Coolest

Have you tried a disk with a newer version on though? What I'm saying is that (possibly) if it wants an upgrade, it has to be dated newer until it is taken out of the upgrade mode.

Got to be worth a try at least?

That's worth a shot. Let me try to get my hands on one of those. Stay tuned.

Ok, I wonder if it in upgrade mode and won't accept the old disk? Its waiting for some sort of disk and there's probably a way of getting out of this mode but this is the only thing I can come up with!

Do you know anyone that you could try a newer disk from? Don't suppose you recall what version yours was?

I think you have to pop the fuse for it to do a complete reload after you've put the disk in. (Or just unplug its power cables). I might be wrong on that though, I can't remember.

If it works, see what disks are on Ebay from someone who has paid for an upgrade. Not sure on the legals though. As long as its not a copy I think you would be ok but best check.

I have tried my original and it won't read it either. You are correct that it's in a mode where it wants a specific disk and the key is to get out of this mode, but the question still is how do you get out of this mode? I am not sure where this state is stored as I have drained the back up Battery in the ECU and KevBonner even removed the Battery for an hour by desoldering and it still keeps the setting.

We need someone from Toyota or Lexus to get us the answer as to what they do in the shop. I'm sure it's something simple but the question still is what???? Any Lexus/Toyota Techs out there please help us. I saw someone selling our ECU on eBay for 500 US dollars, but is that the answer. If the answer is a repair disk then where is it and can I buy it from someone? At this point I have taken the unit out of the car and will keep it out until someone finds an answer. I'll keep my fingers crossed.

Hi guys,

Thanks for all the help :) i've been on the american site and tried a few things that they recommend. I removed the nav dvd unit from the boot and took it apart, then removed the battery in the unit by de-soldering it, I kept the battery out of the unit for an hour, so it should have cleared the momory, then put it all back together, it's still the same :( Some guys were talking about resetting the ECU by disconnecting the battery cable in the ECU, How do i do this? would I not lose my radio settings and need a code for my radio?

Thanks....

Kevin :)

Thanks for doing the de-soldering that was my next try since trying to drain the Battery has not worked. I'm not sure what my next step is going to be. I have a 2002 LS 430.