22 · Diagnostics

Airbag failure warning light on

Make: Alfa Romeo
Model: 147 Factory Service Manual
Year: 2000–2004
Section: Air bags › Airbag failure warning light on

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Fault diagnosisAirbag failure warning light on

AIRBAG FAILURE WARNING LIGHT ON

During starting, the 'Air Bag failure' warning light comes on and remains on for more than 4 seconds (control unit initial test)

1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
		Results of the tests
	Connect an Examiner to the diagnostic socket Verify: that there are no faults in the Air Bag control unit	Continue to Step 2	Driver's Air Bag error	Continue to Step 2
			Passenger Air Bag error	Continue to Step 3
			Driver's Side Bag error	Continue to Step 4
			Passenger Side Bag error	Continue to Step 4
			Driver's Air Bag with curtain error	Continue to Step 5
			Passenger Air Bag with curtain error	Continue to Step 5
			Driver's pretensioner error	Continue to Step 6
			Passenger pretensioner error	Continue to Step 6
			Driver's satellite sensor error	Continue to Step 7
			Passenger satellite sensor error	Continue to Step 7
			Passenger Air Bag disabling switch error	Continue to Step 8
			Air Bag failure warning light error	Continue to Step 9
			Examiner does not converse	Verify: supply and earth for AIR BAG control unit. Connection between diagnostic socket and Air Bag control unit See E7030 AIRBAG
2	DRIVER'S AIR BAG CHECK	All OK	Problems met	Operation
	Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes See Test 5580CA Driver's Air Bag check	Continue to Step 3	Air Bag defective	Replace Air Bag Op. 5580C18
			Clock spring defective	Replace the clock spring Op. 5580C12
			Faulty wiring	Replace wiring
			Control unit defective	Replace air bag control unit Op. 5580C14
3	PASSENGER AIR BAG CHECK	All OK	Problems met	Operation
	Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes See Test 5580CB Passenger BAG, SIDE BAG and HEAD BAG check	Continue to Step 4	Air Bag defective	Replace Air Bag Op. 5580C22
			Faulty wiring	Replace wiring
			Control unit defective	Replace air bag control unit Op. 5580C14
4	SIDE BAG CHECK	All OK	Problems met	Operation
	Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes See Test 5580CB Passenger BAG, SIDE BAG and HEAD BAG check	Continue to Step 5	Air Bag defective	Replace Air Bag Op. 5580C44
			Faulty wiring	Replace wiring
			Control unit defective	Replace air bag control unit Op. 5580C14
5	AIR BAG WITH CURTAIN CHECK	All OK	Problems met	Operation
	Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes See Test 5580CB Passenger BAG, SIDE BAG and HEAD BAG check	Continue to Step 6	Air Bag defective	Replace Air Bag Op. 5580C50
			Faulty wiring	Replace wiring
			Control unit defective	Replace air bag control unit Op. 5580C14
6	PRETENSIONER CHECK	All OK	Problems met	Operation
	Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes See Test 5580CE Pretensioner check	Continue to Step 7	Pretensioner defective	Replace pretensioner Op. 7065A12
			Faulty wiring	Replace wiring
			Control unit defective	Replace air bag control unit Op. 5580C14
7	SATELLITE SENSOR CHECK	All OK	Problems met	Operation
	Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes See Test 5580CF Satellite sensor check	Continue to Step 8	Sensor defective	Replace satellite sensor Op. 5580C40
			Faulty wiring	Replace wiring
			Control unit defective	Replace air bag control unit Op. 5580C14
8	PASSENGER AIR BAG DISABLING SWITCH CHECK	All OK	Problems met	Operation
	Verify: operation of passenger Air Bag disabling switch connection between passenger Air Bag disabling switch and Air Bag control unit See E7030 AIRBAG	Continue to Step 9	Passenger Air Bag disabling switch faulty	Replace the device Op. 5580C26
		Continue to Step 9	Connections not correct	Replace wiring; See E7030 AIRBAG
9	CHECKING ELECTRICAL EQUIPMENT	All OK	Problems met	Operation
	Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes Check the connection between the Air Bag control unit and the Air Bag failure warning light at the instrument panel connector. To switch off the fault warning light, the AIR BAG control unit sends a posistive signal to the instrument panel.	Continue to Step 10	Faulty wiring	Replace wiring: See E7030 AIRBAG
10	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check it is working properly.		Fault persists	Replace air bag control unit Op. 5580C14 Search for the fault starting from another symptom'

‹ Prev Sun roof sticking Next › Airbag failure warning light off / (do not carry out initial test)

Parts & tools for this job For 2000 Alfa Romeo 147

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