Precautions For Intelligent Key System
WARNING: This page is about a different car, the 2019 Infiniti Q60. However, it is still accessible from the selected car via links, so may be relevant.
The transponder (the chip for NATS ID verification) is integrated into the Intelligent Key. (For the conventional models, it is integrated into the mechanical key.) Therefore, ID verification cannot be performed by mechanical key only.
In that case, NATS ID verification can be performed when Intelligent Key backside is contacted to push-button ignition switch while brake pedal is depressed. If verification result is OK, engine can be started.