Kia Optima Hybrid: Engine Control System / Engine Coolant Temperature Sensor (ECTS) Description and Operation

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual / Engine Control/Fuel System / Engine Control System / Engine Coolant Temperature Sensor (ECTS) Description and Operation

Description

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 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.

Intake Air Temperature Sensor (IATS) Repair procedures

Inspection 1. Turn the ignition switch OFF. 2. Disconnect the IATS connector. 3. Measure resistance between the IATS terminals 3 and 4. 4. Check that the resistance is within the specification. Temperature ...

Engine Coolant Temperature Sensor (ECTS) Specifications

Specification TemperatureResistance (k?)°C°F-40-4048.14-20-414.13 ~ 16.830325.7920682.31 ~ 2.59401041.15601400.59801760.32 ...

Other information:

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Specifications

Specification EngineT/MJoint typeMax. permissible angleOuterInnerOuterInnerGasoline 2.4M/TBJ#95TJ#9545°21°A/TBJ#95TJ#9545°21° Tightening torque ItemN.mkgf.mIb.ftFrontWheel nut88.2 ~ 107.89.0 ~ 11.065.0 ~ 79.5Driveshaft castle nut215.7 ~ 254.922.0 ~ 26.0159.1 ~ 188.0Strut assembly lower mounting bolt156.9 ...

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Seat Track Position Sensor (STPS) Repair procedures

Removal 1. Disconnect the battery negative cable, and wait for at least three minutes before beginning work. 2. Remove the front seat assembly. (Refer to BD group) 3. Loosen the two STPS screws, then remove the STPS after disconnecting the STPS connector. Installation Be sure to install ...