Express 1/2 Ton Van V8-5.7L VIN R (1999)
Vehicle Speed Sensor: Description and Operation
Component Location
The Vehicle Speed Sensor (VSS) is a pulse counter type input that informs the VCM how fast the vehicle is being driven. The VSS system uses an
inductive sensor mounted in the tail housing of the transmission and a toothed reluctor wheel on the tail shaft. As the reluctor rotates, the teeth alternately
interfere with the magnetic field of the sensor creating an induced voltage pulse.
The VSS produces an AC voltage signal that increases with the vehicle speed. The VCM processes this signal and sends it to the following components:
^
The Instrument Panel.
^
The Cruise Control Module.
