12 · Diagnostics

S30 Brake noise - whistling, squeaking

DiagnosisS30 Brake noise - whistling, squeaking

Diagnosis table

When braking whistling or squeaking is noted leading from the wheel area. Vibrations are also noted in the passenger compartment

If noise changes when steering, it may be caused by parts other than the brakes, see table S45

Step	Validity	Operation to be performed	Test results
Step	Validity	Operation to be performed	OK	⚠	🔧
			All OK	Problems found	Intervention
1		CHECK PAD TYPE AND SURFACE Check: – intactness of front pad/rear shoe braking surfaces – type of front pads/rear shoes	Go to Step 2	Braking surfaces vitrified or with traces of grease, oil, water	Clean, check and eliminate the causes of the problem. if required, replace front pads PROCEDURE OP. 3310A60 or rear shoes PROCEDURE OP. 3320B12
1			Go to Step 2	Pads/shoes not of prescribed type	Replace front pads PROCEDURE OP. 3310A60 or rear shoes PROCEDURE OP. 3320B12
2		CHECK DISKS – Check intactness of front disks – Check intactness of rear drums	Go to Step 3	Disks/drums worn or damaged	Grind disks PROCEDURE OP. 3310A54 (front) or drums PROCEDURE OP. 3320B38 (rear) or, if required, replace them PROCEDURE OP. 3310A50 (front) or PROCEDURE OP. 3320B34 (rear)
			Go to Step 3	Disks/drums worn or damaged
	3		CHECK CORRECT OPERATION Check the fault is no longer present	All OK	End of test	Fault persists	Seek the fault starting from another symptom (the noise was not interpreted correctly: see Glossary)

Parts & tools for this job For 1998 Fiat Seicento

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