Hi, I've had the same problem on my IS220, I've used reverse they were facing down and the one on my side wasn't pulling into normal position, it got stuck in the reverse position and I was also able to move horizontally from the control joystick.
I do not remember exactly what I did, but I'm sure I've pushed the mirror with my hand into normal position(adjusted vertically) and it worked, but don't push it hard. You should also try to find out if there's any reset procedures as for the windows.
Also check if you push the control to adjust if you can hear the little engine making any sound while trying to move the mirror.
Hope this helps, let me know!