Kia Sedona: Engine Coolant Temperature Sensor (ECTS) Description and Operation - Engine Control System - Engine Control / Fuel System - Kia Sedona YP Service ManualKia Sedona: Engine Coolant Temperature Sensor (ECTS) Description and Operation

Third generation YP (2014-2020) / Kia Sedona YP Service Manual / Engine Control / Fuel System / Engine Control System / Engine Coolant Temperature Sensor (ECTS) Description and Operation

Description
Located in the engine coolant passage of the cylinder, the Engine Coolant Temperature Sensor (ECTS) is used to detect the engine coolant temperature. The ECTS uses a thermistor whose resistance changes 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.

Engine Coolant Temperature Sensor (ECTS) Specifications
Specification TemperatureResistance (kΩ)°C°F-40-4048.14-20-414.13 ~ 16.830325.7920682.31 ~ 2.59401041.15601400.59801760.32 ...

Engine Coolant Temperature Sensor (ECTS) Schematic Diagrams
Circuit Diagram ...

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