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Home > Driving your vehicle > Forward Collision-Avoidance Assist (FCA) (Sensor fusion) > Limitations of Forward Collision-Avoidance Assist

Limitations of Forward Collision-Avoidance Assist

Forward Collision-Avoidance Assist is designed to monitor the vehicle ahead 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, pedestrian or cyclist ahead. In these cases, Forward Collision-Avoidance Assist may not operate normally. The driver must pay careful attention in the following situations where Forward Collision-Avoidance Assist operation may be limited.

Limitations of the sensors

The sensor may be limited when:

  • The camera lens is covered due to tinted, filmed or coated windshield, damaged glass, or stuck of foreign matter (sticker, bug, etc.) on the glass.

  • The radar sensor or camera is covered 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.

  • Something in the path of travel deflects the radar waves.

  • The front view camera/front radar sensor recognition is limited.

  • The vehicle in front is too small to be detected. (for example a motorcycle etc.)

  • The vehicle in front is an oversize vehicle or trailer that is too big to be detected by the camera recognition function. (for example a tractor trailer, etc.)

  • The front view camera'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 on or their rear lights are located unusually.

  • The outside brightness changes suddenly, for example when entering or exiting a tunnel.

  • When 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.

  • 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 camera does not recognize the entire vehicle in front.

  • The camera is damaged.

  • The brightness outside is too low such as when the headlamps are not on at night or the vehicle is going through a tunnel.

  • A shadow is on the road by a median strip, trees, etc.

  • The vehicle drives through a tollgate.

  • The rear part of the vehicle in front is not fully visible.

  • 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.

  • You are on a roundabout and the vehicle in front circles.

Driving on a curved road

The performance of Forward Collision-Avoidance Assist may be limited when driving on a curved road.

The front view camera or radar sensor recognition function may not detect the vehicle, pedestrian or cyclist traveling in front on a curved road. This may result in no alarm and braking when necessary.

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

Forward Collision-Avoidance Assist may recognize a vehicle or pedestrian or cyclist in the next lane or outside the lane when driving on a curved road.

If this occurs, the function may unnecessarily alarm the driver and apply the brake.

Always pay attention to road and driving conditions, while driving.

Driving on a sloped road

The performance of Forward Collision-Avoidance Assist may be decreased while driving upward or downward on a slope. The front view camera or front radar sensor recognition may not detect the vehicle, pedestrian or cyclist in front.

This may result in unnecessary alarm and braking or no alarm and braking when necessary.

When the function suddenly recognizes the vehicle, pedestrian or cyclist 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.

Changing lanes

When a vehicle changes lanes in front of you, Forward Collision-Avoidance Assist 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.

When driving in stop-and-go traffic, and a stopped vehicle in front of you merges out of the lane, Forward Collision-Avoidance Assist 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.

Recognizing the vehicle

When the vehicle in front has heavy loading extended rearward, or when the vehicle in front has higher ground clearance, it may induce a hazardous situation. Always pay attention to road and driving conditions, while driving and, if necessary, depress the brake pedal to reduce your driving speed in order to maintain distance.

Recognizing pedestrian or cyclist

Be cautious in the following situations, as the pedestrian or cyclist may not be detected by the function.

  • The pedestrian or cyclist is not fully captured by the camera sensor, or the pedestrian does not walk in the upright position.

  • The pedestrian or cyclist moves very fast.

  • The pedestrian or cyclist abruptly appears in front.

  • The pedestrian or cyclist wears clothes in the color similar to the background.

  • The outside is too bright or too dark.

  • The vehicle drives at night or in the darkness.

  • There is an item similar to a person's body structure.

  • The pedestrian or cyclist is small.

  • The pedestrian or cyclist has impaired mobility.

  • It is difficult to distinguish the pedestrian or cyclist from the surroundings.

  • The sensor recognition is limited due to weather conditions.

  • There is a group of pedestrian or cyclist.

  • If a sudden change in the sensor recognition takes place while passing through the speed bump.

  • When the vehicle is severely shaken due to adverse road conditions.

  • When driving around circular intersection with a vehicle in front.

  • If the front of the camera lens is covered by front glass tinting, film, water repellent coating, damage on glass, foreign matter (sticker, insect, etc.)

  • The front view camera or camera lens or front radar is damaged.

  • If the headlights of the vehicle are not used at night or in the tunnel section, or the light is too weak.

  • If street light or the light of the vehicle coming from the opposite is reflected or when sunlight is reflected by the water on the road surface.

  • If the windshield has moisture on its surface or if windshield freezes.

  • Driving in the fog.

  • When objects are out of the sensing range of the sensor or radar.

  • When the cyclist in front is riding intersects with the driving direction.

  • When there is any electromagnetic interference.

  • When a construction area, rail or other metal object is near the pedestrian or cyclist.

  • If the bicycle material is not reflected well on the radar.

WARNING
  • Cancel Forward Collision-Avoidance Assist in the User Settings on the LCD display, before towing another vehicle. While towing, the brake application may adversely affect your vehicle safety.

  • Exercise extreme caution to the vehicle in front, when it has heavy loading extended rearward, or when it has higher ground clearance.

  • When replacing or reinstalling the windshield, front bumper or front view camera/front radar after removal, take your vehicle to an authorized Kia dealer and have the function checked.

WARNING
  • Forward Collision-Avoidance Assist is designed to detect and monitor the vehicle ahead or detect pedestrian or cyclist in the roadway through radar signals and camera recognition. It is not designed to detect bicycles, motorcycles, or smaller wheeled objects such as luggage bags, shopping carts, or strollers.

  • Never try to test the operation of Forward Collision-Avoidance Assist. Doing so may cause severe injury or death.

NOTICE

In some instances, Forward Collision-Avoidance Assist may be canceled when subjected to electromagnetic interference.