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 ...

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Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Electric Parking Brake (EPB) Description and Operation


Description Description of EPB The EPB is an electronic parking brake. The EPB is different from existing parking systems which operated with the brake pedal or the lever type. The EPB system sends the signal to the ECU when a driver operates the EPB switch. The ECU operates the EPB actuator composed ...

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Hands Free Switch Repair procedures


Inspection 1. Check the hands free remote control switch for resistance between terminals in each switch position. [Audio/ Bluetooth] [Voice recognition] [Bluetooth] SwitchConnectorterminalResistance(±5%)Send2-718.91k?End of call2-740.91k? [Voice recognition] SwitchConnector terminalResistance(±5%)VoiceAudio/ ...

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