Circuit Description
WARNING: This page is about a different car, the 1997 GMC Pickup and 1997 Chevrolet Pickup. However, it is still accessible from the selected car via links, so may be relevant.
Vehicle Speed Sensor (VSS) circuit is a magnetic induction type sensor. Gear teeth pressed on outside diameter of output shaft assembly induce an alternating current in sensor as shaft rotates. Signal goes directly to VCM. Pulsing action takes place about 40 times per revolution of output shaft of transmission and VCM will calculate vehicle speed based on time between pulses.