Coolant Temperature Sensor/Switch (For Computer): Description and Operation

COMPONENT PARTS

Engine Coolant Temperature Sensor






The engine coolant temperature sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the
ECM. The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.