check engine RENAULT SCENIC 2009 J84 / 2.G Engine And Peripherals EDC16 Workshop Manual

DIESEL INJECTION
Fault finding – Test13B
13B -242V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST1
CONTINUED
Retighten the catalytic pre-converter.
Loosen the catalytic converter on the catalytic pre-
converter side. Place a wooden block between the
two parts.
Start the vehicle and check if the engine runs better.
Is the engine running normally?
YES
Retighten the catalytic converter.
Loosen or disconnect the intermediate chamber on
the catalytic converter side. Place a wooden block
between the two parts, if necessary.
Start the vehicle and check if the engine runs better.
Is the engine running normally?
YES
Retighten the intermediate chamber.
Loosen or disconnect the silencer on the
intermediate chamber side. Place a wooden block
between the two parts, if necessary.
Start the vehicle and check if the engine runs better.
Is the engine running normally?
YES
Replace the silencer.
END OF TEST1.
NOReplace the catalytic pre-converter.
NOReplace the catalytic converter.
NOReplace the intermediate chamber.

DIESEL INJECTION
Fault finding – Test13B
13B -243V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST2 Low pressure circuit check
Check the fuel filter:
–Conformity of the fuel filter (correct part number and RENAULT filter).
–Positioning and amount of clogging in the filter element.
–Positioning and condition of the seals.
–If there is metal swarf in the filter:
Replace the fuel filter, bleed the circuit and continue the fault finding procedure.
Supplying the injection system with fuel from an additional tank.
This operation aims to detect possible faults in the low pressure supply system of a vehicle by replacing it entirely
with an additional tank.
Mode:
–Disconnect the diesel fuel supply pipe at the fuel filter inlet and seal it with a plug.
–Connect a pipe to the fuel filter inlet and insert the other end into a clean container which is approximately 5 litres
in volume.
–Disconnect the diesel fuel return pipe at the pump return and injector leak-off junction and seal it with a plug.
–Fill the container with clean diesel fuel.
–Start the engine and let the system drain itself of its air (there must not be any air bubbles in the return pipe).
Is the customer complaint still present?
NO
Are the low pressure circuit connections in order and
in good condition?
NO
Carry out the necessary repairs.
YESIf the low pressure circuit is in order,
reconnect the various pipes making up the
low pressure circuit and repeat the fault
finding procedure in the fault finding chart
or for the fault that referred you to this test.
YES
EDC16_V51_TEST2

DIESEL INJECTION
Fault finding – Test13B
13B -245V3 MR-372-J84-13B250$900.mif
Checking the air filter.
If the engine is equipped accordingly, check:
–that the damper valve is open (AC012 Damper
valve, step B).
–the condition of the damper valve:
–the tightness of the mounting bolts,
–cracks in the damper valve.
Carry out the necessary repairs.
Replace the valve if necessary.
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST3 Checking the turbocharged air inlet circuit
Engine stopped: Check the low and high pressure
air circuit sealing (air leaks in or out, upstream or
downstream of the turbocharger).Check the parts that are abnormally greasy of the
circuit and reveal a lack of tightness.
Check:
–the condition and fitting of the ducts (foreign
bodies, clogged, disconnected, pinched, broken,
holed, cut, tightness of the mounting bolts, etc.).
–the presence, condition and fitting of the seals.
–the present and tightening of the clamps.
–The fitting of the turbocharging pressure sensor.
Carry out the necessary repairs.
Check:
–That the air filter unit inlet and outlet are not
blocked.
–The condition and fitting of the air filter unit
(disconnected, broken, perforated, etc.).
–The cleanliness, conformity and the absence of
deformation of the filter element.
–The air flow sensor: apply test 4.
Carry out the necessary repairs.
Check that there is no leak at the exhaust manifold,
in particular at the exhaust manifold/turbocharger
connection.
Check the exhaust system: apply test 1.
Carry out the necessary repairs.
Check the condition of the intercooler:
–clogging,
–leaks (vehicle stationary, stabilise the engine
speed between 3500 rpm and 4000 rpm and
check that there are no leaks).
Replace the intercooler if necessary.
END OF TEST3.
EDC16_V51_TEST3

