22 · Diagnostics

Seat belt unfastened warning light on

Fault diagnosisSeat belt unfastened warning light on

SEAT BELT UNFASTENED WARNING LIGHT ON

With seat belts fastened, the seat belt unfastened warning light stays on.

The seat belt unfastened warning light is turned on by a direct earth control between the AIR BAG control unit and the Instrument Panel Node.

1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
		Results of the tests
	Connect an EXAMINER and check the AIR BAG CONTROL UNIT to ensure: there are no faults	Continue to Step 2	Presence of fault in warning light/belt switch	Continue following the instructions given by the diagnostic equipment
		Continue to Step 2	There are errors in the control unit	Continue according to the instructions for the diagnostic equipment
2	CHECKING WARNING LIGHT OPERATION	All OK	Problems met	Operation
	With the ignition key turned off, disconnect the airbag control unit, turn the key to ON and check the warning light is off	Continue to Step 4	warning light on	Continue to Step 3
3	CHECKING ELECTRICAL EQUIPMENT	All OK	Problems met	Operation
	Check the insulation of the warning light control lead from air bag control unit to the instrument panel. See E7030 AIRBAG	Continue to Step 5	cable short circuited to earth;	Change wiring See E7030 AIRBAG
4	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Replace air bag control unit Op. 5580C14
5	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present		Fault persists	Replace instrument panel Op. 5560B11 Search for the fault starting from another symptom'

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