23 · Diagnostics

Abs failure warning light on

Make: Alfa Romeo
Model: Brera and Spider Factory Service Manual
Year: 2005–2010
Section: Instrument panel › Abs failure warning light on

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Fault diagnosisAbs failure warning light on

ABS FAILURE WARNING LIGHT ON

N.B.: The brake node sends the ABS warning light on message via the C-CAN to the Body Computer which makes it available via the gateway to the Instrument Panel Node through the B-CAN.

If there are problems in the C-CAN, the control unit warning lights for this network will light up. The "CAN INFORMATION" check is designed for this eventuality

0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the EXAMINER diagnostic equipment and check the following at the CAN INFORMATION: No control units inactive No faulty control units no control units with faulty CAN	Move on to Step 1	1. Fault on CAN network	1. Continue following the instructions for the diagnostic equipment
		Move on to Step 1	2. Impossible to converse with the Body Computer	2. Move on to Step 7
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Keeping the diagnostic equipment connected, check the following at the BRAKE NODE: No system/component errors No CAN faults	Move on to Step 2	1. System/components faulty	1. Continue following the instructions for the diagnostic equipment
		Move on to Step 2	2. Fault on C-CAN	2. Move on to Step 7
2	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 3	Presence of errors	Continue following the diagnostic equipment information
3	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 4	Electric power supply positive and/or earth faulty	Replace defective component (in the case of a fuse, find out what caused it to blow).
4	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 5	Electrical connections not working.	Renew the damaged electrical connections.
5	ACTIVE DIAGNOSIS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	With the Examiner in the Instrument Panel Node ambient check that the ABS warning light is correctly activated in Active Diagnosis.	Move on to Step 6	The ABS warning light does not flash	Replace the Instrument Panel Op. 5560B10 CONTROL PANEL - R+R
6	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 warning light status varies.	Move on to Step 7	1. Impossible to connect to the Body Computer control unit.	1. Move on to Step 7
			2. Presence of errors.	2. Continue following the diagnostic equipment instructions.
			3. The parameter values do not change	3. Move on to Step 8
7	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 8	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 9	Impossible to connect to the Body Computer control unit.	Replace Body Computer Op. 5505A32 BODY COMPUTER - R.R

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Parts & tools for this job For 2005 Alfa Romeo Brera

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