fuel pressure RENAULT SCENIC 2011 J95 / 3.G Engine And Peripherals EDC16 Injection Owner's Manual

13B - 186
DIESEL INJECTION
Fault finding - Interpretation of parameters13B
V10 MR-372-J84-13B150$658.mif
EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C
PR063
FUEL TEMPERATURE
NOTESThere must be no present or stored faults.
NOTE
In the event of a relatively low outside temperature, the difference between the
fuel temperature and the engine temperature after cold starting may be greater
than 30 °C.
Check in the Fuel circuit tab in PR063 Fuel temperature that the value displayed is not the recovery value 100 °C.
If it is, check the fuel temperature sensor:
Check that the fuel temperature sensor is in good condition:
Repair if necessary.
Check the continuity and the absence of interference resistance on the following lines:
Brown 48-track connector B, track H2 Track 1 fuel temperature sensor
Grey 32-track connector C, track F1 Track 2 fuel temperature sensor
If the temperature read is inconsistent, check that the sensor follows the resistance as a function of temperature
calibration curve (NTC) correctly.
Replace the fuel pressure and temperature sensor if the resistance is not:
2,051 ± 123Ω at 25 °C
810 ± 47Ω at 50 °C
309 ± 17Ω at 80 °C
Replace the fuel temperature sensor if it is incorrect (an incorrect sensor is often the result of an electric shock).
AFTER REPAIRRepeat the conformity check from the start.
EDC16_V44_PR063/EDC16_V48_PR063/EDC16_V4C_PR063

13B - 199
DIESEL INJECTION
Fault finding - Interpretation of commands13B
V10 MR-372-J84-13B150$752.mif
EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C
* Opening Cyclic Ratio AC011
RAIL PRESSURE REGULATOR
NOTESThis command enables the operation of the injector high-pressure regulator circuit to
be checked.
Step 1
Measure the pressure regulator resistance between tracks 1 and 2.
– Replace the regulator if the resistance is not approximately: 3Ω ± 0.5 at 20 °C.
Check the continuity and the absence of interference resistance of the following connections:
Injection computer brown 48-track connectorB, trackM4 track 2 of the rail pressure regulator
connector.
+ 12 V after relaytrack 1 of the rail pressure regulator
connector.
If, when running command AC011, you can hear a slight whistling noise and the rattling from the regulator, go to
Step 2. Otherwise, ensure that the computer output is functioning correctly:
●Using a voltmeter:
With the solenoid valve connected, connect the voltmeter earth lead to track 2 of the fuel pressure solenoid valve
and the positive cable to track 1. Clear any fuel pressure solenoid valve faults, then run command AC011:
The voltmeter should display two successive voltages: ~ 2.5 V for an OCR at 20 % then ~ 8.75 V at an
OCR at 70 % (ten cycles)
●Or using an oscilloscope (range 5 V/division and with time base 1 ms/division):
With the solenoid valve connected, connect the earth of the oscilloscope to the battery earth and the positive test
pin to track 2 of the fuel pressure solenoid valve. Clear any fuel pressure solenoid valve faults then run command
AC011:
The oscilloscope should display a square-wave signal of 12.5 volts amplitude at a frequency of 185 Hz
(with an OCR going successively from 20 to 70 %).
– If the measurement is correct, replace the regulator.
– If the measurement is not correct, contact the Techline.
Step 2, next page
AFTER REPAIRRestart the conformity check from the beginning.
EDC16_V44_AC011/EDC16_V48_AC011/EDC16_V4C_AC011

