7x5 unit fix (JCV)

Isn't this already being discussed at http://www.poi-factory.com/node/33977?page=2 . Wonder why we need another thread

Also the file seems to work on other models other than the 7x5 as discussed in the other thread.

As I had quit paying any attention to the other one...

Downloading - and , after I put it on my 765t - I'll still have around a gig free space.

sorry.. i didn't know its in another thread.. i will delete this thread in couple of days..

I never saw other thread so it was nice to see this as I own 2 7XX's

Thanks, worked great....
Had 2 files ending in .SUM, that I deleted also..

Actually, this seems big enough news that maybe it warrants a new Garmin thread with a Subject that will attract everyone who owns a GPS that features JV who doesn't have the big JCV file.

The only issue now is just which Garmin series can use the new humongous JCV file. Garmin states it's only for the nuvi 7x5 and a couple zumo models yet many of us with other models (my 855, for instance) can use the file as well--and it can be installed to the GPS internal drive or to a SD card. Even folks with a large standard issue JCV file with the 2012.20 update state that this new 765-ish MB JCV file offer more JVs.

So maybe once we have a better feel for which models can use the enormous JCV file we should start yet another new thread to alert everyone who could use it.

Consider the poor Garmin GPs owners with lifetime maps who don't visit The Factory often. They may well be stuck with a JCV file less than 10% of this new offering until the next map is issued.

I would appreciate knowing some specifics about the proposed procedure for downloading the 750 MB JVC file to my Nuvi 855:

1. Do I need to install the newest 2012.20 Map Update first? I am reluctant to install the Update, if I don't have to (I no longer trust Garmin to prepare the Update without some glitch). On the other hand, I know that the latest maps and Lane Assistance arrows would be desirable.

2. If I am forced to put the Map Update on my SD card, does the new JVC file go there too?

3. Can I do any Map Update with the previous Garmin Updater (in lieu of installing its new, Automated Lifetime Updater)?

4. I realize that I need to backup all Garmin files first. But if I have to install the full Map Update, will I need to remove the new (smaller) JCV file, which I understand is about 51 MB? What is the filename of the small JCV?

5. Actually, I wonder: Is my 2 GB SD card big enough to hold all of 50 U.S. states and Canada? Since my last Update was via help from Garmin tech support, I don't really know how much went onto the Nuvi...and what, if any, went onto the SD. [I think nothing went onto the SD, though.] Does everything need to be in the same place, or can it be "broken up" into parcels, utilizing both?

6. Can I install a 4GB SD card into the 855 (I'm anticipating that file sizes will continue to be a worsening problem)?

Are There Any Other Helpful Hints or Warnings that I need before proceeding?

Thanks in Advance for everybody's patience with these questions!

Thank you!

I was able to install the 2012.20 full NA map and the large 750 MB JCV file on the internal memory of my 855. I still have a few hundred MB of space left. I did delete the unused language, voice and text files before I started, and I don't store MP3 music, audiobooks or pictures on the internal memory of my 855. So for now, putting the JCV file on the micro SD is not necessary.

All standard warnings apply--like I won't guarantee that this will work for you, etc...

1. Yes, the new 750-ish MB JCV file will only work with the 2012.20 map, the City Navigator North America NT map update that just came out. It will not work with previous map versions so you must update to 2012.20 before attempting the large jcv file swap.

2. First, I suggest you backup your entire nuvi to a hard drive. Then I suggest deleting from the nuvi all the foreign language voice and help files that you'll never use (and if you ever need them, they can be restored from your backup). On an 855, after deleting all help and voice files that aren't in English, you'll have nearly 1GB of free space. This is way more than enough for the full 2012.20 map and its tiny JCV file.

3. Yes, in fact I used the old update method. USB your 855 to your computer, log into myGarmin, then navigate to the myDashboard, and you'll be told there's a map update. Option 1 (Garmin's recommended) is the new auto-updater. Option 2 (what I use and what it sounds like you prefer) is the old map update method. (Once started, look in a lower left corner of one of the early windows for an "Install Options" button. Click this if you want to install the new map both to your GPS and to your computer--the default installation is to your GPS only and not to your computer.) You will be able to install all of North America to your 855.

4. Once your GPS (and computer) have the new 2012.20 map, do another full backup of the nuvi to your computer. Don't overwrite the one you made in step 2 but store this in a new directory. You now have a nuvi 855 with the new 2012.20 map and tiny 51MB JCV file. If you want the larger JCV file (step 5), navigate into your nuvi and look in the nuvi's \garmin\jcv directory. There will be one or two files. Delete both. One is a tiny D3.......A.sum error-checking file and the other is the JCV file, something like D3.........A.jcv. They are the only two files in that directory. Remember that you've backed up your computer before so if you decide to resore the old 51MB JCV file, you can just copy it back from your 2nd computer backup to the nuvi.

