Hyundai Santa Fe: Heater / Auto Defogging Actuator. Repair procedures

Hyundai Santa Fe (TM) 2019-2024 Service Manual / Heating,Ventilation And Air Conditioning / Heater / Auto Defogging Actuator. Repair procedures

Turn the ignition switch OFF.
Disconnect the auto defogging connector.
Verify that the auto defogging actuator operates to the open position when connecting 12V to terminal 3 and grounding terminal 6.
Verify that the auto defogging actuator operates to the close position when connected in reverse.

1. -
2. -
3. DEF (Close)
4. Sensoer ground
5. Feedback signal
6. Sensor (+ 5V)
7. DEF (Open)

Connect the auto defogging actuator connector.
Turn the ignition switch ON.
Check the voltage between terminals 5 and 4.
It will feedback the current position of the actuator to controls.
Door position
Voltage (V)
Error detecting
Defog ON (Open)
0.94 ± 0.15
Low voltage : 0.7V or less
Defog OFF (Close)
4.7 ± 0.15
High voltage : 4.9V or less

If the measured voltage is not within specification, check the operation by replacing the existing auto defogging actuator with a new genuine part. After that, determine whether replacement of the auto defogging actuator is required or not.
Disconnect the negative (-) battery terminal.
Remove the main crash pad assembly.
(Refer to Body - "Main Crash Pad Assembly")
Press the lock pin and separate the connector (A) and loosen the mounting screws and remove the auto defogging actuator (B).

Install in the reverse order of removal.

    Auto Defogging Actuator. Components and components location




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    Power adjustment

    The front seat can be adjusted by using the control switches located on the outside of the seat cushion. Before driving, adjust the seat to the proper position so that you can easily control the steering wheel, foot pedals and controls on the instrument panel.


    NEVER allow children in the vehicle unattended. The power seats are operable when the vehicle is turned off.

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