Recently I had the DVD map for the navigation system upgraded to the 2008 version on my 2002 LS430. This was the first time the navigation system has ever been touched in the 7 years I have owned the car. One week after the upgrade the navigation ECM could no longer read the DVD map. I am now being told I need to replace the ECM (more than $1,000 cost), and that the failure had nothing to do with the DVD map upgrade that took place the week before. I have trouble accepting these are not related. Has anyone seen or heard of this before? Is anyone aware of an instance where upgrading the DVD can cause problems with the ECM?
thanks, Pat
