A4 Check Resistance at Sensor(s)

- Locate and disconnect the anti-lock sensor(s) in question.

Testing Sensor:

- Measure the resistance between the following sensor pins at the connector(s) leading to the anti-lock sensor(s) in question:

LH Front Anti-Lock Sensor "BK/W" and "O/W"

RH Front Anti-Lock Sensor "BK/R" and "O"

LH Rear Anti-Lock Sensor "BK/BL" and "R/BL"

RH Rear Anti-Lock Sensor "BK/O" and "W"

- Is the resistance reading 1600-2000 ohms?

YES -- Service wire(s) from sensor(s) to anti-lock brake control module.

NO -- Replace anti-lock sensor(s).