System Description

BLIND SPOT WARNING (BSW) SYSTEM BLIND SPOT WARNING (BSW) SYSTEM : System Description


SYSTEM DIAGRAM






ADAS CONTROL UNIT INPUT/OUTPUT SIGNAL ITEM
ADAS control unit receives signals via CAN communication. It also detects vehicle conditions that are necessary for BSW control.

Input Signal Item






Output Signal Item






FUNCTION DESCRIPTION
- The BSW system can help alert the driver of other vehicles in adjacent lanes when changing lanes.
- The BSW system uses side radar installed near the rear bumper to detect vehicles in an adjacent lane.
- The side radar can detect vehicles on either side of vehicle within the detection zone shown as illustrated.
- This detection zone starts from the outside mirror of vehicle and extends approximately 10 ft (3.0 m) behind the rear bumper, and approximately 10 ft (3.0 m) sideways.
- The BSW system operates above approximately 32 km/h (20 MPH).
- If the side radar detects vehicles in the detection zone, the BSW/BSI indicator illuminates.





- If the driver then activates the turn signal, a buzzer will sound twice and the BSW/BSI indicator will blink.

NOTE:
A buzzer sounds if the side radar have already detected vehicles when the driver activates the turn signal. If a vehicle comes into the detection zone after the driver activates the turn signal, then only the BSW/BSI indicator blinks and no buzzer sounds.






BSW SYSTEM OPERATION DESCRIPTION
- ADAS control unit enables BSW system.
- The ADAS control unit turns on the BSW system when the warning systems switch is turned ON.
- Side radar detects a vehicle in the adjacent lane, and transmits the vehicle detection signal to ADAS control unit via ITS communication.
- ADAS control unit starts the control as follows, based on a vehicle detection signal, turn signal and dimmer signal transmitted from BCM via CAN communication:
- BSW/BSI indicator signal and BSW/BSI indicator dimmer signal transmission to side radar.
- Buzzer signal transmission to warning buzzer.
- Side radar transmits an indicator operation signal to the BSW/BSI indicator according to BSW/BSI indicator signal and BSW/BSI indicator dimmer signal.

Operation Condition of BSW System
ADAS control unit performs the control when the following conditions are satisfied.
- When the warning systems switch in turned ON or BSI system turned ON.
- When the vehicle drives at 32 km/h (20 MPH) or more to the forward direction.

NOTE:
- After the operating conditions of warning are satisfied, the warning continues until the vehicle speed reaches approximately 29 km/h (18 MPH)
- The BSW system may not function properly, depending on the situation. .

BULB CHECK ACTION AND FAIL-SAFE INDICATION







*1: Blinking cycle when the side radar is in factory-default mode condition





NOTE:
Time shown in the figure is approximate time.
*2: Blinking cycle when the side radar blockage condition or lane camera unit high temperature condition





NOTE:
Time shown in the figure is approximate time.

BSW INITIAL STATE CHANGE

CAUTION:
Never change BSW initial state "ON" ⇒ "OFF" without the consent of the customer.
BSW initial state can be changed.
- BSW initial ON* - BSW function is automatically turned ON, when the ignition switch OFF => ON.
- BSW initial OFF - BSW function is still OFF when the ignition switch OFF ⇒ ON.
*: Factory setting

How to change FCW/LDW/BSW initial state
1. Turn ignition switch ON.
2. Warning systems switch is OFF.
3. Push and hold warning systems switch for more than 4 seconds.
4. Buzzer sounds and blinking of the warning systems ON indicator informs that the FCW/LDW/BSW initial state changes completed.