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: TPMS Receiver. Repair procedures

Removal1.Disconnect the negative (-) battery terminal.2.Remove the glove box.(Refer to Body - "Glove Box Upper Cover Assembly")3.Remove the smart key unit.(Refer to Body - "Smart Key Unit")4.Disconnect the body control module connectors (A).5.Remove the body control module (A) after loosening the mounting nuts...

Hyundai Ioniq (AE) 2017-2025 Service Manual: High Pressure Fuel Pump. Repair procedures

Removal • In case of removing the high pressure fuel pump, high pressure fuel pipe, delivery pipe, and injector, there may be injury caused by leakage of the high pressure fuel. So don’t do any repair work right after engine stops...