pressure RENAULT SCENIC 2012 J95 / 3.G Engine And Peripherals EDC16CP33 Workshop Manual

13B-435V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
SC035
CONTINUED 2
Check 3:
–Apply Test 10.
–Apply Test 3.
– Replace the high pressure pump.
Check 4:
– Replace the high pressure pump.
Check 5:
– Check the injector return flow and the injectors.
– Check the pressure regulator on the rail by running command AC225.
– Consult the Repair Manual depending on the results of the various checks (from 1 to 5), (see MR 395 (Laguna
II ph2), MR 364 (Mégane II ph2), MR 370 (Scénic II ph2), MR 405 (Espace IV ph2), MR 402 (Vel Satis ph2),
Mechanical, 13B, Diesel injection, Injector rail, Removal - Refitting).
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-439V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
AC004TURBOCHARGING SOLENOID VALVE
NOTESPerform this fault finding procedure:
– following interpretation of an unresolved fault or,
– following application of the interpretation of PR041 Turbocharging pressure or
– after a customer complaint (loss of power, smoke etc.).
Use the Wiring Diagram Technical Note, Laguna II ph2, Vel Satis ph2, Espace IV
ph2, Mégane II ph2, Scénic II ph2.
1. The following procedure is for checking that the turbocharger and its control circuit are working
properly.
Preliminary operation
Check the high pressure air circuit is sealed:
Apply Test 4 Turbocharged air inlet circuit check or Test 3 Low pressure circuit check.
Pipe not joined or pierced, pressure sensor disconnected or poorly fitted (seal present), exchanger pierced.
To test the exchanger: stabilise the engine speed between 3500 and 4000 rpm with the vehicle stopped and
check that there are no leaks.
Measure the resistance between connections3FB and 3MG of component1475.
If the resistance is not between 18 Ω and 22 Ω at + 23°C, replace the turbocharging solenoid valve.
Check the continuity of the following connection:
•3MG between the components 120 and 1475.
Check the + 12 V after relay supply of the turbocharging solenoid valve on the following connection:
•3FB of component 1475.
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.
EDC16CP33_V18_AC004 / EDC16CP33_V1C_AC004 / EDC16CP33_V54_AC004 / EDC16CP33_V20_AC004 / EDC16CP33_V58_AC004 /
EDC16CP33_V5C_AC004 / EDC16CP33_V24_AC004 / EDC16CP33_V04_AC004 / EDC16CP33_V08_AC004 / EDC16CP33_V44_AC004 /
EDC16CP33_V4C_AC004 / EDC16CP33_V34_AC004 / EDC16CP33_V38_AC004 / EDC16CP33_V74_AC004 / EDC16CP33_V28_AC004 /
EDC16CP33_V62_AC004 / EDC16CP33_V26_AC004 / EDC16CP33_V60_AC004
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-440V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
AC004
CONTINUED
Run command AC004; if a faint whistling noise is heard along with a clicking from the solenoid valve, go to STEP
2, otherwise check the operation of the computer output stage:
Vehicle under + after ignition feed, clear the faults displayed by the diagnostic tool.
With the voltmeter in the direct current position:
With the turbocharging solenoid valve connected, connect the voltmeter earth lead to connection 3MG of
component 1475 and the positive lead to connection 3FB of component 1475. Run command AC004; the
voltmeter must display four successive voltages between 2.2 V and 2.6 V.
If the measurement is not correct, contact the Techline.
2. turbocharger control circuit check
–Apply Test 7 Variable geometry turbocharger control.
– With the engine stopped, make sure that the control rod is in the resting position.
– Start the engine and make sure that the control rod actuates to the upper stop.
(when the engine stops, the control rod should return to the rest position).
If the control rod does not move correctly, carry out the following checks:
1. Check the control vacuum:
– Disconnect the solenoid valve inlet hose and connect it to a pressure gauge.
– Start the engine and run it at a stable idle speed.
If the vacuum does not reach a value between 0.250 bar and 0.550 bar, check the vacuum circuit from the
vacuum pump.
– Stop the engine, reconnect the inlet hose and move onto step no. 2.
2. Check the solenoid valve actuation:
– Disconnect the solenoid valve outlet hose.
– Start the engine and run it at a stable idle speed.
– Place your hand on the solenoid valve and block the outlet union with your thumb.
– If there is no perceptible vibration of the solenoid valve, contact the Techline.
3. Check the solenoid valve actuation:
– Connect the pressure gauge to the solenoid valve outlet union.
– Start the engine and run it at a stable idle speed.
If the vacuum does not reach a value between 0.250 bar and 0.550 bar, replace the solenoid valve.
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-451V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
AC103
CONTINUED
With the voltmeter in the direct current position:
With the EGR BYPASS solenoid valve connected, connect the voltmeter earth lead to connection3TP of
component1301 and the positive lead to connection3FB of component1301. Run command AC103, the
voltmeter should display four successive readings which are approximately equal to the 12 V battery voltage.
If the voltmeter indicates no control or a continuous voltage, contact the Techline.
If activation has run correctly, check the control vacuum:
– Disconnect the solenoid valve inlet hose and connect it to a pressure gauge.
