2011 RENAULT SCENIC Engine And Peripherals Workshop Manual

13B-153V4 MR-372-J84-13B000$120.mif
DIESEL INJECTION
Fault finding – Tests13B
DDCR INJECTION
Vdiag No.: 44, 48
TEST 6
CONTINUED
– Switch off the ignition, reconnect the electrical
connections to the four injectors and the low-
pressure actuator.
– Switch on the ignition again, and clear the
injection faults using the diagnostic tool.
– Check if there is no fuel leak in the high pressure
circuit. Run TEST 7 High pressure circuit
sealing check
– Check the conformity of the diesel filter. Run
TEST 9 Diesel filter check.
– Carry out fault finding on the injectors by
checking the return flow volume of the four
injectors, run TEST 8 Injector return flow.
–Is TEST 8 OK?The pump can supply the operating pressure.
Switch off the ignition, reconnect the electrical
connections
to the four injectors and the low pressure actuator.
Switch on the ignition again, and clear the injection
faults using the diagnostic tool.
Check if there is no fuel leak in the high pressure
circuit. Run TEST 7 High pressure circuit sealing
check.
Carry out fault finding on the injectors by checking the
return flow volume of the four injectors, run TEST 8
Injector return flow.
If TEST 8 is correct, the high pressure fuel circuit is
correct.
Replace the faulty injectors
(see MR 364 (Mégane II) or
MR 370 (Scénic II),
Mechanical, 13B, Diesel
injection, Diesel injector:
Removal - Refitting)Replace the high pressure pump (see MR 364 (Mégane II) or MR 370
(Scénic II), Mechanical, 13B, Diesel injection, High pressure pump:
Removal - Refitting).
A
NO
B
YES
NOYES

13B-154V4 MR-372-J84-13B000$120.mif
DIESEL INJECTION
Fault finding – Tests13B
DDCR INJECTION
Vdiag No.: 44, 48
The command AC029 High pressure circuit sealing test can locate a leak in the high pressure circuit if a union is
incorrectly fitted or screwed on. This command does not identify a union not tightened to torque.
This command can be used only if the engine temperature is greater than 60ºC.
Watch out for any objects (tool or others) on the sides of the engine housing during the 4 accelerations
(possible vibrations).
Run command AC029, the engine will automatically carry out a cycle of four accelerations to increase the rail
pressure. Check if there are leaks on the high pressure circuit.
TEST 7 High pressure circuit sealing check
NOTESSpecial note:
Certain faults make it impossible to carry out this test - deal with these first.
DDCR_V44_TEST07/DDCR_V48_TEST07

13B-155V4 MR-372-J84-13B000$120.mif
DIESEL INJECTION
Fault finding – Tests13B
DDCR INJECTION
Vdiag No.: 44, 48
TEST 8 Injector return flow
NOTESSpecial note:
Certain faults make it impossible to carry out this test - deal with these first.
Does the engine start?
Command AC029 also checks the return volume of each injector to detect an internal injector leak.
Be careful with any objects (tool or other) on the engine housing during the four cycles of the operation
(possible vibrations).
Tooling required
–Mot. 1711 Injector flow measuring kit.
Or: Use four pipes with internal diameter 4mm and approximately 50 cm in length, and four graduated measuring
cylinders.
Procedure
– Ensure that the engine coolant temperature is above 60°C,
– 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 tubes in place of the return pipes,
– put the other ends of the four pipes into four graduated measuring cylinders.
– After finishing these preparations, start the engine and let it idle for 2 minutes.
Note: This idle time must be respected for the test results to be interpreted correctly.
–Run command AC029 High pressure circuit sealing check
.The engine will automatically carry out a cycle of four accelerations to increase the rail pressure and measure the
internal injector leaks under these conditions.
–Once the cycle is complete, run command AC029 again to obtain a correct reading of the return volume of
each injector.
– Switch off the engine at the end of the cycle.
NOA
YES
DDCR_V44_TEST08/DDCR_V48_TEST08