13B-205
MR-372-J84-13B150$846.mif
V10
DIESEL INJECTION
Fault finding - Fault finding chart13B
ALP 2Starting faults
(or starting impossible)
NOTESBefore dealing with this customer complaint, check that there are no faults,
and he conformity (or otherwise) of the parameters and statuses using the
diagnostic tool.
If the customer complaint is not eliminated, perform the following checks.
Is starting difficult or impossible?
difficult
Check the engine earths.
Make sure that the engine speed reaches 250 rpm when the starter motor is operated, displayed in
the parameter screen.
Ensure that the correct fuel is being used. Run test 5 Diesel fuel conformity check.
Check the conformity of the fuel filter connections.
Ensure that the fuel filter is not saturated with water.
Check there are no air bubbles between the filter and the high pressure pump.
Check the operation of the preheating unit and heater plugs with command AC001 Preheating unit.
Check the condition of the air filter (clogging).
Check the seal of the high-pressure diesel circuit, pump, pipes, unions (visual checks + odours).
Check the position of the EGR valve: jamming or mechanical seizure.
Check the consistency of the signal from the engine coolant temperature sensor.
Check that the pressure regulator is working correctly (see the interpretation of command AC011 Rail
pressure regulator).
Check the operation of the injectors (too much return leakage, clogging, seizing) referring to Component
test, Test 1 Injector Test.
Check the compression balance, according to current consumption during the starting phase
(Compression test menu on the Clip tool).
In the event of imbalance, use a compression gauge to refine the reading (see the procedure in the Workshop
Repair Manual). After the operation, clear the faults caused by disconnecting the regulator and the heater
plugs.
impossible
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
EDC16_V44_ALP2 / EDC16_V48_ALP2 / EDC16_V4C_ALP2
EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C

13B-206
MR-372-J84-13B150$846.mif
V10
DIESEL INJECTION
Fault finding - Fault finding chart13B
ALP 2
CONTINUED
Refer to the engine
immobiliser fault finding
procedure in the UCH fault
finding.
Check the timing setting, and
the position of the high
pressure pump sprocket.
Check the cylinder
compressions.
Check the cylinder balance
using the Clip function,
Compression test physical
measurement icon.
ET003 not correct or
immobiliser warning
light permanently
illuminated
YESFrom the STATUS menu on your fault finding tool, check the conformity of
the immobiliser system: ET003 Engine immobiliser should be INACTIVE.
ET003 correct (Immobiliser code
warning light switched off)
Check the battery charge and the condition and tightness of the terminals.
Ensure that engine speed reaches 250 rpm when the starter motor is
operated. This is displayed on the parameter screen.
Check the engine earths.
Check the conformity of the inertia switch (according to equipment).
Check the presence and conformity of fuel in the tank. Run test 5 Diesel
fuel conformity check.
Check for the 12 V after relay feed on tracks G1 and M2 of connector B
on the engine management computer (via injection relay).
Check the engine fuses (and their mountings, wires and terminals).
test
Operate the starter:
Does the pressure increase in the rail:
Rail pressure = ~ 170 bar at ~ 250 rpm?
NO
Run a fault finding check on the regulator and high pressure pump by
applying the interpretation of command AC011 Rail pressure regulator.
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C

13B-207
MR-372-J84-13B150$846.mif
V10
DIESEL INJECTION
Fault finding - Fault finding chart13B
ALP 3 Injection noise
NOTESBefore dealing with this customer complaint, check that there are no faults,
and the conformity (or otherwise) of the parameters and statuses using the
diagnostic tool.
If the customer complaint is not eliminated, perform the following checks.
If the injection noise occurs after starting from cold:
Check the low pressure diesel circuit priming.
Check the fuel heater supply.
Check the operation of the preheating system.
Check that fuel and engine temperatures are consistent.
If the complaint is still present, check the rail pressure (Parameter menu) and apply the interpretation
of command AC011 Rail pressure regulator.
If the injection noise occurs at idle speed:
Check the condition of the injector connector and pressure regulator terminals.
Check the conformity of the air flow signal (consult parameter PR018 Estimated air flow).
Check the condition of the EGR valve (clogging, blocked, seized).
If the complaint is still present, perform the injector fault finding procedure with Test 1 Injector test.
Does the injection noise occur at all engine speeds?
Carry out fault finding on the injectors with Test 1 Injector Test.
Check the condition of the injector connector and pressure regulator terminals.
Ensure that the correct fuel is being used.
Check the conformity of the air flow signal (consult the interpretation of parameter PR132 Air flow).
If the customer complaint is still present, check the rail pressure (parameter menu) and apply the interpretation
of command AC011 Rail pressure regulator.
If the injection noise occurs at transitional speed:
If the engine races during gear changes, check the conformity of the clutch switch.
When changing gear during a road test, display parameter PR017 Fuel flow. if it varies without greatly affecting
the rail pressure, perform the fault finding procedure for AC011 Rail pressure regulator.
If the fault is still present, carry out a fault finding check on the injectors (seeTEST 1).
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
EDC16_V44_ALP3 / EDC16_V48_ALP3 / EDC16_V4C_ALP3EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C

