Page 319 of 363
v0406.0
IMMOBILISER
Fault finding - Fault Chart (petrol version) 82
AFTER REPAIRCarry out a conformity check.
Check that the immobiliser system is working correctly.
Erase fault memory G0**.
Fault Chart 4
CONT
A
yesReplace the injection computer.
Set the XR25 to pulse sensor mode (button
"G", input on terminal "Vin"). Ignition on,
check for pulses on track A6 of the 18 track
decoder unit connector (test with the
decoder unit and injection computer
connectors connected).
Are there pulses?
Replace the decoder unit or refer to the
Workshop Repair Manual, section "replacing
decoder and key kit".
no
82-22
Page 326 of 363

Check continuity and insulation from earth
and 12 volts of the wiring between :
2 earth
3
+AVC
4A2
Is the wiring in good condition ?
v0406.0
IMMOBILISER
Fault finding - Fault Chart (diesel version)82
AFTER REPAIRCarry out a conformity check.
Check that the immobiliser system is working correctly.
Erase fault memory G0**.
Fault Chart 2
CONT 2
B
no Repair the faulty wiring .decoder
bornierantenna
ring
yes
yesReplace the antenna ring .
yes
no Replace the decoder unit .
Check for voltage of + 12 volts on track A2 of
the decoder unit (decoder connector
disconnected and antenna ring connector
connected ).
Is this voltage present?
yes
Replace the key.
Switch off the ignition and wait until the
immobiliser warning light flashes
(immobiliser active ). Set the XR25 to pulse
sensor mode (button "G",
input on terminal "Vin").
When turning on the ignition again, check for
a pulse on track A2 of the decoder unit (test
with decoder unit and antenna ring
connectors connected).
Is there a pulse?
82-29
Page 327 of 363

Check the condition of the wiring between :
8A6
and the solenoid feed
(12 V and earth)
Is the wiring in good condition ?
solenoid valve
coded electronic
unit connector
v0406.0
IMMOBILISER
Fault finding - Fault Chart (diesel version)82
AFTER REPAIRCarry out a conformity check.
Check that the immobiliser system is working correctly.
Erase fault memory G0**.
None.NOTES
no Repair the wiring.
yes
no Replace the decoder unit .
decoder
bornier
yes
no
Replace the solenoid valve coded electronic
unit or refer to Workshop Repair Manual
section "changing the decoder and key kit".
Replace the decoder unit .
yes
XR25 connected , use fiche n° 56.
Carry out a mechanical check of the solenoid
valve .
-- Ignition off, enter G23*.
- Switch on the ignition. The valve should
open and close several times in 30 seconds
(listen).
Does the valve open and close for
approximately 30 seconds ?
Set the XR25 to pulse sensor mode (button
"G", input on terminal "Vin"). Ignition on,
check for pulses on track A6 of the decoder
unit connector (test with decoder unit and
solenoid valve coded electronic unit
connectors connected).
Are there any pulses?
Fault Chart 3IMMOBILISER WARNING LIGHT REMAINS ILLUMINATED FOR
LONGER THAN 30 CONSECUTIVE SECONDS , IGNITION ON
82-30
Page 332 of 363

v0406.0
IMMOBILISER
Fault finding - Checking conformity
82
If a fault bargraph illuminates, refer to the corresponding fault chart.NOTES
Order of
operationsFunction to be
checkedAction Bargraph Display and notes
5Configuration of the
computer -
petrol/dieselIlluminated if configured for a
diesel vehicle.
Extinguished if configured for
a petrol vehicle.
Command :
-G22*1* configuration for
petrol.
-G22*2* configuration
for diesel.
6 Forced protection
modeIlluminated only after entering
command G04* on the XR25.
Vehicle cannot be started as
long as
BG 9LH is illuminated.
7Immobiliser statusIlluminated if immobiliser
active : switch off the ignition
and wait approximately 10
seconds for the
BG 10LH to
illuminate.
Extinguished if immobiliser
inactive.
8Presence of the keyIlluminated when the ignition
is switched on if the key is
coded
(on condition that the vehicle
was protected before the
ignition was switched on,
immobiliser warning light
flashing).
NOTE : in normal operation,
bargraphs
8RH, 9 RH and 10 RH should be
illuminated together.
3
9
10
8
82-35
Page 336 of 363

