Circuit/System Description
WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
The internal fault detection is handled within the B174W Frontview Camera - Windshield. The symptom byte information is for engineering reference only. No external circuit diagnosis is involved.