Driver Assistance System

Rear Cross-Traffic Collision-Avoidance Assist Malfunction and Limitations

~5min read

Rear Cross-Traffic Collision-Avoidance Assist Evasive Steering Assist Malfunction

If the Rear Cross-Traffic Collision-Avoidance Assist or other related functions do not operate properly, the warning message "Check Rear Safety Assist System" may appear on the instrument cluster and the Rear Cross-Traffic Collision-Avoidance Assist system may be turned off automatically. Have the system inspected by an authorized HYUNDAI dealer.

Rear Cross-Traffic Collision-Avoidance Assist Disabled

The warning message "Rear Camera Error or Blocked" or "Parking Sensor Error or Blocked" may appear on the instrument cluster if:

  • The rear view camera or rear ultrasonic sensor(s) is covered or blocked by snow or rain.
  • Severe weather conditions, such as heavy snow or heavy rain, may cause the Rear Cross-Traffic Collision-Avoidance Assist system to turn off or malfunction. Make sure the rear view camera and rear ultrasonic sensors are clean.

Rear Cross-Traffic Collision-Avoidance Assist Limitations

Rear Cross-Traffic Collision-Avoidance Assist may not provide braking assist or may not warn you even when pedestrians or objects are present if:

  • Any non-genuine equipment or accessory is installed on the rear of your vehicle.
  • Your vehicle is damaged due to a collision or other causes.
  • The bumper height or the installation position of the rear ultrasonic sensors has been changed.
  • The rear view camera or rear ultrasonic sensor(s) is damaged.
  • The rear view camera or rear ultrasonic sensor(s) is covered or blocked by snow, water or dirt.
  • The surroundings are very bright or dark.
  • The weather is very hot or cold.
  • The wind speed is greater than 20 km/h or blows perpendicular to the rear bumper.
  • Objects that generate excessive noise, such as car horns, loud motorcycle engines or truck air brakes, are near your vehicle.
  • An ultrasonic sensor with a similar frequency is near your vehicle.
  • The road surface is slippery or sloped.
  • There is a difference in height between your vehicle and the pedestrian.
  • The pedestrian blends into the background when viewed through the rear view camera.
  • The pedestrian is located at the rear edge of your vehicle.
  • The pedestrian is not standing upright.
  • The pedestrian is very short or very tall.
  • The pedestrian is wearing clothing that easily blends into the background, making them difficult to detect.
  • The pedestrian is wearing clothing that does not reflect ultrasonic waves well.
  • The size, thickness, height or shape of the object does not reflect ultrasonic waves well (for example, a pole, bush, curb, shopping cart, wall edge, etc.).
  • The pedestrian or object is moving very fast.
  • The pedestrian or object is very close to the rear of your vehicle.
  • There is a pedestrian or object behind a wall.
  • The object is not located at the center of the rear of your vehicle.
  • The object is not parallel to the rear bumper.
  • The road surface is slippery or sloped.
  • The pedestrian is in a position that is difficult to detect.
  • You start reversing the vehicle immediately after shifting to R (Reverse).
  • You accelerate your vehicle or drive in circles.

Rear Cross-Traffic Collision-Avoidance Assist may warn you unnecessarily or provide braking assist even when there are no pedestrians or objects if:

  • Any non-genuine equipment or accessory is installed on the rear of your vehicle.
  • Your vehicle is damaged due to a collision or other causes.
  • The bumper height or the installation position of the rear ultrasonic sensors has been changed.
  • Your vehicle height is lower or higher than normal due to heavy loads, abnormal tire pressure, etc.
  • The rear view camera or rear ultrasonic sensor(s) is covered or blocked by snow, water or dirt.
  • A pattern on the road is mistaken for a pedestrian.
  • There are shadows or light reflecting on the ground.
  • Objects that generate excessive noise, such as car horns, loud motorcycle engines or truck air brakes, are near your vehicle.
  • Your vehicle is reversing into a narrow passage or parking space.
  • Your vehicle is reversing onto an uneven road surface, such as a dirt road, gravel, speed bump, slope, etc.
  • A vehicle towing a trailer or a tow hitch-mounted object is located behind your vehicle.
  • An ultrasonic sensor with a similar frequency is near your vehicle.
  • Pedestrians or objects are located near the path of your vehicle.
  • The pedestrian or object is moving very fast.
  • You accelerate your vehicle or drive in circles.

WARNING

Rear Cross Traffic Collision-Avoidance Assist may not operate in all situations and cannot prevent all collisions. To avoid serious injury or death:

  • Always pay attention to the road and driving conditions while driving. Brake as necessary to avoid collisions. Do not rely solely on Rear Cross Traffic Collision-Avoidance Assist to prevent collisions.
  • Always inspect your vehicle to make sure there are no pedestrians or objects before reversing.
  • Rear Collision-Avoidance Assist performance may differ under certain conditions. If your vehicle speed exceeds 2 mph (4 km/h), Rear Collision-Avoidance Assist provides collision-avoidance assistance only when pedestrians are detected.
  • Some objects may not be detected by the rear ultrasonic sensors due to the distance to the object, its size, or its material.

WARNING

  • A noise may be heard when sudden braking occurs to avoid a collision.
  • When another system's warning message appears or a warning sound is heard, Rear Collision-Avoidance Assist may not warn you.
  • You may not hear the Rear Collision-Avoidance Assist warning sound if the surrounding environment is too noisy.
  • Rear Collision-Avoidance Assist may not operate properly if the bumper has been damaged, replaced, or repaired.
  • Rear Collision-Avoidance Assist may not operate normally if there is interference from strong electromagnetic waves.
  • Deactivating Rear Collision-Avoidance Assist - Trailer Towing. When towing a trailer and reversing, Rear Collision-Avoidance Assist activates when it detects a trailer.
  • Brake control may not operate properly depending on the ESC (Electronic Stability Control) condition. The warning appears only when:
    - The ESC (Electronic Stability Control) indicator light is on.
    - The ESC (Electronic Stability Control) is controlling braking force to the wheel.
  • Check the brake fluid and brake pad condition periodically. Depending on the condition, brake performance may decrease.

Information

Rear Collision-Avoidance Assist may not detect or may miss a pedestrian or object when:

  • A pedestrian is standing behind the vehicle.
  • A large obstacle, such as a vehicle parked directly behind the center of your vehicle.

Test yourself

A quick Hyundai Tucson LM quiz: every answer comes with an explanation and a link to the manual page.