Discovery I (LJ) V8-3.9L (1994)
Wheel Speed Sensor: Service and Repair
Wheel Speed Sensor
Front
CAUTION: If a sensor is removed for any reason, a NEW sensor bush and seal must be fitted.
REMOVE
1. Disconnect the battery negative lead.
2. Disconnect required sensor electrical connection, located on inner wing [fender] panel.
3. Remove sensor lead from clips.
Front Wheel Sensor - ABS
4. Clean area surrounding sensor to prevent ingress of dirt. Using a suitable lever pry sensor from mounting bush.
5. Release harness cable ties, remove sensor lead from vehicle.
6. Remove top swivel retaining bolts complete with brake jump hose and sensor seal. Remove sensor bush.
REFIT
1. Insert new sensor bush and seal.
2. Refit brake jump hose bracket, coat bolts with Loctite(r) 270 or equivalent.
3. Lightly coat new sensor using EP 90 oil. Push sensor through bush until it contacts exciter ring. Sensor will be knocked back to correct position
when vehicle is driven.
4. Secure sensor lead in original position.
5. Reconnect sensor electrical connection.
6. Clear error code.
7. Drive vehicle to ensure ABS warning light is extinguished.
Rear
CAUTION: If a sensor is removed for any reason, a NEW sensor bush must be fitted.
REMOVE
1. Disconnect the battery negative lead.
2. Disconnect sensor electrical connections, located above rear axle.
3. Remove sensor from its locating clip.