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

DIESEL INJECTION
Fault finding – Interpretation of commands13B
13B -214V3 MR-372-J84-13B250$765.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
RZ034
COMPUTER MEMORY
NOTESIMPORTANT
Only use this command if DF038 Computer is Present.
Ignition on and engine stopped.
Command RZ034 reinitialises the computer memory.
–With the ignition on:
–Use command RZ034.
–Switch off the ignition and wait for the message Communication lost with computer.
–Switch on the ignition again.
–Run the programming commands (see Configuration and programming)
–Use command SC036 Reinitialise programming and choose After injection computer replacement with
no save option,
–Enter the injector codes using command SC002 Enter injector codes (see Interpretation of commands),
–Switch off the ignition and wait for the message Communication lost with computer.
Perform a road test to reinitialise the parameters of the vehicle.
EDC16_V51_RZ034

DIESEL INJECTION
Fault finding – Interpretation of commands13B
13B -215V3 MR-372-J84-13B250$765.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
AC001
PREHEATING UNIT
NOTESThis command is only carried out if the fault DF025 Preheating unit fault finding
connection, or DF017 Preheating unit control circuit is present or stored and if no
other fault is present.
Refer to the Wiring diagrams Technical Note for the vehicle to locate the fuses and
relays concerned.
Connect the diagnostic tool and turn on the ignition.
With the preheating unit connected:
–connect the negative terminal of the voltmeter to track 8 of the preheating unit,
–connect the positive terminal of the voltmeter to the + 12 V battery,
–run command AC001 Preheating unit.
if the voltmeter does not indicate the battery voltage while the command is running (ten 1 second ON/OFF cycles):
1Check the condition of the preheating unit supply fuse F01 (70A).
Replace it if necessary.
2Check the following connections for continuity and the absence of interference resistance:
Injection computer connector C track E2 track 8 of the preheating unit connector
Injection computer connector C track A4 Track 3 of the preheating unit connector
Repair if necessary.
3Check the connections on the pre-postheating unit, heater plugs and injection computer.
Repair if necessary.
4Measure the resistance of the heater plugs. If this resistance is greater than 2 Ω replace the faulty plug(s).
5Check the continuity and absence of interference resistance between:
preheating unit track 1 cylinder 3 heater plug
preheating unit track 2 cylinder 1 heater plug
preheating unit track 6 cylinder 4 heater plug
preheating unit track 7 cylinder 2 heater plug.
6Then check for + 12 V supply on track 4 of the preheating relay connector.
If the fault is still present, replace the preheating unit.
EDC16_V51_AC001

DIESEL INJECTION
Fault finding – Interpretation of commands13B
13B -220V3 MR-372-J84-13B250$765.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
AC012
DAMPER VALVE
NOTESThis command allows you to check the operation of the damper valve.
–Measure the resistance of the damper valve solenoid valve between tracks 1 and 2.
Replace the solenoid valve if the resistance is not: 46 ± 3 Ω at + 25˚C.
–Check for continuity and for the absence of interference resistance on the following connections:
Injection computer, brown 48-track connector
B, track M1track 1 of the damper valve solenoid valve
connector
+ 12 V after relaytrack 2 of the damper valve solenoid valve
connector
A) Engine running at idle speed
Make sure that there is a pressure of ~ 900 mbar on the solenoid valve inlet hose.
Make the necessary repairs (pressure circuit conformity and seal).
B) With the vehicle ignition on, engine stopped
Make sure the damper valve is open.
If not, clean or replace the air vent unit.
Disconnect the solenoid valve inlet and outlet hoses,
Connect a vacuum pump to the inlet union and apply a pressure of ~900 mbar
If there is a leak, replace the solenoid valve.
Run command AC012.
Otherwise, with the solenoid valve connected, check operation of the computer output stage with a voltmeter:
Voltmeter earth cabletrack 1 of the solenoid valve
Voltmeter positive leadtrack 2 of the solenoid valve
Clear any solenoid valve faults,
Run command AC012.
The voltmeter should display ten ON-OFF cycles (8.75 V then 2.5 V).
If the measurement is correct, replace the solenoid valve.
If the measurement does not show any lights, contact the Techline.
C) Vehicle with ignition off
Connect a vacuum pump to the flap control diaphragm and apply a pressure of ~900 mbar:
If the diaphragm does not maintain the negative pressure, replace the air vent unit (the diaphragm cannot be
disconnected).
If the diaphragm maintains the vacuum and the flap does not operate, clean or replace the air vent unit.
If the diaphragm maintains the underpressure and the valve operates, then operate it several times to ensure
that there is no blockage.
Check for clogging of the air vent unit and its valve, and clean if necessary.
EDC16_V51_AC012

