Circuit Description
WARNING: This page is about a different car, the 2004 Suzuki Verona. However, it is still accessible from the selected car via links, so may be relevant.
As the wheel is rotated, the speed sensor produces an AC voltage that increases with wheel speed. The EBCM uses the frequency of the AC signal to calculate wheel speed. The speed sensor is connected to the EBCM by a "twisted pair" of wires. Twisting reduces noise susceptibility that may cause a DTC to set.