B094D Buick Code - Left Side Object Detection Indicator Circuit

The side blind zone alert system sensors are located behind the rear fascia and detect and report objects on either side of the vehicle, within a specified blind zone. The system alerts with a visual indicator placed on each side rear view mirror, to the presence of objects that may not be visible in the inside rearview mirror and outside rearview mirrors. When the system detects a vehicle in the side blind zone while driving forward, independent if passing a vehicle or being passed, the Left or Right Side Object Sensor will send a signal via serial data to the appropriate Door Lock/Window Switch. The Door Lock/Window switch supplies power and ground to the outside rearview mirror. When commanded via serial data, the Door Lock/window switch will provide voltage to the outside rear view mirror. The amber warning symbol will light up in the appropriate outside mirror. This indicates that it may be unsafe to change lanes. If the driver then activates the turn signal, the amber warning symbol starts flashing as an extra warning not to change lanes.
Side blind zone alert is active from speeds of 10 km/h (6.2 MPH) up to 140 km/h (87 MPH). Driving faster deactivates the system, indicated by low lighting warning symbols in the mirrors. Driving under this speed again will turn off the warning symbols. If then a vehicle is detected in blind zone, the warning symbols will illuminate normally on the appropriate side. When the vehicle is started, both outside mirror displays will briefly come on to indicate that the system is operating.

• Faulty Left Side Object Detection Indicator
• Left Side Object Detection Indicator harness is open or shorted
• Left Side Object Detection Indicator circuit poor electrical connection