Page 315 of 363

Check continuity and insulation from earth
and 12 volts of the wiring between :
2 masse
2
+AVC
4A2
Is the wiring in good condition?
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 2
CONT 2
B
no Repair the wiring if faulty.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 switching 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?
82-18
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