Upper Vent Switch

WARNING: This page is about a different car, the 2008 Infiniti M45 and 2008 Infiniti M35. However, it is still accessible from the selected car via links, so may be relevant.

When UPPER VENT switch is ON, UPPER VENT switch indicator turn ON, and upper ventilator door is automatically controlled.
When DEFROSTER (DEF) switch is ON, upper ventilator door is shut.
When MODE position (driver side) is FOOT or D/F, upper ventilation door is shut.
When UPPER VENT switch is OFF, UPPER VENT switch indicator turn OFF, and upper ventilator door is shut.