Wheel Speed Sensor on Front Axle

ABS Wheel Speed Sensor For Front Axle, Removing And Installing
Removing
- Raise vehicle.





- Disconnect connector for wheel speed sensor and speed sensor wiring -1-.
- Remove bolt -2- from wheel bearing housing.
- Remove ABS wheel speed sensor from wheel bearing housing.

Installing
- Before inserting wheel speed sensor, clean hole and coat speed sensor with grease, Part No. G 000 650.
- Insert wheel speed sensor into hole in wheel bearing housing and tighten bolt to 8 Nm (71 inch lbs.).
- Connect wheel speed sensor to speed sensor wiring.
- Turn wheels fully to left and right lock and check clearance of speed sensor wiring.

ABS Wheel Speed Sensor Rotor For Front Axle, Checking
- Raise vehicle.
- Remove wheel.
- Rotate brake disc and check whether wheel speed sensor rotor is damaged or dirty.
- If rotor is damaged, remove wheel hub with rotor and replace, Refer to Transmission and Drivetrain.

Rotor Runout, Checking
- Raise vehicle.
- Remove wheel.





- Turn wheel hub and measure distance between rotor and speed sensor, dimension -a-, all around.
^ dimension -a- = 0.3 mm (0.0118 inch)

- If rotor is not true, remove wheel hub with rotor and replace. Refer to Transmission and Drivetrain.

Front Wheel Speed Sensor Wiring, Removing And Installing
Required Special Tools





^ VAS 1978 wiring repair kit





Removing:
- Obtain radio code on vehicles with coded radio.
- Disconnect battery.
- Pull off intake hose -1- and connector -2- from Mass Air Flow (MAF sensor.
- Remove bolts -4- and -5-.
- Remove air cleaner unit. Refer to Powertrain Management.





- Remove connector from ABS Control Module (arrow -1-) and pull off (arrow -2-).





- Using a screwdriver, lift cover of multi-pin connector and remove.





- Using a small screwdriver, push purple latch indirection of arrow.








Pin assignment of harness connector T25 and ABS Control Module w/EDL) -J104-





- Using extractor tool from harness repair kit VAS 1978, push out applicable terminals.





- [Disconnect wheel speed sensor and speed sensor wiring connector.
- Replace faulty wheel speed sensor wiring.
- Connect speed sensor to speed sensor wiring.





- Secure wheel speed sensor wiring (arrows).

Note:
^ Make sure the wiring is not twisted in the wheel well.

- Install pin connectors in connector housing,





- Using installation tool from VAS 1978, push individual wire seals to stop.
- Secure terminals by engaging purple latch and install connector cover of multi-pin connector.