Fuel Gauge: Description and Operation
FUEL GAGEThe IPC displays the fuel level as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the fuel level percent. The fuel gage defaults to empty if:
^ The PCM detects a malfunction in the fuel level sensor circuit.
^ The IPC detects a loss of class 2 communications with the PCM.
When the fuel level is less than a pre-determined value, the low fuel indicator illuminates.
Reviewing the fuel system description and Operation will further explain how the system functions.