Vehicle Speed Sensor: Description and Operation

DESCRIPTION





The vehicle speed sensor is located on the drivers side of the transmission case.

OPERATION
The vehicle speed sensor is a hall-effect type sensor used to detect the vehicle speed. The PCM calculates the vehicle speed based on the VSS signal. The PCM supplies 5 volts to power up the sensor and also supplies the sensor ground. The PCM also supplies a 5-volt pull-up voltage to the sensor. The VSS signal is created when the sensor alternates the 5-volt pull-up from high to low.