Temperature Gauge: Description and Operation

CIRCUIT OPERATION
The temperature gauge is connected to the engine coolant temperature sensor on the G20 circuit. The engine coolant temperature sensor for the gauge is a combination unit. One side of the unit is used for the Powertrain Control Module (PCM) and the other side for the cluster. The sending unit is case grounded to the engine.

The logic driven gauge moves in response to the measured resistance of the engine coolant temperature sending unit.