RENAULT SCENIC 2010 J95 / 3.G Engine And Pheripherals DCM 1.2 Injection Workshop Manual

13B-211V10 MR-372-J84-13B100$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
TEST 5 Inlet circuit check
Check for air leaking in or out.
Is air leaking in or out? Carry out the necessary repairs.
Check the condition of the air filter.
Is the air filter correct?Replace the air filter (see MR 364 (Mégane II),
MR 370 (Scénic II), MR 385 (Modus), MR 392
(Clio III), MR 411 (New Twingo), MR 417
(Kangoo 2), Mechanical, 12A, Fuel mixture,
Air filter: Removal - Refitting).
Check that the inlet manifold is not obstructed
(clogged).
Is the inlet manifold blocked? Clean the inlet manifold.
Air system in good order.
YES
NO
NO
YES
YES
NO
DCM1.2_V48_TEST5/DCM1.2_V4C_TEST5/DCM1.2_V50_TEST5/DCM1.2_V54_TEST5/DCM1.2_V58_TEST5/DCM1.2_V5C_TEST5

13B-212V10 MR-372-J84-13B100$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
TEST 6 High pressure system check
NOTESSpecial note:
Certain faults make it impossible to carry out this test - deal with these first.
WARNING
Running the starter motor for more than 5 seconds is dangerous and serves no
useful purpose.
Preliminary checks:
–Check for the presence of fuel
–Check that there is no air in the low pressure circuit. Run TEST 1 Low pressure circuit check.
–Ensure that the correct fuel is being used. Run test 13 Diesel fuel conformity check.
The pump's capacity to produce high pressure can be checked by the following procedure:
–With the ignition off, disconnect the low pressure actuator from the pump (IMV brown connector)
and connect a test IMV or the adapter of 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.
–Run the test cold, PR064 "Coolant temperature" < 30
°C or equal to ambient temperature.
–Engage the starter for 5 seconds.
–Read the maximum rail pressure value PR038 Rail pressure during the test on the diagnostic tool.
A
DCM1.2_V48_TEST6/DCM1.2_V4C_TEST6/DCM1.2_V50_TEST6/DCM1.2_V54_TEST6/DCM1.2_V58_TEST6/DCM1.2_V5C_TEST6

13B-213V10 MR-372-J84-13B100$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
IMV = fuel flow actuator
TEST 6
CONTINUED
PR038 > 1050 bar?
–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 injector(s) (see MR
364 (Mégane II), MR 370 (Scénic II),
MR 385 (Modus), MR 392 (Clio III),
MR 411 (New Twingo), MR 417
(Kangoo 2), Mechanical, 13B, Diesel
injection, Diesel fuel injector:
Removal - Refitting).Replace the high pressure pump (see MR 364 (Mégane II), MR 370
(Scénic II), MR 385 (Modus), MR 392 (Clio III), MR 411
(New Twingo), MR 417 (Kangoo 2), Mechanical, 13B, Diesel
injection, High pressure pump: Removal - Refitting).
A
NOYES
NOYES

13B-214V10 MR-372-J84-13B100$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
TEST 7 High pressure circuit sealing check
NOTESSpecial note:
Certain faults make it impossible to carry out this test - deal with these first.
The command AC029 High pressure circuit sealing test enables a high pressure circuit sealing test to be
carried out when the engine is running.
This command can locate a leak in the high pressure circuit if a union is incorrectly fitted or screwed on. This test
does not identify a minor leak due to a union not being tightened to torque.
This command can only be used if the engine temperature is above 60
°C.
Watch out for any objects (tools or others) on the sides of the engine housing during the 4 accelerations
(possible vibrations).
Use command AC029 High-pressure circuit sealing test; the engine will automatically carry out a cycle of
four accelerations to increase the rail pressure and check for leaks in the high pressure circuit.
DCM1.2_V48_TEST7/DCM1.2_V4C_TEST7/DCM1.2_V50_TEST7/DCM1.2_V54_TEST7/DCM1.2_V58_TEST7/DCM1.2_V5C_TEST7

13B-215V10 MR-372-J84-13B100$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
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 High pressure circuit sealing also checks the return volume of each injector to detect
any leaks inside the injectors.
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 tubes of internal diameter 4 mm and approximately 50 cm long, and four graduated measuring
cylinders.
Procedure
–Check 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.
When all the preparations are complete, start the engine and leave it running:
30 secondsfor Euro 4 engines: K9K 766 - 768 (Clio III and Modus); K9K 724 (Mégane II
and Scénic II); K9K 740 -718 (New Twingo); K9K 800 - 802 - 812 (Kangoo 2).
Let it idle for 2 minutesfor Euro 3 type engines: K9K 750 - 752 (Clio III and Modus).
Note:
These time periods must be respected for the test results to be interpreted correctly.
–Run command AC029 High pressure circuit sealing check.
The engine will carry out automatically a cycle of four accelerations to increase the rail pressure and measure
internal injector leaks under these conditions.
–When the cycle has finished, run command AC029 High pressure circuit sealing test a second time to
obtain the correct return volume reading for each injector.
–Switch off the engine at the end of the cycle.
NOA
YES
DCM1.2_V48_TEST8/DCM1.2_V4C_TEST8/DCM1.2_V50_TEST8/DCM1.2_V54_TEST8/DCM1.2_V58_TEST8/DCM1.2_V5C_TEST8

