Vehicle Speed Sensor: Description and Operation

Mounting Of Vehicle Speed Sensor.:

Vehicle Speed Sensor Wiring.:

PURPOSE
The transaxle controller, located inside the powertrain control module (PCM) receives five signals from various switches and signals and two signals (vehicle speed and engine rpm), internally from the engine control module, also located within the PCM. The PCM uses this information during control of the transaxle shift points.

OPERATION
The vehicle speed sensor (VSS) is a variable reluctance pulse generator that senses the transaxle output. It operates between 0-161 kph (0-120 mph).

The VSS informs the PCM of vehicle speed.

LOCATION
The VSS is mounted on the transmission.