Yes, there is. The override function can be engaged no matter if your car is still or in motion.

1. Hit the "MENU" button (from the left column of options next to your navi screen).

2. Choose "VOLUME" on the screen (should be the middle option on the top row)

3. Press the following areas on your navi screen in this order within a few seconds of each other:

a. upper left part of the screen (on the speaker icon, to the left of where it shows "VOLUME")

b. lower left part of the screen (it's blank, but there's a hidden function there)

c. repeat step 3a

d. repeat step 3b

4. You'll now see a screen called "Service" listing different options (note - this is primarily for use by Toyota service technicians, so I wouldn't select any other option beyond the one I'm about to tell you to use). Select the 3rd option down on the left hand column, "Over Ride". MAKE SURE YOU HOLD THE BUTTON DOWN FOR AT LEAST 2-3 SECONDS. You'll know if it's engaged by when you release the button - it should turn a dark shade of blue. Hit "BACK" - it's on the upper right part of the "Service" screen.

5. Now, select the "return" (curved arrow) function on the VOLUME screen.

All functions that were previously locked while your car was in motion should now be accessible. The only caveat here is that you need to follow all these steps every time you restart your car. I know this sounds like a lot of steps, but it should take you less than 20 seconds once you've gotten the hang of it.

Let me know how it turns out.

Ken