RENAULT SCENIC 2009 J84 / 2.G Engine And Peripherals EDC16 Workshop Manual

DIESEL INJECTION
Fault finding – Test13B
13B -251V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST5
CONTINUED 3
Check the vacuum at the solenoid valve inlet
Let the engine idle.
Disconnect the vacuum pipe from the solenoid valve inlet end piece.
This pipe connects the vacuum pump to the turbocharger solenoid valve.
Connect a vacuum pressure gauge to the end of the disconnected pipe and put it in the vacuum
measurement position.
Read the vacuum displayed by the pressure gauge.
Tolerance intervals to be respected for the vacuum value:
-1 bar < CORRECT vacuum value < -0.85 bar
-0.85 bar < INCORRECT vacuum value < 0 bar
Does the vacuum displayed at the solenoid valve inlet by the pressure gauge respect the tolerance
interval?
NO YES
Replace the solenoid valve (see MR 364 (Mégane
II) or 370 (Scénic II), Mechanical, 12B,
Turbocharging).
Carry out the following operations.
–reconnect the vacuum pipe to the turbocharger solenoid valve.
–Check the vacuum pipe or pipes are connected correctly.
–visually inspect the condition of the vacuum pipes from the vacuum pump to the various components supplied.
Refer to the repair manual (see MR 364 (Mégane II) or 370 (Scénic II), Mechanical, 12B Turbocharging).
C
1

DIESEL INJECTION
Fault finding – Test13B
13B -252V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST6 Turbocharger
IMPORTANT
Perform these checks without removing the turbocharger and with the vehicle ignition switched off.
Check the turbocharger shaft
WARNING
Respect the following safety precautions:
–wear heat resistant gloves when the engine is hot,
–do not wear loose or baggy clothing and do not wear loose hanging jewellery,
–be aware that the cooling fan assembly may be triggered and pay attention to the operation of the accessories
belt or belts.
Note:
The turbocharger shaft is the shaft connecting the compressor wheel and the turbine wheel.
According to the vehicle type, maximum visual access will either be from above or from below.
Disconnect the air pipe located between the turbocharger and the air filter.
Wearing gloves, check the operation of the turbocharger shaft by turning the vanes manually without forcing.
Is there a point of resistance when the shaft is rotated?
Does the compressor wheel touch the turbocharger housing?
If for these 2 questions the response is NOIf YES for one of these 2 questions
Replace the turbocharger (see MR 364 (Mégane II) or
370 (Scénic II), Mechanical, 12B, Turbocharging,
Turbocharger: Removal - Refitting and Technical
Note 3938A, Broken turbocharger: Replacement
instructions).
EDC16_V51_TEST6

DIESEL INJECTION
Fault finding – Test13B
13B -253V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST6
CONTINUED 1
Check the condition of the turbocharger vanes
Note:
Use a mirror and light to facilitate this check.
According to the vehicle type, maximum visual access will either be from above or from below.
Visually check that the compressor vanes are in good condition.
Are the vanes damaged or twisted?
NO YES
Replace the turbocharger (see MR 364 (Mégane II)
or 370 (Scénic II), Mechanical, 12B,
Turbocharging, Turbocharger: Removal -
Refitting and Technical Note 3938A, Broken
turbocharger: Replacement instructions).
What is the type of turbocharger?
Variable geometry
turbochargerTurbocharger with
fixed geometry