5. Go to this thread:

http://www.poi-factory.com/node/33977?page=2

and look for the message from rame1012 dated 11:02AM today. It will provide the instructions for downloading the massive new JCV file made available just today as well as how to install it. This download may well take 30 minutes even with good broadband internet access.

It is possible (if you've deleted the non-English voice files, etc.) to store the full 2012.20 North America map and the large JCV file internally in your nuvi but I suggest you not do this since it may hinder future map updates. With the new 2012.20 map in the nuvi and voice files removed, you'll have over 900MB of free space. Let's keep it free.

So now in your computer, format your micro SD card to ensure it's empty and ready--2GB is probably OK, 4 or 8 will surely work. Create a garmin directory on the SD card. In the garmin directory, create a jcv directory. Now copy the large jcv file you downloaded (D3060030A.jcv; a 752-ish MB fie) to the SD card's \garmin\jcv directory. This may take many minutes to transfer. Safely disconnect the SD card from the computer, turn off, then remove the battery from your nuvi 855*, then install the SD card containing the new large JCV file. Remember that you've already deleted the smaller jcv file from your nuvi itself. Replace the battery and let the nuvi start up.

*For folks following this procedure for non-8x5 nuvis, the battery removal is probably useful only for the nuvis that never really turn off--the 855 goes to sleep mode when turned "off" so a battery removal is the only true way to fully turn it off.

You should see that your nuvi now shows that its using the 2012.20 map. To test the jcv file, plan a route that involves an interstate highway exit ramp or interchange. I can't guarantee all routes will show a Junction View, but it's likely. This can then either be done as a simulation or in a real-time drive. If you see a spectacularly clear Junction View for about 0.1 mile shortly before the ramp, you've succeeded.

When the next map update comes out in three months, let's not be the first guinea pigs to see what size jcv file is offered for our 855s. Let's see what others find before we go for the update ourselves.

If you have further questions or need clarification, ask now before starting the procedure. Good luck!

thanks for gpsomnia for sharing file,

I missed the other thread. D/L'd the fix and it works great. Got everything I lost back again! I still has confidence in Garmin and jumped at d/ling the new map update. That won't happen again.

Lost my confidence in Garmin after receiving their reply to my email about this problem. Gave some cock and bull story about getting a better program by loosing all my junction views?

I personally want to thnak you for reposting this thread, I now feel complete. I also want to thank the original person who posted this fix also!

Do you load the map and the JCV files onto the sd card or just the JCV files.

I loaded the map on the internal memory and the JCV file on the microSD card

Thanks to everyone who responded...and in particular CraigW, and rame1102, and alandb.

I have just viewed two detailed posts by Craig and rame, and am stunned, both that a Garmin exec responded with true help, and the absolutely super quick response to my detailed plea for dealing with the Map Update and JCV file.

This is the first instance I have ever heard of a Garmin rep responding to a customer complaint...and it truly is a case of the "squeaky wheel FINALLY getting some grease."

[BUT what about all the other times, over other major Nuvi issues that I have read about during the last two years (remember the satellite glitch affecting the 7xx and 8xx series, in 2009)? Where will Garmin's executive staff and Customer Awareness be, when we complain in the NEXT two years?]

I will be busy with visiting family today, and will read everything over closely later this evening. I hope to do the install then.

By the way, it turns out my micro sdhc card is 8GB. I suspect that I may have to put at least some of the Map Update onto that card, since my last Update was assisted by Garmin tech support (which deleted everything it could from the 855)...but now the total file size is supposedly larger.

Thanks also to alandb and your experience with the 855 (entire Map Update onto the Nuvi): I have appreciated reading your MANY posts about your 855, over the past 2 years...and respect your experiences. We'll see if my 855 can do as well as yours. Perhaps I'll have to remove a POI file for McDonalds and U.S. highway restrooms (or move them to the SDHC).

I will be reporting back after I follow these voluminous directions, which had to take a lot of time to compose and type: CraigW, you are my kinda guy!

