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

DIESEL INJECTION
Fault finding – Interpretation of commands13B
13B-211V3 MR-372-J84-13B250$765.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
SC003
SAVE COMPUTER DATA
NOTESThe data is saved before computer reprogramming or the computer is replaced.
On the CLIP tool, select the SC003 Save computer data.
If the following message appears:
"a saved file exists, do you want to overwrite this data?"
(this file corresponds to the last save carried out on the tool)
Select YES.
Confirming this command saves the following vehicle-specific data:
–injector codes,
–the EGR valve data programming;
–options available on the vehicle and managed by the computer (E.g. air conditioning).
This information will be saved on the CLIP tool.
After saving has finished, use the command SC001 Enter saved data to be able to set the new computer
parameters, after programming and reprogramming.
EDC16_V51_SC003

DIESEL INJECTION
Fault finding – Interpretation of commands13B
13B -212V3 MR-372-J84-13B250$765.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
SC036
REINITIALISE PROGRAMMING
NOTESThis command is used to reset the computer parameters according to the type of
operation or component repaired or replaced from the following list:
–the EGR valve,
–the damper valve.
Ignition on and engine stopped.
To run this command, select the SC036 Reinitialise programming scenario on the CLIP tool.
Procedure to be followed:
–on the main screen, select the component to reinitialise after an operation (removal - refitting or replacement
of component),
–select YES then OK to begin reinitialisation,
–select Finish on the Configuration done screen to return to the main screen,
–end of operation.
EDC16_V51_SC036

DIESEL INJECTION
Fault finding – Interpretation of commands13B
13B -213V3 MR-372-J84-13B250$765.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
RZ005
PROGRAMMING
NOTESThis command enables you to reinitialise the entire computer configuration according
to the vehicle.
Command RZ005 reconfigures the computer.
If the computer does not have any configuration data, use command RZ005 to enter the vehicle options:
–air conditioning,
–thermoplungers,
–cruise control/speed limiter.
These options are detected by the computer even if command RZ005 is not used.
The computer is configured as soon as the one of the vehicle's optional system components is operated.
EDC16_V51_RZ005

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 -216V3 MR-372-J84-13B250$765.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
AC004
TURBOCHARGING SOLENOID VALVE
NOTESThis command is used to check the turbocharging circuit.
This command checks that the turbocharger and the control circuit are working properly.
Introduction
1-Check the sealing of the high pressure air circuit:
Pipes not joined or pierced, pressure sensor disconnected or poorly fitted (seal present), intercooler pierced.
To test the intercooler: stabilise the engine speed between 3,500 and 4,000 rpm with the vehicle stopped and
check that there are no leaks.
Check the resistance of the turbocharging limitation solenoid valve between tracks 1 and 2.
Replace the solenoid valve if its resistance is not 15.4 Ω ± 0.7 at 20˚C.
Check the injection computer connections.
Check for continuity and make sure there is no interference resistance on the following connection:
Injection computer grey 32-track connector C,
track E1Track 1 turbocharging solenoid valve
Repair if necessary.
Check for the presence of + 12 V after relay on track 2 of the turbocharging solenoid valve.
2 - Turbocharger control circuit check
–With the engine stopped, make sure that the control rod is in the resting position.
–Start the engine and make sure that the control rod actuates to the upper stop.
–(when the engine is switched off, the control rod should return to the rest position)
–If the control rod does not move correctly, carry out the following checks:
1) Vacuum pressure command check:
–Disconnect the solenoid valve inlet hose and connect it to a pressure gauge.
–Start the engine and run it at a stable idle speed.
–If the vacuum pressure does not reach 800 mbar ± 100: check the vacuum pressure circuit from the vacuum
pump.
–Stop the engine, reconnect the inlet hoses and go to step no. 2.
2) Solenoid valve control check:
–Disconnect the solenoid valve outlet hose.
–Start the engine and run it at a stable idle speed.
–Place your hand on the solenoid valve and block the outlet union with your thumb.
–If you notice no solenoid valve vibration, check the operation of the computer output (step 5). Solenoid valve
operation check:
–Connect the pressure gauge to the solenoid valve outlet union.
–Start the engine and run it at a stable idle speed.
If the vacuum pressure does not reach 800 mbar ± 100, replace the solenoid valve.
EDC16_V51_AC004

