Fuel Gauge: Description and Operation

Fuel level is read and displayed by the IPC. The IPC obtains fuel level data from the PCM on the serial data line. The IPC only displays the actual fuel level data sent by the PCM; so the PCM is responsible for sending the correct data to the IPC. The IPC will display a LOW FUEL message on the DIC when the IPC receives low fuel data from the PCM. If the IPC cannot receive proper fuel level data from the PCM (due to a communication or sensor malfunction), the IPC will command the fuel gauge to the lowest possible setting.