fuel pressure RENAULT SCENIC 2012 J95 / 3.G Engine And Peripherals EDC16CP33 Owner's Manual

13B-376V12 MR-372-J84-13B300$122.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
PR157FUEL FLOW SETPOINT
PARAMETER
DEFINITIONThis parameter indicates the fuel flow setpoint in mg/st.
NOTESSpecial notes:
Only perform these tests if the parameters do not correspond with the system
operation programming.
Conformity check: Engine stopped and ignition on
The fuel flow setpoint value must be:
PR157 = 0 mg/st (ignition on).
In the event of a fault, consult the interpretation of DF897 Pump pressure regulator circuit.
Conformity check with the engine running and engine coolant temperature > 80°C
Engine running: PR017: Fuel flow = PR157.
In the event of a fault, refer to the interpretation of fault DF897.
EDC16CP33_V18_PR157 / EDC16CP33_V1C_PR157 / EDC16CP33_V54_PR157 / EDC16CP33_V20_PR157 / EDC16CP33_V58_PR157 /
EDC16CP33_V5C_PR157 / EDC16CP33_V24_PR157 / EDC16CP33_V04_PR157 / EDC16CP33_V08_PR157 / EDC16CP33_V44_PR157 /
EDC16CP33_V4C_PR157 / EDC16CP33_V34_PR157 / EDC16CP33_V38_PR157 / EDC16CP33_V74_PR157 / EDC16CP33_V28_PR157 /
EDC16CP33_V62_PR157 / EDC16CP33_V26_PR157 / EDC16CP33_V60_PR157
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
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-396V12 MR-372-J84-13B300$122.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
OCR*: Opening Cyclic Ratio
PR484FUEL REGULATION SOLENOID VALVE OCR*
PARAMETER
DEFINITIONThis parameter indicates the solenoid valve opening ratio as a %.
Conformity check with engine stopped and ignition on.
The value of the solenoid valve opening ratio must be:
PR484 = 0%.
In the event of a fault, consult the interpretation of DF897 Pump pressure regulator circuit.
Conformity check: Engine running, engine coolant temperature > 80°C
The solenoid valve opening value must be between:
30% < PR484 < 40%.
In the event of a fault, refer to the interpretation of fault DF897.
EDC16CP33_V18_PR484 / EDC16CP33_V1C_PR484 / EDC16CP33_V54_PR484 / EDC16CP33_V20_PR484 / EDC16CP33_V58_PR484 /
EDC16CP33_V5C_PR484 / EDC16CP33_V24_PR484 / EDC16CP33_V04_PR484 / EDC16CP33_V08_PR484 / EDC16CP33_V44_PR484 /
EDC16CP33_V4C_PR484 / EDC16CP33_V34_PR484 / EDC16CP33_V38_PR484 / EDC16CP33_V74_PR484 / EDC16CP33_V28_PR484 /
EDC16CP33_V62_PR484 / EDC16CP33_V26_PR484 / EDC16CP33_V60_PR484
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-401V12 MR-372-J84-13B300$122.mif
DIESEL INJECTION
Fault finding – Interpretation of parameters13B
PR739FUEL FLOW SOLENOID VALVE CURRENT
PARAMETER
DEFINITIONThis parameter indicates the current absorbed by the fuel flow solenoid valve inmA.
Conformity check with engine stopped and ignition on.
The value of the current absorbed by the fuel flow solenoid valve must be:
PR739 ≈ 200 mA.
In the event of a fault, consult the interpretation of DF897 Pump pressure regulator circuit.
Conformity check with the engine running and engine coolant temperature > 80°C
The value of the current absorbed by the fuel flow solenoid valve must be:
PR739 ≈ 300 mA.
In the event of a fault, refer to the interpretation of fault DF897.
