Hyundai Ioniq: Forward Collision-Avoidance Assist (FCA) system / Limitations of the System

Hyundai Ioniq (AE) 2017-2021 Owner's Manual / Driving your vehicle / Forward Collision-Avoidance Assist (FCA) system / Limitations of the System

The Forward Collision-Avoidance Assist (FCA) system is designed to help monitor the vehicle ahead or a pedestrian in the roadway through radar signals and camera recognition to warn the driver that a collision is imminent, and if necessary, apply emergency braking.

In certain situations, the radar sensor or the camera may not be able to detect the vehicle or pedestrian ahead. In these cases, the FCA system may not operate normally. The driver must pay careful attention in the following situations where the FCA operation may be limited.

Detecting vehicles

The sensor may be limited when:

  • The radar sensor or camera is blocked with a foreign object or debris
  • Inclement weather such as heavy rain or snow obscures the field of view of the radar sensor or camera
  • There is interference by electromagnetic waves
  • There is severe irregular reflection from the radar sensor
  • The radar/camera sensor recognition is limited
  • The vehicle in front is too small to be detected (for example a motorcycle or a bicycle, etc.)
  • The vehicle in front is an oversize vehicle or trailer that is too big to be detected by the camera recognition system (for example a tractor trailer, etc.)
  • The driver's field of view is not well illuminated (either too dark or too much reflection or too much backlight that obscures the field of view)
  • The vehicle in front does not have their rear lights properly turned ON
  • The outside brightness changes suddenly, for example when entering or exiting a tunnel
  • Light coming from a street light or an oncoming vehicle is reflected on a wet road surface such as a puddle in the road
  • The field of view in front is obstructed by sun glare
  • The windshield glass is fogged up; a clear view of the road is obstructed
  • The vehicle in front is driving erratically
  • The vehicle is on unpaved or uneven rough surfaces, or road with sudden gradient changes.
  • The vehicle is driven near areas containing metal substances as a construction zone, railroad, etc.
  • The vehicle drives inside a building, such as a basement parking lot
  • The adverse road conditions cause excessive vehicle vibrations while driving
  • The sensor recognition changes suddenly when passing over a speed bump
  • The vehicle in front is moving vertically to the driving direction
  • The vehicle in front is stopped vertically
  • The vehicle in front is driving towards your vehicle or reversing

Hyundai Ioniq. Limitations of the System

- Driving on a curve

The performance of the FCA system may be limited when driving on a curved road.

On curved roads, the other vehicle on the same lane is not recognized and the FCA system's performance may be degraded. This may result in unnecessary alarm or braking or no alarm or braking when necessary.

Also, in certain instances the front radar sensor or camera recognition system may not detect the vehicle traveling on a curved road.

In these cases, the driver must maintain a safe braking distance, and if necessary, depress the brake pedal to reduce your driving speed in order to maintain a safe distance.

Hyundai Ioniq. Limitations of the System

The FCA system may recognize a vehicle in the next lane when driving on a curved road.

In this case, the system may unnecessarily alarm the driver and apply the brake.

Always pay attention to road and driving conditions, while driving. If necessary, depress the brake pedal to reduce your driving speed in order to maintain a safe distance.

Also, when necessary depress the accelerator pedal to prevent the system from unnecessarily decelerating your vehicle.

Check the surrounding traffic conditions before use.

Hyundai Ioniq. Limitations of the System

- Driving on a slope

The performance of the FCA decreases while driving upward or downward on a slope, not recognizing the vehicle in front in the same lane. It may unnecessarily produce the warning message and the warning alarm, or it may not produce the warning message and the warning alarm at all.

When the FCA suddenly recognizes the vehicle in front while passing over a slope, you may experience sharp deceleration.

Always keep your eyes forward while driving upward or downward on a slope, and, if necessary, depress the brake pedal to reduce your driving speed in order to maintain distance.

Hyundai Ioniq. Limitations of the System

- Changing lanes

When a vehicle changes lanes in front of you, the FCA system may not immediately detect the vehicle, especially if the vehicle changes lanes abruptly. In this case, you must maintain a safe braking distance, and if necessary, depress the brake pedal to reduce your driving speed in order to maintain a safe distance.

Hyundai Ioniq. Limitations of the System

When driving in stop-and-go traffic, and a stopped vehicle in front of you merges out of the lane, the FCA system may not immediately detect the new vehicle that is now in front of you. In this case, you must maintain a safe braking distance, and if necessary, depress the brake pedal to reduce your driving speed in order to maintain a safe distance.

Hyundai Ioniq. Limitations of the System

- Detecting the vehicle in front of you

If the vehicle in front of you has cargo that extends rearward from the cab, or when the vehicle in front of you has higher ground clearance, additional special attention is required. The FCA system may not be able to detect the cargo extending from the vehicle. In these instances, you must maintain a safe braking distance from the rearmost object, and if necessary, depress the brake pedal to reduce your driving speed in order to maintain distance.

System Malfunction

Check Forward Collision Avoidance Assist system When the FCA is not working properly, the FCA warning light () will illuminate and the warning message will appear for a few seconds...

Detecting pedestrians

The sensor may be limited when: The pedestrian is not fully detected by the camera recognition system, for example, if the pedestrian is leaning over or is not fully walking upright The pedestrian is moving very quickly or appears abruptly in the camera detection area The pedestrian is wearing clothing that easily blends into the background, making it difficult to be detected by the camera recognition system It is difficult to detect and distinguish the pedestrian from other objects in the surroundings, for example, when there is a group of pedestrians or a large crowd There is an item similar to a person’s body structure The pedestrian is small The pedestrian has impaired mobility The sensor recognition is limited The radar sensor or camera is blocked with a foreign object or debris Inclement weather such as heavy rain or snow obscures the field of view of the radar sensor or camera The outside lighting is too bright (e...

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Manual adjustment

The front seat can be adjusted by using the levers located on the outside of the seat cushion. Before driving, adjust the seat to the proper position so that you can easily control the steering wheel, foot pedals and controls on the instrument panel.

Forward and rearward adjustment

Hyundai Ioniq. Manual adjustment

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