Some items need to be reset after the battery has been discharged or the battery has been disconnected. See chapter 3 for:
Hyundai Tucson (LM) 2010-2015 Service Manual: Repair procedures
Inspection
1.
After disconnecting the vapor hose from the PCV valve, remove the PCV valve.
2.
Reconnect the PCV valve to the vapor hose.
3.
Run the engine at idle, then put a finger over the open end
of the PCV valve and make sure that intake manifold vacuum can be felt.
...
Hyundai Tucson (LM) 2010-2015 Service Manual: Smart Key Repair procedures
Smart Key
Smart Key Code Saving
1.
Connect the DLC cable of GDS to the data link connector (16 pins) in driver side crash pad lower panel, turn the power on GDS.
2.
Select the vehicle model and then do "Smart key code saving".
3.
After selecting "Smart key teaching" menu, push "Enter" k ...