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

13B-157V4 MR-372-J84-13B000$120.mif
DIESEL INJECTION
Fault finding – Tests13B
DDCR INJECTION
Vdiag No.: 44, 48
TEST 8
CONTINUED 2
If the engine does not start, only the static leak can be measured, that is the leak with the injector closed, not being
actuated and under high pressure.
Make sure that the ignition circuit is working correctly (minimum engine speed 200 rpm).
Tooling required
– Mot. 1711 Injector flow measuring kit.
Or: Use four tubes of internal diameter 4 mm and approximately 50 cm long and a test adapter (TEST IMV).
Procedure
– Switch off the ignition,
– disconnect the return pipes from the four injectors,
– cap the pump venturi tube to prevent the low-pressure circuit from depriming,
– connect the four transparent pipes in place of the return pipes (Mot. 1711),
– disconnect the low pressure actuator from the pump (brown IMV connector) and connect a test IMV or the
adapter of Mot. 1711,
– electrically disconnect the four injectors,
– switch on the ignition and engage the starter for 5 seconds,
– measure the amount of diesel fuel in each pipe.
Replace the injectors that have a leak return greater than 10 cm.
Switch off the ignition, and reconnect the four injectors electrically.
Disconnect the test IMV and reconnect the low-pressure actuator connector to the pump. Disconnect the
four transparent tubes and reconnect the injectors return circuit. Switch on the ignition again, and clear the injection
faults using the diagnostic tool.
A
NO

13B-160V4 MR-372-J84-13B000$120.mif
DIESEL INJECTION
Fault finding – Tests13B
DDCR INJECTION
Vdiag No.: 44, 48
TEST 11 Turbocharger air chain
Check for the air filter
Check the replacement interval of the air filter on the maintenance booklet.
Compare the part numbers of the air filter fitted to the vehicle and that of the air filter recommended by the
manufacturer.
Check the air filter direction of fitting.
Is the air filter fitted to the vehicle correct?
Check the condition of the air filter
Visually inspect the condition of the filtering section of the air
filter.
Is either the air filter or its seal damaged?
Is the air filter fouled (does it contain a lot of impurities)?Replace the air filter (see MR 364
(Mégane II) or 370 (Scénic II),
Mechanical, 12A, Fuel mixture, Air
filter, Removal - Refitting).
Low pressure circuit check
Note:
Depending on the vehicle type, the best visual access will be
either from above or from below.
Visually inspect the condition of the following components:
– fresh air inlet scoop on the front panel of the vehicle,
– air inlet pipe to the air filter,
– air pipe of the filter until the compressor inlet,
– mountings of the air flowmeter.
Is one of these components incorrect (disconnected,
cut, bent, pierced or kinked pipes)?Replace the defective parts (see MR
364 (Mégane II) or 370 (Scénic II),
Mechanical, 12B, Turbocharging).
YESNO
YES
NO
YES
A
NO
DDCR_V44_TEST11/DDCR_V48_TEST11

13B-162V4 MR-372-J84-13B000$120.mif
DIESEL INJECTION
Fault finding – Tests13B
DDCR INJECTION
Vdiag No.: 44, 48
TEST 13 Diesel fuel conformity check
WARNING
– During this operation, it is essential to:
– refrain from smoking or bringing incandescent objects close to the work area,
– guard against petrol splashes caused by the residual pressure in the pipes,
– wear safety goggles with side guards,
– wear leaktight gloves (Nitrile type).
IMPORTANT
– To avoid any corrosion or damage, protect the areas on which fuel is likely to run.
– To prevent impurities from entering the circuit, place protective plugs on all fuel circuit components
exposed to the open air.
Preparations:
Weigh an empty 1300 ml plastic cup (part no. 77 11 171 413) with its cover (part no. 77 11 171 416) using
electronic scales such as those used in body paint workshops (for example: PANDA, part no. 77 11 224 995).
Record the weight of the empty plastic cup.
This type of plastic cup is used to prepare paint.
Take a 1 litre fuel sample from the diesel filter outlet (see MR 364 (Mégane II) or 370 (Scénic II), Mechanical,
19C, Tank, Fuel tank: Draining), using a pneumatic transfer pump (part no. 634-200) and place it in the 1300 ml
plastic cup.
Cover the plastic cup with its cover and let it settle for approximately2 minutes.
Is the fuel cloudy or does it
separate into two parts?Presence of water in diesel fuel, the fuel is not compliant.
Drain the fuel circuit, including the tank (see MR 364 (Mégane) or
370 (Scénic), Mechanical, 19C, Tank, Fuel Tank: Draining).
YES
A
NO
DDCR_V44_TEST13/DDCR_V48_TEST13

13B-172
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V4 MR-372-J84-13B000$140.mif
DIESEL INJECTION
Fault finding – Fault finding charts13B
InjectionDDCR
Vdiag No.: 44, 48
ALP4 Starting difficult with warm engine
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Check that the fuel tank is correctly filled and that the fuel is correct by running TEST 13 Diesel fuel conformity
check.
Check the air inlet circuit by running TEST 5 Inlet circuit check.
Is the compression in order? Carry out the necessary repairs.
Is the timing set correctly? Carry out the necessary repairs.
Using the diagnostic tool, check that the injector codes (C2I) are correctly entered on the identification screen. If
not, configure the correct injector codes using command SC002 Enter injector codes.
Visually check the condition of the engine wiring harness.
Check the low pressure circuit by running TEST 1 Low pressure circuit check.
NO
YES
NO
YES
A
DDCR_V44_ALP04/DDCR_V48_ALP04

