Engine Coolant Temperature Gauge

The IPC displays the engine coolant temperature as determined by the engine control module (ECM). The IPC receives a GMLAN message from the ECM indicating the engine coolant temperature. The IPC engine coolant temperature gauge only displays coolant temperatures greater than 60°C. The engine coolant temperature gauge defaults to 60°C or below if:

• The ECM detects a malfunction in the engine coolant temperature sensor circuit.
• The IPC detects a loss of GMLAN communications with the ECM.
• The body control module (BCM) detects a loss of GMLAN communications with the ECM.