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Chart 1NO DIALOGUE WITH THE AIR BAG COMPUTER
NoneNOTES
Ensure that the fault finding tool is not the cause of the fault by trying to communicate with a computer
on another vehicle . If the tool is not at fault and dialogue can be established with another computer on
the same vehicle, it may be that a faulty computer has disrupted the fault finding linesK and L.
Proceed using successive disconnections in order to locate this computer.
Check the battery voltage and carry out the necessary operations to obtain the correct voltage (10.5 volts
< U battery > 16 volts).
When communication is established, deal with any faults which may be declared.
Check the presence and condition of the air bag computer supply fuse
Check the computer connector connection and the condition of the connector.
Check the computer is correctly supplied :
- Disconnect the air bag computer and fit the
XRBAG 50 track B50 adaptor .
- Check and ensure the presence of the +After Ignition Feed between the terminals marked earth and
+ After Ignition Feed
Check that the diagnostic socket is supplied correctly :
-+ Before Ignition Feed on track 16.
-Earth on track 5.
Check the continuity and resistance of the diagnostic socket / air bag computer connection lines :
- Between the terminal markedL 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 carrying out these different checks, replace the air bag computer
(refer to "Aid" section for this operation).
AFTER REPAIR
FAULT FINDING- FAULT CHARTS
WIRING
Air bags and seat belt pretensionersSIDE
88
88-88
