Tried this on my 07 - RX 350 and it does NOT work :(
Probably because your NavDVD is version 6.1. The override was moved in v6.1; we're still trying to find out where. Have a look at this Club Lexus post.
SonarTech
Do you think that there will ever be a fix for version 6.1. It seems that Lexus was set on keeping us locked out this time for sure. I would pay $500 for a fix on this which is stupid as I paid good money for this car. I guess I need to remember ... good things come to those who wait... :)
Did you ever find any other way around this - even if you have to purchase the fix? I just placed my RX350 for sale after owning it about 45 days because of the navigation/bluetooth issues, and will go back to an Acura if I have to. Just trying one last thing.