Kia Sportage: 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.

Specification
Temperature
Resistance (kΩ)
°C
°F
-40
-40
48.14
-20 ...
Circuit Diagram
Harness Connector
...
Other information:
Special Service Tools
Tool Name / Number
Illustration
Description
Lower arm ball joint remover
0K545-A9100
Used for removing the ball joint
Ball joint puller
09568-34000
...
Component Location
1. Hood switch
2. Burglar horn
3. BCM
4. Door lock / unlock buzzer
5. Front door actuator & switch
6. Rear door actuator & switch
7. Tailgate actuator & switch
...