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Home >> Buick >> 2017 >> Envision Essence, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Collision/Avoidance >> Object Detection System And Pedestrian Protection System >> Diagnostic Information and Procedures >> Side Blind Zone Alert System Malfunction >> Circuit/System Description
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Circuit/System Description

When the system detects a vehicle in the side blind zone while driving, the left or right side object sensor will supply power to the appropriate outside rearview mirror. Ground is provided through the outside rearview mirror harness. 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. An audible alert will also sound.

Side blind zone alert is active when the vehicle is out of park or the parking brake is off on manual transmission vehicles and at speeds up to approximately 140 km/h (87 MPH). If a vehicle is detected in the blind zone, the warning symbols will turn illuminate on the appropriate side. When the vehicle is started, both outside mirror displays will briefly come on to indicate that the system is operating. The warning symbols will vary brightness based on the ambient light conditions.