Vehicle Speed Sensor: Description and Operation

Vehicle Speed Sensor:

PURPOSE
The Vehicle Speed Sensor (VSS) provides an AC voltage signal for the speedometer.

LOCATION
Mounted to the transaxle, above the final drive gear.

OPERATION
The Vehicle Speed Sensor (VSS), as it is turned by the speedometer pinion, generates an AC voltage that is sent to the speedometer. This AC voltage signal is developed into a DC digital voltage (0-5 volts when the vehicle is moving) and sent to the PCM.