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Home >> Mercury >> 1992 >> Capri L4-1597cc 1.6L DOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Coolant Temperature Sensor/Switch (For Computer) >> Description and Operation
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Coolant Temperature Sensor/Switch (For Computer): Description and Operation

Engine Coolant Temperature (ECT) Sensor:






PURPOSE
The Engine Coolant Temperature (ECT) sensor constantly supplies the ECA with a signal reflecting engine coolant temperature. The ECA reads varying sensor resistance and determines engine operating temperature. This information is used in calculations for air/fuel mixture, idle speed, fuel pressure, and purge flow.

OPERATION
The ECT is a negative temperature coefficient sensor. As coolant temperature increases, sensor resistance decreases, and vice versa.
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