Forward Collision-Avoidance Assist malfunction and limitations

Forward Collision-Avoidance Assist malfunction
2025 Hyundai Tucson Forward Collision-Avoidance Assist malfunction warning image. The instrument cluster displays the text 'Check driver assistance system.' and a triangle icon with an exclamation mark. Explains the warning message displayed when the system is not working properly.

2C_DriverAssistanceMalfunction

When Forward Collision-Avoidance Assist is not working properly, the "Check driver assistance system" warning message will appear, and the (X) and (Q) warning lights will illuminate on the cluster. We recommend that your vehicle be inspected by an authorized HYUNDAI dealer.

Forward Collision-Avoidance Assist disabled
2025 Hyundai Tucson dashboard warning message image. The screen displays the white text 'Driver assistance system limited. Camera obscured.' on a dark background. This explains the warning displayed when the front camera is blocked, limiting the driver assistance system.

2C_DriverAssistanceLimitedCamera

2025 Hyundai Tucson warning message screen image. The display shows the white text 'Driver assistance system limited. Radar block.' on a black background. Explains the warning displayed when the front radar is obstructed, limiting the Forward Collision-Avoidance Assist system.

2C_DriverAssistanceLimitedRadar

When the front windshield where the front view camera is located, front radar cover, bumper or sensor is covered with foreign material, such as snow or rain, it can reduce the detecting performance and temporarily limit or disable Forward Collision-Avoidance Assist.

If this occurs the "Driver assistance system limited. Camera obscured" or the "Driver assistance system limited. Radar blocked" warning message, and the (X) and (Q) warning lights will illuminate on the cluster.

Forward Collision-Avoidance Assist will operate properly when snow, rain or foreign material is removed.

If Forward Collision-Avoidance Assist does not operate properly after obstruction (snow, rain, or foreign material) is removed (including trailer, carrier, etc., from the rear bumper), we recommend that your vehicle be inspected by an authorized HYUNDAI dealer.

  • Even though the warning message or warning light does not appear on the cluster, Forward Collision-Avoidance Assist may not properly operate.

  • Forward Collision-Avoidance Assist may not properly operate in an area (for example, open terrain), where any objects are not detected after turning ON the engine.

Limitations of Forward Collision-Avoidance Assist

Forward Collision-Avoidance Assist may not operate properly, or it may operate unexpectedly under the following circumstances:

  • The detecting sensor or the surroundings are contaminated or damaged

  • The temperature around the front view camera is high or low due to surrounding environment

  • The camera lens is contaminated due to tinted, filmed or coated windshield, damaged glass, or sticky foreign material (sticker, bug, etc.) on the glass

  • Moisture is not removed or frozen on the windshield

  • Washer fluid is continuously sprayed, or the wiper is on

  • Driving in heavy rain or snow, or thick fog

  • The field of view of the front view camera is obstructed by sun glare

  • Street light or light from an oncoming traffic is reflected on the wet road surface, such as a puddle on the road

  • An object is placed on the dashboard

  • Your vehicle is being towed

  • The surrounding is very bright

  • The surrounding is very dark, such as in a tunnel, etc.

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

  • The brightness outside is low, and the headlamps are not on or are not bright

  • Driving through steam, smoke or shadow

  • Only part of the vehicle, powered two-wheeler pedestrian or cyclist is detected

  • The vehicle or powered two-wheeler in front is a bus, heavy truck, truck with an unusually shaped cargo, trailer, etc.

  • The vehicle or powered two-wheeler in front has no tail lights, tail lights are located unusually, etc.

  • The brightness outside is low, and the tail lamps are not on or are not bright

  • The rear of the front vehicle is small or the vehicle does not look normal, such as when the vehicle is tilted, overturned, or the side of the vehicle is visible, etc.

  • The front vehicle's ground clearance is low or high

  • A vehicle, powered two-wheeler, pedestrian or cyclist suddenly cuts in front

  • The bumper around the front radar is impacted, damaged or the front radar is out of position

  • The temperature around the front radar is high or low

  • Driving through a tunnel or iron bridge

  • Driving in vast areas where there are few vehicles or structures (for example, desert, meadow, suburb, etc.)

  • Driving near areas containing metal substances, such as a construction zone, railroad, etc.

  • A material is near that reflects very well on the front radar, such as a guardrail, nearby vehicle, etc.

