airbag off RENAULT KANGOO 1997 KC / 1.G Foult Finding - Injection Workshop Manual

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

1EC761.0
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of XR25 bargraphs
Bargraph 5 left hand side illuminated Fiche n° 49
Resistance on the driver’s airbag line
XR25 aid :*05 : CC : Short-circuit
CO : Open circuit
5
Never carry out measurements on the trigger lines with equipment other than the
XRBAG.NOTES
Lock the computer with the command G80* on the XR25.
Switch off the ignition and remove the two mounting bolts of the steering wheel cushion.
Check that it is correctly connected.
Disconnect the steering wheel cushion and connect a dummy ignition module to the ignition module
connector . Switch on the ignition and carry out an XR25 check.
Replace the airbag cushion if the fault has been memorised (fault no longer declared).
The XRBAG tool MUST be used for checking resistance at point C2 of the driver’s airbag circuit.
If the value obtained is not correct, replace the rotary switch below the steering wheel.
Reconnect the rotary switch below the steering wheel, disconnect the computer connector and fit the 30
track adaptor.
The XRBAG tool MUST be used for checking resistance 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.
With the ignition switched off, disconnect, then reconnect the connector for the rotary switch below the
steering wheel.
Operate on the connection if bargraph 5 left hand side begins to flash .
Erase the computer memory using the command G0** then switch off the ignition.
carry out another check with the XR25 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
88-10

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 8 left hand side illuminated Fiche n° 49
Resistance on driver’s pretensioner line
XR25 aid :*08 : CC : Short circuit
CO : Open circuit
8
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 check ignition module of the driver’s pretensioner is correctly connected.
Disconnect the ignition module of the driver’s pretensioner and connect a dummy ignition module to
the ignition module connector.
Switch on the ignition and carry out an XR25 check.
Replace the driver’s pretensioner if the fault has been memorised (fault no longer declared).
Disconnect the computer connector and fit the 30 track adaptor.
The XRBAG tool MUST be used for checking resistance on the wire marked E of the adaptor .
If the value obtained is not correct , check the 30 track connector connection (tracks 1 and 2) 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 module of the driver’s pretensioner .
The XRBAG tool MUST be used for checking resistance at point C1 (seat connector) on the line of the
driver’s pretensioner .
If the value obtained is not correct , replace the wiring between points C1 and C3 (seat 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 pretensioner if it has been replaced (tool Elé. 1287).
AFTER REPAIR
88
88-14

1EC761.0
AIRBAG - SEAT BELT PRETENSIONERS
Fault finding - Interpretation of XR25 bargraphs
Bargraph 8 right hand side illuminated Fiche n° 49
Resistance on the passenger’s pretensioner line
XR25 aid :*28 : CC : Short circuit
CO : Open circuit
8
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 check that the ignition module of the passenger’s pretensioner is correctly
connected.
Disconnect the ignition module of the passenger’s pretensioner and connect a dummy ignition module
to the ignition module connector.
Switch on the ignition and carry out an XR25 check.
Replace the passenger’s pretensioner if the fault has been memorised (fault no longer declared).
Disconnect the computer connector and fit the 30 track adaptor.
The XRBAG tool MUST be used for checking resistance on the wire marked D on the adaptor.
If the value obtained is not correct , check the 30 track connector connection (tracks 3 and 4) 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 module of the passenger’s pretensioner .
The XRBAG tool MUST be used for checking resistance at point C1 (seat connector) of the passenger’s
pretensioner line.
If the value obtained is not correct , replace the wiring between points C1 and C3 (seat 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 pretensioner if it has been replaced (tool Elé. 1287).
AFTER REPAIR
88
88-15

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