EDC16CP33_V18_PR739 / EDC16CP33_V1C_PR739 / EDC16CP33_V54_PR739 / EDC16CP33_V20_PR739 / EDC16CP33_V58_PR739 /
EDC16CP33_V5C_PR739 / EDC16CP33_V24_PR739 / EDC16CP33_V04_PR739 / EDC16CP33_V08_PR739 / EDC16CP33_V44_PR739 /
EDC16CP33_V4C_PR739 / EDC16CP33_V34_PR739 / EDC16CP33_V38_PR739 / EDC16CP33_V74_PR739 / EDC16CP33_V28_PR739 /
EDC16CP33_V62_PR739 / EDC16CP33_V26_PR739 / EDC16CP33_V60_PR739
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.

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13B
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74
NOTESThe commands are run to check the correct operation of certain components or to
replace parts.
Tool command Diagnostic tool title
SC001Write saved data
SC002Enter injector codes
SC003Save computer data
SC017Particle filter regeneration (except Vdiag 18, 04, 08, 44, 4C, 34, 38, 74)
SC031Operational fault finding of cylinders (except Vdiag 18)
SC035High pressure fuel circuit fault finding
SC036Reinitialise programming
RZ001Fault memory
RZ005Programming
RZ034Computer memory
AC004Turbocharging solenoid valve
AC012Damper valve
AC031Thermoplunger No. 3 relay
AC037Preheating relay
AC063Thermoplunger No. 1 relay
AC064Thermoplunger No. 2 relay
AC103EGR by-pass
AC153High speed fan assembly (except Mégane II ph2 and Scénic II ph2)
AC154Low speed fan assembly (except Mégane II ph2 and Scénic II ph2).
AC195Electric coolant pump (except Vdiag 04, 08, 44, 4C, 34, 38, 74)
AC225Rail pressure regulator
AC226Pump pressure regulator.
MT001Turbocharging function (Vdiag 04 and 44 only)
VP010Write VIN
VP036Fuel supply inhibited
DIESEL INJECTION
Fault finding – Command summary table

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DIESEL INJECTION
Fault finding – Interpretation of commands13B
SC035HIGH PRESSURE FUEL CIRCUIT FAULT FINDING
NOTESThis command is used to interpret the state of the high pressure fuel circuit (high
pressure pump, rail, injectors and high pressure supply pipes).
To run this command, select scenario SC035 on the diagnostic tool.
Procedure to be followed:
– select scenario SC035,
– follow the instructions then “confirm”,
– with the command in progress: do not operate on the vehicle,
– switch off the engine at the end of the test,
–the diagnostic tool displays the results,
– end of test.
Interpretation of correct results:
– If the results displayed are OK, the entire high pressure fuel circuit is in order. There is no need for any
operation.
STEP X
(X is the variable
from 1 to 4)Rail pressure Raise
timeRail pressure Dump
timeInterpretation of
results
STEP X OK OK No operation
STEP 5 OK No operation
EDC16CP33_V18_SC035 / EDC16CP33_V1C_SC035 / EDC16CP33_V54_SC035 / EDC16CP33_V20_SC035 / EDC16CP33_V58_SC035 /
EDC16CP33_V5C_SC035 / EDC16CP33_V24_SC035 / EDC16CP33_V04_SC035 / EDC16CP33_V08_SC035 / EDC16CP33_V44_SC035 /
EDC16CP33_V4C_SC035 / EDC16CP33_V34_SC035 / EDC16CP33_V38_SC035 / EDC16CP33_V74_SC035 / EDC16CP33_V28_SC035 /
EDC16CP33_V62_SC035 / EDC16CP33_V26_SC035 / EDC16CP33_V60_SC035
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-434V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
SC035
CONTINUED 1
Interpretation of incorrect results:
– Is one of the value definitions for the various displayed stages is “TOO SLOW” or “TOO FAST”, see the
following table:
STEP X
(X is the variable
from 1 to 4)Rail pressure Raise
timeRail pressure Dump
timeInterpretation of
results
STEP X TOO SLOW TOO SLOW Check 1
STEP X TOO SLOW TOO FAST Check 2
STEP X TOO SLOW OK Check 3
STEP X OK TOO SLOW Check 4
STEP X OK TOO FAST Check 5
STEP 5 TOO FAST Check 5
Explanation of results interpretation:
Check 1:
–Apply Test 10 Poor injector operation.
