2010 RENAULT SCENIC fuel pressure

13B-179
AFTER REPAIRDeal with any faults displayed by the diagnostic tool. Clear the computer fault
memory.
Carry out a road test followed by another check with the diagnostic tool.
V10 MR-372-J84-13B100$170.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
PR038RAIL PRESSURE
PARAMETER
DEFINITIONThis parameter indicates the fuel pressure in the rail in bars.
NOTESThere must be no present or stored faults.
Perform this fault finding procedure:
–after an inconsistency appears on the Parameter screen,
–following a customer complaint (starting problems, poor performance, stalling, etc.).
Special note:
Default value: 2000 bar.
See the Wiring diagrams Technical Note for the vehicle.
Conformity check: Engine stopped and ignition on, or engine running and engine coolant
temperature > 80
°C
Cold, PR038 = 1 bar.
In the event of a fault, consult the interpretation of fault DF007 Rail pressure sensor circuit.
DCM1.2_V48_PR038/DCM1.2_V4C_PR038/DCM1.2_V50_PR038/DCM1.2_V54_PR038/DCM1.2_V58_PR038/DCM1.2_V5C_PR038

13B-182
AFTER REPAIRDeal with any faults displayed by the diagnostic tool. Clear the computer fault
memory.
Carry out a road test followed by another check with the diagnostic tool.
V10 MR-372-J84-13B100$170.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
PR059INLET AIR TEMPERATURE
PARAMETER
DEFINITIONThis parameter indicates the inlet air temperature in °C.
NOTESSee the Wiring diagrams Technical Note for the vehicle.
Conformity check: Engine stopped, ignition on or engine running.
Check the condition of the air temperature/pressure sensor connectors (flowmeter).
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.
Measure the resistance between connections 3B and 3DW of the air flowmeter.
If the resistance of the air temperature / pressure sensor is not:
(theoretical values)
3553 Ω < R < 3875 Ω at 10
°C
2353 Ω < R < 2543 Ω at 20
°C
1613 Ω < R < 1729 Ω at 30
°C,
replace the air temperature/pressure sensor (see MR 364 (Mégane II), MR 370 (Scénic II), MR 385 (Modus),
MR 392 (Clio III), MR 411 (New Twingo), MR 417 (Kangoo 2), Mechanical, 12A, Fuel mixture, Air flowmeter:
Removal - Refitting).
DCM1.2_V48_PR059/DCM1.2_V4C_PR059/DCM1.2_V50_PR059/DCM1.2_V54_PR059/DCM1.2_V58_PR059/DCM1.2_V5C_PR059

13B-192
AFTER REPAIRDeal with any faults displayed by the diagnostic tool. Clear the computer fault
memory.
Carry out a road test followed by another check with the diagnostic tool.
V10 MR-372-J84-13B100$170.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
PR132AIR FLOW
PARAMETER
DEFINITIONThis parameter indicates the inlet air flow in mg/st.
NOTESSpecial notes:
For vehicles that are not equipped with a flowmeter, the air flow is estimated using
the following parameters:
–Inlet air temperature,
–The atmospheric pressure,
–The EGR valve position,
–The fuel flow,
–The engine speed.
There must be no faults present.
Perform this fault finding procedure:
–after finding an inconsistency in the parameter,
–or after a customer complaint (lack of power, smoke etc.).
See the Wiring diagrams Technical Note for the vehicle.
Conformity check with engine stopped and ignition on.
Indicates the inlet air flow PR132 ≈ 0 mg/st.
Conformity check: Engine running at idle speed and engine coolant temperature > 80
°C
Indicates the inlet air flow PR132 ≈ 200 mg/st.
DCM1.2_V48_PR132/DCM1.2_V4C_PR132/DCM1.2_V50_PR132/DCM1.2_V54_PR132/DCM1.2_V58_PR132/DCM1.2_V5C_PR132

13B-193
AFTER REPAIRDeal with any faults displayed by the diagnostic tool. Clear the computer fault
memory.
Carry out a road test followed by another check with the diagnostic tool.
V10 MR-372-J84-13B100$170.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
PR132
CONTINUED
Sensor electrical conformity
Test the air inlet circuit (from the air filter inlet to the inlet manifold tracts, run test 5 Inlet circuit check):
–air filter unit inlet not blocked and filter not clogged,
–oil vapour recirculation circuit connected correctly,
–low and high pressure air circuit sealed and not obstructed: ducts, mounting clamps present and tightened,
turbocharging pressure sensor fitted, exchanger, etc., run TEST 1 Low pressure circuit check and TEST 7
High pressure circuit sealing check
–check that the damper valve is not jammed closed.
Carry out the necessary repairs.
Check the electrical conformity of the air flowmeter:
Check the + 5 V supply of the air flowmeter on the following connection:
–3KJ of component 799.
Check the + 12 V after relay supply of the air flowmeter on the following connection:
–3FB (or 3FB3) of component 799.
Check the continuity and absence of interference resistance of the following connections:
–3DV,
–3DW, between components 120 and 799.
Flowmeter connected, vehicle ignition on and engine stopped:
Measure the voltage between connections 3DW and 3DV of component 799.
If the voltage is not between 0.3 V and 0.7 V, replace the air flowmeter, component code 799 (see MR 364 (Mégane
II), MR 370 (Scénic II), MR 385 (Modus), MR 392 (Clio III), MR 411 (New Twingo), MR 417 (Kangoo 2),
Mechanical, 12A, Fuel Mixture, Air Flowmeter: Removal - Refitting).

