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
1EC761.0
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of XR25 bargraphs
Bargraph 5 right hand side illuminated Fiche n° 49
Insulation of driver’s airbag line
XR25 aid :*25 : CC.1 : Short circuit at 12 volts
CC.0 : Short circuit to earth
5
Never carry out measurements on the trigger lines with equipment other than the
XRBAG.NOTES
Lock the computer using command G80* on the XR25.
Switch off the ignition and remove the two mounting bolts of the steering wheel cushion .
Check the condition of the trigger wire.
The XRBAG tool MUST be use for measuring insulation appropriate to the type of fault at point C2 of the
driver’s airbag circuit .
If the value obtained is not correct , replace the rotary switch under the steering wheel .
Reconnect the rotary switch under the steering wheel , disconnect the computer connector and fit the 30
track adaptor.
The XRBAG tool MUST be used for measuring insulation appropriate to the type of fault on the wire
marked B on the adaptor.
If the value obtained is not correct , check the 30 track connector connection (tracks 10 and 11) and
replace the wiring if necessary.
If the checks carried out have not proven the existence of a fault, replace the airbag computer (consult
the section "Aid" for this operation).
Reconnect the driver’s airbag ignition module and remount the steering wheel cushion.
Erase the computer memory using the command G0** then switch off the ignition.
Carry out another XR25 check and if there is no fault, unlock the computer using
command G81*.
Destroy the airbag cushion if it has been replaced (tool Elé. 1287).
AFTER REPAIR
88
88-11
1EC761.0
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of XR25 bargraphs
Bargraph 6 left hand side illuminated Fiche n° 49
Resistance on line 1 of the passenger’s airbag
XR25 aid :*06 : CC : Short circuit
CO : Open circuit
6
Never carry out measurements on the trigger lines with equipment other than the
XRBAG. On this vehicle "line 1" corresponds to the single trigger line of the
passenger’s airbag module .
NOTES
Lock the computer using command G80* on the XR25.
Switch off the ignition, disconnect the computer connector and fit the 30 track adaptor.
The XRBAG tool MUST be used for checking resistance on the wire marked C on the adaptor.
Is the value obtained correct?
Reconnect the computer and the ignition module of the passenger’s airbag module , then switch on the
ignition again.
Carry out an XR25 check.
If the kit still indicates the presence of a line 1 passenger’s airbag fault and and the checks carried out
show no evidence of a fault, replace the airbag computer (consult the section "Aid" for this operation).
If the value obtained is correct at wire C on the adaptor, check the condition of the
computer connection .YES
If the value obtained is not correct at wire C on the adaptor, check the 30 track
connector connection (tracks 6 and 7).NO
If the value remains incorrect, switch off the ignition and remove the dashboard to
gain access to the wiring of the passenger’s airbag module . Disconnect the ignition
module of the passenger’s airbag module, connect a dummy ignition module to the
ignition module , then use the XRBAG to measure the resistance on the wire marked C
on the adaptor.
If the value obtained is correct , replace the passenger’s airbag module .
If the value obtained is not correct, replace the airbag wiring.
Erase the computer memory using the command G0** then switch off the ignition.
Carry out another XR25 check and if there is no fault, unlock the computer using
command G81*.
Destroy the airbag cushion if it has been replaced (tool Elé. 1287).
AFTER REPAIR
88
88-12
1EC761.0
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of XR25 bargraphs
Erase the computer memory using the command G0** then switch off the ignition.
Carry out another XR25 check and if there is no fault, unlock the computer using
command G81*.
Destroy the airbag cushion if it has been replaced (tool Elé. 1287).
AFTER REPAIR
Bargraph 7 right hand side illuminated Fiche n° 49
Insulation of line 1 or 2 of the passenger’s airbag
XR25 aid :*27 : CC.1 : Short circuit at 12 volts
CC.0 : Short circuit to earth
7
Never carry out measurements on the trigger lines with equipment other than the
XRBAG. On this vehicle "line 1" corresponds to the single trigger line of the
passenger’s airbag module .
NOTES
Reconnect the computer and the ignition module of the passenger’s airbag module , then switch on the
ignition again.
Carry out an XR25 check.
If the kit still indicates the presence of a passenger’s airbag line fault and the checks carried out show no
evidence of a fault, replace the airbag computer (consult the section "Aid" for this operation).
