16 · Diagnostics

F02 Rear wheels lock when braking

Fault diagnosisF02 Rear wheels lock when braking

When the brakes are operated, the distribution between front and rear wheels is not correct: at worst, the rear wheels may lock and the car may skid

Step	Test procedure	Result	Action
0	PRELIMINARY CHECKS Carry out a preliminary check to see whether the ABS and handbrake warning lights come on simultaneously during starting and then go out.	OK	Move onto step 1
0		After starting, the two warning lights remain on	Move onto step (see K62)
1	CHECK BRAKE CALIPERS Check the condition of the rear brake caliper pistons	OK	Move onto step 2
1		Pistons worn or seized	Replace rear brake calipers Op. 3310B34 End of diagnosis
2	CHECKING FRONT BRAKE CONDITION Visually inspect: for absence of grease, oil or dirt on front pad braking surfaces	OK	Move onto step 3
2		for dirty braking surfaces	Clean, check and eliminate the causes of the fault. Replace the front pads if necessary Op. 3310A60 End of diagnosis
3	CHECK CORRECT OPERATION Check that the fault is no longer present	OK	End of diagnosis
3		Fault persists	Incorrect selection of diagnostic procedure

Parts & tools for this job For 1997 Alfa Romeo 156

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