Circuit Description

Toothed wheel generates a voltage pulse as it moves past wheel speed sensor. The EBCM uses these pulses to determine wheel speed. Amount of voltage generated in each pulse depends on air gap between wheel speed sensor and toothed wheel and wheel speed.

Code 25 will be set if continuity is lost in circuits No. 830 or 873 with ignition on, or if no signal is produced by wheel speed sensor at vehicle speed of approximately 19 MPH or greater.