I have been having issues with my SatNav. It never saves the settings for anything. I had an issue with the alternator, but have since replaced it and have had no other problems besides the nav settings. It doesn't save anything. I change the view and the region and store waypoints and it all goes back to default on next start up. I have had my LR3 for about a year and it has always done this since I have owned it. Any ideas why it does this? Thanks in advance.

Tried the hard reset and it didn't change anything. It is weird because it has saved my home address and one of my marked points, but nothing else ever saves. If I change anything or add marked points it loses all the changes and reverts back to default settings and keeps only my home address and my one marked point from months ago.

Edit:Ok well I have some more information. It is saving my memory points just not where I saved them. I change the category names and they get reset. So it moves them to a different category. I took out the TSD and the Nav system under the seat. I check the plugs and saw no loose wires checked the voltages and they all seem good. The settings for the TSD stay. I also download some newer maps from Europe (Ilive in the USA) just to see if the software update would fix it and it didn't. I didn't want to pay $200 if I can fix this problem. I think it is either the ground or the 12v Batt wire that may be the problem. Any advice about other grounds to check or places to check them?

 

I'm not aware you can download maps, unless you are referring to reprogramming or flashing the ECU for it, which might be worth a try.

The ground on the battery is notorious for corroding from the terminal to the firewall. You should inspect it, and if you note corrosion, replace it.

 

I give up. I think there is a hardware issue. All the voltages are fine and I have checked the grounds with no avail. I don't think I will ever purchase a new one given how expensive they are even used.

 

I think your problem is something to do with the NAV data or where the NAV thinks your 3 is located.

For off, do you know if the DVD in the unit under the drivers seat is a pirate copy or a genuine original?

Assuming the DVD is original, (and the stickers on the copies look genuine by the way), then my guess is your NAV thinks it is not in the same local as your DVD has data for.

Guys in Europe seem to have a similar problem - an Eastern EU DVD in the NAV and they should have a Western EU DVD instead.

You live in USA and I assume you had the problem prior to loading an EU DVD so that is probably not the problem.

Within the link below are a number of files related to the NAV and infotainment system. One of the pdf's within may be of help - certainly lots of wiring diagrams but I do not think you have a hardware problem or software - just a settings problem.

DISCO3.CO.UK Photo Gallery - NAV Radio BlueTooth phone and Rosen DVD

I assume you are aware of the secret diagnostics screen and the 753 code access per the links below?

DISCO3.CO.UK - View topic - special codes

and also

DISCO3.CO.UK - View topic - Alternative Engine Temp Reading

 

Thanks for the suggestions. I have the original disk that came in the truck as well as the newest maps neither one has made any difference. I have seen all of the .pdf files already and have been testing all the voltages. None of the voltages are wrong anywhere and it still wont save the settings. It saves them for about 5 minutes after the car is turned off and about 3 minutes after the power voltage goes away. The constant 12 volt is there all the time, but it still loses the settings. I also have tried the codes that you mentioned and the self test returns no errors. I have tried using 753 at both hidden key pads. I have had no luck figuring anything out. It should work, but it doesn't. I don't get it. There has to be something on the PCB for the dvd drive that is not functioning correctly and not letting the power to the chip that holds the settings get through. The problem that I experience is the same as what you would get if you were to unhook the battery for about five minutes.

 

I would say I am out of ideas.

I would seem you are correct in that the problem must be on the DVD circuit board. I presume that data input goes first to a "volatile" memory chip on the pcb and then is written to the DVD so as to be remembered.

I presume depowering the DVD unit causes any data stored on the chip to be forgotten and since the data could not write to the DVD, then all is lost.

I suppose the next move is to a junkyard NAV unit or to send the NAV somewhere such as below; also there are others.

Contact Us ? German Audio Tech

Range Rover Navigation, Land Rover

 

bbyer - there can be no writing back to the DVD. It's read-only information.
I'm not even 100% certain the memory store is in the DVD unit. Could this information be stored in the nav screen or the head unit? No idea...

 

You are correct - no writing to the DVD as I had figured.


As such, I did further reading and below is from a LR pdf where I guess there is a non-volatile memory chip on the pcb within what I call the DVD unit, and Land Rover calls the Navigation Computer - in other words, the memory is down under the seat and not in the video display unit.

Note also the comment down below regarding if the power goes off early, then memory is lost.

This suggests a early power shutdown problem, but as you said, all appears OK.

On my 3, it normally takes a few minutes for the radio display to disappear after you turn the engine off but do not open the drivers door - that is part of the takes time to go to sleep or shutdown requirement of the design. I am wondering if something is wrong with your sleep timer circuits - that is the infotainment system shuts down immediately rather than staying alive.

It is that system that also keeps the Bluetooth going after the engine is shut down and hence I think that which gives the Nav time to write the personal data into memory. If the delayed sleep timer is not working, then maybe that is the problem.

The navigation computer uses non-volatile memory to store settings and configuration information when it is powered down. This process takes place just before the computer turns off.

CAUTION : If the unit is disconnected before the Entertainment System has powered down, the
computer could fail to complete its data storage. This means that personal settings could be lost.

 

You are correct - no writing to the DVD as I had assumed.

As such, I did further reading and below is from a LR pdf where I guess there is a non-volatile memory chip on the pcb within what I call the DVD unit, and Land Rover calls the Navigation Computer - in other words, the memory is down under the seat and not in the video display unit.

Note also the comment down below regarding if the power goes off early, then memory is lost.

This suggests a early power shutdown problem, but as you said, all appears OK.

On my 3, it normally takes a few minutes for the radio display to disappear after you turn the engine off but do not open the drivers door - that is part of the takes time to go to sleep or shutdown requirement of the design. I am wondering if something is wrong with your sleep timer circuits - that is the infotainment system shuts down immediately rather than staying alive.

It is that system that also keeps the Bluetooth going after the engine is shut down and hence I think that which gives the Nav time to write the personal data into memory. If the delayed sleep timer is not working, then maybe that is the problem.

The navigation computer uses non-volatile memory to store settings and configuration information when it is powered down. This process takes place just before the computer turns off.

CAUTION : If the unit is disconnected before the Entertainment System has powered down, the
computer could fail to complete its data storage. This means that personal settings could be lost.

 

Can you please tell me where you found that information? The navigation does keep ACC power for 2-3 minutes after the key is taking out.