Hello everyone, first I'd like to say thank you to everyone who has posted here, between some of the questions and the answers I have viewed, I was able to figure many things out, as this is my first Lexus. I had the same problem with the voice recognition not working. I was poking around the trunk, and discovered next to the DVD unit for the NAV system is a box. I can only assume it's the now defunct Lexus Link. There was a white connector that was unpluged, so I plugged it back in and now the voice actiavtion system works. I do not get any wierd messages from the Lexus link system so that may be a place to start.
I hope this might help someone else out.
Mike