18 · Diagnostics

R01 Airbag failure warning light on

Make: Alfa Romeo
Model: 147 Factory Service Manual
Year: 2000–2002
Section: Air bag › R01 Airbag failure warning light on

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Fault diagnosisR01 Airbag failure warning light on

R01 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)

Step	Test procedure	Result	Action
1	CHECK WITH DIAGNOSTIC EQUIPMENT Connect the Examiner to the diagnostic socket. Verify: that there are no faults in the Air Bag control unit	OK	Move onto step 2
		Driver's Air Bag error	Move onto step 2
		Passenger Air Bag error	Move onto step 3
		Driver's Side Bag error	Move onto step 4
		Passenger Side Bag error	Move onto step 4
		Driver's Air Bag with curtain error	Move onto step 5
		Passenger Air Bag with curtain error	Move onto step 5
		Driver's pretensioner error	Move onto step 6
		Passenger pretensioner error	Move onto step 6
		Driver's satellite sensor error	Move onto step 7
		Passenger satellite sensor error	Move onto step 7
		Passenger Air Bag disabling switch error	Move onto step 8
		Air Bag failure warning light error	Move onto step 9
		Examiner does not converse	Move onto step 10
2	DRIVER'S AIR BAG CHECK NOTE: Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes See Test 5580CA Driver's Air Bag check	OK	Move onto step 3
		Air Bag defective	Replace Air Bag Op. 5580C18 End of diagnosis
		Clock spring defective	Replace the clock spring Op. 5580C12 End of diagnosis
		Wiring defective	Replace wiring End of diagnosis
		Control unit defective	Replace Air Bag control unit Op. 5580C14 End of diagnosis
3	PASSENGER AIR BAG CHECK NOTE: 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	OK	Move onto step 4
		Air Bag defective	Replace Air Bag Op. 5580C22 End of diagnosis
		Wiring defective	Replace wiring End of diagnosis
		Control unit defective	Replace Air Bag control unit Op. 5580C14 End of diagnosis
4	SIDE BAG CHECK NOTE: 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	OK	Move onto step 5
		Air Bag defective	Replace Air Bag Op. 5580C44 End of diagnosis
		Wiring defective	Replace wiring End of diagnosis
		Control unit defective	Replace Air Bag control unit Op. 5580C14 End of diagnosis
5	AIR BAG WITH CURTAIN CHECK NOTE: 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	OK	Move onto step 6
		Air Bag defective	Replace Air Bag Op. 5580C50 End of diagnosis
		Wiring defective	Replace wiring End of diagnosis
		Control unit defective	Replace Air Bag control unit Op. 5580C14 End of diagnosis
6	PRETENSIONER CHECK NOTE: Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes See Test 5580CE Pretensioner check	OK	Move onto step 7
		Pretensioner defective	Replace pretensioner Op. 7065A12 End of diagnosis
		Wiring defective	Replace wiring End of diagnosis
		Control unit defective	Replace Air Bag control unit Op. 5580C14 End of diagnosis
7	SATELLITE SENSOR CHECK NOTE: Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes See Test 5580CF Satellite sensor check	OK	Move onto step 8
		Sensor defective	Replace satellite sensor Op. 5580C40 End of diagnosis
		Wiring defective	Replace wiring End of diagnosis
		Control unit defective	Replace Air Bag control unit Op. 5580C14 End of diagnosis
8	PASSENGER AIR BAG DISABLING DEVICE CHECK Check that the passenger Air Bag disabling switch is working properly: Wiring diagram E7030 AIRBAG	OK	Move onto step 9
8		Passenger Air Bag disabling switch faulty	Replace the device Op. 5580C26 End of diagnosis
9	AIR BAG CONTROL UNIT OPERATION CHECK Connect the Examiner to the diagnostic socket. In active diagnosis, check: the operation of the Air Bag failure warning light;	OK	Move onto step 10
9		Warning light bulb does not go out in any circumstances	Move onto step 4
10	ELECTRICAL EQUIPMENT CHECK NOTE: Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes Verify: connection between passenger Air Bag disabling switch and Air Bag control unit Check the connection between the Air Bag control unit and the Air Bag failure warning light at the instrument panel connector Air Bag control unit and instrument panel connector supplies correct Connection between diagnostic socket and Air Bag control unit : Wiring diagram E7030 AIRBAG	OK	Move onto step 11
		Connections not correct	Replace / renew wiring: Wiring diagram E7030 AIRBAG End of diagnosis
		Instrument panel connector not working	If necessary, replace the instrument panel connector Op. 5560B11 End of diagnosis
		AIR BAG control unit not working	Replace the Air Bag control unit Op. 5580C14 End of diagnosis
11	CORRECT OPERATION CHECK Check it is working properly	OK	Incorrect selection of diagnostic procedure
11	CORRECT OPERATION CHECK Check it is working properly	Fault persists	Incorrect selection of diagnostic procedure

‹ Prev Q05 Sunroof jamming Next › R02 Airbag failure warning light off (initial test not run)

Parts & tools for this job For 2000 Alfa Romeo 147

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