2011 RENAULT SCENIC compression ratio

13B-13V9 MR-372-J84-13B450$040.mif
DIESEL INJECTION
Fault finding – Role of components13B
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58
Particle filter:
The particle filter retains the particles for destruction during regeneration, preventing these particles from being
discharged into the atmosphere (engine type F9Q816 only).
TDC sensor:
The angular position is measured using a magneto-inductive sensor triggered by the machined teeth on the engine
flywheel. This sensor gives the engine speed as well as the position of the crankshaft for injection.
Camshaft sensor:
This sensor provides a signal to perform the injection cycle.
When the piston for cylinder 1 is at top dead centre (TDC), it may be either at the end of the compression stroke or
at the end of the exhaust stroke. The camshaft sensor makes the distinction between these two states.
Electric coolant pump:
The electric water pump is activated if the coolant temperature has reached a significant temperature threshold
when the engine has stopped.
Role: to cool the turbocharger when the engine is stopped.
Refrigerant pressure sensor:
Its role is to measure the refrigerant pressure in the air conditioning circuit.
Heating elements:
The heating elements heat the engine coolant to improve user comfort (only on certain types of F9Q816 engine
in Vdiag 48).
Engine coolant temperature sensor:
The engine coolant temperature sensor informs the computer of the engine coolant temperature.
Air temperature sensor:
The air temperature sensor is fitted inside the inlet manifold and informs the computer of the temperature of the air
taken in by the engine.
Turbocharging pressure sensor solenoid valve:
This solenoid valve operates the turbocharger wastegate pneumatic circuit to lower the turbocharging pressure.
Catalytic converter:
The role of the catalytic converter is to convert pollutant gases into harmless gases.
Fan unit relay:
This relay controls the activation of the engine cooling fan assembly when a temperature threshold has been
exceeded.
Accelerator potentiometer:
The accelerator potentiometer informs the computer of the position of the accelerator pedal (engine load).

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DIESEL INJECTION
Fault finding – Interpretation of faults13B
DF065
CONTINUED
DF065 appears on the diagnostic tool when the engine management computer has detected a fault during the
combustion phase several times in succession.
Several components may be responsible:
– the piston rings,
– the piston,
– the valves,
– the injector,
– the heater plug sealing.
Check that the stored injector codes are consistent with those engraved on each injector. If not, run command
SC002 Enter injector codes, and follow the procedure.
When dealing with a number of misfiring faults, check the fuel conformity by running test 11 Diesel fuel
conformity check.
Check the engine compressions.
Carry out the necessary repairs.
If the fault is still present, apply test 10: Incorrect injector operation.
If the fault is still present, contact the Techline.
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 using the diagnostic tool.
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58

13B-392
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
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DIESEL INJECTION
Fault finding – Fault Finding Chart13B
ALP7
CONTINUED
Check the high pressure circuit (external leaks) (see the end of ALP6 Fuel circuit external leaks)
Check the timing setting (and the position of the high pressure pump pinion)
Check the lower engine:
– Check the compressions using the CLIP diagnostic tool, use command VP036 Fuel supply inhibition.
– Only check the engine stand if there is noise or excessive vibration when idling.
If the checks are correct, contact the Techline.
A
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58

13B-402
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
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DIESEL INJECTION
Fault finding – Fault Finding Chart13B
ALP11
CONTINUED 3
– Check the consistency between the IMA codes read on the CLIP diagnostic tool and the codes engraved on
the injector bodies,
– Check that the particle filter differential pressure sensor is correctly positioned and connected (see MR 364
(Megane II) or 370 (Scenic II), Mechanical, 19B Exhaust, Particle filter pressure sensor: Removal -
Refitting),
– Check the exhaust pipe see (Test1 Exhaust pipe check),
– Check the air inlet circuit see (Test 4 Turbocharged air inlet circuit check),
– Check the air flowmeter, (see Test 5 Air flowmeter),
– Check the turbocharger, (see Test 6 Turbocharger control solenoid valve test and Test 7 Turbocharger),
– Check the injectors, (see Test 10 Poor injector operation),
– Check the cylinder compressions.
If the fault has not been located and the customer complaint is still present, contact the Techline.
A
EDC16 C36
Program No.: 91
Vdiag No.: 48, 58

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DIESEL INJECTION
Fault finding – Tests13B
TEST10 Incorrect injector operation
Part A: Fuel regulation balance check for each injector (individual correction):
– In the CLIP diagnostic tool, choose the Fuel circuit sub-function.
– With the engine idling and the fuel temperature > 50°C, view the flow correction values of each injector (individual
correction), i.e.:
– PR364 Cylinder no. 1 fuel flow correction.
– PR405 Cylinder no. 2 fuel flow correction.
– PR406 Cylinder no. 3 fuel flow correction.
– PR365 Cylinder no. 4 fuel flow correction.
The flow correction range by injector is between -5 mg/st and +5 mg/st without reaching these values.
If this has not already been carried out, check the injector connections and wiring.
– Check the connections and wiring of the engine management computer to the injectors.
– Repair if necessary.
–Check the IMA injector codes, comparing the IMA codes on the injectors (the IMA codes must be read from left
to right) and the IMA codes read in the CLIP diagnostic tool.
– If the IMA codes are correct, continue the fault finding procedure,
– If not, enter the incorrect IMA codes using command SC002 Enter injector codes (see Interpretation of
commands).
To validate the repair, consult the Part B Confirmation of flow correction fault finding for each injector
(individual correction).
CASE No. 1: If at least one of the values is greater than or equal to + 5 mg/st
– Check the valve clearance.
– Check the status of the engine and the compressions (using the CLIP diagnostic tool or using a compression
gauge).
– If the compression test reveals a cylinder fault, carry out the necessary repairs.
– If the compression is correct, check the fitting conformity of the injector (see MR 364 (Mégane II) or 370 (Scénic
II), 13B, Diesel injection, Diesel injector: Removal - Refitting)
Ensure that each injector has only one heat protection washer.
Check the fuel regulation again for each injector (individual correction).
– Otherwise, replace the injector and check the presence of the sealing washer. Modify the IMA code using the
command SC002 Enter injector codes (see Interpretation of commands).
–Apply the Part B Confirmation of flow correction fault finding for each injector (individual correction) to
confirm the fault finding.
EDC16C36_V44_TEST10/EDC16C36_V4C_TEST10/EDC16C36_V48_TEST10/EDC16C36_V50_TEST10/EDC16C36_V54_TEST10/
EDC16C36_V58_TEST10
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
EDC16 C36
Program No.: 91
Vdiag No.: 44, 4C, 48,
50, 54, 58