Just replaced a navigation ECU on my 2002 LS430. Bought it on eBay (86841-33060). It came with a Memorex disk inside labeled "Lexus Nav 7.01". I removed it and replaced it with a 10.1 OEM disk that I bought from Lexus. After installing the ECU and OEM disk, the nav screen displays a white background with a curser centered in the screen. The pointer on the cursar turns as the direction of my vehicle changes. However, no map is displayed. Does anyone know what this behavior means? Can anyone suggest a fix?

 

probably doesn't recognise the disc

did you replace the ECU because the old one failed? or did you install one from a later year into yours?

 

The original one failed. I believe it is gen 2/3 as was the original.

 

does the 7.01 disc works fine on the new ECU? have you connected the GPS wire to the navs ECU? if you have, this problem is definatly disc related

 

When I put the 7.01 disk in, I got error messages on the screen (e.g.,'cannot read disk).

 

have you tried your original disc from your old ECU? or is it stuck in the drive?

that 7.01 disc in the new ECU is a failed copy, on a memorex disc it's a give a way and nav discs should only really be burnt on verbatim media or of that quality at a low burn speed of 1 - 2x

shame I don't live in the states otherwise I could of sent you one I made the other week to try, it doesn't work on my 2001 as mines a Gen00 ( old! ) lol but the newer 2002 + were gen01,02,03 etc

 

The 10.1 I am using is from my old unit.

 

the new ECU faulty? or disc read issues?

seems strange it won't play the disc that was in the unit and your disc, again if anything you would think it would the disc 7.01 fine.


visit this link : http://postimage.org/image/mobvk53up/

http://postimage.org/image/80sg87257/

shows what the no map screen options are.

the second link is to show how to test for a open circuit, you shouldn't have to do this.

 

I just took a trip of several miles. Halfway through it, the map suddenly sppeared. All seems well. Not sure how to expalin why it took so long to appear. I will check the connections tomorrow to be sure they are all secure. Thanks for your help!

 

You got unit with faulty DVD reader Ebay is ridden with these...
Only thing that can help is to reburn working disc using premium media and burner. Although it's not as easy as just making copy, as Nav discs are copy protected....

 

Thanks, Lynzoid. I feared the new ebay ECU was faulty and thought that the 7.01 copied disk was unreadable. But, good news, with the OEM 10.1 disk inserted, the nav system finally started working and has done so all day today.

 

Hey guys, I've actually been doing some googling around about this myself and ran across your thread.

Bob, would you mind telling me who you bought the replacement unit from and/or how much you paid? My Nav has been failing to read a disc on and off for about a year and has finally taken to consistently not showing any navigation whatsoever. The disc has been upgraded with an OEM disc, but it's been about 6 years. It's a 2002 LS 430, so obviously the unit itself is about 10 years old.

I foolishly just dropped about 2k letting the dealer replace my Y-Pipe (Maryland was on the brink of suspending my registration because their emissions program is stupid). I should have gone aftermarket exhaust shop, but I was in a rush. Anyways, now that I am confident that I won't be buying a new car for quite some time, I'm of the mind that perhaps I should replace and/or upgrade my unit.

Is it possible to get a later model unit and plug it into the 2002 unit? I know for example that my Dad's 2010 LS 460 has an upgraded nav with different pictures/colors etc. I feel like I should get some sort of upgrade if I'm going to drop a bunch of cash on this to get it working again properly. The local lexus deal offered to rob me blind and fix it for about 2500 dollars. I said pass and decided to do some independent research. Let me know if you guys have any ideas/information.

Thanks ahead of time!

Ben

 

I dont know if you can replace an older generation ECU with a newer one. I stuck with the orignial (2/3 in my case) just to keep it simple. I tihink I paid around $650 on ebay for the ECU. I'll be glad to send you the name of the seller if you send me a private message about it. Good luck.

 

the connections changed on 2004 onwards on the nav ECU If I recall, you maybe able to get a gen02 or gen03 ecu to work.


In Europe the older gen01 is upgradeable upto 2011 nav software, Im not sure wether the US nav software is still upgradeable after such time, does anyone else know?

 

just looked on my disc it shows that there is 4 connections for the ECU nav on models 2004 onwards, I know obviously the camera ecu connects to the nav on 2004 models.

bobjann how many inputs are on your nav ecu?