Engine Coolant Temperature Gage

The instrument panel cluster (IPC) displays the engine coolant temperature as determined by the engine control module (ECM). The IPC receives a serial data messages from the ECM indicating the engine coolant temperature. The engine coolant temperature gage defaults to the gage lowest position or below if:

• The ECM detects a malfunction in the engine coolant temperature sensor circuit.
• The IPC loses serial data communication from the ECM.