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Hyundai Equus: Auto Defogging Actuator Repair procedures - Heater - Heating, Ventilation and Air Conditioning - Hyundai Equus VI 2009-2022 Service ManualHyundai Equus: Auto Defogging Actuator Repair procedures

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the auto defogging connector.
3.
Verify that the auto defogging actuator operates to the open position when connecting 12V to terminal 3 and grounding terminal 4.
Verify that the auto defogging actuator operates to the close position when connected in reverse.

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

4.
Connect the auto defogging actuator connector.
5.
Turn the ignition switch ON.
6.
Check the voltage between terminals 6 and 5.
Specification
Door position
Voltage (V)
Error detecting
Defog OFF (Close)
4.7 ± 0.15
Low voltage : 0.1V or less
Defog ON (Open)
1.0 ± 0.15
High voltage : 4.9V or more

It will feedback the current position of the actuator to controls.
7.
If the measured voltage is not within specification, substitute with a known-good auto defogging actuator and check for proper operation.
8.
Replace the auto defogging actuator if it is proved that there is a problem with it.
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the cowl side trim.
(Refer to Body - "Cowl Side Trim")
3.
To remove the crash pad under cover [RH] (A), press both sides of the locking pin and then pull it down.

4.
Disconnect the under lamp connector (A).

5.
Remove the stopper (B) from the glove box (A).

6.
Disconnect the air damper (A) from the glove box (B).

7.
Remove the glove box housing (A) after loosening the mounting screws and nuts.

8.
Disconnect the glove box lamp connector (A).

9.
Remove the passenger's side shower duct.

10.
Disconnect the connector (A) and then remove the auto defogging actuator (B) after loosening the mounting screws.

11.
Install in the reverse order of removal.
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