DIESEL INJECTION
Fault finding – Test13B
13B -254V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST6
CONTINUED 2
Checking the turbocharging pressure regulator for a turbocharger with variable geometry
Note:
The rod of the pressure regulator on a turbocharger with variable geometry is perpendicular to the turbocharger
shaft.
Turbochargers with variable geometry are controlled by a solenoid valve.
According to the vehicle type, maximum visual access will either be from above or from below.
Note:
If necessary, according to the vehicle type and the accessibility of the pressure regulator, connect the vacuum
pump to the end of the pressure regulator pipe at the solenoid valve outlet.
Using a manual vacuum pump, apply a vacuum on the turbocharging pressure regulator of approximately
650 mbar.
1- Check that the fitting is completely sealed.
2- Check that the control rod is resting against its stop.
3- Lock the vacuum device and check that the pressure variation is not greater than 100 mbar in 10 seconds.
4- Release the pressure and check that the control rod returns to its initial position without jerking.
Repeat the entire sequence three times.
Is the pressure regulator sealing and rod movement correct?
YES NO
The turbocharger is correct.
End of procedure.Replace the turbocharger (see MR 364 (Mégane II)
or 370 (Scénic II), Mechanical, 12B,
Turbocharging, Turbocharger: Removal -
Refitting and Technical Note 3938A, Broken
turbocharger: Replacement instructions).

DIESEL INJECTION
Fault finding – Test13B
13B -255V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST6
CONTINUED 3
Checking the turbocharging pressure regulator for a turbocharger with fixed geometry
Note:
The pressure regulator rod for a turbocharger with fixed geometry is line with the turbocharger shaft.
Turbochargers with fixed, regulated geometry are controlled by a solenoid valve.
According to the vehicle type, maximum visual access will either be from above or from below.
Note:
If necessary, according to the vehicle type and the accessibility of the pressure regulator, connect the vacuum
pump to the end of the pressure regulator pipe at the solenoid valve outlet.
Using a manual vacuum pump, apply a vacuum on the turbocharging pressure regulator of approximately
650 mbar.
1- Check that the fitting is correctly sealed.
2- Check that the control rod moved several millimetres.
3- Lock the vacuum device and check that the pressure variation is not greater than 100 mbar over 10 seconds.
4- Release the pressure and check that the control rod returns to its initial position without jerking.
Repeat the entire sequence three times.
Is the pressure regulator sealing and rod movement correct?
YES NO
The turbocharger is correct.
End of procedure.Replace the turbocharger (see MR 364 (Mégane II)
or 370 (Scénic II), Mechanical, 12B,
Turbocharging, Turbocharger: Removal -
Refitting and Technical Note 3938A, Broken
turbocharger: Replacement instructions).

DIESEL INJECTION
Fault finding – Test13B
13B -256V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
Deformed, twisted blade (“soft” foreign body)
Broken blades (“hard” foreign body)
TEST6
CONTINUED 4

DIESEL INJECTION
Fault finding – Test13B
13B -257V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST8 Incorrect injector operation
Section A: Fuel regulation balance check for each injector (individual correction):
–In the CLIP diagnostic tool, choose the Fuel circuit subfunction.
–With the engine idling and the fuel temperature > 50˚C, display the flow correction values of each injector
(individual correction), i.e.:
–PR364 Cylinder no. 1 fuel flow correction.
–PR405 Cylinder no. 2 fuel flow correction.
–PR406 Cylinder no. 3 fuel flow correction.
–PR365 Cylinder no. 4 fuel flow correction.
A flow correction value greater than or equal to 5 mg/st absolute value can indicate an injector fault or cylinder
sealing fault.
–If this has not already been carried out, check the injector connections and wiring.
–Check the connections and wiring of the engine management computer to the injectors.
–Repair if necessary.
–Check the IMA injector codes, comparing the IMA codes on the injectors (the IMA codes must be read from left
to right) and the IMA codes read in the CLIP diagnostic tool.
–If the IMA codes are correct, continue the fault finding procedure,
–If not, change the incorrect IMA codes using command SC002 Enter injector codes (see Interpretation of
commands).
To confirm the repair, consult part B of this test.
CASE No. 1: If at least one of the values is greater than or equal to + 5 mg/st
–Check the valve clearance.
–Check the condition of the engine and the compressions (using the Clip diagnostic tool or a compression
gauge).
–If the compression test reveals a cylinder fault, carry out the necessary repairs.
–If the compression is correct, check the fitting conformity of the injector (see MR 364 (Mégane II) or 370 (Scénic
II), 13B, Diesel injection, Diesel injector: Removal - Refitting)
In particular, check that each injector has one compression washer.
Check the fuel regulation again for each injector (individual correction).
–If not, replace the injector and check for the sealing washer. Modify the IMA code using command SC002 Enter
injector codes (see Interpretation of commands).
–Apply Part B of this test to confirm the fault finding.
CASE No. 2: If at least one of the values is less than or equal to - 5 mg/st
–Check the valve clearance.
–Check the level and condition of the engine oil.
–Remove the injector with the largest correction.
–If there is diesel fuel contamination, check the condition of the cylinder concerned (cylinder, piston, valves).
Use an endoscope if possible.
–Only replace the removed injector, and modify the IMA code using command SC002 Enter injector codes
(see Interpretation of commands).
–Apply Part B of this test to confirm the fault finding.
EDC16_V51_TEST8

