I: Grade Control

I: GRADE CONTROL
While a vehicle is driving up a hill, gear position is fixed to 3rd gear for avoiding busy up and down shift between 3rd-4th gears.

When a vehicle is descending a steep hill under the designated vehicle speed (approximately 50 miles/hour), 4th gear downshifts to 3rd gear automatically by depressing the brake pedal. This gearshift control is released by re-accelerating with depressing the accelerator pedal. These controls are doing this based on the combination of throttle opening angle, engine speed, vehicle speed and so on.