Fuel Gauge

The engine control module (ECM) sends fuel level information to the instrument panel module (IPM) via the serial data circuit. The instrument panel cluster (IPC) displays the fuel level as determined by the IPM. The IPC receives a serial data message from the IPM indicating the fuel level percent. The fuel gauge defaults to empty if:

• The ECM detects a malfunction in the fuel level sensor circuit.
• The IPC detects a loss of serial data communications with the IPM.
• The IPM detects a loss of serial data communications with the ECM.

When the fuel level is less than a predetermined value, the low fuel message displays in the driver information center (DIC). For more information, refer to Evaporative Emission Control System Description .