Wheel Speed Sensor

All wheel speeds are detected by the Magnetic

Resistive Effect element type wheel speed sensor (1) and encoder (2). The wheel speed sensors are fixed to the steering knuckle and suspension knuckle.

The encoder consists of a permanent magnet which has south poles and north poles. As it is located on the wheel hub it turns along with the wheel.

The wheel speed sensor feeds pulse signals in proportion to the wheel speed to the ABS control module, which then calculates wheel speed based on such signal information.

Fig 1: Identifying Wheel Speed Sensor Integrated Circuit

Courtesy of SUZUKI OF AMERICA CORP.