Automatic Air Flow Control

WARNING: This page is about a different car, the 2018 Infiniti Q60. However, it is still accessible from the selected car via links, so may be relevant.

A/C auto amp. decides target air flow depending on target air mix door opening angle.
A/C auto amp. changes duty ratio of blower motor control signal and controls air flow continuously so that air flow matches to target air flow.
When air outlet is VENT or B/L, the minimum air flow is changed depending on sunload.

Courtesy of NISSAN NORTH AMERICA, INC.