2009 RENAULT TWINGO engine

13B-209V6 MR-413-X44-13B000$190.mif
DIESEL INJECTION
Fault finding – Tests13B
DCM 1.2 Injection
Program No.: 4D
Vdiag No.: 48, 4C, 50,
54, 58, 5C
TEST 2 Electrical circuit check
Check the battery charge and that the alternator
is operating correctly (see 87B, Passenger
compartment connection unit for the New
Twingo or see 87G, Engine compartment
connection unit for Clio III, Modus, Mégane II,
Scénic II and Kangoo 2).
Is the charging circuit in good order? Carry out the necessary repairs.
Check the fuses.
Are the fuses correct? Carry out the necessary repairs.
Check that the injection locking relay is operating
correctly.
Is the injection locking relay working properly? Carry out the necessary repairs.
Check the engine earths.
Are the engine earths correct? Carry out the necessary repairs.
The electrical circuit is in good order.
NO
YES
NO
YES
NO
YES
NO
DCM1.2_V48_TEST2/DCM1.2_V4C_TEST2/DCM1.2_V50_TEST2/DCM1.2_V54_TEST2/DCM1.2_V58_TEST2/DCM1.2_V5C_TEST2

13B-214V6 MR-413-X44-13B000$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-215V6 MR-413-X44-13B000$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-216V6 MR-413-X44-13B000$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-217V6 MR-413-X44-13B000$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-219V6 MR-413-X44-13B000$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-220V6 MR-413-X44-13B000$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

13B-221V6 MR-413-X44-13B000$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 2
Visual inspection of the electrical connector of the solenoid valve
Switch off the engine.
Note:
The requested checks are only visual.
1. Check that the connector is correctly connected and locked.
2. Check the absence of damage to the electric wires where they leave the insulation.
Disconnect the connector to continue the checks.
3. Check the absence of thermal damage to the unit and mechanical damage to the lock.
4. Check the absence of deformations of the contacts (clips and tabs).
5. Check the sealing of the connector.
Do the visual inspections show any damage?
Refer to Technical Note 6015A, Repairing electrical wiring.
B
NO
YES
A
C