Reatta V6-231 3.8L VIN C SFI (1990)
Vehicle Speed Sensor: Description and Operation
Vehicle Speed Sensor
The Vehicle Speed Sensor (VSS) sends a pulsing voltage signal to the ECM/PCM, which the ECM/PCM converts to miles per hour. The BCM receives
an input signal from the VSS to control the operation of the Torque Converter Clutch (TCC) system. There are several different types of vehicle speed
sensors. The ECM/PCM parameter ED12 reading should closely match the speedometer reading with drive wheels turning.
