Engine Coolant Temperature Gauge

The instrument panel cluster (IPC) displays the engine coolant temperature as determined by the engine control module (ECM) or the powertrain control module (PCM). The IPC receives a serial data message from the ECM/PCM indicating the engine coolant temperature. The engine coolant temperature gauge defaults to "°C" or below if:

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