Repair Procedures: Inspection

WARNING: This page is about a different car, the 2019 Kia Soul EV. However, it is still accessible from the selected car via links, so may be relevant.

Turn the ignition switch OFF.
Disconnect the negative (-) battery terminal.
Verify that the auto defogging actuator operates to the open position when 12V is connected to terminal 3 and ground to terminal 4.
Verify that the auto defogging actuator operates to the close position when connected in reverse.
Connect the auto defogging actuator connector.
Turn the ignition switch ON.

Check the voltage between terminals 5 and 6.

Courtesy of KIA MOTORS AMERICA, INC.

Specification

Door position	Voltage (V)	Error detecting
Defog OFF (CLOSE)	0.30±0.15	Low voltage: 0.1V or less High voltage: 4.9V or more
Defog ON (OPEN)	3.0±0.15	Low voltage: 0.1V or less High voltage: 4.9V or more

It will feedback the current position of the actuator to controls.

If the auto defogging actuator does not operate well, substitute with a known-good auto defogging actuator and check for proper operation. Use the replaced actuator if it performs well.