DIESEL INJECTION
Fault finding – Fault Finding Chart13B
13B -223V3 MR-372-J84-13B250$855.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51DIESEL INJECTION
Fault finding – Fault Finding Chart
ALP1 No dialogue with engine management computer
Try to establish dialogue with a computer on another vehicle to make sure that the diagnostic tool is not faulty.
Check the battery voltage and make the necessary adjustments to obtain a correct voltage (9.5 V < Battery
voltage < 17.5 V).
If the tool is not at fault, and dialogue cannot be established with any other computer on the same vehicle, the cause
could be a faulty computer interfering on the multiplex network.
disconnect the engine management computer.
try to establish dialogue with another computer.
if the fault is still present, reconnect the computer and proceed by elimination by successively disconnecting all the
following computers (according to wiring diagram and equipment): air conditioning, airbag, abs and esp, uch,
instrument panel, central communication unit, proximity sensor.
Try to establish dialogue after disconnecting each line:
if, after a disconnection, you manage to establish dialogue, perform the fault finding procedure for the relevant
computer.
perform fault finding on the multiplex network using the diagnostic tool.
Check for the presence and the condition of the injection fuses on the UPC, and/or the engine fuse box.
check the connection of the computer connectors and the condition of its connections.
Check the injection computer earths (quality, oxidation, earth bolts secure on the battery terminal).
Check that the supply to the computer is correct:
Earth on tracks H1, G4 and H4 of black 32-track connector A.
+ after ignition feed on track D1 of black 32 track connector A.
Check that the power supply to the diagnostic socket is correct:
+ before ignition feed on track 16.
+ after ignition feed on track 1.
Earth on tracks 4 and 5.
If dialogue has still not been established after these checks, contact the techline.
AFTER REPAIRCarry out a road test followed by a complete check with the diagnostic tool.
EDC16_V51_ALP1

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 -262V3 MR-372-J84-13B250$900.mif
EDC16
PROGRAM No.: C1
Vdiag No.: 51
2 - Checking the balance of the injector return flows:
3 - Removing the tool:
Disconnect the pipe from an injector:
–press on the injector clip,
–pull vertically on the end piece of the pipe of tool Mot.1760, placing a wipe on the end piece to prevent run-off.
Lift the end piece vertically so that the fuel contained in the pipes flows into the measuring cylinders of tool Mot.1760.
Remove the other 3 pipes using the same procedure.
TEST8
CONTINUED 5
Does the engine start? – Fit Mot. 1760 as shown in the tool fitting procedure.
–Start the vehicle or perform a 15 second starting sequence
(with ignition key).
–Measure the length travelled by the diesel fuel in the pipes of the
Mot. 1760.
–Replace the injector if the length travelled by the fuel is more than
10 cm compared with the average of the other three injectors. NO
YES
–The injector return pipes must be fitted to the injectors.
–Start the engine.
–Display the Fuel circuit sub-function in the CLIP diagnostic tool.
–Raise the temperature of the engine.
–Read the diesel fuel temperature with PR063 Fuel temperature until a diesel fuel temperature greater than
50˚C is reached
–Switch off the engine.
–Fit Mot. 1760 as shown in the installation procedure (see step 1).
–Check the value of the PR038 Rail pressure.
–Ask another Cotech to monitor the rise in fuel in the cans during engine turnover, as one of the cans will fill up
quickly if one of the injectors is leaking.
–Start the engine.
–Accelerate the engine until the pressure in the rail is 550 bar:
●if the engine speed is less than 3,000 rpm, maintain this pressure.
●if the engine speed is greater than 3000 rpm, reduce the engine speed until the rail pressure is 500 bar and
maintain this pressure.
–Maintain these conditions for one minute.
–Release the accelerator pedal and maintain the idle speed for 10 seconds.
–Switch off the engine.
–Measure the quantity of fuel contained in each measuring cylinder.
–Replace the injector if the quantity of fuel is more than 50 ml.
–Remove Mot. 1760 as shown in the tool removal procedure (see step 3).
IMPORTANT:
Use a cleaning cloth (part number 77 11 211 707) to absorb fuel run-off.