What is Hill-start Assist Control?

[MacLeo]

Hill-start Assist Control (HAC) is a system that applies braking force to all four wheels to prevent the vehicle from rolling backward, effectively reducing the risk of rollback accidents when parking on slopes. HAC, an acronym for Hill-start Assist Control, is a function derived from the ESP system. Below is more information about Hill-start Assist Control: Usage Conditions: The Hill-start Assist Control function can be activated when the gear lever is in any position other than P (for automatic transmission models), the parking brake is not engaged, the accelerator pedal is not pressed, and the vehicle is stationary, with the driver further depressing the brake pedal. Function: It assists in temporarily applying braking force to all four wheels (for a maximum of about 3 seconds) to prevent the vehicle from rolling backward.