Hyundai Kona: Engine Control System / Engine Coolant Temperature Sensor (ECTS) Description and operation

Engine Coolant Temperature Sensor (ECTS) is located in the engine coolant passage of the cylinder head for detecting the engine coolant temperature. The ECTS uses a thermistor that changes resistance with the temperature.

The electrical resistance of the ECTS decreases as the temperature increases, and increases as the temperature decreases. The reference +5V is supplied to the ECTS via a resistor in the ECM. That is, the resistor in the ECM and the thermistor in the ECTS are connected in series. When the resistance value of the thermistor in the ECTS changes according to the engine coolant temperature, the output voltage also changes.

During cold engine operation, the ECM increases the fuel injection duration and controls the ignition timing using the information of engine coolant temperature to avoid engine stalling and improve drivability.

Boost Pressure Sensor (BPS) Repair procedures

Inspection 1. Connect a GDS on the Data Link Connector (DLC). 2. Measure the output voltage of the BPS at idle and IG ON. ...

Engine Coolant Temperature Sensor (ECTS) Specifications

Specification Temperature Resistance (kΩ) °C °F -40 -40 48.14 -20 ...

Other information:

Hyundai Kona (OS) 2018-2025 Owners Manual: Fuel economy
Average Fuel Economy (1) The average fuel economy is calculated by the total driving distance and fuel consumption since the last average fuel economy reset. The average fuel economy can be reset both manually and automatically. Manual reset To clear the average fuel economy manually, press t ...

Hyundai Kona (OS) 2018-2025 Service Manual: Cylinder Head Cover Repair procedures
Removal 1. Remove the engine cover. (Refer to Engine and Transmission Assembly - "Engine Cover") 2. Disconnect the battery negative terminal. 3. Remove the air clean hose. (Refer to In ...