– Start the engine and run it at a stable idle speed.
– If the vacuum does not reach a value between 0.250 bar and 0.550 bar, check the vacuum circuit from the
vacuum pump.
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-455V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
AC225RAIL PRESSURE REGULATOR
NOTESPerform this fault finding procedure:
– following interpretation of an unresolved fault
– following an inconsistency recorded in the parameters,
– following a customer complaint (starting problems, engine speed instability, injection
noise).
STEP 1
Check the continuity and absence of interference resistance on the following connection:
•3RG between the components 120 and 1198.
Check the + 12 V after relay supply to the rail pressure regulator (DRV) of the following connection:
•3FB of component 1198.
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.
Run command AC225, if you can hear a slight whistling noise and rattling from the pressure regulator, go to step
2, otherwise, check the operation of the computer output stage:
Vehicle under + after ignition feed, clear the faults displayed by the diagnostic tool.
With the voltmeter in the direct current position:
With the rail pressure regulator connected, connect the voltmeter earth lead to connection3RG of
component1198 and the positive lead to connection3FB of component1198. Run command AC225, the
voltmeter should display four successive voltages between 2 V and 2.4 V.
If the measurement is not correct, contact the Techline.
STEP 2
EDC16CP33_V18_AC225 / EDC16CP33_V1C_AC225 / EDC16CP33_V54_AC225 / EDC16CP33_V20_AC225 / EDC16CP33_V58_AC225 /
EDC16CP33_V5C_AC225 / EDC16CP33_V24_AC225 / EDC16CP33_V04_AC225 / EDC16CP33_V08_AC225 / EDC16CP33_V44_AC225 /
EDC16CP33_V4C_AC225 / EDC16CP33_V34_AC225 / EDC16CP33_V38_AC225 / EDC16CP33_V74_AC225 / EDC16CP33_V28_AC225 /
EDC16CP33_V62_AC225 / EDC16CP33_V26_AC225 / EDC16CP33_V60_AC225
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-457V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
AC226PUMP PRESSURE REGULATOR
NOTESPerform this fault finding procedure:
– following interpretation of an unresolved fault
– following an inconsistency recorded in the parameters,
– following a customer complaint (starting problems, engine speed instability, injection
noise).
STEP 1
Check the continuity and absence of interference resistance on the following connection:
•3HI between the components 120 and 1105.
Check the + 12 V after relay supply to the pump pressure regulator (MPROP) of the following connection:
•3FB of component 1105.
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.
Run command AC226, if you can hear a slight whistling noise and rattling from the pressure regulator, go to step
2, otherwise, ensure that the computer output stage is functioning correctly:
Vehicle under + after ignition feed, clear the faults displayed by the diagnostic tool.
With the voltmeter in the direct current position:
With the pump pressure regulator connected, connect the voltmeter earth lead to connection3HI of
component1105 and the positive lead to connection3FB of component1105. Run command AC226, the
voltmeter must display four successive voltages between 2 V and 2.4 V.
If the measurement is not correct, contact the Techline.
STEP 2
EDC16CP33_V18_AC226 / EDC16CP33_V1C_AC226 / EDC16CP33_V54_AC226 / EDC16CP33_V20_AC226 / EDC16CP33_V58_AC226 /
EDC16CP33_V5C_AC226 / EDC16CP33_V24_AC226 / EDC16CP33_V04_AC226 / EDC16CP33_V08_AC226 / EDC16CP33_V44_AC226 /
EDC16CP33_V4C_AC226 / EDC16CP33_V34_AC226 / EDC16CP33_V38_AC226 / EDC16CP33_V74_AC226 / EDC16CP33_V28_AC226 /
EDC16CP33_V62_AC226 / EDC16CP33_V26_AC226 / EDC16CP33_V60_AC226
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-459V12 MR-372-J84-13B300$150.mif
DIESEL INJECTION
Fault finding – Interpretation of commands13B
MT001TURBOCHARGING FUNCTION
NOTESPerform this fault finding procedure:
– following the interpretation of a fault concerning the air line which cannot be rectified,
– following an inconsistency found in the parameters concerning the air line
(turbocharging pressure or inlet air flow),
– following a customer complaint (starting faults, engine speed instability, lack of
power).
NOTESThis fault finding mode allows you to check dynamically certain mechanical components
on the engine.
To do this, the engine will run a 4-phase cycle which will enable the entire air line to be
checked: air filter, air flowmeter, duct (hoses), air refrigerant, turbocharging pressure
sensor, turbocharger, inlet manifold, exhaust manifold and exhaust pipe.
This test lasts for approximately 50 seconds.
Interpretation of test results:
The data recorded during this test is displayed in the DATA section.
- Identify any data which is outside the tolerance range and apply the different Monitool fault finding procedures
if necessary.
Introduction:
Engine parameters used during this test:
– PR055 Engine speed
– PR035 Atmospheric pressure
– PR059 Inlet air temperature
– PR064 Coolant temperature
–PR132 Air flow
– PR041 Turbocharging pressure
– PR051 EGR valve position feedback
EDC16CP33_V04_MT001 / EDC16CP33_V44_MT001
EDC16CP33
Program No.: C4
Vdiag No.: 04, 44
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.