DIESEL INJECTION
Fault finding – Interpretation of commands13B
13B -217V3 MR-372-J84-13B250$765.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
* Opening cyclic ratio signalAC004
CONTINUED
Turbocharger control circuit check (continued)
4) Turbocharger operation check:
a) Connect a vacuum pump to the hose connected to the turbocharger control diaphragm.
Apply a negative pressure of 800 ± 100 mbar:
If there is a leak, replace the turbocharger (diaphragm included).
b) Check the control rod movement and setting (see MR 364, Mechanics, 12B, Turbocharging).
If the control rod is sticking, replace the turbocharger.
c) Engine cold and stopped:
Remove the turbocharger inlet duct and check that the compressor turns freely on the axis.
d) If the fault persists:
Check that the exhaust manifold is not leaking.
Check that the exhaust is not blocked.
Carry out the necessary repairs.
5) Computer output stage check: (solenoid valve connected).
This operation can only be carried out if the checks indicated in step no. 2 are not conclusive.
Either with the voltmeter: Connect the voltmeter earth lead on track 2 of the solenoid valve and the positive
lead on track 1.
Clear any solenoid valve fault then run command AC004:
●The voltmeter should display ten cycles of two successive voltages ~ = battery voltage X opening cycle ratio*
in process.
that is: ~ 2.5 V (opening cyclic ratio* of 20%) then ~ 8.7 V (opening cyclic ratio* of 70%).
Or with the oscilloscope (at 5 V range/division and 1 ms/div time base): Connect the earth lead of the
oscilloscope to the battery earth and the positive test pin to track 2 of the solenoid valve.
Clear any solenoid valve faults, then run command AC004:
●the oscilloscope should display a square wave signal of 12.5 V in amplitude at a frequency of 140 Hz
(with an opening cyclic ratio* passing from ~ 20 to ~ 70%).
If the measurement is correct, replace the solenoid valve.
If the measurement does not show any control or continuous voltage, contact the Techline.

DIESEL INJECTION
Fault finding – Interpretation of commands13B
13B -218V3 MR-372-J84-13B250$765.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
* Opening cyclic ratio signalAC011
RAIL PRESSURE REGULATOR
NOTESThis command is used to check:
–the operation of the pressure regulator,
–and the high pressure injection circuit.
Step 1
Measure the pressure regulator resistance between tracks 1 and 2.
–Replace the regulator if its resistance is not approximately: 3 Ω ± 0.5 at 20˚C.
Check the continuity and absence of interference resistance of the following connections:
Injection computer brown 48-track connector B,
track M4track 2 of the rail pressure regulator connector
+ 12 V after relaytrack 1 of the rail pressure regulator connector
If, when running command AC011, you can hear a slight whistling noise and a crunching noise from the pressure
regulator, go to step 2. Otherwise, ensure that the computer output stage is functioning correctly:
Using a voltmeter:
With the solenoid valve connected, connect the voltmeter earth lead to track 2 of the fuel pressure solenoid valve
and the positive cable to track 1. Clear any fuel pressure solenoid valve faults, then run command AC011:
●The voltmeter should display two successive voltages: ~ 2.5 V for an opening cyclic ratio of 20% then ~ 8.75 V
for an opening cyclic ratio* of 70% (ten cycles).
Or using an oscilloscope (range 5 V/division and with time base 1 ms/division):
With the solenoid valve connected, connect the oscilloscope earth to the battery earth and the positive contact point
on track 2 of the fuel pressure solenoid valve; clear any fuel pressure solenoid valve faults then run command
AC011:
●the oscilloscope should display a square wave signal with an amplitude of 12.5 V at a frequency of 185 Hz (with
an OCR* passing from 20 to 70%).
If the measurement is correct, replace the regulator.
If the measurement is not correct, contact the Techline.
EDC16_V51_AC011

DIESEL INJECTION
Fault finding – Interpretation of commands13B
13B -219V3 MR-372-J84-13B250$765.mif
EDC16
PROGRAM No: C1
Vdiag No.: 51
AC011
CONTINUED
Step 2
In the event of rail overpressure:
Check the injectors are working:
see test 8 Incorrect injector operation.
Check that the rail pressure sensor is operating correctly:
Fault interpretation DF007 RAIL PRESSURE SENSOR CIRCUIT.
Carry out the necessary repairs.
If these checks do not reveal any faults, and if the fault is still present, replace the rail pressure sensor.
In the event of rail underpressure:
Check that the rail pressure sensor is operating correctly:
Fault interpretation DF007 RAIL PRESSURE SENSOR CIRCUIT.
Check the low pressure diesel circuit priming.
Check the conformity of the diesel filter connections.
Check the condition of the filter (clogging and water saturation).
Check there are no air bubbles between the filter and the high pressure pump.
Check the sealing of the high pressure and low pressure diesel circuit.
(odour and visual inspections): pump body, overpressure valve, pipes, rail and injector unions, injector wells.
Check the conformity of the seal fitting on the pressure regulator.
Check the injectors are working:
see test 8 Incorrect injector operation.
Carry out the necessary repairs.
If these checks do not reveal any faults, and if the fault is still present, replace the rail pressure sensor.

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