC103 / EDC16CP33_V38_AC103 / EDC16CP33_V74_AC103 / EDC16CP33_V28_AC103 /
EDC16CP33_V62_AC103 / EDC16CP33_V26_AC103 / EDC16CP33_V60_AC103
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-454V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
ac195electric coolant pump
NOTESthis command allows you to check the operation of the electric coolant pump.
Check the connection and condition of the coolant pump relay connector, component code 573 and the injection
computer connector, component code 120.
If the 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 connector.
Check the insulation, continuity and the absence of interference resistance on the following connections:
•3AAZ between components 573 and 120,
•3VH between components 573 and 369,
•3FB between components 573 and 983,
•3FB1 between components 573 and 983.
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_AC195 / EDC16CP33_V1C_AC195 / EDC16CP33_V54_AC195 / EDC16CP33_V20_AC195 / EDC16CP33_V58_AC195 /
EDC16CP33_V5C_AC195 / EDC16CP33_V24_AC195 / EDC16CP33_V28_AC195 / EDC16CP33_V62_AC195 / EDC16CP33_V26_AC195 /
EDC16CP33_V60_AC195
EEDC16CP33
Program No.: C4
Vdiag No.: 18, 1C, 20, 24,
26, 28, 54, 58, 5C, 60, 62
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.

13B-455V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
AC225RAIL 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:
•3RG between the components 120 and 1198.
Check the + 12 V after relay supply to the rail pressure regulator (DRV) of the following connection:
•3FB of component 1198.
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 AC225, if you can hear a slight whistling noise and rattling from the pressure regulator, go to step
2, otherwise, check the operation of the computer output stage:
Vehicle under + after ignition feed, clear the faults displayed by the diagnostic tool.
With the voltmeter in the direct current position:
With the rail pressure regulator connected, connect the voltmeter earth lead to connection3RG of
component1198 and the positive lead to connection3FB of component1198. Run command AC225, the
voltmeter should display four successive voltages between 2 V and 2.4 V.
If the measurement is not correct, contact the Techline.
STEP 2
EDC16CP33_V18_AC225 / EDC16CP33_V1C_AC225 / EDC16CP33_V54_AC225 / EDC16CP33_V20_AC225 / EDC16CP33_V58_AC225 /
EDC16CP33_V5C_AC225 / EDC16CP33_V24_AC225 / EDC16CP33_V04_AC225 / EDC16CP33_V08_AC225 / EDC16CP33_V44_AC225 /
EDC16CP33_V4C_AC225 / EDC16CP33_V34_AC225 / EDC16CP33_V38_AC225 / EDC16CP33_V74_AC225 / EDC16CP33_V28_AC225 /
EDC16CP33_V62_AC225 / EDC16CP33_V26_AC225 / EDC16CP33_V60_AC225
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-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-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-471
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
ALP1
CONTINUED
While shunting the "normally open" contact of the supply relay i.e. connections BP37 and 3FB of component 983
or 1337:
•3FB of component 120, (with test shunt)
•3FB1 of component 120, (with test shunt)
•3FB2 of component 120, (with test shunt)
Check the continuity and absence of interference resistance of the following connection:
•3AA between components 120 and 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.
Try to establish dialogue with another computer on the same vehicle.
If dialogue is established with another computer on the same vehicle, go to step 2.
If dialogue is not established with any other computer on the same vehicle, (see 88B, Multiplexing, ALP 1).
STEP 2
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-472
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 starting difficult or impossible
NOTESBefore analysing this customer complaint, check that there are no faults, and the
conformity (or otherwise) of the parameters and statuses, using the diagnostic tool.
If the customer complaint is not eliminated, perform the following checks.
Use the Wiring Diagram Technical Note, Laguna II ph2, Vel Satis ph2, Espace IV
ph2, Mégane II ph2, Scénic II ph2.
Is it difficult or impossible to start
the engine?PART
B
PART A:
If fault DF308 Clogged particle filter is present, consult the interpretation of DF308.
Check the engine earths.
If the engine speed is less than 200 rpm, refer to Technical Note 6014A, Charging circuit check, Starter fault
finding, Starter (formerly Technical Note 3632A).
If an engine speed of 200 rpm is achieved with starter motor in operation, PR055 Engine speed.
If the engine speed is zero with the diagnostic tool:
Measure the resistance between connections 3BG and 3BL of component 149.
If the sensor resistance is not between: 600 Ω < X < 1000 Ω, replace the sensor.
Check the continuity and absence of interference resistance on the following connections:
•3BG between the components 120 and 149,
•3BL between components 120 and 149.
Impossible
Difficult
EDC16CP33_V18_ALP02 / EDC16CP33_V1C_ALP02 / EDC16CP33_V54_ALP02 / EDC16CP33_V20_ALP02 / EDC16CP33_V58_ALP02 /
EDC16CP33_V5C_ALP02 / EDC16CP33_V24_ALP02 / EDC16CP33_V04_ALP02 / EDC16CP33_V08_ALP02 / EDC16CP33_V44_ALP02 /
EDC16CP33_V4C_ALP02 / EDC16CP33_V34_ALP02 / EDC16CP33_V38_ALP02 / EDC16CP33_V74_ALP02 / EDC16CP33_V28_ALP02 /
EDC16CP33_V62_ALP02 / EDC16CP33_V26_ALP02 / EDC16CP33_V60_ALP02
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74