Speedometer

The IPC displays the vehicle speed as determined by the PCM. The PCM converts the data from the vehicle speed sensor to a 4000 pulses/mile signal. The IPC uses the vehicle speed signal circuit (4000 pulses/mile) from the PCM in order to calculate the vehicle speed. If the IPC detects a malfunction in the vehicle speed signal circuit from the PCM, the IPC uses the class 2 message from the EBCM (indicating the vehicle speed) as a backup. The speedometer displays either miles or kilometers as requested by the activation of the english/metric button on the Driver Information Center (DIC). The associated indicator km/h or mph) illuminates.