Contents

To apply this procedure, the following must be borne in mind:

1 - Measurements cannot be taken on the Air Bag wiring

2 - System fault diagnosis should be started leaving the vehicle loads connected

3 - The fault should be 'Present' or 'Present Intermittently' and not 'Intermittent'. If the fault is Intermittent then the procedure is not applicable; proceed with an accurate check on the line where the fault was signalled

4 - 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 Air Bag wiring is a safety component. If there are problems with the cables or the connectors then the wiring should be replaced in its entirety.

		Test results
1	WIRING CHECK	All OK	Problems encountered	Operation
	Check wiring	Go to Step 2	Fault detected in wiring	Restore correct operation
2	CONTROL UNIT CONNECTIONS CHECK	All OK	Problems encountered	Operation
	Check for loose or damaged connections at the air bag control unit	Go to Step 3	Loose or damaged connections detected.	Restore correct operation
3	ELECTRICAL CONNECTION CHECK	All OK	Problems encountered	Operation
	Check the electrical circuit for short circuits to Vbatt. and earth.	Go to Step 4	1. Short circuit to Vbatt. 2. Short circuit to earth	1. Restore insulation to + battery. 2. Restore the earth insulation.
4	SIDE BAG CHECK	All OK	Problems encountered	Operation
	Turn the ignition key to the STOP position. As it is not possible to simulate the operation of the side impact sensor, the sensor must be disconnected Op. 5580C40 SIDE BAG SENSOR (ONE), LH OR RH - R.R.	End of diagnosis	The fault is still present	Turn the ignition key to the STOP position. Restore the original sensor and replace the rear wiring Op. 5505C40 INTEGRATED PASSENGER COMPARTMENT WIRING - R.R. WITH INTERFERING COMPONENTS REMOVED