Circuit Description

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

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