–Apply ALP6 Fuel circuit leaks.
–Apply Test 3 Low pressure circuit check.
– Replace the high pressure pump.
Check 2:
–Apply Test 10.
–Apply ALP6.
– Apply the part of Test 3 concerning the fuel filter.
– Replace the high pressure pump.
– Check the injector return flow and the injectors.
– Check the rail pressure regulator by running command AC225 Rail pressure regulator.
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-456V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
AC225
CONTINUED
STEP 2
In the event of rail overpressure:
Check that there are no air bubbles in the diesel fuel low pressure circuit.
Check that the rail pressure sensor is working, and then interpret parameter PR038 Rail pressure.
If these checks do not reveal any faults, replace the rail regulator.
in the event of rail underpressure:
Check the correct operation of the rail pressure sensor, as well as the interpretation of parameter PR038.
Check the low pressure diesel circuit priming.
Check the conformity of the diesel filter connections.
Check the condition of the filter (clogging and water saturation).
Check that there are no air bubbles between the filter and the high pressure pump.
Check the sealing of the low and high pressure diesel fuel systems: use ALP6 Fuel circuit leaks (visual
inspections, touch tests, odours, etc.) on:
pump body, pressure release valve, pipes, rail and injectors unions, injector wells, etc.
Check the conformity of the seal fitting on the pressure regulator.
Check the operation of the injectors: run Test 10 Incorrect injector operation.
Carry out the necessary repairs.
If the engine starts:
Clear any faults.
Check the rail pressure regulator using ALP7 Rough idling.
With the engine warm, leave it to idle for a few minutes (3 to 5 minutes):
– If it stalls and the fault reappears, replace the rail pressure regulator.
– If it does not stall, stabilise the engine speed at 2000 rpm (1 minute) then depress the accelerator fully until the
maximum engine speed imposed by the computer is obtained (~5500 rpm). The maximum rotation speed of the
engine must be stabilised in the time taken to fully depress and then fully release the pedal. This test is carried
out with no load (engine in neutral).
– If the engine stalls, contact the Techline
If the engine does not start or there is no timing, first replace the rail pressure regulator.
If the fault is still present, 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
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.

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DIESEL INJECTION
Fault finding – Interpretation of commands13B
AC226
CONTINUED
STEP 2
In the event of rail overpressure:
Check that there are no air bubbles in the diesel fuel low pressure circuit.
Check that the rail pressure sensor is working, and then interpret parameter PR038 Rail pressure.
If these checks do not reveal any faults, replace the pump regulator.
in the event of rail underpressure:
Check the correct operation of the rail pressure sensor, as well as the interpretation of parameter PR038.
Check the low pressure diesel circuit priming.
Check the conformity of the diesel filter connections.
Check the condition of the filter (clogging and water saturation).
Check that there are no air bubbles between the filter and the high pressure pump.
Check the sealing of the low and high pressure diesel fuel systems: use ALP6 Fuel circuit leaks (visual
inspections, touch tests, odours, etc.) on:
pump body, pressure release valve, pipes, rail and injectors unions, injector wells, etc.
Check the conformity of the seal fitting on the pressure regulator.
Check the operation of the injectors: run Test 10 Poor injector operation in this document.
Carry out the necessary repairs.
If the engine starts:
Clear any faults.
Check the pump pressure regulator by applying (see ALP 7 Rough idle).
With the engine warm, leave it to idle for a few minutes (3 to 5 minutes):
– If it stalls and the fault reappears, replace the pump regulator.
– If the engine does not stall, stabilise the engine speed at 2000 rpm (1 minute) then depress the accelerator
pedal fully until the maximum engine speed imposed by the computer is obtained (~5500 rpm). The maximum
rotation speed of the engine must be stabilised in the time taken to fully depress and then fully release the pedal.
