Anti-Lock Brake Sensor: Notes
WARNING: This page is about a different car, the 2003 Mercury Marauder, 2003 Mercury Grand Marquis, and 2003 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
The anti-lock brake system uses four variable-reluctance sensors to determine vehicle speed. The anti-lock brake sensors operate on magnetic induction principles. As the teeth on the anti-lock brake sensor indicator rotate past the stationary anti-lock brake sensor, a signal frequency that is proportional to vehicle speed is generated and sent to the anti-lock brake control module.