The Engine Coolant Temperature sensor does this by getting a 5-volt reference from the car’s Electronic Control Unit (ECU). The Engine Coolant Temperature Sensor is similar to the IAT sensor in working, which is used to get an accurate measurement of the temperature of the engine. How Does A Coolant Temperature Sensor Work How Does A Coolant Temperature Sensor Work Related Post: How to Replace a Coolant Temperature The tip of the Engine Coolant Temperature Sensor is plugged into the path of the engine coolant in such a way that it is completely immersed in the engine coolant. In fact, the ECU sends more fuel to the engine, when it is cold, the fuel must be richer to prevent stalling and less fuel when warmed up. The ECT sensor sends the signals to the ECU the ECU continuously monitors engine temperature to make sure the engine is running under the right air-fuel mixture. If this signal, which is sent back by the ECT sensor, is out of range or is unexpected, due to the abnormal temperature of the engine, the ECU turns on the check engine light on your dashboard, so you know that your car’s engine is overheating. When a signal is sent by the Electronic Control Unit (ECU) of the car to the ECT sensor, the ECT sensor processes the received signal on its current resistance which is in fact a product of the temperature of the engine and sends it back to the ECU of the car. In the positive temperature coefficient (PTC) thermistors, the resistance increases with the increase in the temperature, whereas for a thermistor with a negative temperature coefficient, the resistance of the thermistor decreases with the increase in temperature. Negative Temperature Coefficients (NTC) Thermistor.Positive Temperature Coefficients (PTC) Thermistor. The thermistor has two types of coefficients that determine its working mechanism. The ECT sensor of the car is a thermistor mostly with a negative temperature coefficient and changes its temperature according to the temperature in its surroundings. The coolant temperature sensor is a resistor-based (thermistor) sensor, which changes its value according to the change in temperature of the engine’s coolant. Related Post: How To Test Coolant Temp Sensor Wiring With Multimeter Engine Temperature WarningĪccording to the research, the ECT sensor has effects on the following elements. The voltage reading sent back by the ECT sensor is then used to observe the amount of heat that the engine coolant has absorbed from the engine and determines the engine’s temperature using this recorded reading of the temperature of the engine’s coolant. This reading of the temperature of the engine coolant determines the resistance of the ECT sensor the voltage sent by the car ECU is then processed under this resistance and sent back. The ECT sensor of the car does not measure the temperature of the car’s engine directly instead, it measures the temperature of the engine’s coolant and converts those measurements into electrical signals, which are then used to have the correct air-fuel ratio for combustion. This rise in temperature is sent to the ECU, which determines the temperature of the engine, and adjusts the amount of injection of fuel into the combustion chamber. As the car’s engine heats up, the heat is absorbed by the engine coolant, and its temperature rises. The Coolant Temperature Sensor (CTS) also known as the Engine Coolant Temperature (ECT) Sensor (ECTS) is a thermal resistor or thermistor used to measure the temperature of the engine’s coolant (antifreeze) and sends this information to the ECU.Īntifreeze (coolant) is a liquid that is mixed with water to keep the radiator from freezing or overheating in extreme weather conditions. What Is ECT Sensor What Is An Engine Coolant Temperature (ECT) Sensor How Does A Coolant Temperature Sensor Work.
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