My 2004 Rx330 recently has this problem. When I turned a sharp corner to the right, the left front and rear door open signal lighted up on the dash for 2-3 seconds, and at the same time, the bell was chiming as well as the front reading light came on.
Today, when a sharp corner was turned, only the front reading light was on for 2 - 3 seconds.
What could be the problem and can it be fixed DIY