Kia Cee'd: 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.

Intake Air Temperature Sensor (IATS) Repair procedures

Inspection 1. Turn the ignition switch OFF. 2. Disconnect the IATS connector. 3. Measure resistance betwe ...

Engine Coolant Temperature Sensor (ECTS) Specifications

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

Other information:

Kia Cee'd JD Service Manual: Components and components location
Component Location   1. Horn switch 2. Horn relay (Engine room compartment) 3. Clock spring 4. Horn (Low pitch) 5. Horn (High pitch) ...

Kia Cee'd JD Owners Manual: Engine coolant
The high-pressure cooling system has a reservoir filled with year-round antifreeze coolant. The reservoir is filled at the factory. Check the antifreeze protection and coolant concentration level at least once a year, at the beginning of the winter season, and before traveling to a colder ...