Kia Niro: Engine Control System / Engine Coolant Temperature Sensor (ECTS) Repair procedures

Inspection

1.	Switch "OFF" the ignition.

2.	Remove the ECTS (Refer to "Removal").

3.	After immersing the thermistor of the sensor into engine coolant, measure resistance between the ECTS terminals 1 and 2.

Check that the resistance is within the specification.

Removal

Engine Coolant Temperature Sensor (ECTS) [Water Temperature Control Assembly]

1.	Switch "OFF" the ignition and disconnect the negative (-) battery terminal.

2.	Remove the air cleaner assembly. (Refer to Engine Mechanical System - "Air Cleaner")

3.	Remove the purge control solenoid valve. (Refer to Engine Control / Fuel System - "Purge Control Solenoid Valve (PCSV)")

4.	Disconnect the engine coolant temperature sensor connector (A).

Remove the spring clip (B), and then pull the sensor from the water temperature control assembly.

Note that engine coolant may flow out from the water temperature control assembly when removing the sensor.

Engine Coolant Temperature Sensor (ECTS) [EGR Cooler Tube]

1.	Turn the ignition switch OFF and disconnect the battery (-) terminal.

2.	Remove the air cleaner assembly. (Refer to Engine Mechanical System - "Air Cleaner")

3.	Disconnect the engine coolant temperature sensor connector (A).

Remove the spring clip (B), and then pull the sensor from the water temperature control assembly.

Note that engine coolant may flow out from the water temperature control assembly when removing the sensor.

Installation

•	Install the component to the specified torque.

•	Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing.

•	Apply the engine coolant to the O-ring.

•	Insert the sensor in the installation hole and be careful not to damage it.

1.	Install in the reverse order of removal.

2.	Replenish the engine coolant. (Refer to Engine Mechanical System - “Coolant”)

Circuit Diagram ECTS [Water Temperature Control Assembly] Harness Connector ECTS [EGR Cooler Tube] Harness Connector ...

Specification Item Specification Coil Resistance (Ω) 774 - 946 [20°C (68°F)] ...

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