Normal Operation
WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
The wheel speed sensor and sensor ring generate a square wave signal to the anti-lock brake system (ABS) module that is proportional to the wheel speed. The ABS module compares the wheel speed inputs from all of the wheel speed sensors to determine an impending wheel lockup.
Possible Causes
- Wheel speed sensor
- Wheel speed sensor ring
- Wheel bearing
- ABS module