Fleetwood FWD V8-252 4.1L (1986)
Coolant Temperature Sensor/Switch (For Computer): Description and Operation
The coolant sensor is a thermistor mounted in the engine coolant flow. The ECM supplies a 5 volt signal to the coolant sensor through a resistor in the
ECM and measures voltage. Voltage will be high when engine is cold and low when engine is hot. The sensor provides coolant temperature information
to the ECM for ignition timing, fuel enrichment, canister purge control, EGR operation, EFE operation, air management, closed loop fuel control and
idle speed control.
