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Engine Coolant Temperature Sensor:

ECTS Reference Chart:

ECTS Reference Table:

PURPOSE
The engine coolant temperature sensor is used to detect the engine coolant temperature.

OPERATION
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.