Astro Van M V6-262 4.3L VIN Z (1994)
![background image](/chevrolet/astro_van_m/v6-262_4.3l_vin_z/Page-903001.png)
Vehicle Speed Sensor: Description and Operation
Component Description
Vehicle Speed Sensor (VSS)
PURPOSE:
The Vehicle Speed Sensor (VSS) provides information to the ECM for control of transmission Torque Converter Clutch (TCC), speedometer,
odometer and cruise control.
OPERATION:
The VSS is a Permanent Magnet (PM) generator that produces a pulsing A/C voltage whenever vehicle speed exceeds about 3 mph (5 Kph). The
A/C voltage level and the number of pulses increases with vehicle speed and is converted by the ECM to MPH (Kph). A VSS buffer is
incorporated into the ECM for operating the instrument panel speedometer and odometer.
LOCATION:
Transaxle