If the Smart Key does not operate normally, you can lock or unlock the door by using the mechanical key.

Press and hold the release button (1) and remove the mechanical key (2). Insert the mechanical key in to the key hole on the door.
To reinstall the mechanical key, put the key into the hole and push it until a click sound is heard.
Start-up
Loss of a smart keyHyundai Tucson (LM) 2010-2015 Service Manual: Timing Chain Components and Components Location
Components
1. Intake camshaft2. Exhaust camshaft3. Intake CVVT assembly4. Exhaust CVVT assembly5. Timing chain6. Timing chain tensioner arm7. Timing chain tensioner8. Timing chain guide9. Timing chain cover10. Service plug bolt & gasket11. Front oil seal12. Crankshaft damper pulley
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Hyundai Tucson (LM) 2010-2015 Service Manual: Variable Intake Solenoid (VIS) Valve Description and Operation
Description
Variable Intake manifold Solenoid (VIS) valve is installed on
the intake manifold. The VIS valve controls the vacuum modulator which
activates a valve in the intake manifold. The ECM opens or closes this
valve according to engine condition (Refer to below table).
Engine condi ...