DTC 33

DESCRIPTION








- At each wheel hub there is a tone wheel and an inductive sensor which supplies the wheel speed information to the ABS Control Module (ABSCM)The sensor comprises a magnet and a pole piece surrounded by a coil. When the tone wheel rotates adjacent to the sensor pole piece an alternating current signal is generated in the coil with a frequency proportioned to wheel speed.

- A special integrated circuit in the ABSCM translates the generated AC signal to a square wave.

- This square wave is used by the microprocessor to operate the ABS.

WIRING DIAGRAM




- Refer to image for circuit diagram.

INSPECTION PROCEDURE





1. Check Wheel Speed Sensor





2. Check wheel speed sensor with HI-SCAN





3. Check the harness and the connector between the ABS Control Module (ABSCM) and each wheel speed sensor