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Rear cross-traffic collision-avoidance assist malfunction and limitations

Rear Cross-Traffic Collision-Avoidance Assist malfunction
2025 Hyundai Tucson instrument cluster warning message image. The screen displays the text 'Check driver assistance system.' in white with a triangle warning icon containing an exclamation mark. This explains the warning displayed when the Rear Cross-Traffic Collision-Avoidance Assist malfunctions.

2C_DriverAssistanceMalfunction

When Rear Cross-Traffic Collision-Avoidance Assist is not working properly, the 'Check driver assistance system' warning message appears on the instrument cluster for several seconds, and the master (X) warning light illuminates on the instrument cluster. If this occur, we recommend that your vehicle be inspected by an authorized HYUNDAI dealer.

2025 Hyundai Tucson outside rearview mirror warning message image. The instrument cluster screen displays the text 'Check outside mirror warning icon' and a triangle warning symbol with an exclamation mark. It explains the warning message that appears when the outside rearview mirror warning light is not working properly.

2C_CheckSideViewMirrorWarningLightInfo

When the outside rearview mirror warning light is not working properly, the 'Check outside rearview mirror warning icon' or 'Check sideview mirror warning light' warning message appears on the instrument cluster for several seconds, and the master (X) warning light illuminates on the cluster. If this occur, we recommend that your vehicle be inspected by an authorized HYUNDAI dealer.

Rear Cross-Traffic Collision-Avoidance Assist disabled
2025 Hyundai Tucson instrument cluster warning message image. The screen displays the text 'Driver assistance system limited. Radar block.' in white on a dark background. Explains the alert shown when the Rear Cross-Traffic Collision-Avoidance Assist is limited due to blocked sensors.

2C_DriverAssistanceLimitedRadar

When the rear bumper around the rear-side radar or sensor is covered with foreign material, such as snow or rain, or installing a trailer or carrier, it can reduce the detecting performance and temporarily limit or disable Rear Cross-Traffic Collision-Avoidance Assist.

If this occurs, the 'Driver assistance system limited. Radar blocked.' warning message appears on the instrument cluster.

Rear Cross-Traffic Collision-Avoidance Assist operates properly when such foreign material or trailer, etc., is removed.

If Rear Cross-Traffic Collision-Avoidance Assist does not operate properly after it is removed, we recommend that your vehicle be inspected by an authorized HYUNDAI dealer.

  • Even though the warning message does not appear on the cluster, Rear Cross-Traffic Collision-Avoidance Assist may not operate properly.

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

Turn off Rear Cross-Traffic Collision-Avoidance Assist to install or remove a trailer, carrier, or another attachment. Turn on Rear Cross-Traffic Collision-Avoidance Assist when finished.

Limitations of Rear Cross-Traffic Collision-Avoidance Assist

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

  • Departing from where trees or grass are overgrown

  • Departing from where roads are wet

  • Speed of the approaching vehicle is fast or slow

Braking control may not work, driver's attention is required in the following circumstances:

  • The vehicle severely vibrates while driving over a bumpy road, uneven road or concrete patch

  • Driving on a slippery surface due to snow, water puddle, ice, etc.

  • The tire pressure is low or a tire is damaged

  • The braking system has been modified

  • Remote Smart Parking Assist is operating (if equipped)

  • Driving near a vehicle or structure

    2025 Hyundai Tucson Rear Cross-Traffic Collision-Avoidance Assist limitation image. A top-down view shows a white vehicle backing out of a parking space next to a structure labeled (A). Arrows indicate vehicles approaching from the left and right. This explains the limitation where the system may not detect approaching vehicles due to the structure (A) blocking the view.

    2C_RCCADrivingNearVehicle

    1. Structure

    Rear Cross-Traffic Collision-Avoidance Assist may be limited when driving near a vehicle or structure, and may not detect the vehicle approaching from the left or right. If this occurs, the function may not warn the driver or control the brakes when necessary.

    Always check your surroundings while backing up.

  • When the vehicle is in a complex parking environment

    2025 Hyundai Tucson Rear Cross-Traffic Collision-Avoidance Assist complex parking image. A white vehicle backs out with a straight black arrow, while curved arrows indicate other vehicles moving or turning nearby. This explains the limitation where the system may unnecessarily warn the driver in complex parking environments.

    2C_RCCAVehicleInParkingLot

    Rear Cross-Traffic Collision-Avoidance Assist may detect vehicles which are parking or pulling out near your vehicle (for example, a vehicle leaving beside your vehicle, a vehicle parking or pulling out in the rear area, a vehicle approaching your vehicle making a turn, etc.). If this occurs, the function may unnecessarily warn the driver and control the brake.

    Always check your surroundings while backing up.

  • When the vehicle is parked diagonally

    2025 Hyundai Tucson Rear Cross-Traffic Collision-Avoidance Assist limitation image. A white vehicle backs out of a diagonal spot with arrows showing approaching traffic. It illustrates how adjacent cars block the radar, explaining why the system may not detect vehicles when parking diagonally.

    2C_RCCAParkDiagonally

    Rear Cross-Traffic Collision-Avoidance Assist may be limited when backing up diagonally, and may not detect the vehicle approaching from the left or right. If this occurs, the function may not warn the driver or control the brakes when necessary.

    Always check your surroundings while backing up.

  • When the vehicle is on or near a slope

    2025 Hyundai Tucson Rear Cross-Traffic Collision-Avoidance Assist limitation image. A vehicle backs up a slope, indicated by a black arrow, and the radar beam passes over a nearby vehicle due to the incline. Explains the limitation where the system may not detect vehicles on or near a slope.

    2C_RCCANearSlope

    Rear Cross-Traffic Collision-Avoidance Assist may be limited when the vehicle is on a uphill or downhill slope, or near it, and may not detect the vehicle approaching from the left or right. If this occurs, the function may not warn the driver or control the brakes when necessary.

    Always check your surroundings while backing up.

  • Pulling into the parking space where there is a structure

    2025 Hyundai Tucson Rear Cross-Traffic Collision-Avoidance Assist limitation image. A white vehicle backs towards a wall (B) next to a structure (A) that blocks the radar view. A dark vehicle approaches from the right. Explains how obstacles limit the system's ability to detect cross-traffic.

    2C_RCCAThereIsStructure

    1. Structure
    2. Wall

    Rear Cross-Traffic Collision-Avoidance Assist may detect vehicles passing by in front of you when parking in reverse into a parking space with a wall or structure in the rear or side area. If this occurs, the function may unnecessarily warn the driver and control the brake.

    Always check your surroundings while backing up.

  • When the vehicle is parked rearward

    2025 Hyundai Tucson Rear Cross-Traffic Collision-Avoidance Assist image. A white vehicle backs out of a parking space, indicated by a black arrow, while a dark vehicle approaches from the right side. This illustrates the function detecting approaching vehicles from the side while reversing.

    2C_RCCAParkRearward

    Rear Cross-Traffic Collision-Avoidance Assist may detect vehicles passing by behind you when parking in reverse into a parking space. If this occurs, the function may unnecessarily warn the driver and control the brake.

    Always check your surroundings while backing up.

  • When you are towing a trailer or turn off Rear Cross-Traffic Collision-Avoidance Assist for safety reasons.

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

  • Rear Cross-Traffic Collision-Avoidance Assist may not operate for 3 seconds after the vehicle is started, or the rear corner radars are initialized.

For more information on the limitations of the rear corner radar, refer to the "Blind-Spot Collision-Avoidance Assist (BCA)" section in this chapter.