Thanks again.

nuvifan, I can't confirm that you simply must delete extra files to be able to fully load all of the new 2012.20 North America directly on the nuvi itself, but I strongly believe it to be the case. And if you do delete all the voice except American English, Jack/Jill, Karen/Lee, and Emily/Daniel, plus deleting all the non-English Help files, even after the official 2012.20 map update, you'll have nearly 1GB of free space on the drive. Unless something really odd is going on with your 855, I fully expect you'll be able to install all of North America onto the nuvi internally--you don't have lots of photos, audio books, mp3 music or stuff, do you? (I note that I have the full Rest Areas Combined and the humongo schools POI files on my 855 internally plus many others, complete with icons and audio alerts, so I truly doubt that your POI file is creating space issues.) Then the JCV file swap with the new humongo file loaded to the SD and the internal JCV deleted, you'll have lots of room for the future--both on the internal drive and the SD card.

All we ask is that you report back with your results.

I'm still so confused, but pleased, that rame1012 got such a great response from Garmin.

In Garmin's defense, I can sorta understand how a VP would state "this file will only work with models xxx, xxx, and xxx." Ideally, Engineering could have told the VP to write which models can use the new 752MB file and which should not. But still, better than what was said, I'd have preferred "This file was tested and shown to work on models xxx, xxx and xxx but may not work with other nuvi models."

I am concerned that in the next update engineering may only address the 7x5 and other units specifically addressed with the most recent 752MN JCV release.

With the next update, I want to see a full JCV file made available that will include the tag: "This file was tested and shown to work on all nuvi models."

I am extremely pleased to report that I precisely followed CraigW's extensive instructions, and successfully installed the 2012.20 Map Update...and then installed the 751 MB file for Junction Views onto my 855. [And Yes, I did backup all my Nuvi folders before and after, as well the newly copied JCV file.]

Perhaps best of all, I had no warning messages from the Map Install (as happened with 2010.10, when I was offered various smaller mapsets)...AND finally got the proper Map Update, but only with Garmin tech support "taking over my computer" (and doing a perfect job of it). I had problems with the last several versions of the Map Update.

I have also taken CraigW's follow-up advice, and put the new JCV folder onto my 8GB micro SDHC card, thus leaving me about 500,000 bytes of free space on the Nuvi for future updates. It all works perfectly!

I took my 855 for a long simulated drive across Washington State, and saw probably more than a dozen Junction Views (Redmond, WA to Pasco, and then Spokane WA). I can't be sure, but it seemed to me there were more JVs than previously. [There were almost NO JVs anywhere in WA state, when the 855 was new in Summer 2009.

It still really angers me to know that without this forum, I might have blindly downloaded the newest Map Update...and lost forever all the Junction Views to which I had become accostomed...and never known why!] I sincerely hope that the detailed help I have received here can be replicated in some way, within the GPSpassion and GPSreview websites, for the benefit of all potential owners of Nuvi 7xx, 660, and 8xx owners.

QUESTION: Do you think we (rame1102 ?) will have to petition Garmin to make the NEXT JCV file also available as a special deal, as achieved by rame this time? Curiously, the Garmin exec specified that file would work only in 705 series and 660/665 series Nuvis...and thus excluded the 855. And, as always, I will continue to wait a couple weeks after new Updates come out...to see what new problems Garmin has introduced...thanks to reading forums such as this.

THanks! The file works great! Added many JC's to my area.

Moving to the SD card, that is. I have one of the newer 765t. It came with 3.60 (or 3.80) OS I think. The JCV must be on the unit. I get no JVs with it on the card. Many with it in the main unit. Even tried master reset. No luck going that way.

Congrats.

Of course, the beauty of having a backup is that you'll never need it but if you didn't have a backup, you'd find some day that a file is needed to be restored to the nuvi. It's some sort of unwritten law.

Just curious--was the jcv file on the card placed in your user-created \garmin\jcv\ directory? And when USBed to your computer with the SD card in place, does the SD card show as a drive--with a garmin directory, a jcv directory in the garmin directory, and the large jcv file in the jcv directory?

It seems odd that some 7x5 nuvis can use jcv on a SD card while others can't.

Luckily, there's just enough room to keep both internal for you on the nuvi, after I presume you removed unneeded voice files, etc.

I had updated my 765T to 2012.20 and I received the 51MB JCV. I removed that JCV and the SUM file and replaced it with the new large one. Unfortunately the images form my commute on Long Island did not appear. I went back to the 51MB file. Hopefully there will either be a 2012.21 fix or 2012.30 will take care of it. I wish I could say I was surprised at the screw up on Garmin's part but based on past performance with QC it seems business as usual. Garmin Fail.

Does your 51MB file offer JVs and the 750MB one doesn't? Or do neither offer JVs on that route?

