Page 324 of 363

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 2IGNITION ON, IMMOBILISER WARNING LIGHT FLASHES
PERMANENTLY (impossible to start)
None.NOTES
no See Fault Chart 1.
Switch on the ignition.
Connect the XR25. Use fiche n° 56, selector
on S8. Enter D56.
Is there communication between the XR25
and the decoder unit?
yes
no Replace the fuse if necessary.
yes
Check the condition of the antenna ring.
Is the fuse in good condition?
no
Refer to the chart for bargraph 4RH in the
section "Fault finding -Interpretation of
XR25 bargraphs ".
yes
no Carry out the programming operation if the
unit is new , otherwise, replace the decoder
unit .
Switch on the ignition and check that
bargraph 4RH is illuminated .
Is Bargraph 4RH illuminated?
yes
A
Switch on the ignition and check that
bargraph 19RH is extinguished .
Is Bargraph 19RH extinguished ?
82-27
Page 329 of 363

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 5IMMOBILISER WARNING LIGHT REMAINS PERMANENTLY ILLUMINATED (even
when ignition turned off ) OR REMAINS PERMANENTLY EXTINGUISHED
Check that decoder unit programming has been properly carried out.NOTES
no Replace the fuse.
yes
Check the condition of the +before ignition
fuse.
Is the fuse in good condition?
no Repair the wiring.
yes
Check continuity and insulation from earth
of the wiring between track A5 of the 18
track decoder unit connector and the
instrument panel .
Is the wiring in good condition?
Carry out the following tests to determine the
faulty component :
- If the immobiliser warning light is
illuminated , disconnect the 18 track
decoder unit connector and check that
the immobiliser warning light
extinguishes,
- If the immobiliser warning light is
extinguished , connect track A5 of the
decoder unit connector to a vehicle earth
and check that the immobiliser warning
light illuminates.
Does the immobiliser warning light
illuminate correctly during the test?
no Replace the instrument panel .
Replace the decoder unit .
yes
yes
Check that bargraph 5LH is extinguished .
Is bargraph 5LH extinguished ?no
Refer to the chart for bargraph 5LH in the
section "Fault finding - Interpretation of
XR25 bargraphs "
82-32
Page 346 of 363

1EC761.0
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of XR25 bargraphs
Bargraph 1 right hand side extinguished Fiche n° 49
Code present1
The computers which only control the operation of the seat belt pretensioners do
not have XR25 fault finding (check to be carried out with XRBAG).
When communication is established, deal with any illuminated fault bargraphs.AFTER REPAIR NOTES
Check the presence and condition of the airbag fuse .
Check the condition of the computer connector and the condition of the connections.
Check that the computer is correctly fed :
- Disconnect the airbag computer and fit the 30 track adaptor of the XRBAG.
- Check and ensure the presence + after ignition feed between the terminals marked
Earth and +after ignition feed.
Check that the diagnostic socket is correctly fed :
-+ Before ignition feed on track 16.
-Earth on track 5.
Check the continuity and insulation of the lines of the diagnostic socket / airbag computer connection:
- Between the terminal marked L and track 15 of the diagnostic socket .
- Between the terminal marked K and track 7 of the diagnostic socket .
If dialogue is still not established after these various checks, replace the airbag computer (consult the
section on "Aid" for this operation).
Ensure that the XR25 is not the cause of the fault by trying to communicate with the computer on
another vehicle .
Check that the ISO selector is in position S8, that the latest XR25 cassette and the correct access code are
being used.
Check the battery voltage and carry out the operations necessary to obtain the correct voltage (10.5 volts
< U battery< 16 volts).
88
88-7
Page 348 of 363

1EC761.0
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of XR25 bargraphs
Bargraph 2 left hand side illuminated Fiche n° 49
Voltage supply
XR25 aid:*02 : 1.dEF : Voltage too low
2.dEF : Voltage too high
3.dEF : Too many micro-breaks
dEF : Cumulative between faults 1.dEF/2.dEF/3.dEF
2
Use the 30 track adaptor of the XRBAG to operate on the computer connector .
Erase the computer memory using the command G0**. AFTER REPAIR NOTES
Carry out the operations necessary to obtain the correct computer power supply :
10.5 volts ± 0.1 < correct voltage< 16 volts ± 0.1.
- Check the battery charge.
- Check the charge circuit.
- Check the tightness and condition of the battery terminals.
- Check the computer earth .
NoneNOTES I.dEF - 2.dEF
For a micro-break fault, check the computer power supply lines :
- Condition of the computer connections.
- Condition of computer earth (track 9 of the 30 track connector towards front right pillar earth).
- Condition / position of the fuse.
- Condition and tightening of battery terminals.
NoneNOTES 3.dEF
The dEF display on the kit indicates the minimum memorisation of 2 of the 3 faults declared by the
display
1.dEF, 2.dEF and 3.dEF (bargraph flashing ).
Operation:
- Check the battery charge.
- Check the charge circuit.
- Check the tightness and condition of the battery terminals.
- Condition of the computer connections.
- Check the computer earth .
- Condition / position of the fuse.
NoneNOTES dEF
88
88-9