ABS - Revised Diagnosis Procedure

9219audi01

Group: 45

Number: 90-01

Date: July 31, 1990


Subject:
Revised diagnosis procedure for vehicles with ABS


Model(s):
All








Program switch position # 6 on the ABS 2-LED tester is used to check the operation of each wheel speed sensor.

Each wheel on the vehicle is rotated individually during the wheel speed sensor test. The LED monitors wheel rotation speed and the tester measures the signal from the wheel speed sensor.

Note

The signal generated by each wheel speed sensor must be approximately equal to each of the other three wheel speed sensors.


Note

Refer to the Repair Manual microfiche Group 45 or Service Training booklet, Part No. WSP 521 139 00 for complete ABS diagnosis and wheel speed sensor adjusting procedures.