You can start the engine without inserting the key.
CAUTION
To prevent damaging the smart key:
Hyundai Tucson (LM) 2010-2015 Service Manual: Purge Control Solenoid Valve (PCSV) Description and Operation
Description
Purge Control Solenoid Valve (PCSV) is installed on the surge
tank and controls the passage between the canister and the intake
manifold. It is a solenoid valve and is open when the ECM grounds the
valve control line. When the passage is open (PCSV ON), fuel vapor
stored in th ...
Hyundai Tucson (LM) 2010-2015 Owners Manual: Battery
Jump starting can be dangerous if done incorrectly. Follow the jump starting
procedure in this section to avoid serious injury or damage to your vehicle. If
in doubt about how to properly jump start your vehicle, we strongly recommend that
you have a service technician or towing service do it ...