2751091 - K64 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.

		Results of the tests
1	PRELIMINARY CHECK	All OK	Problems met	Operation
	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
			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.