Speedometer

The IPC displays the vehicle speed based on the information from the vehicle speed sensor buffer. The vehicle speed sensor buffer converts the analog signal from the VSS to a 4000 pulses/mile signal. The IPC uses the vehicle speed signal circuit (4000 pulses/mile) from the vehicle speed sensor buffer in order to calculate the vehicle speed. If the IPC detects a malfunction in the vehicle speed signal circuit, the speedometer will default to 0 km/h (0 mph).