Operation CHARM: Car repair manuals for everyone.

General Information

A resistive type fuel sender is located in the fuel tank. The fuel sender is connected to the PCM via discrete inputs. The filtered fuel data is sent from the PCM to the IPC, via the class 2 serial data message.

The IPC uses the fuel data received from the PCM and a software program to determine the proper fuel level to display. The IPC updates the display within 300 milliseconds of receiving the data from the PCM, if the IPC can not communicate with the PCM, the fuel display indicates empty.