2012 RENAULT SCENIC pressure

13B-481
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
ALP6 Fuel system leaks
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.
IMPORTANT:
Please observe the cleanliness guidelines and safety advice.
Procedure for checking for an external leak on the fuel circuit:
Clean away traces of grease with clean thinner and wipe the part or parts concerned with cleaning cloths.
Start the engine and increase the engine temperature until the diesel fuel reaches 40/50°C.
Stop the engine and check for traces of grease on the part or parts concerned.
If this is the case, replace the part or parts concerned.
Does the priming bulb show traces of grease?
(Visual and tactile inspections)
Check the assembly of the components and
the condition of the seal at the union of the two
components, if the leak is at the seal.
Replace the part or the parts concerned.
Bleed the fuel circuit and continue the checks.
Check the counter pressure valve located on
the fuel return line, after the injectors. Does the diesel filter show traces of grease?
(Visual and tactile inspections)
Do the fuel return pipes show traces of grease?
(Visual and tactile inspections)
YES
NO
YES
NO
YES
NO
A
EDC16CP33_V18_ALP06 / EDC16CP33_V1C_ALP06 / EDC16CP33_V54_ALP06 / EDC16CP33_V20_ALP06 / EDC16CP33_V58_ALP06 /
EDC16CP33_V5C_ALP06 / EDC16CP33_V24_ALP06 / EDC16CP33_V04_ALP06 / EDC16CP33_V08_ALP06 / EDC16CP33_V44_ALP06 /
EDC16CP33_V4C_ALP06 / EDC16CP33_V34_ALP06 / EDC16CP33_V38_ALP06 / EDC16CP33_V74_ALP06 / EDC16CP33_V28_ALP06 /
EDC16CP33_V62_ALP06 / EDC16CP33_V26_ALP06 / EDC16CP33_V60_ALP06
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-482
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
ALP6
CONTINUED 1
Does the high pressure pump
show traces of grease?
(Visual and tactile inspections)Location of the leak: Where does the leak appear?
Do the high pressure pipes and the
injector rail show traces of grease?
(Visual and tactile inspections)– If the leak is on the component, replace this and
the high pressure pipe(s) at the same time as
the component.
Do the injectors show traces of
grease?
(Visual and tactile inspections)– If the leak is on the join of a high pressure pipe and the
component, remove the high pressure pipe and perform a
visual inspection of the unions: if you find damaged unions,
change the faulty component and the high pressure pipe(s)
removed at the same time as the component.
– For safety reasons, high pressure pipes must not be refitted.
NO
A
YES
C
YES
YES
YES
NOOn the componentOn the union / join
NO
NO
B
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-483
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
ALP6
CONTINUED 2
– Run command SC035 High pressure fuel circuit fault
finding.
– While running the test, check that there are no leaks from the
high pressure circuit.
Is there a leak from the high pressure circuit?
End of fault finding.
Reminder:
Only replace the rail, pump or injector if there is damage to the union and this damage is visible during checks.
Bleed the fuel circuit and continue the checks.
NO
B
C
YES
NO
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-484
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
ALP7 Rough idle
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.
Check the sealing and the condition of the
inlet circuit: run Test 4 Turbocharged air
inlet circuit check. Check the low
pressure circuit: run Test 3 Low pressure
circuit check. Check the engine parameters:
– Check the update of the engine management
computer calibration (last calibration).
– Check the conformity of the IMA* codes (see
Interpretation of commands, SC002 Enter injector
codes).
Check the charging circuit using Technical Note 6014A,
Charging circuit check, Alternator fault finding, 16A,
Alternator (formerly Technical Note 3455A).
– Check that the engine speed signal is correct using an
oscilloscope: no interference, broken tooth, etc.
– If not correct, check:
– The wiring.
– The flywheel position and the condition of the flywheel
teeth.
– Check the position and tightness of the engine speed
sensor. – Check the connections and wiring of the
injectors.
– Check the connections and wiring of the
engine management computer to the
injectors.
Check the high pressure circuit (external
leaks).
(see the end of the Fuel circuit external
leaks fault finding chart)
A
EDC16CP33_V18_ALP07 / EDC16CP33_V1C_ALP07 / EDC16CP33_V54_ALP07 / EDC16CP33_V20_ALP07 / EDC16CP33_V58_ALP07 /
EDC16CP33_V5C_ALP07 / EDC16CP33_V24_ALP07 / EDC16CP33_V04_ALP07 / EDC16CP33_V08_ALP07 / EDC16CP33_V44_ALP07 /
EDC16CP33_V4C_ALP07 / EDC16CP33_V34_ALP07 / EDC16CP33_V38_ALP07 / EDC16CP33_V74_ALP07 / EDC16CP33_V28_ALP07 /
EDC16CP33_V62_ALP07 / EDC16CP33_V26_ALP07 / EDC16CP33_V60_ALP07
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-485
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
IMA*: Individual injector correction
ALP7
CONTINUED
– Check the engine timing (and the
position of the high pressure pump
sprocket).
