22 · Diagnostics

Airbag failure warning light on

Make: Lancia
Model: Ypsilon Factory Service Manual
Year: 2003–2011
Section: Air bags › Airbag failure warning light on

‹ Prev Doors / boot open buzzer not present with car in motion Next › Airbag failure warning light off / (do not carry out initial test)

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 (after the control unit initial test, the warning light should go out)

In the case of a reasonably serious impact which has caused the activation of the complete system (Air Bag and Side Bag), the warning light stays on. The control unit memory cannot be cleared, so the control unit must always be replaced. If, on the other hand, only the Side Bags have been activated, the memory can be cancelled using the diagnostic equipment (Examiner or other instruments) twice. In this case the 'Air Bag Failure' warning light goes out. The control unit only has to be replaced if it is activated a third time.

1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
		Results of the tests
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Check that there are no faults in the control unit.	Continue to Step 8	Driver Bag Error detected	Continue to Step 2
		Continue to Step 8	Passenger Bag Error detected	Continue to Step 3
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Check that there are no faults in the control unit.	Continue to Step 8	Driver Bag Error detected	Continue to Step 2
			Passenger Bag Error detected	Continue to Step 3
			Driver Side Bag Error detected	Continue to Step 4
			Passenger Side Bag Error detected	Continue to Step 5
			Driver's Side Sensor Error detected	Continue to Step 6
			Passenger Side Sensor Error detected	Continue to Step 7
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 Carry out See Test 5580CA Driver's bag check, checking under what circumstances the error disappears	Continue to Step 8	The line closing resistance eliminates the error: bag faulty	Replace the bag Op. 5580C18
			The line closing resistance eliminates the error: clock spring faulty	Replace the clock spring ( Op. 5580C12)
			Connections not correct	Restore the connections ( See E7030 AIRBAG)
			Control unit fault	Replace control unit ( Op. 5580C14
3	PASSENGER BAG CHECK	All OK	Problems met	Operation
	Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes Carry out See Test 5580CB Passenger bag and side bag check, checking under what circumstances the error disappears	Continue to Step 8	The line closing resistance eliminates the error: bag faulty	Replace the bag Op. 5580C22
			Connections not correct	Restore the connections ( See E7030 AIRBAG)
			Control unit fault	Replace control unit ( Op. 5580C14
4	DRIVER'S SIDE BAG CHECK	All OK	Problems met	Operation
	Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes Carry out See Test 5580CB Passenger bag and side bag check, checking under what circumstances the error disappears	Continue to Step 8	The line closing resistance eliminates the error: bag faulty	Replace the side bag
			Connections not correct	Restore the connections ( See E7030 AIRBAG)
			Control unit fault	Replace control unit ( Op. 5580C14)
5	DRIVER'S SIDE BAG CHECK	All OK	Problems met	Operation
	Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes Carry out See Test 5580CB Passenger bag and side bag check, checking under what circumstances the error disappears	Continue to Step 8	The line closing resistance eliminates the error: side bag faulty	Replace the side bag
			Connections not correct	Restore the connections ( See E7030 AIRBAG)
			Control unit fault	Replace control unit ( Op. 5580C14)
6	DRIVER'S SIDE SENSOR CHECK	All OK	Problems met	Operation
	Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes Carry out See Test 5580CC Side bag sensor check, referring to the driver's Side Bag line	Continue to Step 8	Connections not correct	Restore the connections ( See E7030 AIRBAG)
			Sensor faulty	Replace the sensor
			Control unit fault	Replace control unit ( Op. 5580C14)
7	PASSENGER SIDE SENSOR CHECK	All OK	Problems met	Operation
	Before any R/R operation involving the explosive charges, disconnect the battery leads for 10 minutes Carry out See Test 5580CC Side bag sensor check, referring to the passenger Side Bag line	Continue to Step 8	Connections not correct	Restore the connections ( See E7030 AIRBAG)
			Sensor faulty	Replace the sensor
			Control unit fault	Replace control unit ( Op. 5580C14)
8	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'

‹ Prev Doors / boot open buzzer not present with car in motion Next › Airbag failure warning light off / (do not carry out initial test)

Parts & tools for this job Staging For 2003 Lancia Ypsilon

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