23 · Diagnostics

Airbag failure warning light on

Make: Fiat
Model: Panda Factory Service Manual
Year: 2003–2012
Section: Instrument panel › Airbag failure warning light on

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Fault diagnosisAirbag failure warning light on

AIRBAG FAILURE WARNING LIGHT ON

The brake fluid warning light remains on with the handbrake not applied.

The brake fluid level signal is sent by the special sensor (N.C. with maximum brake fluid level) to the Body Computer Node which makes it available via the B-CAN to the Instrument Panel Node which lights up the dedicated warning light and displays the insufficient brake fluid level message; if the warning light is faulty the relevant message is displayed.

1	PRELIMINARY CHECK	All OK	Problems met	Operation
		Results of the tests
	Check that the brake fluid/VDC level warning light failure message is not present. Check that the insufficient brake fluid level message is not present	Continue to Step 6	Warning light failure message present	Continue to Step 7
		Continue to Step 6	Insufficient brake fluid message present	Continue to Step 2
2	TOP UP BRAKE FLUID LEVEL	All OK	Problems met	Operation
	Top up the brake fluid level and check that the warning light and the message are not longer present	Continue to Step 9	The warning light does not go off	Continue to Step 3
3	CHECKING ELECTRICAL EQUIPMENT	All OK	Problems met	Operation
	Disconnect the connector from the fluid level sensor and, using a multimeter, check the efficiency of the connection to earth See E4010 INSTRUMENT PANEL	Continue to Step 4	Faulty earth	Restore earth connection efficiency See E4010 INSTRUMENT PANEL Continue to Step 3
4	CHECKING ELECTRICAL EQUIPMENT	All OK	Problems met	Operation
	Bridge the cables at the connector and check that the warning light in the instrument panel is not on and the message is no longer present See E4010 INSTRUMENT PANEL	Continue to Step 9	Warning light on and message present	Continue to Step 5
5	CHECKING ELECTRICAL EQUIPMENT	All OK	Problems met	Operation
	Check the continuity of the cable from the connector to the Body computer See E4010 INSTRUMENT PANEL	Continue to Step 7	Cable broken	Restore connection See E4010 INSTRUMENT PANEL
6	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the Examiner and check the plausibility, at the Body Computer Node, of the handbrake applied parameter	Continue to Step 7	The parameter is not plausible	Continue according to the instructions See table K69
7	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the Examiner or keep it connected and check the operation of the brake fluid level warning light at the Instrument Panel Node through active diagnosis	Continue to Step 8	The warning light is damaged / not flashing	Replace instrument panel Op. 5560B11
8	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Keeping the Examiner connected, check the plausibility of the brake fluid level parameter at the Body Computer Node	Continue to Step 9	The parameter is not plausible	Replace the Body Computer Op. 5505A32
9	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	The fault persists	Replace the brake fluid reservoir and sensor.

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

Measurements cannot be taken on the Air Bag wiring.
The system fault diagnosis is started leaving the vehicle charges connected.
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.
Not all the simulation sensors are available (e.g. side impact sensors).

The Air Bag failure warning light is controlled directly through a dedicatec connection to the "Instrument Panel Node" from the Air Bag Control Unit.

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 one piece.

1	ELECTRICAL CONNECTION CHECK	All OK	Problems encountered	Operation
	Check that the Air Bag wiring connected is connected to the control unit	Move on to Step 2	The wiring connector is not connected to the control unit	With the ignition OFF, connect the connector to the control unit then turn the ignition key ON and check that the fault has disappeared
2	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic equipment and activate the dialogue	Move on to Step 3	The diagnostic dialogue is not activated	Proceed as instructed in the See table Z095 DIAGNOSIS CANNOT BE STARTED ON THE AIRBAG CONTROL UNIT
3	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Carry out the fault diagnosis of the Air Bag system until one or more errors of the Present type are notified by the control unit	Move on to Step 5	The diagnostic equipment signals one or more Intermittent type errors	Check that the contact for the wiring connector pins is not loose (pins unstable in their housing, oxidized or distorted) See E7030 AIRBAG Stress the Air Bag wiring (including any intermediate wiring and connectors between the control unit and the component) and move on to Step 4
4	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Check whether the Intermittent type errors have become Present type errors	Move on to Step 5	The Intermittent type errors have remained the Intermittent type	Delete the errors and move on to Step 6
5	ERRORS IN CONTROL UNIT CHECK	All OK	Problems encountered	Operation
	Check which Present type error is communicated		One or more of the following errors is present "D602 - Bus off" and/or "9001 - Control unit broken" Error "90F2 - Air Bag and pretensioner impact data" present Error "90F21- Pretensioner impact data" present One or more of the following errors present "90F3 - Driver's Air Bag impact data" and/or "90F4 - Passenger Air Bag impact data". One or more of the following errors present "9008 - Driver's Air Bag resistance 1st level" and/or "901B - Driver's Air Bag resistance 2nd level" One or more of the following errors present "9009 - Passenger Air Bag resistance 1st level" and/or "900A - Passenger Air Bag resistance 2nd level" One or more of the following errors present "900B - Driver's pretensioner resistance" and/or "900C - Passenger pretensioner resistance". Error "9002 - Battery voltage" present Error "9014 - Passenger Air Bag disabling switch" present One or more of the following errors present "900E - Driver's Air Bag resistance" and/or "900F - Passenger Air Bag resistance". One or more of the following errors present "9015 - Driver's front side impact 1st sensor" and/or "9017 - Passenger front side impact 1st sensor" Error "9004 - Connection to ECU container earth" present	Turn the ignition key OFF. Replace the Air Bag control unit Op. 5580C14 AIR BAG ECU - R+R Turn the ignition key OFF. Replace the Air Bag control unit Op. 5580C14 AIR BAG ECU - R+R Proceed as instructed in the See table Z096 PRESENCE OF COLLISION DATA (CRASH) WITH INVOLVEMENT OF PRE-TENSIONERS ONLY Proceed as instructed in the See table Z097 PRESENCE OF COLLISION DATA (CRASH) WITH INVOLVEMENT OF SIDE AIRBAGS Proceed as instructed in the See table Z098 DRIVER'S SIDE FRONT AIRBAG FAILURE Proceed as instructed in the See table Z099 PASSENGER'S SIDE FRONT AIRBAG FAILURE Proceed as instructed in the See table Z100 PRE-TENSIONER FAILURE Proceed as instructed in the See table B015 BATTERY CHARGE STATUS CHECK Proceed as instructed in the See table Z101 PASSENGER'S SIDE CHARGE CUT-OUT SWITCH FAILURE Proceed as instructed in the See table Z102 SIDE AIRBAG FAILURE Proceed as instructed in the See table Z103 SIDE CRASH SENSOR FAILURE Proceed as instructed in the See table Z104 CONTROL UNIT CASE EARTH CONNECTION FAILURE
6	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Replace the Air Bag control unit Op. 5580C14 AIR BAG ECU - R+R

‹ Prev Abs warning light off / (do not carry out initial test)Next › Warning light signalling handbrake applied does not come on

Parts & tools for this job For 2003 Fiat Panda

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