1.Connect the DLC cable of diagnostic tool to the data link connector (16 pins) in driver side crash pad lower panel, turn the power on diagnostic tool.

2.Select the 'S/W Management' and 'Car model'.
3.Select the 'Smart Key Unit' and 'Smart Key Code Saving'.

4.Follow the instructions on the screen.

Smart Key Diagnostic
Smart Key UnitHyundai Tucson (NX4) 2022-2025 Service Manual: High Mounted Stop Lamp
- Removal
1.Disconnect the negative (-) battery terminal.
2.Remove the rear spoiler.(Refer to Body - "Rear Spoiler")
3.Remove the high mounted stop lamp assembly (A) after loosening screws (4EA).
- Installation
1.Install the high mounted stop lamp.
2.Install the rear spoiler.
3.Conn ...
Hyundai Tucson (NX4) 2022-2025 Service Manual: Relay Box (Engine Compartment)
- Inspection
Power Relay (Type A)
1.There should be continuity between the No.30 and No.87 terminals
when power and ground are connected to the No.85 and No.86 terminals.
2.There should be no continuity between the No.30 and No.87 terminals when power is disconnected.[Engine room relay box]
...