Circuit Description

A toothed wheel mounted on the output shaft of transmission generates an AC voltage pulse as it moves past the Vehicle Speed Sensor (VSS). The VSS contains a permanent magnet surrounded by a coil of wire, which produces the magnetic field. As the toothed ring interrupts the magnetic field, an AC pulse is generated. As vehicle speed increases, the AC voltage pulse also increases.

PCM supplies to signal to the cruise control module, instrument cluster and radio head control.