It the value obtained is correct at wire C on the adaptor, check the condition of the
computer connection .YES
If the value obtained is not correct at the adaptor wire, check the 30 track connector
connection (tracks 6/7).NO
If the value remains incorrect , replace the airbag wiring.
Lock the computer using command G80* on the XR25.
Switch off the ignition, disconnect the computer connector and fit the 30 track adaptor.
The XRBAG tool MUST be use for measuring insulation appropriate to the type of fault on the wire
marked C on the adaptor.
Is the value obtained correct? ?
88
88-13
1EC761.0
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of XR25 bargraphs
Bargraph 9 right hand side illuminated Fiche n° 49
Insulation of pretensioner lines
XR25 aid :*29 : CC.1 : Short circuit at 12 volts
CC.0 : Short circuit to earth
9
Never carry out measurements on the trigger lines with equipment other than the
XRBAG.NOTES
Lock the computer using command G80* on the XR25.
Disconnect the ignition module of the driver’s pretensioner and connect a dummy ignition module to
the ignition module connectors.
Switch on the ignition and carry out an XR25 check.
If the fault has been memorised (fault no longer declared), check the condition of the seat wiring.
Replace the driver’s pretensioner if the wiring is not faulty.
Then carry out the same operation on the Passenger’s pretensioner (if not a driver’s side fault ).
The XRBAG tool MUST be used for measuring insulation appropriate to the type of fault at point C1 (seat
connector) of the driver’s pretensioner line.
If the value obtained is not correct , replace the wiring between points C1 and C3 (seat wiring).
Then carry out the same measurement on the passenger’s pretensioner line (if not a driver’s side fault ).
Disconnect the computer connector and fit the 30 track adaptor.
The XRBAG tool MUST be used for measuring insulation appropriate to the type of fault on the adaptor
wires marked D (Passenger ) and E (Driver ) .
If one of the values obtained is not correct, check the 30 track connector connection (tracks 3 / 4 for wire
D and 1/2 for wire E) and replace the wiring if necessary .
If the checks carried out have not proven the existence of a fault, replace the airbag computer (consult
the section "Aid" for this operation).
Reconnect the ignition modules of the seat belt pretensioners.
Erase the computer memory using the command G0** then switch off the ignition.
Carry out another XR25 check and if there is no fault, unlock the computer using
command G81*.
Destroy the pretensioner(s) if it has been replaced (tool Elé. 1287).
AFTER REPAIR
88
88-16
1EC761.0
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of XR25 bargraphs
Bargraph 10 left hand side illuminated Fiche n° 49
Short circuit or insulation from 12 volts on the warning light line 10
Use the 30 track XRBAG adaptor to operate on the computer connector .NOTES
If the checks carried out have not proven the existence of a fault, replace the airbag computer (consult
the section "Aid" for this operation).
Lock the computer using command G80* on the XR25.
Check the condition of the warning light bulb .
Ensure insulation
from 12 volts of the connection between the warning light and track 8 of the 30 track
connector.
Erase the computer memory using the command G0** then switch off the ignition
Carry out another XR25 check and if there is no fault, unlock the computer using
command G81*.AFTER REPAIR
88
88-17
1EC761.0
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of XR25 bargraphs
Bargraph 10 right hand side illuminated Fiche n° 49
Open circuit or insulation from earth on the warning light line10
Use the 30 track XRBAG adaptor to carry out operations on the computer
connector .NOTES
Warning light extinguished
after ignition
Lock the computer using command G80* on the XR25.
Check the condition of the warning light bulb.
Ensure the continuity of the connection between the warning light and track 8 of the 30 track
connector.
Ensure that 12 volts are reaching the warning light .
If the checks carried out have not proven the existence of a fault, disconnect the computer connector and
fit the 30 track XRBAG adaptor . Use the XRBAG in testing mode to check the operation of the warning
light on the instrument panel from the grey adaptor wire.
If it is possible to illuminate the warning light using the XRBAG, replace the airbag computer (consult
the section "Aid" for this operation).
If it is impossible to operate the warning light , repeat the preceding checks.
NoneNOTES Warning light illuminated
after ignition
Lock the computer using command G80* on the XR25.
Ensure the insulation from earth of the connection between the warning light and track 8 of the 30 track
connector .
If the checks carried out have not proven the existence of a fault, replace the airbag computer (consult
the section "Aid" for this operation).
None
Erase the computer memory using the command G0** then switch off the
ignition. Carry out another XR25 check and if there is no fault, unlock the
computer using command G81*.AFTER REPAIR
88
NOTES
88-18