16 · Diagnostics

S30 Brake noise

Fault diagnosisS30 Brake noise

During braking, a whistle or screech may be heard from the area of the wheels. Vibration may also be detected in the interior compartment.

Step	Test procedure	Result	Action
0	PRELIMINARY CHECKS Steer to the right or the left and check whether the noise increases.	OK	Noise does not change:Move onto step 1
0		The noise varies during steering	Move onto step (see S45)
1	CHECK PAD TYPE AND SURFACE Check: condition of pad friction surfaces pad type	OK	Move onto step 2
		Front friction surfaces vitrified or with traces of grease, oil or water Brake pads wrong type	Clean, check and eliminate the causes of the fault. Replace the pads if necessary Op. 3310A60 End of diagnosis
		Rear friction surfaces vitrified or with traces of grease, oil or water Brake pads wrong type	Clean, check and eliminate the causes of the fault. Replace the pads if necessary. Op. 3310B60 End of diagnosis
2	CHECK DISCS Check condition of brake discs	OK	Move onto step 3
		Front discs worn or damaged	Skim or if necessary replace the discs Op. 3310A50 End of diagnosis
		Rear discs worn or damaged	Skim or if necessary replace the discs Op. 3310B50 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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