Blind Spot Information System (BLIS)

The illustration shows the area within which the Blind Spot Information System (BLIS) detects.

A: approximately 9.5 meters.

B: approximately 3 meters.

The cameras take 30 images per second and compare each image with the previous one to check for changes. To determine if any changes are significant, the camera module must also know the vehicle speed. To calculate the vehicle speed and know if the vehicle is turning, the speed signals for each rear wheel are used from the Brake control module (BCM). The driver door module (DDM) (3/126) and passenger door module (PDM) (3/127) receive information from the Brake control module (BCM) (4/16), via CAN, about the speed of both rear wheels. Both these signals are then transmitted to the Left Camera Module (LCM) (6/62) and the Right Camera Module (RCM) (6/63) via LIN communication.

If the camera module discovers that there is something in the dead angle, an orange LED, located on the inside of the panel at the front of the window on the door, comes on. This LED is directly connected to the respective camera module.

In daylight the system reacts to the shapes of surrounding vehicles. The system is designed to detect cars, trucks motorcycles and buses. In darkness the system reacts to the light from the headlamps of other vehicles. If the headlamps of surrounding vehicles are not switched on then the Blind Spot Information System (BLIS) will not detect the vehicle.

The system detects sharp contours. Light reflections and shadows can generate warnings because the system cannot distinguish them from real objects.

Weather conditions that may generate false warnings are: 

• Reflections from a wet road surface.
• Low sun shining into the camera.
• The vehicle's own shadow on large bright surfaces.

Blind Spot Information System (BLIS) is activated when the ignition is on. The system cannot be deactivated but the function to light the light-emitting diodes and to show text messages can be disconnected with the switch on the comfort panel. The function can be reconnected with the switch.

When the switch is activated, a signal is sent from Climate control module (CCM) (4/6) to Driver door module (DDM) and Passenger door module (PDM) via the CAN-net.

A diagnostic trouble code (DTC) is stored if a fault is detected by the Driver door module (DDM) and Passenger door module (PDM) and a signal is transmitted via CAN to the Driver information module (DIM) (5/1), which lights the general warning lamp and displays a text message.