Warning Condition

1. The entire body of the target vehicle is located behind the line A.
2. Any part of the target vehicle pass the line B.
3. Any part of the target vehicle passes the line D and Hysteresis In.
4. The entire part of the target vehicle passes the line E and Hysteresis In.

Fig 2: Identifying Conditions For BSD Warning ON

Courtesy of KIA MOTORS AMERICA, INC.

1. The entire body of the target vehicle moves before the line A.
2. The entire body of the target vehicle moves behind the line B.
3. The entire body of the target vehicle passes the line D and Hysteresis Out.
4. The entire part of the target vehicle passes the line E and Hysteresis Out.
Fig 3: Identifying Conditions For BSD Warning OFF
Courtesy of KIA MOTORS AMERICA, INC.

1. The entire body of the target vehicle is located behind the line B.
2. Any part of the target vehicle pass the line C.
3. Any part of the target vehicle passes the line D and Hysteresis In.
4. The entire part of the target vehicle passes the line E and Hysteresis In.
5. In the all above condition, TTC (Time to Collision) is not less than 4.5 sec.
Fig 4: Identifying Conditions For LCA Warning ON
Courtesy of KIA MOTORS AMERICA, INC.

1. The entire body of the target vehicle is located before the line B.
2. The entire body of the target vehicle pass the line C.
3. The entire body of the target vehicle passes the line D and Hysteresis Out.
4. The entire body of the target vehicle passes the line E and Hysteresis Out.
5. In the all above condition, TTC (Time to Collision) is not more than 4.5 sec.

Fig 5: Identifying Conditions For LCA Warning OFF

Courtesy of KIA MOTORS AMERICA, INC.

1. BSD & LCA switch (indicated by the switch LED) is on.
2. Vehicle Speed: 30 km/h or faster
3. Curvature radius: 100m or more
4. Relative car speed: All except -10 ~ 250 km/h

("-" means overtaking the preceding vehicle)

1. BSD & LCA switch (indicated by the switch LED) is off.
2. Vehicle Speed: 28 km/h or slower
3. Curvature radius: 70m or less
4. Relative car speed: All except -10 ~ 250 km/h

("-" means overtaking the preceding vehicle)

1. The radar is covered by debris: System conditions - Blockage message is output

   Information 

   If the sensor on the rear bumper is contaminated by snow, mud or stickers, its detecting performance may be lowered.

2. The radar installation is damaged by an outside shock: Send the error code
3. BSD & LCA system fails: Send the error code
4. The radar is overheated: System conditions - Over Temperature message is output.

1. This function helps the driver to detect an approaching vehicle from the rear that cannot be visually identified when the driver drives in reverse to pull the vehicle out from a parking spot.
2. A warning is generated for the target vehicle if it is within two seconds based on TTC (Time to Collision). People are not considered as approaching targets when warning the driver. (A warning may not be generated.)
   NOTE: Time to Collision (TTC): This represents the expected elapsed time the target will impact the driver's vehicle by considering the relative distance and speed of the approaching vehicle. If it is less than 2.0 seconds, a warning is generated.
3. Warning zone is as shown in the following figure:

   Detection Range

Rear cross traffic alert (RCTA) When your vehicle moves backwards from parking lot, the sensor detects the approaching vehicles and gives information driver.

Fig 6: Identifying Rear Cross Traffic Alert (RCTA) Area

Courtesy of KIA MOTORS AMERICA, INC.

Operating conditions

• When the ignition is ON, if you press the BSD switch, the switch indicator illuminates and the system is on ready.
• The system is operated when the vehicle speed is below 10 km/h with R gear.
• The RCTA detecting range is 0.5m ~ 20m based on side direction. If the approaching vehicle speed is 4~36 km/h in sensing range, it is detected. However, the system sensing range is different base on conditions. Always pay attention to surrounding.

Warning type

Fig 7: Identifying Rear Cross Traffic Alert (RCTA) Range
Courtesy of KIA MOTORS AMERICA, INC.

• Curved roads, tollgates, etc.
• The surrounding of the sensor is polluted with rain, snow, mud, etc
• The rear bumper near the sensor is covered or hidden with a foreign matter such as a sticker, bumper guard, bicycle stand etc.
• The rear bumper is damaged or the sensor is out of place.
• The height of the vehicle shows much change such as when the trunk is loaded with heavy objects, abnormal tire pressure etc.
• Due to bad weather such as heavy rain or snow.
• A fixed object is near such as a guardrail, etc.
• A lot of amount of metal substances are near the vehicles such as a construction area.
• A big vehicle is near such as a bus or truck.
• A motorcycle or bicycle is near.
• A flat trailer like vehicle is near.
• When the other vehicle passes by very fast.
• When changing lanes.
• When going down or up a steep road where the height of the lane is different.
• When the other vehicle drives at the rear very nearby or drives very close.
• When a trailer or carrier is installed.
• When the temperature of rear bumper is high.
• When the sensors are covered by the vehicle, wall and pillar of parking lot.
• When your vehicle moves back, if the detected vehicle also moves back.
• If there is small things like shopping cart and baby carriage.
• If there is low height vehicle like spot vehicle.
• When the vehicle is close to your vehicle.

• Check for the condition of Bumper-Skin

- If Bumper-Skin is covered with some snow or dirt, a performance of warning system is risk for degradation.

• Check for Bumper surrounding

- If metal objects are near Radar-Sensor, false-alarm can be occurred.

• Check for Bumper-shape and Condition of installation

- If Bumper and Radar-Sensor is installed incorrectly, a performance of warning system is risk for degradation.

• Check for the installation condition of Bumper, Bracket and Radar-Sensor
• if Misalignment is occurred.

- Bumper : Installation condition, Cracks on the bumper

- Bracket : Modification, Disconnection, Bracket positioning

- Sensor mount : Screw loosened, Check for foreign object

• Check for Switch LED

- It's not fed into DTC because check for failure in disconnection and short-circuit is impossible.