Prizm L4-108 1.8L DOHC VIN 8 MFI (1998)
Vehicle Speed Sensor: Description and Operation
Vehicle Speed Sensor (VSS)
Vehicle Speed Sensor (VSS)
The VSS is an electronic relay that is mounted on the transaxle. As the transaxle turns the VSS, the VSS provides the speedometer with a vehicle speed
input (voltage pulses). This input is used to drive the speedometer. The speedometer then converts this vehicle speed input into a more precise waveform
and provides the PCM and the cruise control module (if equipped) with its own vehicle speed input. The PCM converts this input (ground pulses) into a
vehicle speed.
