Has anyone else had this problem?
Yes, I'm having the exact same problem on a 2002 rx300. Dealer has quoted 2315.00 to replace the rear Nav ECU. Im looking for alternate solutions. ECU may be available via junk yard or new third party. Also,
several folks here also have installed the Pioneer Nav system. Will update when we make a decision. Anybody's comments are welcome. I'm going to guess that the Laser reader device in the DVD Reader
is the culprit. Unit is made for Lexus by Denso. With nothing to lose, I might take it to someone good
for actual repair.
I ended up buying a remanufacturered one off of eBay for $750. 5 minute install and was up and operational. I sent the old one back for a $50 credit.