TUCSON(LM) >2011 > G 2.0 DOHC > Brake System > ESC(Electronic Stability Control) System > DBC Switch >Description and Operation  
Description
The DBC function is the acronym word of Downhill Brake Control function. When a vehicle goes down the hill, just pushing the DBC switch enables the car to keep its vehicle's speed at a constant value without operating the brake pedal. The DBC function is operated when the vehicle is on the decline and its velocity is under the predetermined speed.