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

DIESEL INJECTION
Fault finding – Test13B
13B -241V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST1 Exhaust system check
Engine stopped: Check that the silencer outlet is
not blocked. Repair or replace the silencer, if
necessary.
Check the seal of the exhaust manifold on the
contact surface between the turbocharger and the
exhaust manifold.
Is the seal in order?
YES
Loosen the catalytic pre-converter on the
turbocharger 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
NORepair or replace the faulty part.
NOThe exhaust pipe is not the cause of the
fault. Continue with the engine fault finding
(see ALP5).
EDC16_V51_TEST1

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 -244V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST2
CONTINUED
Check the condition of the priming bulb, and that it is working properly.
Perform repairs if necessary and continue the test.
If the fault is still present with a low fuel level, check the consistency of the actual fuel level and that indicated on
the instrument panel.
–The transfer pump is supplied via a venturi valve located beneath it.
Check that the opening of the venturi (6 to 8 mm in diameter) is not blocked by dirt contained in the fuel tank.
Check the priming of the low pressure diesel circuit.
Check the conformity of the fuel used by applying test 10 Diesel fuel conformity check.
If the diesel fuel is not correct:
–Replace the diesel fuel.
–Change the diesel filter.
–Bleed the low and high pressure diesel circuit.
Low pressure circuit correct.
END OF 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 -247V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
Contamination of the grille
Damage to the electrical sensors
TEST4
CONTINUED
END OF 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