DIESEL INJECTION
Fault finding – Test13B
13B -258V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST8
CONTINUED 1
CASE No. 3: If at least one of these values does not stabilise (20 seconds after starting)
–Check the low pressure circuit with test 2 Low pressure circuit check.
–Check the conformity of the fuel used, apply test 10 Diesel fuel conformity check.
–Apply Part B of this test to confirm the fault finding procedure
CASE No. 4: If the fuel flow correction values are all correct (between - 5 mg/st and + 5 mg/st)
Apply Part C of this test (Fuel return flow measurement).

DIESEL INJECTION
Fault finding – Test13B
13B -259V3 MR-372-J84-13B250$900.mif
TEST8
CONTINUED 2
IMPORTA NT
When removing and refitting an injector, follow the cleanliness guidelines and safety advice (seeMR 364 (Mégane
II) or 370 (Scénic II), Mechanical systems 13B, Diesel injector: Removal - R efitting).
Section B: Conf irmation of flow corre ction fault finding for each inje ctor (individua l c orre ction):
Cle ar the faultsandperform a test wi th theengine idlingfor at l east5minutes,fueltemperature>50˚C.
Ch eck th at n o fault a p p e a r s o n t heCLIPdiagnostic tooland that the corrective values do not reach±5mg/stroke
to confirm therepair.
Ifthecustomer complaint is still present and the fuel flow correction values are all between-5mg/stroke a nd + 5
mg/strok e,applyPartAFuel regulation balanc e che ck f or each injector (individual)of this test (CAS Eno. 4).
If one or more cylinders has injector flow correction values in excess of±5 mg/stroke,applyPart AFuel re gulation
ba lance c heck for each inj e c t or(individu a l ),asoneormoreadditional injectors may be defective.
Part C: Measuring fuelreturnflow
1-Fitting the tool:
Only carryout this pa rt if PR063 Fuel t empera ture is greater t han 50˚C (see step 2 of Part C of this test).
Remove the engine undertray
Disco nnect the entire fuel return pipe in accordance with the foll owing procedure (do not remove the clips):
–pressthe clip ,
–pullvertically on the end piece ( see arrow in i llustration below) of the fuel return pipe.
IMPORTANT
The end piece is fragile. Be careful not to break it by pulling it too hard. Replace all removed clips
EDC16
PROGRAM No.: C1
Vdiag No.: 51

DIESEL INJECTION
Fault finding – Test13B
13B -260V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
TEST8
CONTINUED 3
Fit the blanking plugs (B), from the kit (part number 77 01 208 229), on the end pieces of the fuel return pipe.
If Mot. 1760 is not fitted on the injectors immediately, place blanking plugs (A) on the injector fuel return openings.
On the pipes of Mot.1760 (see illustration 113195 above), remove the clips and the plugs from the end pieces (on
the right in the diagram) and leave the plugs (on the left in the diagram) in place.