Vehicle Speed Sensor (VSS)

VSS consists of a reed switch and magnet located in speedometer head on Sidekick and X-90. On Esteem and Swift, VSS is mounted on transmission. As magnet rotates within VSS, magnet causes reed switch to turn on and off. Switching action increases or decreases in proportion with vehicle speed. PCM supplies and monitors a voltage signal to VSS. PCM uses this signal to help determine control of idle speed control system and up-shift indicator light on Swift.