23 · Diagnostics

Pre-tensioner failure

Fault diagnosisPre-tensioner failure

PRE-TENSIONER FAILURE

When applying this procedure, always consider the following:

Measurements cannot be carried out on the airbag wiring.
Begin testing the system with the vehicle appliances still connected.
The fault must be "Present" or "Present Intermittently" and not "Intermittent". In the event of an Intermittent fault, the Procedure is not applicable. Check the line where the fault was reported carefully.
Not all the simulation sensors are available (e.g. side impact sensors).

The airbag fault warning light is controlled by a dedicated connection to the airbag control unit Instrument Panel Node.

The airbag wiring is a safety component. If faults occur in the wires or connectors, all the wiring must be replaced.

1	ELECTRICAL CONNECTION CHECK	All OK	Problems encountered	Operation
	Turn the key to OFF. Check the connector on the control unit is correctly connected Check that all the rear wiring connectors are correctly connected See E7030 AIRBAG	Move on to Step 2	One or more connectors are not correctly connected	Reconnect the connector/s correctly Clear the errors using the diagnostic tester and proceed to step 4
2	CHECK THE PRETENSIONER	All OK	Problems encountered	Operation
	Disconnect the fauly pretensioner from the wiring and connect a dummy resistance in its place. Turn the key ON and activate communication. Check whether the fault in that pretensioner has become intermittent	Move on to Step 3	The fault is still Present	Turn the key to OFF. Replace the rear wiring Clear the errors using the diagnostic tester and proceed to step 4
3	REPLACE FRONT SEAT BELT	All OK	Problems encountered	Operation
	Turn the key to OFF. Replace the front seat belt with the faulty pretensioner Op. 7065A12 FRONT SEAT BELT (ONE), LH OR RH, WITH PRETENSIONER ON WHEEL - R R Clear the errors using the diagnostic tester	Move on to Step 4
4	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Check that the tester does not indicate other faults	End of diagnosis	The diagnostic tester reports other faults	Proceed as instructed in the See table K80 AIRBAG FAILURE WARNING LIGHT ON

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