12 · Diagnostics

X50 Tyre wear

DiagnosisX50 Tyre wear · page 1 of 2

Diagnosis table

Abnormal tyre wear is noted.

Preliminarily check the following:
– all four tyres of the same type
– all four tyres of homologated type.

Step	Validity	Operation to be performed	Test results
Step	Validity	Operation to be performed	OK	⚠	🔧
1	CHECK SHOULDER WEAR		All OK	Problems found	Intervention
1	Carefully check type of wear. Rapid shoulder wear is noted		Go to Step 2	Insufficient inflation pressure	Restore correct pressure. If required, replace the tyres
2	CHECK CENTRE AREA WEAR		All OK	Problems found	Intervention
2	Carefully check type of wear. Rapid centre area wear is noted		Go to Step 3	Excessive inflation pressure	Restore correct pressure. If required, replace the tyres
3	CHECK FOR CREASES		All OK	Problems found	Intervention
3	Carefully check type of wear. Cracked thread is noted		Go to Step 4	Insufficient inflation pressure or incorrect tyre type	Restore correct pressure. If required, replace the tyres
4	CHECK WEAR ON ONE SIDE		All OK	Problems found	Intervention
4	Carefully check type of wear. Rapid wear on one side is noted		Go to Step 5	Incorrect vehicle geometry	Check vehicle geometry: PROCEDURE OP. 4450A10 (front) 4450A40 (rear). If required, replace the tyres

(Cont..)

Parts & tools for this job For 1998 Fiat Seicento

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