Envoy 2WD V6-4.3L VIN W (1998)
Vehicle Speed Sensor: Description and Operation
Vehicle Speed Sensor (2WD)
DESCRIPTION
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.
OPERATION
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 vehicle speed. The VCM processes this signal and sends it to the following
components:
^
Instrument Panel.
^
Cruise Control Module.
