Air Conditioning Cut 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 the engine is running in excessively high load condition, ECM requests IPDM E/R to turn air conditioner relay OFF, and stops the compressor. Refer to "AIR CONDITIONING CUT CONTROL: SYSTEM DESCRIPTION " (VQ37VHR) or "AIR CONDITIONING CUT CONTROL: SYSTEM DESCRIPTION " (VK56VD) for details.