  • The cyclist in front is on a bicycle made of material that does not reflect on the front radar

  • The vehicle or powered two-wheeler in front is detected late

  • The vehicle or powered two-wheeler in front is suddenly blocked by an obstacle

  • The vehicle or powered two-wheeler in front suddenly changes lane or suddenly reduces speed

  • The vehicle or powered two-wheeler in front is bent out of shape

  • The front vehicle or powered two-wheeler speed is fast or slow

  • The vehicle or powered two-wheeler in front steers in the opposite direction of your vehicle to avoid a collision

  • With a vehicle or powered two-wheeler in front, your vehicle changes lane at low speed

  • The vehicle in front is covered with snow

  • You are departing or returning to the lane

  • Unstable driving

  • You are on a round about and the vehicle or powered two-wheeler in front is not detected

  • You are continuously driving in a circle

  • The vehicle in front has an unusual shape

  • The vehicle in front is driving uphill or downhill

  • The pedestrian or cyclist is not fully detected, for example, if the pedestrian is leaning over or is not fully walking upright

  • The pedestrian or cyclist is wearing clothing or equipment that makes it difficult to detect

  • Rear wheel steering system (if equipped) is disabled

2025 Hyundai Tucson Forward Collision-Avoidance Assist detection targets image. The image displays black silhouettes of a car, a motorcycle, pedestrians, and cyclists. This illustrates the types of objects detected by the Forward Collision-Avoidance Assist system.

2C_FrontViewImage

The illustration above shows the image the front view camera and front radar are capable of detecting as a vehicle, powered two-wheeler, pedestrian and cyclist.

  • The pedestrian or cyclist in front is moving very quickly

  • The pedestrian or cyclist in front is short or is posing a low posture

  • The pedestrian or cyclist in front has impaired mobility

  • The pedestrian or cyclist in front is moving intersected with the driving direction

  • There is a group of pedestrians, cyclists or a large crowd in front

  • The pedestrian or cyclist is wearing clothing that easily blends into the background, making it difficult to detect

  • The pedestrian or cyclist is difficult to distinguish from the similarly shaped structure in the surroundings

  • You are driving by a pedestrian, cyclist, traffic signs, structures, etc., near the intersection

  • Driving in a parking lot

  • Driving through a tollgate, construction area, unpaved road, partial paved road, uneven road, speed bumps, etc.

  • Driving on an incline road, curved road, etc.

  • Driving through a roadside with trees or streetlights

  • The adverse road conditions cause excessive vehicle vibrations while driving

  • Your vehicle height is low or high due to heavy loads, abnormal tire pressure, etc.

  • Driving through a narrow road where trees or grass are overgrown

  • There is interference by electromagnetic waves, such as driving in an area with strong radio waves or electrical noise

  • The vehicle is installed with a snow chain, spare tyre or different size wheel.

  • Driving on a curved road

    2025 Hyundai Tucson Forward Collision-Avoidance Assist driving on a curve image. The image displays a white vehicle approaching a car and a motorcycle on a curved road in two separate panels. A grey triangular beam representing the sensor's detection range projects straight forward. This explains the limitation where the system may not detect a vehicle or motorcycle in front on a curved road.

    2C_FCADrivingOnCurveLoad

    2025 Hyundai Tucson Forward Collision-Avoidance Assist limitation image. Shows a vehicle on a curved road where the dark grey triangular sensor range projects straight, missing a pedestrian and a cyclist. Explains the limitation in detecting objects on curves.

    2C_FCADrivingOnCurveLoad_2

    Forward Collision-Avoidance Assist may not detect other vehicles, powered two-wheelers, pedestrians or cyclists in front of you when driving on curved roads adversely affecting the performance of the sensors. This may result in no warning, braking assist or steering assist (if equipped) when necessary.

    When driving on a curve, you must maintain a safe braking distance, and if necessary, steer the vehicle and depress the brake pedal to reduce your driving speed in order to maintain a safe distance.

    2025 Hyundai Tucson Forward Collision-Avoidance Assist image. The left panel shows a car and the right panel shows a motorcycle crossing the vehicle's path, both highlighted with white outlines within the sensor's detection cone. Explains the system limitation regarding vehicles or two-wheelers suddenly cutting in front.

    2C_FCADrivingOnCurveLoad_3

    2025 Hyundai Tucson Forward Collision-Avoidance Assist detection image. The left side shows a pedestrian and the right side shows a cyclist crossing the road in front of the white vehicle, both highlighted within the dark triangular sensor detection range. Explains the system's function of detecting pedestrians and cyclists.

    2C_FCADrivingOnCurveLoad_4

    Forward Collision-Avoidance Assist may detect a vehicle, powered two-wheeler, pedestrian or cyclist in the next lane or outside the lane when driving on a curved road.

    If this occurs, Forward Collision-Avoidance Assist may unnecessarily warn the driver and control the brake or steering wheel (if equipped). Always check the traffic conditions around the vehicle.