v0406.0
IMMOBILISER
Fault finding - Aid
82
ADDITIONAL CHECKS
COMMAND MODES G--*
To use this function, enter G on the XR25 , then the number of the command followed by a star.
03Courtesy light control (Illuminates the courtesy light for 3 seconds).
04Forced protection mode : activates the immobiliser function even if the key is correct, which allows
starting prevention to be checked. Bargraph 9 left should illuminate.
This command must be entered when the ignition is off and the immobiliser function is active.
IMPORTANT: switching the ignition off cancels this command.
05Immobiliser warning light command (illuminates immobiliser warning light for 3 seconds ).
08Door unlock command (activates micromotors on unlock side for 3 seconds ).
09Door lock command (activates micromotors on lock side for 3 seconds ) .
13End of fault finding.
22Configuration :
-G 22 * 1 * = configuration for petrol vehicles (Bargraph 3RH should be extinguished).
-G 22 * 2 * = configuration for diesel vehicles (Bargraph 3RH should be illuminated).
23Forced solenoid valve test mode (used only on diesel vehicles).
Activates coded solenoid valve (opening/closing) for approximately 30 seconds (listen).
Note: - the decoder unit must be configured for a diesel vehicle
- Bargraph 8 left should be illuminated during the test.
32Programming of second PLIP key.
39Transponder line.
82-39
Page 337 of 363

v0406.0
IMMOBILISER
Fault finding - Aid
82
ADDITIONAL CHECKS
COMMAND MODES G--*
40Entering the security code (Bargraph 10 left should be illuminated and the ignition turned on).
This command mode can be used to enter the security code but does not permit decoding of the
injection computer or of the coded solenoid valve.
Enter the number of the vehicle’s security code on the XR25 and validate with "*".
If the code number is correct, "bon" is displayed on the XR25 and bargraph 10 left extinguishes.
If the code number is incorrect, "Fin" is displayed on the XR25 and bargraph 10 left remains
illuminated.
IMPORTANT: 3 attempts may be made to enter the code. If, after the 3rd attempt, the code
remains invalid,you must wait for approximately 15 minutes before trying again (the ignition must
be switched on and off again between each attempt.)
47Configuration of courtesy light timer :
-G 47 * 0 * = cancels courtesy light timer.
-G 47 * 1 * = activates courtesy light timer.
70Reading the Part Number (Part number of the decoder unit).
LIST OF THE VARIOUS #
43Type of button for electric door locks.
26Source of the last command for the opening elements:
1→Infrared remote control
2→Central door locking button
27Operation of the last command for the opening elements :
1→Unlock
2→Lock
65Test E2 Prom.
95Manufacturer (1 = Valéo, 2 = Sagem).
82-40
Page 340 of 363

1EC761.0
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding -Introduction
CONDITIONS FOR THE APPLICATION OF THE CHECKS DEFINED IN THIS FAULT FINDING
The checks defined in this fault finding should only be applied to a vehicle when the fault bargraph is
illuminated, indicating that the fault is present on the vehicle at the time of checking. Only a computer
fault will require replacement of the computer, whether the bargraph is permanently illuminated or
flashing .
If the fault is not present but simply memorised, the bargraph flashes and application of the checks
recommended in the fault finding section will not allow the origin of the fault to be found. In this case,
only a check of the wiring and the connection of the component in question must be carried out (it is
possible to test the wiring concerned in fault finding mode to try to obtain permanent illumination of the
bargraph ).
TOOLING REQUIRED FOR OPERATIONS ON THE AIRBAG AND SEAT BELT PRETENSIONER SYSTEMS :
- XR25 (with minimum XR25 cassette N° 16).
- XRBAG the updated N° 3 version (with the new measuring lead and its adaptors as well as the 30 track
adaptor for operations on the computer connector).
REMINDER:
When carrying out an operation on the airbag/seat belt pretensioner systems , it is essential to lock the
computer with the XR25 command G80* to avoid all risk of triggering at the wrong time (all firing lines
will be inhibited). This operating mode will be indicated by illumination of the warning light on the
instrument panel.
Never carry out any measuring operations on the airbag and pretensioners trigger lines with equipment
other than the XRBAG.
Before using a dummy ignition module, ensure that its resistance is between 1.8 and 2.5 ohms.
Only 30 track connector computers with airbag(s) function are able to be tested with the XR25.
Computers with the pretensioner function only must be checked with the XRBAG by following the checks
described in the fault finding section.
The ignition must be switched off, then on again to make the warning light extinguish following erasure
of the memory using the command G0**.
88
88-1
Page:
< prev 1-8 9-16 17-24