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Home >> Mercury >> 1999 >> Mystique LS, 2.5 L, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - Except Diesel >> Computerized Engine Controls >> Input Devices >> Engine Coolant Temperature (ECT) Sensor

Engine Coolant Temperature (ECT) Sensor

ECT sensor is a thermistor which changes resistance proportionate to temperature changes. ECT sensor inputs coolant temperature to the PCM. ECT sensor is threaded into heater outlet fitting or coolant passage.

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