Durango 4WD V8-5.9L VIN Z (1998)
Wheel Speed Sensor: Description and Operation
Four Wheel Antilock Brakes
The ABS brake system uses 3 wheel speed sensors. A sensor is mounted to each front steering knuckles. The third sensor is mounted on top of the rear
axle differential housing. The sensor is a magnet coil that is mounted over a tone wheel front/exciter ring rear with an air gap between them.
The sensors measure the wheel speed by monitoring the rotation of the tone wheels front/exciter ring rear. As the teeth of the tone wheels front/exciter
ring rear move through the magnetic field of the sensor an AC voltage is generated. This signal frequency increases or decreases proportionally to the
speed of the wheel. The Controller Antilock Brake (CAB) monitors these signals for changes in wheel deceleration. If the CAB detects a sudden wheel
or wheels deceleration within a predetermined amount the CAB will activate the ABS system.