Some report that a hard reset is needed on 7x5 nuvis for the new jcv file to be seen and used.

If you travel and like JV, getting the bigger file working is worth the effort.

I did all of the above.

There are two versions of the 765T. One will load older updates(before about 3.60), Others(mine) will not. When 3.90 screwed everything up I tried to load back to a earlier version but no luck. I had to wait for 4.00 to clean up the mess.

removed double post

You should have all of the junction views you had plus a lot more, considering this is Garmin's full junction view database (as in, there aren't anymore possible junction views you could have). I don't think you were supposed to delete the .SUM file, only the .JCV file, but I might be wrong. Did you make sure Junction View was working elsewhere besides on your commute to work? I just find it very odd that your junction views are missing from this big file, considering I'm seeing the views literally everywhere in the country I simulated.

It is ok to delete the .SUM files. They are checksum files left over from running diagnostics on the hidden menus.

I am curious: Why is the "special JV" file (for 705 series, 660/665 models, and 855) so much bigger than the one automatically provided in the newest Map Update? Thus, for those Nuvis with enough space, they get a 458 MB JV file, but the "special JV" file now in my 855 has 750 MB.

Does the "special" file actually contain more JVs? Or are the graphic views more detailed? Or What?

_______
Just another extra Thanks to CraigW and rame1102: Without your having written Garmin personally and getting the new "special" file...and providing the detailed "handholding" instructions to install everything, I would probably have stayed with the previous Update (2010.10) forever, believing that I would be better off with my old 358 MB JVC file. I am so lucky to have your help and support!

It's possible (probable?) the biggest "standard" JCV file, the nuvi 3xxx's 458MB one, may contain the same number of JVs as what we should start calling the "rame1012 file" but the 3700's file is smaller because it needs fewer graphic pixels since it works in split-screen mode whereas the 750-ishMB file is full screen. Whether or not the 450MB or 750MB files are identical in number of junctions available, these do contain oodles more junctions than the tiny 50MB or 150MB files some nuvis were issued as standard with the last update.

Also, thanks for letting us know the procedure worked for you. That should inspire others to give it a go. It was also super to hear that you got the full North America map update and didn't have to choose a smaller map subset to go to your GPS with this latest map update.

Strephon_Alkhalikoi reported on other threads that on a route he ran:
the 51MB file had 0 JCVs
the 150MB file had 11
the 446MB file had 15
the 752MB file had 17 JCVs

According to rame1102, he was told "this is Garmin's full junction view database (as in, there aren't anymore possible junction views you could have)."

There are also other factors involved in the file's larger size including, but not limited to, the fact that the 752MB file's JCVs are full screen while the 446MB file's JCVs are split screen.

I'm really not sure what you are saying but my 765T with SW Version 4.0 works just fine with the JCV file on the SD card. I deleted the file from the internal storage and just did a normal on off cycle with the JCV file on the SD card.

My unit was shipped with 3.60 or maybe 3.80. I tried to load back to an older version after the load to 3.90 but it would not load. This applied to all that came shipped from Garmin with 3.60. There is something different about these later units.

3.60 and 3.90 were general release versions available through web updater. But you are right, 3.80 was a Garmin internal version that was only shipped on new units and was never available through web updater. As I recall, it was reported (or maybe speculated) that 3.80 was made to accommodate some internal hardware modifications in some of the later 7x5's. And I do remember that owners of these 3.80 units had problems if they updated to 3.90, then tried to backlevel to 3.60.

Yup that would be the ones

I have installed the 789MB file on my SD card and I deleted the 51MB file from the Nuvi. I put the Nuvi in diagnostic mode and it does see the JCV file on the SD card. It even generated a .SUM file for it. However, all of the JCV's on my commute on Long Island are gone; Long Island Expressway, NY-135 and Southern State Parkway. I have checked other routes off of Long Island and the JCV's are still there. Whatever this "new" database is, it is missing many JCV's here on Long Island that only appeared when 2012.10 came out. I guess Garmin decided to pull them. I screen captured them before the upgrade so I know they did exist but are now gone. I wish I could say I was surprised.

I decided to downgrade back to 2012.10. I always back up my map images and support files before an upgrade so putting in the previous version of the maps and the D3060020A.JCV file which works and is 367MB in size is trivial. Perhaps Garmin will get its act together and either fix 2012.20 OR fix it in 2012.30. For now, 2012.20 is a pass.

Back at the beginning of this whole disappeared JVs issue, I had considered the same and had a computer backup to use as well.

