DTC 64

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 is comprised of 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 proportional 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 connector between the ABS Control Module (ABSCM) and each wheel speed sensor