The ECU uses this reading to calculate the coolant temperature, and from there adjusts the fuel injection, fuel mix, and ignition timing, and controls when the electric cooling fan is switched on and off. The resistance of the sensor varies with temperature, this is how the ECU can monitor temperature changes.
To get an accurate reading of the current engine temperature, the ECU sends a regulated voltage to the CTS. The sensor works with the vehicle’s ECU, continually monitoring the coolant temperature to make sure the engine is running at the optimum temperature. What is a Coolant Temperature Sensor and How Does It Work?Ī coolant temperature sensor (CTS) (also known as an ECT sensor or ECTS (engine coolant temperature sensor) is used to measure the temperature of the coolant/antifreeze mix in the cooling system, giving an indication of how much heat the engine is giving off.
#COOLANT TEMPERATURE SWITCH VS SENSOR HOW TO#
How to Replace a Coolant Temperature Sensor?.How to Spot a Faulty Coolant Temperature Sensor?.What is a Coolant Temperature Sensor and How Does It Work?.In this guide, we take a closer look at coolant temperature sensors, offering information on what they do and how they work, and step-by-step advice on diagnosing and replacing a faulty sensor yourself.
But how do cooling systems know when the engine is operating at the right temperature? Every driver knows that coolant/antifreeze is needed to keep an engine at optimum temperature.
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