13B-199
AFTER REPAIRDeal with any faults displayed by the diagnostic tool. Clear the computer fault
memory.
Carry out a road test followed by another check with the diagnostic tool.
V10 MR-372-J84-13B100$170.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
PR730
CONTINUED
If the resistance of the air flowmeter or the exterior air temperature sensor is not:
(theoretical values for flowmeter K9K 724, 766, 768, 800 and 802)
at -10
°C: 8716 Ω < X < 9688 Ω
at 0
°C: 5497 Ω < X < 6051 Ω
at 10
°C: 3553 Ω < X < 3875 Ω
at 20
°C: 2353 Ω < X < 2543 Ω
at 30
°C: 1613 Ω < X < 1729 Ω
(theoretical values for exterior air temperature sensor K9K 750, 752, 740 and 812)
at -10
°C: 8623 Ω < X < 10454 Ω
at 25
°C: 1928 Ω < X < 2174 Ω
at 50
°C: 763 Ω < X < 857 Ω,
replace the air temperature/pressure sensor or the exterior air temperature sensor, component code 272 (see
MR 364 (Mégane II), MR 370 (Scénic II), MR 385 (Modus), MR 392 (Clio III), MR 411 (New Twingo), MR 417
(Kangoo 2), Mechanical, 12A, Fuel mixture, Air flowmeter: Removal - Refitting).

13B-207V10 MR-372-J84-13B100$190.mif
13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
Some specific checks are grouped together into tests and are used as required in various fault finding charts (ALPs)
or fault interpretations.
NOTESOnly consult these tests when dealing with a fault finding chart (ALP) or when
interpreting faults.
Low pressure circuit check TEST 1
Electrical circuit check TEST 2
Injector check TEST 3
Inlet circuit check TEST 5
High pressure system check TEST 6
High pressure circuit sealing check TEST 7
Injector return flow TEST 8
Diesel filter check TEST 9
Turbocharger solenoid valve check TEST 10
Air line at the turbocharger TEST 11
Turbocharger TEST 12
Diesel fuel conformity check TEST 13
Accelerator pedal check TEST 14
DIESEL INJECTION
Fault finding – Tests

13B-208V10 MR-372-J84-13B100$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
TEST 1 Low pressure circuit check
Check the conformity of the low pressure circuit
connections.
Are the low pressure circuit connections correct? Carry out the necessary repairs.
Check the condition of the priming bulb, and that it is
working properly.
Look for leaks at the unions.
Are there leaks from the hoses and unions? Carry out the necessary repairs.
Check that there are no air bubbles in the diesel fuel.–Bleed the low-pressure circuit.
–Place a container under the filter.
–Disconnect the return hose from the filter
and plug the filter.
–Pump using the priming bulb until there is no
air left.
–Reconnect the return hose immediately. Are air bubbles present in the low pressure circuit?
Low pressure circuit correct.
NO
YES
YES
NO
YES
NO
DCM1.2_V48_TEST1/DCM1.2_V4C_TEST1/DCM1.2_V50_TEST1/DCM1.2_V54_TEST1/DCM1.2_V58_TEST1/DCM1.2_V5C_TEST1

13B-212V10 MR-372-J84-13B100$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
TEST 6 High pressure system check
NOTESSpecial note:
Certain faults make it impossible to carry out this test - deal with these first.
WARNING
Running the starter motor for more than 5 seconds is dangerous and serves no
useful purpose.
Preliminary checks:
–Check for the presence of fuel
–Check that there is no air in the low pressure circuit. Run TEST 1 Low pressure circuit check.
–Ensure that the correct fuel is being used. Run test 13 Diesel fuel conformity check.
The pump's capacity to produce high pressure can be checked by the following procedure:
–With the ignition off, disconnect the low pressure actuator from the pump (IMV brown connector)
and connect a test IMV or the adapter of MOT. 1711.
–Electrically disconnect the four injectors.
–Switch on the ignition, connect the diagnostic tool and re-establish dialogue with the injection system.
–Go to the Main computer statuses and parameters screen.
–Run the test cold, PR064 "Coolant temperature" < 30
°C or equal to ambient temperature.
–Engage the starter for 5 seconds.
–Read the maximum rail pressure value PR038 Rail pressure during the test on the diagnostic tool.
A
DCM1.2_V48_TEST6/DCM1.2_V4C_TEST6/DCM1.2_V50_TEST6/DCM1.2_V54_TEST6/DCM1.2_V58_TEST6/DCM1.2_V5C_TEST6