Analog Instrument Panels: Operation: Gauges: Speedometer
Vehicle Speed Sensor (VSS) is as permanent magnet signal generator that produces analog output signal proportional to vehicle speed. This signal is processed by Vehicle Control Module/Powertrain Control Module (VCM/PCM) to produce a digital signal (4000 pulses per mile) that is sent to IPC on designated circuit.
NOTE:
Incorrect VSS calibration may adversely affect operation of ABS, engine control system and cruise control system.