Wheel Speed Sensor
WARNING: This page is about a different car, the 1994 Mitsubishi Pickup. However, it is still accessible from the selected car via links, so may be relevant.
The 2-wire rear wheel speed sensor is mounted in the rear differential carrier. Sensor transmits wheel speed information to the RWAL control unit. This low AC voltage signal is generated through magnetic induction when a toothed exciter ring inside the differential passes the stationary magnetic coil of the sensor. This voltage signal increases in both frequency and amplitude as rear wheel speed increases.