Hyundai Tucson Owners & Service Manuals

Hyundai Tucson: Braking System / Hill-Start Assist Control (HAC)

Hill-Start Assist Control helps prevent the vehicle from rolling backwards when starting from a stop on a hill.


Always be ready to depress the accelerator pedal when starting from a stop on an uphill slope. Hill-Start Assist Control activates only for about 2 seconds.


  • Hill-Start Assist Control does not operate when the gear is shifted to P (Park) or N (Neutral).
  • Hill-Start Assist Control activates even when the ESC (Electronic Stability Control) is off. It does not activate, if the ESC is not operating normally.
    Trailer Stability Assist (TSA)
    Trailer Stability Assist is operated as a vehicle stability control system. The Trailer Stability Assist stabilizes the vehicle and trailer when the trailer sways or oscillates. In most cases, ...

    Downhill Brake Control (DBC)
    Downhill Brake Control assists when descending down a steep hill without having to depress the brake pedal. The system automatically applies the brakes to maintain vehicle speed below a cer ...

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