Wheel Speed Sensor: Description and Operation

The anti-lock brake system uses four variable-reluctance anti-lock brake sensors to determine the rotational speed of each wheel. The front and rear brake anti-lock sensors operate on magnetic induction principle. As the teeth on the brake anti-lock sensor indicators rotate past the stationary brake anti-lock sensors, a signal proportional to the speed of the rotation is generated and sent to the anti-lock brake control module through a twisted pair harness.