–Apply part B of Test 10 Poor injector
operation.
Check the lower engine:
– Check the engine mountings.
If the checks are correct, contact the
Techline.If fault DF308 Clogged particle filter is present,
consult the interpretation of DF308.
Run command SC036 Reinitialise programming and
select After particle filter replacement (see
Interpretation of commands).
A
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-490
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
IMA*: Individual injector correction
ALP9
CONTINUED 3
– Check the consistency between the IMA* codes entered and the codes engraved on the injector bodies.
– Check that the particle filter differential pressure sensor is correctly positioned and connected (see MR 395, 402,
405, 364 or 370 Mechanical, 19B Exhaust, Particle filter pressure sensor: Removal - Refitting),
– Check the exhaust pipe (see TEST1 Exhaust pipe check),
– Check the air inlet circuit (see TEST4 Turbocharged air inlet circuit check),
– Check the air flowmeter (see TEST5 Air flowmeter),
– Check the turbocharger (see TEST7 Variable geometry turbocharger check),
– Check the injectors (see TEST10 Poor injector operation),
– Check the cylinder compressions.
If the fault has not been located and the customer complaint is still present, contact the Techline.
YES
E
EDC16CP33
Program No.: C4
Vdiag No.: 18, 1C, 20, 24,
26, 28, 54, 58, 5C, 60, 62

13B-492V12 MR-372-J84-13B300$180.mif
13B
*Technical Note 3419: Fault finding on the turbocharger for petrol and diesel engines. EXHAUST SYSTEM CHECK TEST1
RESOLVING MISFIRESTEST2
LOW PRESSURE CIRCUIT CHECK TEST3
TURBOCHARGED AIR INLET CIRCUIT CHECK TEST4
AIR FLOW SENSORTEST5
FUEL RETURN RAIL VALVE CHECK TEST6
VARIABLE GEOMETRY TURBOCHARGER CONTROLTEST 7: Apply
TEST 4 of
Technical Note
3419*
ROTATING PART OF TURBOCHARGERTEST 8: Apply
TEST 7 of
Technical Note
3419*
POOR INJECTOR OPERATION TEST10
TEMPERATURE UPSTREAM OF TURBINE TOO LOW TEST11
DIESEL FUEL CONFORMITY CHECK TEST12
DIESEL INJECTION
Fault finding – Test
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-497V12 MR-372-J84-13B300$180.mif
DIESEL INJECTION
Fault finding – Test13B
TEST3 Low pressure circuit check
Check the fuel filter:
– Conformity of the fuel filter (correct part number and RENAULT filter).
– Positioning and degree of clogging of the filter cartridge.
– Positioning and condition of the seals.
– If there is metal swarf in the filter:
Replace the fuel filter, bleed the circuit and continue the fault finding procedure.
Supplying the injection system with fuel from an additional tank.
This operation aims to detect possible faults in the low pressure supply system of a vehicle by replacing it entirely
with an additional tank.
Mode:
– Disconnect the diesel fuel supply pipe at the fuel filter inlet and block it with a plug.
– Connect a pipe to the fuel filter inlet and insert the other end in a clean container with a capacity of approximately
5 litres.
– Disconnect the diesel fuel return pipe at the diesel temperature sensor (pump return and injector return join), and
block it using a plug.
– Connect a transparent pipe to the union of the diesel fuel temperature sensor, and insert the other end in the
container.
– Fill the container with clean diesel fuel.
– Start the engine and let the system drain itself of its air (there must not be any air bubbles in the return pipe).
Is the customer complaint still present?If the low pressure circuit is in order, reconnect the
various low pressure circuit pipes, and repeat the
fault finding chart procedure or the procedure for
the fault that referred you to this test.
Are the low pressure circuit connections in order
and in good condition?Carry out the necessary repairs.
YES
NO
NO
A
YES
EDC16CP33_V18_TEST3 / EDC16CP33_V1C_TEST3 / EDC16CP33_V54_TEST3 / EDC16CP33_V20_TEST3 / EDC16CP33_V58_TEST3 /
EDC16CP33_V5C_TEST3 / EDC16CP33_V24_TEST3 / EDC16CP33_V04_TEST3 / EDC16CP33_V08_TEST3 / EDC16CP33_V44_TEST3 /
EDC16CP33_V4C_TEST3 / EDC16CP33_V34_TEST3 / EDC16CP33_V38_TEST3 / EDC16CP33_V74_TEST3 / EDC16CP33_V28_TEST3 /
EDC16CP33_V62_TEST3 / EDC16CP33_V26_TEST3 / EDC16CP33_V60_TEST3
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74