This test is carried out with no load (engine in neutral).
– If the engine stalls, contact the Techline
If the engine does not start or does not stall, first replace the pump regulator.
If the fault is still present, 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
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.

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DIESEL INJECTION
Fault finding – Interpretation of commands13B
MT001
CONTINUED 2
PHASE 1:
Preliminary test:
Engine speed between: 2480 rpm < X < 2520 rpm
Coolant temperature > 70°C
EGR valve feedback position < 1%
If data from the preliminary checks indicates a non-conformity, check the fuel circuit then contact the Techline.
Interpretation:
If, during phase 1, no data is outside the maximum and minimum limits for each variable, interpret the Monitool
analysis for phase 2.
Faults, Values outside the limitsThreshold Fault finding procedure
Air flow < Minimum thresholdMinimum threshold < Turbocharging
pressure < maximum thresholdFault finding procedure Monitool no. 1
Turbocharging pressure < minimum
thresholdFault finding procedure Monitool no. 2
Turbocharging pressure > maximum
thresholdContact Techline
Air flow > maximum thresholdMinimum threshold < Turbocharging
pressure < maximum thresholdFault finding procedure Monitool no. 3
Turbocharging pressure < minimum
thresholdContact Techline
Turbocharging pressure > maximum
thresholdContact Techline
Turbocharging pressure
< minimum thresholdMinimum threshold < Air flow
< maximum thresholdFault finding procedure Monitool no. 4
Air flow < Minimum threshold
Fault finding procedure Monitool no. 2
Air flow > maximum threshold Contact Techline
Turbocharging pressure
> maximum thresholdMinimum threshold < Air flow
< maximum thresholdFault finding procedure Monitool no. 5
Air flow < Minimum threshold Contact Techline
Air flow > maximum threshold Contact Techline
EDC16CP33
Program No.: C4
Vdiag No.: 04, 44
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.

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DIESEL INJECTION
Fault finding – Interpretation of commands13B
MT001
CONTINUED 7
PHASE 3:
Preliminary test:
Engine speed between: 2480 rpm < X < 2520 rpm
Coolant temperature > 70°C
EGR valve feedback position < 1%
Interpretation:
If, during phase 3, there is no data outside of the maximum and minimum limits for each variable, then the air line
is correct and no component replacement is to be carried out. Check the fuel circuit or deal with present or stored
faults which are displayed on the diagnostic tool.
Note: the interpretation of faults during phase 3 should only be carried out in the following situation:
– The variables measured during phase 1 and 2 are correct, i.e. they are within the minimum and maximum
authorised limits. If this is not the case, apply the different Monitool fault finding procedures which relate to the
different faults revealed during the phase 1 and phase 2. To confirm the repairs or modifications carried out, run
the MT001 monitool test again.
Faults, Values outside the limitsThreshold Fault finding procedure
Air flow < Minimum thresholdMinimum threshold < Turbocharging
pressure < maximum thresholdFault finding procedure Monitool no. 7
Turbocharging pressure < minimum
thresholdFault finding procedure Monitool no. 8
Turbocharging pressure > maximum
thresholdContact Techline
Air flow > maximum thresholdMinimum threshold < Turbocharging
pressure < maximum thresholdContact Techline
Turbocharging pressure < minimum
thresholdContact Techline
Turbocharging pressure > maximum
thresholdContact Techline
Turbocharging pressure
< minimum thresholdMinimum threshold < Air flow < maximum
thresholdContact Techline
Air flow < Minimum thresholdFault finding procedure Monitool no. 8
Air flow > maximum threshold Contact Techline
Turbocharging pressure
> maximum thresholdMinimum threshold < Air flow < maximum
thresholdContact Techline
Air flow < Minimum threshold Contact Techline
Air flow > maximum threshold Contact Techline
EDC16CP33
Program No.: C4
Vdiag No.: 04, 44
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.