E 450 V8-6.0L DSL Turbo VIN P (2004)
Coolant Temperature Sensor/Switch (For Computer): Description and Operation
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
Engine Coolent Temperature (ECT) Sensor
The engine coolant temperature (ECT) sensor is a thermistor device in which resistance changes with temperature. The electrical resistance of a
thermistor decreases as the temperature increases. and resistance increases as the temperature decreases. The varying resistance affects the voltage drop
across the sensor terminals and provides electrical signals to the PCM corresponding to temperature.
If the PCM receives a high engine temperature signal from the ECT, it will adjust fueling rates to protect the engine from damage due to overheating.
