Instrument Cluster Description and Operation: Speedometer

The instrument panel cluster (IPC) displays the vehicle speed based on information from the vehicle speed signal circuit. The engine control module (ECM) converts the data from the vehicle speed sensor to a 4,000 pulses/mile signal. The vehicle speed signal circuit is pulled up to controlled battery voltage in the IPC. The IPC uses the vehicle speed signal circuit from the ECM in order to calculate the vehicle speed. The speedometer defaults to 0 km/h (0 mph) when a malfunction in the vehicle speed signal circuit exists. The speedometer displays either miles or kilometers as requested by the activation of the English/metric setting on the driver information center (DIC). The associated indicator, MPH or KM/H illuminates in the IPC. The speedometer range is 0 - 160 mph or 0 - 260 k/mh.