Kia Optima Hybrid: Blind Spot Detection System / Description and Operation

Description

The BSD (Blind Spot Detection) system uses a radar sensor to alert the driver while driving.
It senses the rear side territory of the vehicle and provides information to the driver.
BSD (Blind Spot Detection)
Warning range is dependent on your vehicle speed. However, if your vehicle speed is speedy about 10km/h than other vehicle, the warning is not operated.
LCA (Lane Change Assist)
When the vehicle is approaching to your vehicle at high speed, the warning is operated.
RCTA (Rear Cross Traffic Alert)
When your vehicle moves backward, the sensor detects the approaching vehicles and warning is operated.
System Operating Mode

1.
When starting the engine with the switch OFF, OFF mode is ON.
? The systems can be separately controlled based on each activation conditions. For example, BSD & LCA system is ON by BSD switch button and RCTA system is ON by RCTA USM switch.
2.
When pressing ON switch in OFF mode, Passive mode is ON.
3.
If starting the engine with the switch OFF, Passive mode is ON.
? When IGN is ON, the switch is in the initial state: The last position is kept.
If IGN OFF -> ON with the switch ON, the switch is ON.
If IGN OFF -> ON with the switch OFF, the switch is OFF.
4.
If you start the engine with BSD switch ON or if you turn on BSD & LCA with BSD switch off, the warning lamp of the door mirror turned on for 3 seconds.
5.
If the activation conditions (speed and curvature radius) are met while driving, Active mode is ON(warning issued).
6.
If the activation conditions (speed or curvature radius) are not met while driving, Passive mode is ON(warning suppressed).
7.
Depending on the detected errors, BSD & LCA system (including RCTA system) becomes Fail mode.
8.
If the detected error is removed, BSD & LCA system (including RCTA system) changes to the last mode before Fail mode.
9.
If pressing OFF switch while the system is running, the system becomes OFF mode.
? Since the systems controlled separately, only BSD & LCA system becomes OFF mode when pressing BSD switch OFF. And only RCTA system becomes OFF mode when choosing RCTA USM OFF.
Warning Condition
1.
Warning zone

2.
Conditions for BSD warning ON
The entire body of the target vehicle is located behind the line A.
Any part of the target vehicle pass the line B.
Any part of the target vehicle passes the line D and Hysteresis In.
The entire part of the target vehicle passes the line E and Hysteresis In.

3.
Conditions for BSD warning OFF
The entire body of the target vehicle moves before the line A.
The entire body of the target vehicle moves behind the line B.
The entire body of the target vehicle passes the line D and Hysteresis Out.
The entire part of the target vehicle passes the line E and Hysteresis Out.

4.
Conditions for LCA warning ON
The entire body of the target vehicle is located behind the line B.
Any part of the target vehicle pass the line C.
Any part of the target vehicle passes the line D and Hysteresis In.
The entire part of the target vehicle passes the line E and Hysteresis In.
In the all above condition, TTC(Time to Collision) is not less than 4.5 sec.

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

6.
Sensor activation conditions
BSD & LCA switch (indicated by the switch LED) is on.
Vehicle Speed: 30km/h or faster
Curvature radius: 100m or more
Relative car speed: All except -10 ~ 250?/h
("-" means overtaking the preceding vehicle)
7.
Sensor deactivation conditions
BSD & LCA switch (indicated by the switch LED) is off.
Vehicle Speed: 28 km/h or slower
Curvature radius: 70m or less
Relative car speed: All except -10 ~ 250?/h
("-" means overtaking the preceding vehicle)
8.
System control prohibition
The radar is covered by debris: System conditions - Blockage message is outputted
   
If the sensor on the rear bumper is contaminated by snow, mud or stickers, its detecting performance may be lowered.
The radar installation is damaged by an outside shock: Send the error code
BSD & LCA system fails: Send the error code
The radar is overheated: System conditions - Over Temperature message is outputted.
9.
Rear Cross Traffic Alert (RCTA)
Item
Control Value
Notes
Operating vehicle Speed
0 - - 10 km/h
Operating in reverse gear
Relative Speed
4 - 36 km/h
 + : closing 
Operating Distance
0.5 - 20 m
Vehicles: 20 m
Motorcycles: 15 m
Shopping Carts: 10 m

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.
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.)
   
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.
Warning zone is as shown in the following figure:
Detection Range
10.
Rear cross traffic alert (RCTA)
When your vehicle moves backwards from parking lot, the sensor detects the approaching vehicles and gives information driver.

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

If the vehicle detected by sensors is approaching to your vehicle, the warning is chime and the warning light will blink on the outside rearview mirror.
If the detedted vehicle is got out from sensing range, behind your vehicle, moving opposite direction from your vehicle or moving slow, the warning is cancelled.
The system operating is not working properly by circumstance always pay attention to surrounding.
11.
Non-operating condition
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.
12.
Examples of Miss-Maintenance
• 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 Mis-Alignment is occured.
- Bumper : Installation condition, Cracks ont 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.
Components and Components Location

Components 1. BSD unit (RH : Master/ LH : Slave)2. BSD switch3. BSD warning lamp (Built in the outside mirror) ...

Repair procedures

Diagnosis With GDS 1. BSD system defects can be quickly diagnosed with the GDS. GDS operates actuator quickly to monitor, input/output value and self diagnosis. 2. Connect the cable of GDS to the data ...

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