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

Hyundai Ioniq (AE) 2017-2025 Owner's Manual / Driving your vehicle / Braking System / Hill-Start Assist Control (HAC)

The Hill-Start Assist Control (HAC) helps prevent the vehicle from rolling backwards when starting a vehicle from a stop on a hill. The system operates the brakes automatically for approximately 2 seconds and releases the brake after 2 seconds or when the accelerator pedal is depressed.

WARNING

Always be ready to depress the accelerator pedal when starting off on a incline.The HAC activates only for approximately 2 seconds.

NOTICE

The HAC does not operate when the shift lever is in P (Park) or N (Neutral).
The HAC activates even though the ESC (Electronic Stability Control) is off but does not activate when the ESC has malfunctioned.

Vehicle Stability Management (VSM)

The Vehicle Stability Management (VSM) is a function of the Electronic Stability Control (ESC) system. It helps ensure the vehicle stays stable when accelerating or braking suddenly on wet, slippery and rough roads where traction over the four tires can suddenly become uneven...

Good Braking Practices

WARNING Whenever leaving the vehicle or parking, always come to a complete stop and continue to depress the brake pedal. Move the shift lever into P (Park) position, then apply the parking brake, and place the Engine Start/Stop button in the OFF position...

Other information:

Hyundai Ioniq (AE) 2017-2025 Service Manual: Repair procedures

Replacement • Put on gloves to prevent hand injuries. • When removing with a flat-tip screwdriver or remover, wrap protective tape around the tools to prevent damage to components...

Hyundai Ioniq (AE) 2017-2025 Service Manual: Front Seat Back Cover. Repair procedures