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Home >> Mercury >> 1999 >> Tracer Trio >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - Except Diesel >> Computerized Engine Controls >> Input Devices >> Intake Air Temperature (IAT) Sensor

Intake Air Temperature (IAT) Sensor

IAT sensor is a thermistor which changes resistance in proportion to temperature changes. IAT sensor inputs air temperature to the PCM. The IAT sensor provides a quicker temperature change response time than the ECT sensor.

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