Coolant temperature sensor how to#
Coolant temperature sensor driver#

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?

Coolant temperature sensor driver#

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.

Coolant temperature sensor how to#

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