13B-174
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V4 MR-372-J84-13B000$140.mif
DIESEL INJECTION
Fault finding – Fault finding charts13B
InjectionDDCR
Vdiag No.: 44, 48
ALP5 Rough idle (pumping)
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Check that the fuel tank is correctly filled and that the fuel is correct by running TEST 13 Diesel fuel conformity
check.
Check the low pressure circuit by running TEST 1 Low pressure circuit check.
Using the diagnostic tool, check that the injector codes (C2I) are correctly entered on the identification screen. If
not, configure the correct injector codes using command SC002 Enter injector codes.
Visually check the condition of the engine wiring harness.
Visually check that there are no leaks on the high pressure circuit by running TEST 7 High pressure circuit
sealing check.
Is the compression in order? Carry out the necessary repairs.
Check the electrical conformity of the heater plugs (the resistance value of the heater plug must be less than 2 Ω).
Check the high pressure system by running TEST 6 High pressure system check.
Contact the Techline if the customer complaint is still present.
NO
YES
DDCR_V44_ALP05/DDCR_V48_ALP05

13B-179
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V4 MR-372-J84-13B000$140.mif
DIESEL INJECTION
Fault finding – Fault finding charts13B
InjectionDDCR
Vdiag No.: 44, 48
ALP9 Engine cut-out (stalling)
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Check that the fuel tank is correctly filled and that the fuel is correct by running TEST 13 Diesel fuel conformity
check.
Check the levels of engine oil and coolant.
Check that the engine has not sucked up its oil (engine racing).
Check the air inlet circuit by running TEST 5 Inlet circuit check.
Is the catalytic converter clogged or
damaged?Replace the catalytic converter (see MR 364
(Mégane II) or MR 370 (Scénic II), Mechanical, 19B,
Exhaust, Catalytic converter: Removal - Refitting).
Visually check the condition of the engine wiring harness.
Check the air inlet circuit by running TEST 2 Electrical circuit check.
Check the low pressure circuit by running TEST 1 Low pressure circuit check.
YES
NO
A
DDCR_V44_ALP09/DDCR_V48_ALP09

13B-181
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V4 MR-372-J84-13B000$140.mif
DIESEL INJECTION
Fault finding – Fault finding charts13B
InjectionDDCR
Vdiag No.: 44, 48
ALP10 Engine hesitation
NOTESOnly consult this customer complaint after a full check with the diagnostic tool.
See Feature, Function: Fuel supply management (timing, flow rate and pressure),
Flow capacity function (VLC) section.
Check that the fuel tank is correctly filled and that the fuel is correct by running TEST 13 Diesel fuel conformity
check.
Check the low pressure circuit by running TEST 1 Low pressure circuit check.
Using the diagnostic tool, check that the injector codes (C2I) are correctly entered on the identification screen. If
not, configure the correct injector codes using command SC002 Enter injector codes.
Is the engine wiring harness cut or pinched? Carry out the necessary repairs.
Is the compression in order? Carry out the necessary repairs.
Is the valve clearance set correctly? Carry out the necessary repairs.
YES
NO
NO
YES
NO
A
YES
DDCR_V44_ALP10/DDCR_V48_ALP10

13B-182
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V4 MR-372-J84-13B000$140.mif
DIESEL INJECTION
Fault finding – Fault finding charts13B
InjectionDDCR
Vdiag No.: 44, 48
ALP10
CONTINUED
Check the high pressure pump by running
TEST 6 High pressure system check.The vehicle has entered the "Flow capacity
function" program. This function is activated more
easily when: the external temperature is high, the
fuel level in the tank is at 1/4, the vehicle is laden
and if the vehicle speed is high. Is the "Flow capacity function"
programming active (ET563)?
Check the computer:
Check that the computer connectors are
properly locked.
Check the condition of the computer
connections (bent pin, signs of corrosion,
silicone, etc.).
If the connector(s) is faulty and if there is a
repair procedure (see Technical Note 6015A,
Repairing electrical wiring, Wiring:
Precautions for repair), repair the connector,
otherwise replace the wiring.Check the diesel filter.
Has the diesel fuel filter reached its full mileage?
Replace the diesel filter (see MR 364 (Mégane II)
or MR 370 (Scénic II), Mechanical, 13A, Fuel
supply, Fuel filter: Removal - Refitting).
Contact the Techline if the customer complaint is
still present.
Contact the Techline if the customer complaint
is still present.
A
YES
NO
YES

13B-186
AFTER REPAIRCarry out a road test, then check with the diagnostic tool.
V4 MR-372-J84-13B000$140.mif
DIESEL INJECTION
Fault finding – Fault finding charts13B
InjectionDDCR
Vdiag No.: 44, 48
ALP 13 Excessive consumption
NOTESOnly consult this customer complaint after a full check with the diagnostic tool.
Check that the fuel tank is correctly filled and that the fuel is correct by running TEST 13 Diesel fuel conformity
check.
Check the levels of engine oil and coolant.
Is the fuel temperature sensor leaking?Replace the fuel temperature sensor
(see MR 364 (Mégane II) or MR 370
(Scénic II), Mechanical, 13B, Diesel
injection, Rail pressure sensor:
Removal - Refitting).
Check the low pressure circuit by running TEST 1 Low pressure circuit check.
Check the injectors by running TEST 3 Injector check.
Visually check that there are no leaks on the high pressure circuit by running TEST 7 High pressure circuit
sealing check.
Check the air inlet circuit by running TEST 5 Inlet circuit check.
YES
NO
A
DDCR_V44_ALP13/DDCR_V48_ALP13