		Test results
0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	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 indicated See table K062 ABS AND HANDBRAKE WARNING LIGHTS BOTH ON
1	ELECTRICAL SYSTEM CHECK	All OK	Problems encountered	Operation
	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 the correct wiring See E4010 INSTRUMENT PANEL
2	SWITCH CHECK	All OK	Problems encountered	Operation
	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	Operation
	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 5	1. The handbrake warning light does not flash 2. Impossible to connect with the Instrument Panel Node 3. Errors present	1. Replace the Instrument Panel 2. Move on to Step 4 3. Continue following the instructions on the diagnostic instrument
4	ELECTRICAL POWER SUPPLY CHECK	All OK	Problems encountered	Operation
	Check the electricity supply to the Instrument Panel Node is correct	Move on to Step 5	Fault in positive electrical power supply and/or earth	Replace the defective component (in the case of a fuse, find out what caused it to blow)
5	ELECTRICAL CONNECTIONS CHECK	All OK	Problems encountered	Operation
	Check the electrical connections between the Body Computer and Instrument Panel, in particular, check that each individual pin is properly connected.	Move on to Step 6	Electrical connections not working	Restore the damaged electrical connections
6	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Using the Examiner check, in the Body Computer ambient, that there are no errors and that the parameter specified varies	End of diagnosis	1. Impossible to connect to the Body Computer control unit 2. Errors present 3. The parameters do not change	1. Move on to Step 7 2. Continue following the instructions on the diagnostic instrument 3. Move on to Step 8
7	ELECTRICAL POWER SUPPLY CHECK	All OK	Problems encountered	Operation
	Check the Body Computer power supply is correct	Move on to Step 8	Fault in positive electrical power supply and/or earth	Replace the defective component (in the case of a fuse, find out what caused it to blow)
8	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Use an Examiner to check the possibility of connection to the Body Computer Node	End of diagnosis	Impossible to connect to the Body Computer control unit	Replace the Body Computer Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R.

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

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.