Since you've done it, are there any tips to remember? I wonder if you: 1) simply replace a few specific files, 2) copy all files from your computer backup and overwrite the newer files on the nuvi, 3) delete everything on the nuvi then copy the computer backup to the empty nuvi, 4) format the nuvi and copy the backup files, 5) something else.

I really came close to putting 2012.10 back on my nuvi when I saw the JV losses in 2012.20.

I deleted the contents of the JCV directory and put the old D3060020A.JCV back in. Then I copied the GMAP3D, GMAPPROM.IMG and GMAPPROM.UNL files from my backup back to the Nuvi. Then I reloaded my custom routes and tested the JCV. The images came back for my commute. I am now regenerating the .SUM files by running the diagnostics and having it test everything to make sure it is fine. This downgrade proves to me there is missing JCV data even in the new large file.

For those of you who have placed the large JCV file (D3060030A) onto the SD card....

Did you comletely remove/delete the JCV folder from the internal unit memory?

Or did you just delete the JCV file and leave the folder intact so you have a JCV folder in the main unit memory AND on the SD card as well ?

Or is the only place you have the JCV folder and file SD card ?

Thanks

Originally I backed up, then deleted the JCV folder from internal memory. Then I read someone's post about renaming it. I felt this was a better option so I wouldn't forget in the future how it was setup. So I put the JCV folder back in internal memory and I renamed it to jcv-disabled. I also renamed the files inside the folder to D1279060A.sum.disabled and D3178010A.JCV.disabled

I first put the big file in the nuvi's internal but that didn't leave a lot of room, so I moved the jcv file to a SD card. I read mixed results from whether the nuvi's main jcv directory had to be removed so I first tried leaving the entire directory there, having removed the two files, the previous jcv and the sum file. For my nuvi 855 with an empty but still present \garmin\jcv directory, all works and JVs come from the SD card.

The main reason I left the nuvi's jcv directory intact was that if I ever needed to use it again, I knew it'd be in the right place and spelled corrected (e.g., JCV or jcv or Jcv, etc.)

So far, so good with my large jcv file on the SD with an intact but empty directory on the nuvi itself.

I did do a battery-removal reboot before using it. Some other users have found that a nuvi hard reset helps.

I do wonder about choice of SD card. For folks who run android on the B&N nook color from a SD card, it's been found that many brands of cards don't work and are either slow or have sporadic crashes. In general, the alternate OS crowd in the nook color camp strongly prefer Sandisk Class 4 cards. I do wonder if some problems that folks are having with the jcv file on SD is due to a card that doesn't work as well as it should. My nuvi is using a Sandisk Class 4 8GB micro SD card. Just a guess on my part, though.

I deleted the file from the internal storage and just did a normal on off cycle with the JCV file on the SD card.

Thanks to all for the responses.

I ended up deleting the entire JCV folder and file from the main unit and placing creating a Garmin Folder with a JCV Folder with the large JCV File inside of it on a 2GB Micro-SD card and all is working well.

I tried to move the JCV file to the SD card on my backup 765T and it work like advertised. It is a pre-3.80 unit. Anyone with a late model 765T that came with 3.80 been able to move to the card?

Oops wrong thread

It should be... L:\garmin\JCV\D3060030A.JCV

Yes, I have a 765T with a V11 motherboard and 4.00 firmware. The JCV loads fine from the SD card when installed in the Garmin\JCV directory. The diagnostics see it and will create a .sum file in that directory.

On my drive this morning, my downgrade to 2012.10 worked fine. My JCV images appeared as usual. Only Garmin will be able to answer as to if these 2012.10 JCV images will ever come back in the future.

I decided to do some Google searching and found a Garmin forum on the JCV issues. Looks like the loss of my local junction views is normal:

I am guessing the highways on Long Island no longer meet the criteria for being included in the new 789MB JCV file. :/

I'm wondering why creating another thread is such an issue for some. These sites can get pretty big and sometimes it is hard finding what you need.

It is better to search for an existing thread and post in it than to make a new one. Usually the topic will have been covered at least once, and searching for previous posts will often give you the answer. It reduces clutter in the forums, and reduces server load. It also shows to the rest of the community that you're not a lazy ass slacker who wants everything handed to them.

This thread wouldn't exist if the OP had actually searched the forum beforehand. But he acknowledges this. Had he mentioned to the rest of the community that he had searched but couldn't find the information, that would have been fine. The search engine on POI-Factory isn't exactly the easiest to use, and I generally recommend using Google to search, appending "site: poi-factory.com" to the end of the search.