Operation CHARM: Car repair manuals for everyone.

Speedometer

The vehicle speed is displayed in the IPC, based on the information from the PCM. The PCM monitors the vehicle speed sensor signal circuit in order to convert the data received from the vehicle speed sensor into a 4000 pulses/mile signal. The PCM uses the vehicle speed signal circuit in order to display the vehicle speed in the IPC. If the PCM detects a malfunction in the vehicle speed signal circuit, the speedometer will default to 0 km/h (0 mph). The speedometer displays km/h and mph.