  • Driving on an inclined road

    2025 Hyundai Tucson Forward Collision-Avoidance Assist limitation image. A white SUV drives up a hill, and the sensor beam misses the vehicle ahead. Explains the limitation in detecting vehicles on inclined roads.

    2C_FCADrivingOnInclinedLoad

    2025 Hyundai Tucson Forward Collision-Avoidance Assist limitation image. A white SUV drives up a hill with a motorcycle over the crest. The sensor beam extends forward but misses the motorcycle due to the slope. Explains the limitation where the system may not detect vehicles ahead on inclined roads.

    2C_FCADrivingOnInclinedLoad_2

    2025 Hyundai Tucson Forward Collision-Avoidance Assist limitation on an inclined road image. A white SUV drives up a steep hill with a pedestrian walking ahead near the crest, positioned outside the sensor's detection range. Explains the limitation where the system may not detect objects on steep slopes.

    2C_FCADrivingOnInclinedLoad_3

    2025 Hyundai Tucson Forward Collision-Avoidance Assist limitation image. A white SUV drives up a steep hill with a cyclist at the top. The sensor beams project straight ahead, missing the cyclist. Explains the limitation where the system may not detect objects on inclined roads.

    2C_FCADrivingOnInclinedLoad_4

    Forward Collision-Avoidance Assist may not detect other vehicles, powered two-wheelers, pedestrians or cyclists in front of you while driving uphill or downhill, adversely affecting the performance of the sensors.

    This may result in unnecessary warning, braking assist or steering assist (if equipped) or no warning, braking assist or steering assist (if equipped) when necessary.

    Also, vehicle speed may rapidly decrease when a vehicle, powered two-wheeler, pedestrian or cyclist ahead is suddenly detected.

    Always have your eyes on the road while driving uphill or downhill and if necessary, steer your vehicle and depress the brake pedal to reduce your driving speed in order to maintain a safe distance.

  • Changing lanes

    2025 Hyundai Tucson Forward Collision-Avoidance Assist limitation image. Vehicle (A) is in the right lane, and vehicle (B) cuts in from the left, indicated by a black arrow. Explains the limitation when a vehicle suddenly changes lanes in front.

    2C_FCAChangingLane

    1. Your vehicle
    2. Lane changing vehicle

    When a vehicle moves into your lane from an adjacent lane, it cannot be detected by the sensor until it is in the sensor's detection range. Forward Collision-Avoidance Assist may not immediately detect the vehicle when the vehicle changes lanes abruptly. In this case, you must maintain a safe braking distance, and if necessary, steer your vehicle and depress the brake pedal to reduce your driving speed in order to maintain a safe distance.

    2025 Hyundai Tucson Forward Collision-Avoidance Assist cut-in scenario image. A dark vehicle (B) cuts in front of the white vehicle (A) from the adjacent lane, indicated by a curved black arrow. Illustrates a limitation where the system may detect a sudden lane change late.

    2C_FCAChangingLane_2

    1. Your vehicle
    2. Lane changing vehicle
    3. Same lane vehicle

    When a vehicle in front of you merges out of the lane, Forward Collision-Avoidance Assist may not immediately detect the vehicle that is now in front of you. In this case, you must maintain a safe braking distance, and if necessary, steer your vehicle and depress the brake pedal to reduce your driving speed in order to maintain a safe distance.

  • Detecting vehicle

    2025 Hyundai Tucson Forward Collision-Avoidance Assist limitation image. Shows the car approaching a truck with protruding pipes and a standard truck, with gray sensor cones. Explains detection limitations for vehicles with unusually shaped cargo.

    2C_FCADetectingVehicle

    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. Forward Collision-Avoidance Assist 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, steer your vehicle and depress the brake pedal to reduce your driving speed in order to maintain distance.

  • When you are towing a trailer or another vehicle, turn off Forward Collision-Avoidance Assist for safety reasons.

  • Forward Collision-Avoidance Assist may operate if objects that are similar in shape or characteristics to vehicles, powered two-wheelers, pedestrians and cyclists are detected.

  • Forward Collision-Avoidance Assist does not operate on bicycles, or smaller wheeled objects, such as luggage bags, shopping carts, or strollers.

  • Forward Collision-Avoidance Assist may not operate properly if interfered by strong electromagnetic waves.

  • Forward Collision-Avoidance Assist may not operate for 15 seconds after the vehicle is started, or the front view camera is initialized.

For limitations in the driver's blind spot areas and precautions for the rear corner radars, refer to the "Blind-Spot Collision-Avoidance Assist (BCA)" section in this chapter.