22 · Diagnostics

Abs and handbrake warning lights both on

Make: Alfa Romeo
Model: GT Factory Service Manual
Year: 2003–2010
Section: Instrument panel › Abs and handbrake warning lights both on

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

Fault diagnosisAbs and handbrake warning lights both on

ABS AND HANDBRAKE WARNING LIGHTS BOTH ON

2.0 JTS, 3.2 V6, 1.9 JTD 16V

The handbrake lever is released

The handbrake warning light also indicates that the brake fluid level is low and, if it is on at the same time as the ABS warning light, the malfunction of the EBD system. A parking brake warning light activation command is sent by the switch on the lever to the Body Computer Node, which makes it available to the Instrument Panel Node via the B-CAN

1	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Connect the EXAMINER diagnostic equipment and check the CAN NETWORK INFORMATION: For inactive control units For control units with errors For control units with CAN errors	Continue to Step 2	Presence of faults in the CAN	Continue as instructed by the tester
		Continue to Step 2	Impossible to converse with the Body Computer	Continue to Step 8
2	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Keeping the diagnostic equipment connected, check that there are no CAN errors at the BRAKE NODE	Continue to Step 2	Presence of C-CAN faults	Continue to Step 10
3	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Using the Examiner check, in the Instrument Panel Node ambient, that there are no errors and the following parameters are present.	Continue to Step 4	There are errors	Continue in accordance with the instructions for the diagnostic equipment
4	ELECTRIC POWER SUPPLY CHECK	All OK	Problems met	Operation
	Check that the Instrument Panel Node electrical power supply is correct.	Continue to Step 5	Positive and/or earth electrical power supply fault.	Replace the defective component (if a fuse is involved, search for the cause of the problem)
5	CHECK ELECTRICAL CONNECTIONS	All OK	Problems met	Operation
	Check the electrical connections between the Body Computer and the Instrument Panel, in particular that each individual pin is correctly connected.	Continue to Step 6	Electrical connections not working.	Restore damaged electrical connections.
6	CHECK WITH ACTIVE DIAGNOSIS	All OK	Problems met	Operation
	With the Examiner in the Instrument Panel Node ambient, check, in active diagnosis, that the failure warning lights are correctly activated	Continue to Step 7	The warning lights do not flash	Replace the instrument panel Op. Op. 5560B11 ANALOGUE CONTROL PANEL - R+R OR REPLACE
7	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Using the Examiner check, in the Body Computer Node ambient, that there are no errors	Continue to Step 10	Impossible to connect with the Body Computer control unit.	Continue to Step 8
		Continue to Step 10	There are errors	Continue in accordance with the instructions for the diagnostic equipment
8	ELECTRIC POWER SUPPLY CHECK	All OK	Problems met	Operation
	Check that the Body Computer Node electrical power supply is correct	Continue to Step 9	Positive and/or earth electrical power supply fault.	Replace the defective component (if a fuse is involved, search for the cause of the problem)
9	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Using the Examiner, check the possibility of connecting with the Body Computer Node	Continue to Step 7	Impossible to connect with the Body Computer control unit.	Replace the Body Computer Op. Op. 5505A32 BODY COMPUTER - R R
10	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 Body Computer Op. Op. 5505A32 BODY COMPUTER - 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 Alfa Romeo GT

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