Incorrect wheel speed on one wheel: Diagnosis/troubleshooting

NOTE: If other faults are displayed in the ABS, remedy them first!

DIAGNOSIS TROUBLESHOOTING - FAULT CODE 4225, AS OF MY 2002

Work instruction			Display OK	If not OK
1	Check wheels and tyres	Check wheels and tyres for correct size Check tyre pressure	Step 2	Correct fault -> End
2	Check mechanical functionality	Check wheel-bearing play on all four wheels Check speed sensors and toothed discs on all four wheels for soiling and damage	Step 3	Clean and repair wheel bearings, speed sensors or toothed discs -> End
3	Check speed sensors	Check all four speed sensors for correct function	Step 5	Step 4
4	Replace affected speed sensors		-> End
5	Replace ABS control unit		-> End