2012 RENAULT SCENIC fuel pressure

13B-433V12 MR-372-J84-13B300$150.mif
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.

13B-458V12 MR-372-J84-13B300$150.mif
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.

13B-461V12 MR-372-J84-13B300$150.mif
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.

13B-466V12 MR-372-J84-13B300$150.mif
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.

13B-473
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
CONTINUED 1
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 conformity of the engine earths (oxidation, tightness, etc.).
Check the mounting and condition (overheating) of the sensor.
Check the synchronisation of the camshaft sensors and the engine speed sensors with the display of ET238
Synchronisation. If synchronisation is not active, refer to the checks described in DF195 Camshaft/engine
speed sensor consistency.
Test the high pressure fuel circuit:
Run scenario SC035 High pressure fuel circuit fault finding.
To interpret the result, apply the interpretation of command SC035 (see Interpretation of commands).
Check the fuel circuit sealing: run Test 3 Low pressure circuit check.
If Test 3 is correct.
If Test 3 is not correct, proceed as follows:
Check the conformity of the type of heater plugs configured:
For Vdiag 20, 24, 38 and 74: consult ET781 Heater plugs in the Ignition/Preheating subfunction and check the
conformity with the type of plugs installed:
– Slow plugs have a black ring.
– Fast plugs have a white ring.
If the heater plugs are being replaced with plugs of a different type (see Replacement of components, Replacing
heater plugs).
For all Vdiags, check that all 4 plugs have the same colour ring.
Check that the heater plugs are actuated using the AC037 Preheating relay command.
Check the sealing and condition of the inlet circuit: run Test 4 Turbocharged air inlet circuit check, and follow
the related fault finding procedure (see Test 4).
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-475
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
CONTINUED 3
PART
B
If fault DF308 Clogged particle filter is present, apply the interpretation of DF308.
Is there diesel in the tank?Fill the tank with diesel fuel.
Bleed the low and high pressure diesel circuit.
Does the starter motor work properly?
(Ensure that the engine speed reaches > ≈ 200
rpm with the starter in operation, PR055 Engine
speed)Refer to Technical Note 6014A, Charging circuit
check, 16A (formerly Technical Note 3455A),
Starter fault finding, Starter (formerly Technical
Note 3632A).
Using the diagnostic tool, check the conformity of the immobiliser: ET003 Immobiliser must be INACTIVE.
Consult the fault finding procedure for the
immobiliser.Continue the fault finding procedure with Part A of
this fault finding chart.
NO
YES
NO
YES
ET003 not correct, or
warning light
permanently onET003 correct
(immobiliser code
warning light off)
EDC16CP33
Program No.: C4
Vdiag No.: 04, 08, 18, 1C,
20, 24, 26, 28, 34, 38, 44,
4C, 54, 58, 5C, 60, 62, 74