Engine Coolant Temperature Gauge

The powertrain control module (PCM) receives the engine coolant temperature status through hardwired circuitry to the engine coolant temperature (ECT) sensor (4.0L engine), or from the cylinder head temperature (CHT) sensor (4.6L engine). The instrument cluster receives the engine coolant temperature data from the PCM over the HS-CAN. The instrument cluster monitors the engine coolant temperature data received from the PCM and commands the engine coolant temperature gauge pointer.