AUTOMATIC AIR CONDITIONING SYSTEM: Temperature Control

WARNING: This page is about a different car, the 2013 Infiniti M56 and 2013 Infiniti M37. However, it is still accessible from the selected car via links, so may be relevant.

When ignition switch is in the ON position, A/C auto amp. always automatically controls temperature regardless of air conditioning operational state.
A/C auto amp. calculates the target air mix door opening angle depending on set temperature, in-vehicle temperature, ambient temperature and sunload.
Air mix door is controlled depending on the comparison of current air mix door opening angle and target air mix door opening angle.
Regardless of in-vehicle temperature, ambient temperature and sunload, air mix door is fixed at the fully cold position when set temperature is 18.0°C (60°F), and at the fully hot position when set temperature is 32.0°C (90°F).

Fig 1: Temperature Control Function Graph
Courtesy of NISSAN NORTH AMERICA, INC.