Hyundai Tucson: Cruise control operation / Cruise control will be canceled when

Hyundai Tucson (LM) 2010-2015 Owners Manual / Driving your vehicle / Cruise control system / Cruise control operation / Cruise control will be canceled when

Depressing the brake pedal.
Pressing the CANCEL switch located on the steering wheel.
Pushing the cruise ON/OFF button. Both the CRUISE indicator and the SET indicator will turn OFF.
Moving the shift lever into N (Neutral).
Decreasing the vehicle speed lower than the memory speed by 9 mph (15 km/h).
Decreasing the vehicle speed to less than approximately 25 mph (40 km/h).
The ESC is operating.
Downshifting to the 2nd gear with sports mode.

✽ NOTICE

Each of the above actions will cancel cruise control operation (the SET indicator light in the instrument cluster will go off), but only pressing the cruise ON/OFF button will turn the system off. If you wish to resume cruise control operation, push the lever up (to RES+) located on your steering wheel. You will return to your previously preset speed, unless the system was turned off using the cruise ON/OFF button.

To temporarily accelerate with the cruise control ON

Depress the accelerator pedal.When you take your foot off the accelerator, the vehicle will return to the previously set speed. If you push the lever (1) down (to SET-) at the increased speed, the ...

To resume preset cruising speed

Push the lever (1) up (to RES+). If the vehicle speed is over 25 mph (40 km/h), the vehicle will resume the preset speed. ...

Other information:

Hyundai Tucson (LM) 2010-2015 Service Manual: Flow Diagram
Power Flow Chart P,NUD/BLR/B26/B35R/COD/COWCx x Direction of Rotation xLower & Reverse Brake (LR/B) Activation > Overdrive (O/D) Hub Lock > Mid & Rear P/C Lock xInput Shaft Rotation > Rear Sun Gear Rotation > Rear Inner Pinion Rotation (Reverse) > Rear Outer Pinion Rotation > R ...

Hyundai Tucson (LM) 2010-2015 Owners Manual: Electronic Stability Control (ESC)
The Electronic Stability Control (ESC) system helps to stabilize the vehicle during cornering maneuvers. ESC checks where you are steering and where the vehicle is actually going. ESC applies braking pressure to any one of the vehicle’s brakes and intervenes in the engine management sys ...