13B-216V10 MR-372-J84-13B100$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
TEST 8
CONTINUED 1
At the end of the idling phase and these two cycles, the return volume of each injector must be:
45 ml (maximum)for Euro 4 type engines: K9K 766 - 768 (Clio III and Modus); K9K 724 (Mégane
II and Scénic II) K9K 740 - 718 (New Twingo); K9K 800 - 802 - 812 (Kangoo 2).
35 ml maximumfor Euro 3 type engines: K9K 750 - 752 (Clio III and Modus),
If the back-leakage volume of any of the injectors is more than the values above, only replace the faulty injector
(see MR 364 (Mégane II), MR 370 (Scénic II), MR 385 (Modus), MR 392 (Clio III), MR 411 (New Twingo),
MR 417 (Kangoo 2), Mechanical, 13B, Diesel injection, Diesel fuel 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,
–run the starter for 5 seconds,
–read the maximum rail pressure value PR038 Rail pressure during the test on the diagnostic tool.
If the rail pressure (PR038 Rail pressure) is lower 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 on the ignition again, and clear the injection faults using the diagnostic tool.
If the rail pressure (PR038) is greater than 1050 bar, the repair is correct.
End of TEST8.

13B-217V10 MR-372-J84-13B100$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
TEST 8
CONTINUED 2
If the engine does not start, only the static leakage can be measured, i.e. the leakage with the injector closed, not
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 Mot. 1711 adapter,
–disconnect the four injectors electrically,
–switch on the ignition and engage the starter for 5 seconds,
–measure the amount of diesel fuel in each pipe.
If the return leakage is greater than 10 cm, replace the injector(s) (see MR 364 (Mégane II), MR 370
(Scénic II), MR 385 (Modus), MR 392 (Clio III), MR 411 (New Twingo), MR 417 (Kangoo 2), Mechanical, 13B,
Diesel injection, Diesel fuel injector: Removal - Refitting).
Switch off the ignition, and reconnect the four injectors electrically.
Disconnect the test low pressure actuator 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.
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),
–disconnect the four injectors electrically,
–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,
–run the starter for 5 seconds,
–read the maximum rail pressure value PR038 Rail pressure during the test on the diagnostic tool.
If the rail pressure (PR038 Rail pressure) is lower 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.
End of TEST 8.
A

13B-218V10 MR-372-J84-13B100$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
TEST 9 Diesel filter check
Check the conformity of the diesel filter.
Is the diesel filter in order?Replace the air filter with an original part
(see MR 364 (Mégane II), MR 370
(Scénic II), MR 385 (Modus), MR 392
(Clio III), MR 411 (New Twingo), MR 417
(Kangoo 2), Mechanical, 13A, Fuel
mixture, Air filter: Removal - Refitting).
–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.
Are black particles present on 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
YESNO
DCM1.2_V48_TEST9/DCM1.2_V4C_TEST9/DCM1.2_V50_TEST9/DCM1.2_V54_TEST9/DCM1.2_V58_TEST9/DCM1.2_V5C_TEST9

13B-219V10 MR-372-J84-13B100$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
TEST 10 Turbocharger solenoid valve check
Note:
No turbocharger control solenoid valve present on the K9K 740 engine for New Twingo and the K9K 800
engine for Kangoo 2.
Checking the vacuum at the pressure regulator inlet
Run the engine at idle speed.
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 end piece of the pressure regulator.
Connect a vacuum pressure gauge to the end of the disconnected pipe and put it in the vacuum measurement
position.
Perform a quick acceleration by depressing the accelerator pedal completely and then 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 3 times.
Read the maximum vacuum posted by the pressure gauge during the increase and decrease in the speed and after
the return to idle speed.
Tolerance intervals for the vacuum are:
–1 bar < CORRECT vacuum value < - 0.6 bar
–0.6 bar < INCORRECT vacuum value < 0 bar
Is the vacuum at the turbocharging pressure regulator inlet displayed on the vacuum gauge within
the tolerance interval?
The solenoid valve is in order.
NOYES
A
DCM1.2_V48_TEST10/DCM1.2_V4C_TEST10/DCM1.2_V50_TEST10/DCM1.2_V54_TEST10/DCM1.2_V58_TEST10/DCM1.2_V5C_TEST10

13B-220V10 MR-372-J84-13B100$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
TEST 10
CONTINUED 1
Reconnect the vacuum pipe on the turbocharging pressure regulator
Checking the vacuum at the solenoid valve outlet
Leave the engine running at idle speed.
Disconnect the vacuum pipe from the end piece of the solenoid valve outlet.
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.
Perform a quick acceleration by depressing the accelerator pedal completely and then 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 3 times.
Read the maximum vacuum posted by the pressure gauge during the increase and decrease in the speed and after
the return to idle speed.
Tolerance intervals for the vacuum are:
–1 bar < CORRECT vacuum value < - 0.6 bar
–0.6 bar < INCORRECT vacuum value < 0 bar
Is the vacuum displayed by the pressure gauge at the solenoid valve outlet within the tolerance interval?
Reconnect the vacuum pipe on
the turbocharging pressure regulator Replace the vacuum pipe between the solenoid valve
and the turbocharging pressure regulator (see
Mechanical MR of the vehicle, 12B turbocharging).
A
NOYES
B