![]() A second coolant temperature sensor could be installed in the radiator or in another part of the engine. Sensor for electrocardiography (ECT) the engine computer, or PCM, is connected to the ECT sensor. The primary ECT sensor (ECT sensor 1) is usually located near the thermostat in the cylinder head or block, or on the thermostat housing. Many automobiles have multiple coolant temperature sensors. Ⅳ Application of Coolant Temperature Sensor in Vehicles 4.1 Location on Automobiles This vedio show that how coolant temperature sensor works The ECT sensor's tip protrudes into a cooling system passage and is submerged in coolant. A Negative Temperature Coefficient (NTC) thermistor is a type of engine cooling temperature sensor in which the electrical resistance decreases as the temperature rises. The temperature of the liquid coolant is measured by an engine coolant temperature sensor or ECT. ![]() The cooling system in a car with an internal combustion engine keeps the engine at the proper temperature and prevents it from overheating. When the temperature parameter is -40℃, the corresponding voltage is 4.98V,while the temperature parameter is 185℃, the corresponding voltage is 0.02V. If the parameter is higher than 185℃, it means that there was the same failure as-40℃. The voltage change range is 0 ~ 5V. The coolant temperature should be 85~105℃ when operating, if the parameter of CTS is -40℃, it indicates that there is a short-circuit in CTS. When the engine cools down from the start of the cold car to the hot car, the parameters of the fluid temperature sensor gradually increase, and the vehicle is idling when the engine is completely warmed up. ![]() The range of temperature changes: -40 to 195☌. Therefore, its temperature is inversely proportional to resistance, and its voltage is also inversely proportional to resistance. Generally, the structure of the coolant temperature sensor seems to be a negative thermistor. When the car is hot, the ECU will correct to inject the leaner mixture the same way, when the engine coolant temperature signal is detected, the ECU controls the cooling and the fan is turned on and off. When the cold car starts or the engine warms up, the ECU will correct the fuel injection. The temperature of the engine coolant transmit the signal to the ECU, and the ECU measured temperature and correct the fuel injection volume according to the signal indication. The signal of the coolant temperature sensor is a correction signal, and its function is to inspect the temperature of the engine coolant. The feature of a negative thermistor is that the higher the temperature, the smaller the resistance, the lower the temperature, the greater the resistance.įigure1: the circuit image of coolant temperature sensor The CTS is applied to detect the temperature of the engine coolant. The internal part is equipped with a negative thermistor with negative temperature characteristics. The coolant temperature sensor is installed on the water jacket of the engine block or cylinder head, contracting with the coolant directly. The sensor communicates with the vehicle's ECU and continuously monitors coolant temperature to ensure that the engine is operating at the proper temperature. We take a closer inspection at coolant temperature sensors in this guide, providing information on what they do and how they work, as well as step-by-step instructions for diagnosing and replacing a faulty sensor.Ī coolant temperature sensor (CTS) (also known as an ECT sensor or ECTS (engine coolant temperature sensor)) measures the temperature of the coolant/antifreeze mix in the cooling system, indicating how much heat the engine is producing. However, how do cooling systems recognize when the engine is at the proper operating temperature? Ⅵ Frequently Asked Questions about Coolant Temperature Sensor AnalysisĮvery driver is aware that coolant/antifreeze is applied to keep an engine operating at peak efficiency. Ⅴ How to Replace the Faulty Coolant Temperature Sensor Ⅳ Application of Coolant Temperature Sensor in VehiclesĤ.2 Ways of Testing Coolant Temperature Sensor Ⅲ The Working Principle of Coolant Temperature Sensor Ⅱ Function and Structure of Coolant Temperature Sensor
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