SENSOR-REAR WHEEL SPEED
DESCRIPTION
A wheel speed sensor is used at each wheel. The front sensors are mounted to the steering knuckles. The rear sensors are mounted at the outboard end of the axle. Tone wheels are mounted to the outboard ends of the front and rear axle shafts. The gear type tone wheel serves as the trigger mechanism for each sensor.
OPERATION
The sensors convert wheel speed into a small digital signal. The ABM sends 12 volts to the sensors. The sensor has an internal magneto resistance bridge that alters the voltage and amperage of the signal circuit. This voltage and amperage is changed by magnetic induction when the toothed tone wheel passes the wheel speed sensor. This digital signal is sent to the ABM. The ABM measures the voltage and amperage of the digital signal for each wheel.
REMOVAL
1. Raise and support the vehicle.
2. Remove the wheel speed sensor mounting bolt (2) from the rear support plate (1).
3. Remove the wheel speed sensor (3) the support plate.
4. Disconnect the wheel speed sensor electrical connector (3).
INSTALLATION
1. Insert the wheel speed sensor (2) through the support plate (1).
2. Tighten the wheel speed sensor bolt (2) to 12-14 N·m (106-124 in. lbs.).
3. Secure the wheel speed sensor wire (3) to the routing clips. Verify that the sensor wire is secure and clear of the rotating components.
4. Reconnect the wheel speed sensor electrical connector (3).
5. Lower the vehicle.