To lock :
1. Close all doors, engine hood and tailgate.
2. Either press the door handle button or press the Door Lock button (1) on the smart key.
3. The hazard warning lights will blink and the chime will sound once.
4. Make sure the doors are locked by checking the position of the door lock button inside the vehicle.
✽ NOTICE
The door handle button will only operate when the smart key is within 28~40 in. (0.7~1 m) from the outside door handle.
Even though you press the outside door handle button, the doors will not lock and the chime will sound for three seconds if any of the following occur:
WARNING
Do not leave the Smart Key in your vehicle with unsupervised children. Unattended children could press the Engine Start/ Stop button and may operate power windows or other controls, or even make the vehicle move, which could result in serious injury or death.
Hyundai Tucson (LM) 2010-2015 Owners Manual: Hazardous driving conditions
When hazardous driving conditions are encountered such as water, snow, ice, mud
or sand:
Drive cautiously and allow extra distance for braking.
Avoid sudden movements in braking or steering.
If stuck in snow, mud, or sand, use second gear. Accelerate slowly to avoid spinning
the drive wheels. ...
Hyundai Tucson (LM) 2010-2015 Service Manual: Side Impact Sensor (SIS) Description and Operation
Description
Side Impact Sensor (SIS) system consists of two P-SIS which
are installed at each center of the front door module (LH and RH) and
two SIS which are installed at each center pillar nearby (LH and RH).
Side Pressure Sensor is also called P-SIS because that detects pressure due to c ...