DIESEL INJECTION
Fault finding – Test13B
13B -246V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
* OCR = Opening Cycle Ratio.
TEST4 Air flowmeter
POLLUTION OF THE GRILLES:
Visual inspection: remove the flowmeter. There should be no foreign bodies in the grilles (see illustration on the
next page).
Do not clean the grilles using compressed air or any other procedure: this damages the sensors and
creates variations from the values displayed on the CLIP tool.
Check the sealing of the air circuit upstream of the air flowmeter:
disconnected or pierced pipes and air filter unit, seals present.
Replace the air flowmeter if necessary and clean upstream of this, if necessary.
ELECTRICAL COMPONENT BREAKAGE:
Visual inspection:
remove the flow sensor: the components must not be broken (see picture on following page).
Replace the air flowmeter if necessary.
OXIDATION OF THE ELECTRICAL COMPONENTS:
Visual inspection:
dismantle the air flowmeter, there should not be any green deposits on the electrical components.
Replace the air flowmeter if necessary.
CLOGGING OF THE AIR FLOWMETER:
Test:
–Check the values for conformity:
* During the first 5 seconds after starting:
–Coolant temperature: 80˚C,
–Engine speed: idle speed (800 ± 50 rpm);
–Measure the air flow: 47 kg/h ± 10.
–OCR* EGR valve: between - 10% and 0%.
* After the starting phase:
–Coolant temperature: 80˚C,
–Engine speed: idle speed (800 ± 50 rpm);
–Air flow measurement: 30 kg/h ± 5%;
–EGR valve OCR*: between 10% and 40%.
–Refer to DF056 Air flow sensor circuit 2.def, for the air flow sensor checks.
Replace the air flowmeter if necessary.
EDC16_V51_TEST4

DIESEL INJECTION
Fault finding – Test13B
13B -248V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST5 Turbocharger control solenoid valve test
Start the engine and let it run at idle speed for 1 min.
Check the battery voltage.
If the value of PR071 Computer power supply voltage is greater than 13 V, continue the test.
If not, check the charging circuit, then carry out a road test to confirm that the fault has disappeared.
Checking the vacuum at the pressure regulator inlet
Let the engine idle.
Check the engine temperature using the CLIP parameter PR064 Coolant temperature.
Let the engine warm up until the temperature reaches 80˚C.
Disconnect the vacuum pipe from the pressure regulator end piece.
Connect a vacuum pressure gauge to the end of the disconnected pipe and put it in the vacuum measurement
position.
Accelerate rapidly by fully depressing the accelerator pedal and releasing it immediately.
The total duration of pressing and holding in the full load position must not exceed 1 second.
During this acceleration, the engine speed must reach a value between 3000 and 4000 rpm.
Repeat the operation three times.
Read the maximum vacuum displayed by the pressure gauge during the increase in speed, the decrease in speed
and after returning to idle speed.
Tolerance intervals to be respected for the vacuum value:
-1 bar < CORRECT vacuum value < - 0.6 bar
-0.6 bar < INCORRECT vacuum value < 0 bar
Does the vacuum at the turbocharger pressure regulator inlet, displayed by the pressure gauge, respect
the tolerance interval?
NO YES
The solenoid valve is correct.
If the customer complaint is Smoke from the
exhaust, apply ALP11 Smoke from the exhaust.
Otherwise, apply test 6 Turbocharger.
1
EDC16_V51_TEST5

DIESEL INJECTION
Fault finding – Test13B
13B -249V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST5
CONTINUED 1
Reconnect the vacuum pipe to the turbocharging pressure regulator
Check the vacuum at the solenoid valve outlet
Let the engine idle.
Disconnect the vacuum pipe from the solenoid valve outlet end piece.
This pipe connects the solenoid valve to the turbocharging pressure regulator.
Connect a vacuum pressure gauge to the solenoid valve outlet and put it in the vacuum measurement position.
Accelerate rapidly by fully depressing the accelerator pedal and releasing it immediately.
The total duration of pressing and holding in the full load position must not exceed 1 second.
During this acceleration, the engine speed must reach a value between 3000 and 4000 rpm.
Repeat the operation three times.
Read the maximum vacuum displayed by the pressure gauge during the increase in speed, the decrease in speed
and after returning to idle speed.
Tolerance intervals to be respected for the vacuum value:
-1 bar < CORRECT vacuum value < - 0.6 bar
-0.6 bar < INCORRECT vacuum value < 0 bar
Does the vacuum displayed at the solenoid valve outlet, by the pressure gauge respect the tolerance
interval?
NO YES
Reconnect the vacuum pipe to the turbocharging
pressure regulator Replace the vacuum pipe between the solenoid
valve and the turbocharger pressure regulator
(see MR 364 (Mégane II) or 370 (Scénic II),
Mechanical, 12B, Turbocharging).
1

DIESEL INJECTION
Fault finding – Test13B
13B -250V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST5
CONTINUED 2
Visual inspection of the solenoid valve electrical connector
Switch off the engine.
Note:
The requested checks are entirely visual.
1- Check that the connector is correctly connected and locked.
2- Check that the electric wires are not damaged where they leave the insulation.
Disconnect the connector to continue the checks.
3- Check that there is no heat damage to the unit and mechanical damage to the lock.
4- Check that the contacts (clips and tabs) are not deformed.
5- Check the sealing of the connector.
Do the visual inspections highlight any damage?
NO YES
If there is a repair procedure (see Technical
Note 6015A, Electrical wiring repair, Wiring:
Precautions for repair), repair the connector,
otherwise replace the wiring.
After repair, restart the test from the beginning.
C
1

