DTC 65

DESCRIPTION








- At each wheel hub there is a tone wheel and an inductive sensor which supplies 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 schematic.

INSPECTION PROCEDURE





1. Check Wheel Speed Sensor





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