2010 Toyota 4Runner Owners Manual - Page 245

2-4. Using other driving systems ● Water droplets are on the camera lens or humidity is high, such as when it rains. ● Foreign matter, such as snow or mud, adheres to the camera lens. ● When the camera has scratches or dirt on it. ● The sun or headlights are shining directly into the camera lens. ● A bright object such as a white wall is reflected in the mirror surface over the monitor.