939003657 - K072 HANDBRAKE APPLIED WARNING LIGHT

The warning light is on constantly even with the handbrake released.

N.B.: The command to switch on the handbrake warning light is sent by the switch on the lever to the Body Computer Node which makes it available on the B-CAN to the Instrument Panel Node.

0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the ABS warning light comes on and goes out during the initial test	Move on to Step 1	The ABS warning light also remains on	Continue as instructed in the    See table K062 ABS AND HANDBRAKE WARNING LIGHTS BOTH ON
1	ELECTRICAL SYSTEM CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the insulation to earth of the wiring between the Handbrake lever switch and the Body Computer	Move on to Step 2	Wiring not insulated	Restore wiring    See E4010 INSTRUMENT PANEL
2	SWITCH CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the condition of the switch on the handbrake lever	Move on to Step 3	Switch defective	Replace the switch    Op. 5550D18 HANDBRAKE ON WARNING LIGHT SWITCH - R+R
3	ACTIVE DIAGNOSIS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	With the Examiner in the Instrument Panel Node ambient check that the handbrake warning light is correctly activated in Active Diagnosis.	Move on to Step 6	1. The handbrake warning light does not flash	1.Replace the Instrument Panel    Op. 5560B10 CONTROL PANEL - R+R
			2. Impossible to connect with the Instrument Panel Node	2.Move on to Step 4
4	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Using the Examiner check, in the Instrument Panel Node ambient, that there are no errors and that the parameters are present	Move on to Step 5	Presence of errors	Continue following the diagnostic equipment information
5	ELECTRICAL POWER SUPPLY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the electrical power supply for the Instrument Panel Node is correct	Move on to Step 6	Electric power supply positive and/or earth faulty	Replace defective component (in the case of a fuse, find out what caused it to blow).
6	ELECTRICAL CONNECTIONS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the electrical connections betwen the Body Computer and the Instrument Panel, in particular that each individual pin is correctly connected	Move on to Step 7	Electrical connections not working	Renew the damaged electrical connections
7	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Using the Examiner check, in the Body Computer ambient, that there are no errors and that the parameter specified varies	Move on to Step 10	1. Impossible to connect to the Body Computer control unit	1. Move on to Step 8
			2. Presence of errors	2. Continue following the diagnostic equipment instructions
			3. The parameter values do not change	3. Move on to Step 9
8	ELECTRICAL POWER SUPPLY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the electrical power supply for the Body Computer Node is correct	Move on to Step 9	Electric power supply positive and/or earth faulty	Replace defective component (in the case of a fuse, find out what caused it to blow).
9	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Using the Examiner, check whether it is possible to connect to the Body Computer Node	Move on to Step 10	Impossible to connect to the Body Computer control unit	Replace Body Computer    Op. 5505A32 BODY COMPUTER - R.R
10	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present	End of diagnosis