WARNING: This page is about a different car, the 2023 Hyundai Palisade. However, it is still accessible from the selected car via links, so may be relevant.
Connect the cable of Diagnostic tool to the data link connector in driver side crash pad lower panel.
Select the 'S/W Management' and 'Car model'.
Courtesy of HYUNDAI MOTOR AMERICA
Select the 'Smart Key Unit' and 'Neutralization Mode'.