I have the same problem with my 2003 LS430. I was told I needed a new door lock motor and that the part is $575 (excluding labor). Have you found out anything on your problem?
yes it will you need to make what they call a hybrid dics if you want this function, i have made one for my gen 2/3 nav
Could you tell me where I could get one of the 7.1 discs that works on a Gen 2/3 and allows use of the override?