DIESEL INJECTION
Fault finding – Test13B
13B -251V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST5
CONTINUED 3
Check the vacuum at the solenoid valve inlet
Let the engine idle.
Disconnect the vacuum pipe from the solenoid valve inlet end piece.
This pipe connects the vacuum pump to the turbocharger solenoid valve.
Connect a vacuum pressure gauge to the end of the disconnected pipe and put it in the vacuum
measurement position.
Read the vacuum displayed by the pressure gauge.
Tolerance intervals to be respected for the vacuum value:
-1 bar < CORRECT vacuum value < -0.85 bar
-0.85 bar < INCORRECT vacuum value < 0 bar
Does the vacuum displayed at the solenoid valve inlet by the pressure gauge respect the tolerance
interval?
NO YES
Replace the solenoid valve (see MR 364 (Mégane
II) or 370 (Scénic II), Mechanical, 12B,
Turbocharging).
Carry out the following operations.
–reconnect the vacuum pipe to the turbocharger solenoid valve.
–Check the vacuum pipe or pipes are connected correctly.
–visually inspect the condition of the vacuum pipes from the vacuum pump to the various components supplied.
Refer to the repair manual (see MR 364 (Mégane II) or 370 (Scénic II), Mechanical, 12B Turbocharging).
C
1

DIESEL INJECTION
Fault finding – Test13B
13B -252V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST6 Turbocharger
IMPORTANT
Perform these checks without removing the turbocharger and with the vehicle ignition switched off.
Check the turbocharger shaft
WARNING
Respect the following safety precautions:
–wear heat resistant gloves when the engine is hot,
–do not wear loose or baggy clothing and do not wear loose hanging jewellery,
–be aware that the cooling fan assembly may be triggered and pay attention to the operation of the accessories
belt or belts.
Note:
The turbocharger shaft is the shaft connecting the compressor wheel and the turbine wheel.
According to the vehicle type, maximum visual access will either be from above or from below.
Disconnect the air pipe located between the turbocharger and the air filter.
Wearing gloves, check the operation of the turbocharger shaft by turning the vanes manually without forcing.
Is there a point of resistance when the shaft is rotated?
Does the compressor wheel touch the turbocharger housing?
If for these 2 questions the response is NOIf YES for one of these 2 questions
Replace the turbocharger (see MR 364 (Mégane II) or
370 (Scénic II), Mechanical, 12B, Turbocharging,
Turbocharger: Removal - Refitting and Technical
Note 3938A, Broken turbocharger: Replacement
instructions).
EDC16_V51_TEST6

DIESEL INJECTION
Fault finding – Test13B
13B -257V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST8 Incorrect injector operation
Section A: Fuel regulation balance check for each injector (individual correction):
–In the CLIP diagnostic tool, choose the Fuel circuit subfunction.
–With the engine idling and the fuel temperature > 50˚C, display the flow correction values of each injector
(individual correction), i.e.:
–PR364 Cylinder no. 1 fuel flow correction.
–PR405 Cylinder no. 2 fuel flow correction.
–PR406 Cylinder no. 3 fuel flow correction.
–PR365 Cylinder no. 4 fuel flow correction.
A flow correction value greater than or equal to 5 mg/st absolute value can indicate an injector fault or cylinder
sealing fault.
–If this has not already been carried out, check the injector connections and wiring.
–Check the connections and wiring of the engine management computer to the injectors.
–Repair if necessary.
–Check the IMA injector codes, comparing the IMA codes on the injectors (the IMA codes must be read from left
to right) and the IMA codes read in the CLIP diagnostic tool.
–If the IMA codes are correct, continue the fault finding procedure,
–If not, change the incorrect IMA codes using command SC002 Enter injector codes (see Interpretation of
commands).
To confirm the repair, consult part B of this test.
CASE No. 1: If at least one of the values is greater than or equal to + 5 mg/st
–Check the valve clearance.
–Check the condition of the engine and the compressions (using the Clip diagnostic tool or a compression
gauge).
–If the compression test reveals a cylinder fault, carry out the necessary repairs.
–If the compression is correct, check the fitting conformity of the injector (see MR 364 (Mégane II) or 370 (Scénic
II), 13B, Diesel injection, Diesel injector: Removal - Refitting)
In particular, check that each injector has one compression washer.
Check the fuel regulation again for each injector (individual correction).
–If not, replace the injector and check for the sealing washer. Modify the IMA code using command SC002 Enter
injector codes (see Interpretation of commands).
–Apply Part B of this test to confirm the fault finding.
CASE No. 2: If at least one of the values is less than or equal to - 5 mg/st
–Check the valve clearance.
–Check the level and condition of the engine oil.
–Remove the injector with the largest correction.
–If there is diesel fuel contamination, check the condition of the cylinder concerned (cylinder, piston, valves).
Use an endoscope if possible.
–Only replace the removed injector, and modify the IMA code using command SC002 Enter injector codes
(see Interpretation of commands).
–Apply Part B of this test to confirm the fault finding.
EDC16_V51_TEST8