Ambient Temperature Input Process
WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
The front air control includes a processing circuit for ambient sensor 1 input. However, when the temperature detected by ambient sensor 1 increases quickly, the processing circuit retards the front air control function. It only allows the front air control to recognize an ambient temperature increase of 0.33°C (0.6°F) per 100 seconds.
This prevents constant adjustments due to momentary conditions, such as stopping after high speed driving. Although the actual ambient temperature has not changed, the temperature detected by ambient sensor 1 will increase. This is because the heat from the engine compartment can radiate to the front grille area, location of ambient sensor 1.