16 · Diagnostics

X50 Tyre wear

Make: Alfa Romeo
Model: 156 Factory Service Manual
Year: 1997–2002
Section: Consumption / leaks / wear › X50 Tyre wear

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Fault diagnosisX50 Tyre wear

X50 Tyre wear

There is irregular wear of the tyres.

Step	Test procedure	Result	Action
0	PRELIMINARY CHECKS Check that all four tyres are the same, homologated type	OK	Move onto step 1
0		Tyres different or not homologated	Replace the tyres involved End of diagnosis
1	SHOULDER WEAR CHECK Carefully examine the type of wear. The shoulders have worn quickly	OK	Move onto step 2
1		Inflation pressure too low	Restore the correct pressure; if necessary, replace the tyres involved End of diagnosis
2	CENTRE AREA WEAR CHECK Carefully examine the type of wear. The centre areas have worn quickly	OK	Move onto step 3
2		Inflation pressure too high	Restore the correct pressure; if necessary, replace the tyres involvedOp. 4450B10 End of diagnosis
3	CHECK FOR PRESENCE OF CRACKS Carefully examine the type of wear. There are cracks in the tread	OK	Move onto step 4
3		Inflation pressure too low or tyre is not the recommended type	Restore the correct pressure; if necessary, replace the tyres involvedOp. 4450B10 End of diagnosis
4	CHECK FOR WEAR ON ONE SIDE Carefully examine the type of wear. The tyre has worn quickly on one side only	OK	Move onto step 5
		Front wheel geometry not correct	Check the wheel geometry: Op. 4450A10 . If necessary, replace the tyres involved End of diagnosis
		Rear wheel geometry not correct	Check the wheel geometry: Op. 4450A40 . If necessary, replace the tyres involved End of diagnosis
5	CHECK FOR THE PRESENCE OF INDIVIDUAL AREAS OF WEAR Carefully examine the type of wear. There are individual areas of wear.	OK	Move onto step 6
		Balancing not correct or tyre defective	Balance the wheels correctly; if necessary, replace the tyres involved End of diagnosis
		Front shock absorbers not working properly	Replace the shock absorbers involved Op. 4410A10 End of diagnosis
		Rear shock absorbers not working properly	Replace the shock absorbers involved Op. 4420A10 End of diagnosis
6	CHECK FOR PRESENCE OF WEAR "IN STEPS" Carefully examine the type of wear. The wear is "in steps"	OK	Move onto step 7
		Front wheel geometry not correct	Check the wheel geometry: Op. 4450A10 . If necessary, replace the tyres involved End of diagnosis
		Rear wheel geometry not correct	Check the wheel geometry: Op. 4450A40 . If necessary, replace the tyres involved End of diagnosis
7	CHECK CORRECT OPERATION Check that the fault is no longer present	OK	End of diagnosis
7		Fault persists	Incorrect selection of diagnostic procedure

‹ Prev X30 Power steering system leaks Next › Z50 Mixture strength error (1.6 TS/1.8 TS/2.0 TS/2.5 V6 Euro3)

Parts & tools for this job For 1997 Alfa Romeo 156

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