Function Description

The BSW system can help alert the driver of other vehicles in adjacent lanes when changing lanes.
The BSW system uses rear view camera near the rear bumper to detect vehicles in an adjacent lane.
The rear view camera can detect vehicles on either side of vehicle within the detection zone shown as illustrated below.
This detection zone starts from the back of the vehicle and extends approximately 10 ft. (3.0 m) behind the rear bumper, and approximately 10 ft. (13.0 m) sideways.
The BSW system operates above approximately 20 MPH (32 km/h).
If the rear view camera detects vehicles in the detection zone, the blind spot warning indicator illuminates.

Fig 1: Identifying Rear View Camera Vehicle Detection Zone (Buzzer Sounds)
Courtesy of NISSAN NORTH AMERICA, INC.
If the driver then activates the turn signal, a buzzer will sound twice and the blind spot warning indicator will blink.
NOTE: A buzzer sounds if the rear view camera has 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 blind spot warning indicator blinks and no buzzer sounds.

Fig 2: Identifying Rear View Camera Vehicle Detection Range (No Buzzer Sounds)
Courtesy of NISSAN NORTH AMERICA, INC.