Blind Spot Warning, General

The Blind Spot Warning (BSW) monitors the rear and side areas of the vehicle using short range radar and, if necessary, informs the driver that an intentional lane change (turn signal active) is not recommended at this time. In the broader sense, the BSW system acts as an extension of the rear-view mirrors. It does not release the driver of his/her obligation to perform lane changes safely on his/her own responsibility.

In the respective outside mirror, a visual indicator indicates the status of the BSW and warns of critical situations during a lane change (i.e. a vehicle is in the blind spot). In addition, an acoustic warning can also be given.

The visual warning is issued via the BSW readiness and warning indicator in the respective outside mirror.

The acoustic warning is output via the warning buzzer in the combination meter.

The area which cannot be observed via the outside mirror and inside rear-view mirror is monitored by the following components:

Side radar LH
Side radar RH

All relevant data are evaluated by the side radars, whereby the side radar RH requests the warning output.

NOTE: The side radars operate according to the "master-slave" principle. The master or slave function can be determined via the connector coding. The master function is defined for the right rear bumper radar sensor. In other words, the left rear bumper radar sensor sends its requests to issue warning and operational messages over the CAN communication to the right rear bumper radar sensor. This evaluates the information from both side radars and sends corresponding requests over the CAN communication, the electronic ignition lock control unit and the CAN communication to the corresponding front door control unit and over the CAN communication, the electronic ignition lock control unit and the CAN communication to the combination meter.

Fig 1: Illustration of the Blind Spot Warning principle

Courtesy of NISSAN NORTH AMERICA, INC.

	Overtaking vehicle reaches blind spot of vehicle with BSW		Vehicle recognized in blind spot	Issue of acoustic and visual warnings
	Driver reaction in vehicle with BSW
A.	Lane with vehicle in blind spot during passing maneuver	B.	Lane with vehicle with BSW