13B-156V4 MR-372-J84-13B000$120.mif
DIESEL INJECTION
Fault finding – Tests13B
DDCR INJECTION
Vdiag No.: 44, 48
TEST 8
CONTINUED 1
At the end of both cycles, the return volume of each injector should be 35 ml maximum.
If the return volume of one of the injectors is greater than 35 ml, replace the faulty injector (see MR 364 (Mégane
II), MR 370 (Scénic II), Mechanical, 13B, Diesel injection, Diesel injector: Removal - Refitting).
Disconnect the 4 transparent pipes and reconnect the injector return circuit.
Carry out the following test to confirm the repair:
–With the ignition off, disconnect the low pressure actuator from the pump (brown IMV connector) and connect
the test adapter (test IMV, Mot. 1711),
– electrically disconnect the 4 injectors,
– switch on the ignition, connect the diagnostic tool and re-establish dialogue with the injection system,
– Go to the Main computer statuses and parameters screen,
– engage the starter for 5 seconds,
– read the rail pressure maximum value (PR038) on the diagnostic tool during the test.
If the rail pressure (PR038) is less than 1050 bar, run test 6 High pressure system check.
– Switch off the ignition, and reconnect the four injectors electrically,
– disconnect the test filling actuator (test IMV) and reconnect the low pressure actuator connector (IMV) to the
pump
Switch the ignition back on, and clear the injection faults using the diagnostic tool
If the rail pressure (PR038 Rail pressure) is greater than 1050 bar, the repair is correct
End of TEST 8.

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-158V4 MR-372-J84-13B000$120.mif
DIESEL INJECTION
Fault finding – Tests13B
DDCR INJECTION
Vdiag No.: 44, 48
TEST 8
CONTINUED 3
Carry out the following test to confirm the repair:
–With the ignition off, disconnect the low pressure actuator from the pump (brown IMV connector) and connect
the test adapter (test IMV, Mot. 1711),
– electrically disconnect the four injectors,
– switch on the ignition, connect the diagnostic tool and re-establish dialogue with the injection system,
– go to the Main computer statuses and parameters screen,
– engage the starter for 5 seconds,
– read the rail pressure maximum value (PR038) during the test on the diagnostic tool.
If the rail pressure (PR038) is less than 1050 bar, run test 6 High pressure system check.
– Switch off the ignition, and reconnect the four injectors electrically,
– disconnect the test IMV and reconnect the low-pressure actuator connector to the pump,
– switch on the ignition again, and clear the injection faults using the diagnostic tool.
If the rail pressure (PR038 Rail pressure) is greater than 1050 bar, the repair is correct
End of TEST 8.

13B-159V4 MR-372-J84-13B000$120.mif
DIESEL INJECTION
Fault finding – Tests13B
DDCR INJECTION
Vdiag No.: 44, 48
TEST 9 Diesel filter check
Check the conformity of the diesel filter. Replace the filter with an original part (see MR
364 (Mégane II) or MR 370 (Scénic II),
Mechanical, 13A, Fuel supply, Fuel filter:
Removal - Refitting) Is the diesel filter in order?
– Switch off the ignition and analyse the diesel fuel in the diesel filter.
– Disconnect the diesel supply and return hoses from the filter.
– Block the filter inlets and outlets straight away with appropriate plugs.
– Remove the filter from its holder and shake it firmly while holding the caps in place. Tap the edge of the filter
with a screwdriver handle to detach any contamination. Empty the contents of the filter into a glass container by
lifting a protective plug, then loosening and completely removing the bleed screw.
Is there a deposit of black particles at the bottom of the container?
Pass a magnet beneath the container to collect
all the metal particles. Take the magnet away
from the container.Diesel filter in good order.
Do the particles collected, using the magnet,
cover a surface area greater than 1 cm
2?
Replace the entire injection system Diesel filter in good order.
NO
YES
YESNO
YES
YES
DDCR_V44_TEST09/DDCR_V48_TEST09

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