13B-208
MR-372-J84-13B150$846.mif
V10
DIESEL INJECTION
Fault finding - Fault finding chart13B
ALP 4 Poor performance
NOTESBefore dealing with this customer complaint, check that there are no faults,
and the conformity (or otherwise) of the parameters and statuses using
the diagnostic tool.
If the customer complaint is not eliminated, perform the following checks.
IMPORTANT
In the event of the engine overheating above 11 0 ° C, the computer deliberately limits the fuel flow, and supplies
the fan assembly until the battery is completely discharged.
Is the poor performance accompanied by smoke?
YES
Check:
– That the EGR valve is not jammed in the open position.
– That the injectors are properly mounted (presence and conformity of the sealing washer).
Is the engine running on all cylinders?
NO
Check that the injectors are operating correctly. (See Test 1)
If the fault is still present
Check the conformity of the accelerator pedal position sensor, the brake pedal sensor, the atmospheric pressure
sensor and the EGR valve.
– Check the condition of the air filter.
– Check the consistency of the signal: from the flow sensor or the pressure/air temperature sensor, engine coolant
temperature sensor, fuel temperature sensor, engine speed.
No foreign bodies on the flowmeter grille (visual inspection only).
Check:
– That the diesel filter is not clogged.
– That there are no leaks in the low pressure and high pressure diesel circuits;
– that the air inlet circuit is complete (sealed and not obstructed),
– That the oil vapour rebreathing system is connected.
– The flow regulator (jammed/seized, consult the interpretation of command AC011 Rail pressure
regulator).
– The turbocharger control (jammed / seized), consult the interpretation of command
AC004Turbocharging solenoid valve,
– Check the engine compressions (cylinder compression balance with the Compression test function on
the CLIP tool).
– Check that the exhaust pipe is not blocked.
NO
YES
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
EDC16_V44_ALP4 / EDC16_V48_ALP4 / EDC16_V4C_ALP4
EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C

13B-209
MR-372-J84-13B150$846.mif
V10
DIESEL INJECTION
Fault finding - Fault finding chart13B
ALP 5 Irregular engine operation
NOTESBefore dealing with this customer complaint, check that there are no faults,
and the conformity (or otherwise) of the parameters and statuses using
the diagnostic tool.
If the customer complaint is not eliminated, perform the following checks.
If the engine bucks or races during gear changes, check the conformity of the clutch switch.
If the fault is still present:
– Ensure that the correct fuel is being used. Run test 5 Diesel fuel conformity check.
– Check the low pressure diesel circuit priming.
– Check the conformity of the low-pressure circuit connections.
– Check the conformity of the diesel filter and that it is not saturated with water (replace the filter if necessary).
– Check that there are no air bubbles between the filter and the high pressure pump.
– Check the conformity of the rail pressure (warm engine):
± 25 bar around the rail pressure value at idle speed, (the minimum to maximum variations in the rail
pressure at idle speed should not exceed 50 bar).
approximately 1350 bar under load with foot hard down on the accelerator.
In the event of a fault, apply the interpretation of command AC011 Rail pressure regulator.
Check the conformity of the air flow, apply the interpretation of parameter PR132 Air flow.
If the fault is still present:
– Check the injector operation using Test 1 Injector test.
– Check cylinder balancing using the CLIP function, Compression test physical measurement icon.
– Check engine compression where necessary.
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
EDC16_V44_ALP5 / EDC16_V48_ALP5 / EDC16_V4C_ALP5EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C

