Hyundai Genesis (DH): Air Conditioning System / Auto Defogging Sensor Description and Operation
The auto defogging sensor is installed on the front window
glass. The sensor judges and sends signal if moisture occurs to blow out
wind for defogging. The air conditioner control module receives signal
from the sensor and restrains moisture and eliminate defog by
controlling the intake actuator, A/C, auto defogging actuator, blower
motor rpm, and mode actuator.

Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the crash pad under cover [RH].
(Refer to Body - "Crash Pad Under Cover")
3.
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Disconnect the connector and then remove the auto defogging sensor (A).
3.
Install in the reverse order of removal.