2012 RENAULT SCENIC test 3 low pressure circuit test

13B-492V12 MR-372-J84-13B300$180.mif
13B
*Technical Note 3419: Fault finding on the turbocharger for petrol and diesel engines. EXHAUST SYSTEM CHECK TEST1
RESOLVING MISFIRESTEST2
LOW PRESSURE CIRCUIT CHECK TEST3
TURBOCHARGED AIR INLET CIRCUIT CHECK TEST4
AIR FLOW SENSORTEST5
FUEL RETURN RAIL VALVE CHECK TEST6
VARIABLE GEOMETRY TURBOCHARGER CONTROLTEST 7: Apply
TEST 4 of
Technical Note
3419*
ROTATING PART OF TURBOCHARGERTEST 8: Apply
TEST 7 of
Technical Note
3419*
POOR INJECTOR OPERATION TEST10
TEMPERATURE UPSTREAM OF TURBINE TOO LOW TEST11
DIESEL FUEL CONFORMITY CHECK TEST12
DIESEL INJECTION
Fault finding – Test
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-497V12 MR-372-J84-13B300$180.mif
DIESEL INJECTION
Fault finding – Test13B
TEST3 Low pressure circuit check
Check the fuel filter:
– Conformity of the fuel filter (correct part number and RENAULT filter).
– Positioning and degree of clogging of the filter cartridge.
– 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 block it with a plug.
– Connect a pipe to the fuel filter inlet and insert the other end in a clean container with a capacity of approximately
5 litres.
– Disconnect the diesel fuel return pipe at the diesel temperature sensor (pump return and injector return join), and
block it using a plug.
– Connect a transparent pipe to the union of the diesel fuel temperature sensor, and insert the other end in the
container.
– 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?If the low pressure circuit is in order, reconnect the
various low pressure circuit pipes, and repeat the
fault finding chart procedure or the procedure for
the fault that referred you to this test.
Are the low pressure circuit connections in order
and in good condition?Carry out the necessary repairs.
YES
NO
NO
A
YES
EDC16CP33_V18_TEST3 / EDC16CP33_V1C_TEST3 / EDC16CP33_V54_TEST3 / EDC16CP33_V20_TEST3 / EDC16CP33_V58_TEST3 /
EDC16CP33_V5C_TEST3 / EDC16CP33_V24_TEST3 / EDC16CP33_V04_TEST3 / EDC16CP33_V08_TEST3 / EDC16CP33_V44_TEST3 /
EDC16CP33_V4C_TEST3 / EDC16CP33_V34_TEST3 / EDC16CP33_V38_TEST3 / EDC16CP33_V74_TEST3 / EDC16CP33_V28_TEST3 /
EDC16CP33_V62_TEST3 / EDC16CP33_V26_TEST3 / EDC16CP33_V60_TEST3
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-498V12 MR-372-J84-13B300$180.mif
DIESEL INJECTION
Fault finding – Test13B
TEST3
CONTINUED
Check the condition and operation of the priming bulb. Perform repairs if necessary and continue the test.
Check the condition of all the low pressure diesel pipes from the tank to the injection pump (in particular no pinching
of pipes).
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 pipe located underneath it.
Check that the opening of the venturi (6 mm 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 that the fuel tank is correctly filled and that the fuel is correct (see Test 12 Diesel fuel conformity check).
If the diesel fuel is not correct:
– Replace the fuel (diesel fuel).
– Replace the fuel filter (diesel fuel).
– Bleed the low and high pressure fuel circuit (diesel fuel).
Low pressure circuit correct.
A
YES
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-499V12 MR-372-J84-13B300$180.mif
DIESEL INJECTION
Fault finding – Test13B
TEST4 Turbocharged air inlet circuit check
Engine stopped: Check the sealing (leak or air intake) of the low and high pressure air circuit (before/after
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, clogged, not joined, kinked, broken, pierced, cut bodies, 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.
– The pipes and the take-off point between the air duct and the turbocharging sensor.
Carry out the necessary repairs.
Check the air filter.
Check:
– That the inlet and outlet of the air filter unit is not blocked.
– the condition and the assembly of the air filter unit (disconnected, broken, pierced …).
– The cleanliness, the conformity and the non-distortion of the filter element.
– The air flowmeter: run Test 5 Air flowmeter.
Carry out the necessary repairs
Check:
– the condition of the damper valve,
– the tightening of the mounting bolts,
– cracks in the damper valve.
Carry out the necessary repairs.
A
EDC16CP33_V18_TEST4 / EDC16CP33_V1C_TEST4 / EDC16CP33_V54_TEST4 / EDC16CP33_V20_TEST4 / EDC16CP33_V58_TEST4 /
EDC16CP33_V5C_TEST4 / EDC16CP33_V24_TEST4 / EDC16CP33_V04_TEST4 / EDC16CP33_V08_TEST4 / EDC16CP33_V44_TEST4 /
EDC16CP33_V4C_TEST4 / EDC16CP33_V34_TEST4 / EDC16CP33_V38_TEST4 / EDC16CP33_V74_TEST4 / EDC16CP33_V28_TEST4 /
EDC16CP33_V62_TEST4 / EDC16CP33_V26_TEST4 / EDC16CP33_V60_TEST4
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-504V12 MR-372-J84-13B300$180.mif
DIESEL INJECTION
Fault finding – Test13B
TEST10
CONTINUED 1
2. If at least one of these values is X < - 5 mg/stroke
– Check the valve clearance.
– Check the level and condition of the engine oil.
– Remove the injector with the largest adjustment.
– If there is contamination via the diesel, check the condition of the cylinder concerned (cylinder, piston, valves).
– Replace the injector* concerned.
– See paragraph Part C, for confirmation of the fault finding.
3. If at least one of these values does not stabilise (20 seconds after starting):
– Check the low pressure circuit using Test 3 Low pressure circuit test.
– Check the fuel is correct by carrying out Test 12 Diesel fuel conformity check.
See paragraph Part C of Test 10, for confirmation of the fault finding.
After replacing an injector, follow the injector code programming procedure (see Replacement of components),
run SC036 Reinitialise programming and select the number of the injector replaced.
IMPORTANT:
When removing / refitting injectors, follow the cleanliness and safety instructions (see MR 395 (Laguna II ph2),
402 (Vel Satis), 405 (Espace IV Ph2), 364 (Megane II ph2), 370 (Scenic II ph2) Mechanical, 13B, Diesel
injection, Diesel injectors: 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