13B-210
MR-372-J84-13B150$846.mif
V10
DIESEL INJECTION
Fault finding - Fault finding chart13B
ALP 6 Rough idle
NOTESBefore dealing with this customer complaint, check that there are no faults,
and the conformity (or otherwise) of the parameters and statuses using
the diagnostic tool.
If the customer complaint is not eliminated, perform the following checks.
Check the seal and condition of the inlet circuit.
Check the low pressure circuit.
Check the engine parameters:
– Check the update of the engine management computer calibration (last calibration).
– Check the conformity of the IMA* codes (using the Identification screen on the Clip diagnostic tool).
– Check the charging circuit (see Technical Note 6014A Checking the charging circuit)
– To check the conformity of the engine speed signal, check:
– The wiring.
– The flywheel position and the condition of the flywheel teeth.
– The position and tightness of the engine speed sensor.
– Check the fuel flow correction at each individual injector, run test 1 Injector test.
Check the connections and wiring of the injectors.
Check the connections and wiring of the engine management computer to the injectors.
Repair if necessary.
Check the high pressure circuit (external leaks).
Check the engine timing (and the position of the high pressure pump sprocket).
Check the lower engine:
– Check the compressions using the Compression Test on the CLIP Technic diagnostic tool or the special tool.
– Check the engine mounts only if there is noise or excessive vibrations at idle speed.
If the checks are correct, contact the Techline.
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
EDC16_V44_ALP6 / EDC16_V48_ALP6 / EDC16_V4C_ALP6EDC16 INJECTION
Program No.: C1
Vdiag No: 44, 48 and 4C

13B-217
MR-372-J84-13B150$893.mif
V10
13B
DIESEL INJECTION
Fault finding - Tests
*: Technical Note 3419: Fault finding of the turbocharger for petrol and diesel enginesINJECTOR TESTTEST 1
AIR LINE AT THE TURBOCHARGER TEST 2
TURBOCHARGER CONTROL SOLENOID VALVE CHECKTEST 4
from
Technical
Note 3419*
TURBOCHARGERTEST 4
from
Technical
Note 3419
DIESEL FUEL CONFORMITY CHECK TEST 5
INCORRECT OPERATION OF THE OVERPRESSURE VALVE TEST 6
EDC16 INJECTION
Program No.: C1
Vdiag No.: 44, 48 and 4C
MR-372-J84-13B150$893.mif

13B-219
MR-372-J84-13B150$893.mif
V10
DIESEL INJECTION
Fault finding - Tests
EDC16 INJECTION
Program No.: C1
Vdiag No.: 44, 48 and 4C
13B
TEST 1
CONTINUED 1
CASE No. 3: If at least one of these values does not stabilise (20 seconds after starting).
– Check the low pressure circuit.
– Ensure that the correct fuel is being used.
–Run Part B of this test to confirm the fault finding procedure.
CASE No. 4: If the fuel flow correction values are all correct (between
- 5 mg/st and + 5 mg/st)
Run Part C of this test (Fuel return flow measurement).
IMPORTANT
For the removal - refitting of the injectors, observe the cleanliness and safety instructions (see MR 364
(Mégane II) or 370 (Scénic II), Mechanical, 13B, Diesel injection, Diesel injector: Removal - refitting).
Part B: Confirmation of flow correction fault finding for each injector (individual correction):
Clear the faults and perform a test with the engine idling for at least 5 minutes, fuel temperature > 50°C.
Check that no fault appears on the CLIP diagnostic tool and that the corrective values do not reach ± 5 mg/
stroke to confirm the repair.
If the customer complaint is still present and the fuel flow correction values are between -5 mg/st and
+5 mg/st, run Part A: Fuel regulation balance check for each injector (individual) of this test (Case no. 4).
If one or more cylinders has an injector flow correction value in excess of ± 5 mg/stroke, run Part A Fuel
regulation balance check for each injector (individual), as one or more additional injectors may be defective.