Cutlass V6-231 38L VIN A 2-bbl Coolant Temperature Sensor/Switch (For Computer) Specifications
Coolant Temperature Sensor/Switch (For Computer): Description and Operation
Sensor--mounted in the engine coolant stream--supplies a varying DC voltage to the ECM representing engine temperature.
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Sensor resistance is high when the engine is cold and low when the engine is warm.
The ECM controls temperature dependent systems accordingly.