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Home >> Geo >> 1993 >> Tracker Base, 4WD, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Engine Coolant Temperature (ECT) Sensor
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Engine Coolant Temperature (ECT) Sensor

Engine Coolant Temperature (ECT) sensor monitors coolant temperature. A reference voltage (supplied and monitored by ECM) is modified by sensor resistance, which changes according to temperature. High coolant temperature causes low resistance and low coolant temperature causes high resistance. The ECM uses this information to control fuel injectors and emission components.

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