Thread: Kenwood DNX4230DAB missing SD card

Yes that is correct, unable to download using garminexpress.

I 'may' have made some progress, I found the Kenwood service manual for a similar model head unit, in the schematic, it showed an SD card slot and also an Micro SD slot.
this got me wondering whether the head unit has an internal SD card slot, so in desperation, I removed the head unit from the truck, and took of the lid.
After removing the dvd drive, there beneath it is a Sandisk 8gb SD card.
I've removed the card, and tried to image it using Win32diskimager, it failed saying unable to read the card.
In Windows, I can see the files on the card, it's similar to how I built the external sd card, with similarly named files etc.
I've tried manuall copying each file into a folder on the PC and several of them fail to copy, importantly, two that fail are GMAPBMAP.IMG and GMAPSUPP.IMG, which I guess is why in system menu, it is showing base map and detail map as missing.

I've tried running windows disk checker and it says the drive is ok.
I have nothing to lose, so after lunch, I am going to try and make a new card, using all the files off the one I removed from inside the head unit, but not the files that I cannot copy, i'll replace those with the ones I downloaded earlier and see if that helps, failing that, i'll have to try and find someone else with the same head unit, and try and image their card to rebuild mine with their image.

I don't want to change or modify the card I removed from inside the head unit at this stage just in case there is something on there that is vital, such as a serial number or ID code etc.

Ok, Further update, the card from inside the head unit is partitioned into two partitions, a small fat 10kb partition, and a larger 7.8gb ex-fat partition.
I took a Kingston 8gb SD card, and using windows created two new partitions on it identical to the ones on the Sandisk internal card I removed.
Then copied the Garmin folder and contents from the original card small partition onto the Kingston small partition.
I then repeated the process on the larger partition, leaving off the files I couldn't copy which were a couple of vehicle images, and the GMAPBMAP.IMG and GMAPSUPP.IMG files and another file call Diag with 0 bytes size.
I then used the GB & ROI file I downloaed, renamed it to gmapsupp.img and the basemap I downloaded gmapbmap.img, copied those to the new Kingston sd card in the garmin folder on the big partition.
Ejected the card, put it back insid ethe head unit, reassembled it and switched on ..........
I now get maps and icons :-), routing works and I get voices outut to the speakers, so it looks like it is all working.
I am now going to remove the internal card again and create a full image of the entire card for safekeeping, then I can try and get junction view and speed cameras working.

Butters, thank you so much for sticking with me on this project, you have helped immensley, i'll do a final update when I have got speedcameras and junction view working :-))))

I don't know about this one, but not all devices support all the features.

Use unlocked:
[Only registered and activated users can see links. ]

Oh, it was definately the internal SD card that was corrupt, in fact I thik it is physically damaged.
After getting it all working with a new Kingston 8GB card, i've just tried to open the GMAPBMAP.IMG and GMAPSUPP.IMG files in the Gmaptool as you suggested and it will not open them at all.

So, i've then tried to format the original internal SD card in windows, it fails to format the larger partition contnually reports crc error.
I then tried to format it in Linux, that too fails, I used gparted to remove the partitions and then tried to create a single partition and reformat that, gparted will not write the new partition table to the card.

I did as you said, route from my home to London, and junction view does work, I was expecting it to show junction images at more junctions (minor road junctions) , I guess, but when on a motorway, or dual carriageway, then they are shown.

No joy with speedcameras, I downloaded the file Boki_Srb suggested, copied the UK cameras into the Garmin\POI folder, but they don't show up on the map, nor when I simulate the route do I see them.
I'll have to play some more today and see if I can progress them.

I am wondering if I remove the detail map from the internal SD card, then put the unit back together, if I can copy the city navigator map and he POI's to a second SD card and keep that in the front SD card slot.
It would make changing the maps easier in future.

I am sure the issues I had originally were all down to the internal SD card being damaged / corrupt, since re-creating the internal card, everything has worked perfctly, the icons and symbols have all come back which were missing on the original card.

Yes, before I embarked on this journey, I updated the nav software to 1.12.0
I tried to put some audio files on the external SD card, the media player doesn't seem to access the SD, only files on the USB stick, I think that the SD card on the front is just for maps.

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Hi,

I did post a quick reply earlier this morning, but it doesn't seems to have shown up yet.
I've removed the GMAPSUPP.IMG from the internal SD card, but left the base map on there, also removed the JCV folder.
Now without the external SD card in, all I am seeing is the base map with major roads.
On the external SD card, I have a 'garmin folder', with the GMAPSUPP.IMG for the UK, inside that, a 'voices' folder with a few additional unlocked voices, a 'POI' folder with the UK speedcamera .gpi file Boki_Srb suggested, along with a few other .gpi files for supermarkets and camp grounds etc and a 'vehicle' folder with a few additional cars and finally the JCV folder with the junction view file.

Runing the navigator app on the headunit without the externmal card installed, I am only seeing major roads :-), I then insert the external SD card and it displays loading maps..., then once that is complete, I see the UK detailed maps :-) so it is reading the external front sd card, simulating a route, once on a motorway or dual carriageway, I am seeing the junction view :-)

But, I cannot see any of the poi's, do I have to enable them somewhere within the menu's? I also am unable to select any of the voice files that I copied into the voices folder or any of the vehicles.

In case the earlier reply didn't get through, yes, I did update the firmware in the head unit to 1.12.0 before this journey started, in case that was the reason it didn't work initially.

The original internal SD card is definately damaged, I am unable to reformat it in either Windows or Linux, nor can I repartition it in either OS.


Just following on from the above, I've moved the entire POI and Vehciles folders, from the external SD car onto the internal one along with the contents of the voices folder.
Now, when I restart the unit I am able to go into categories, POI's and select custom, I can see the supermarkets etc that I couldn't with the files on the external SD card.
Same with the vehicles and voices, I am now able to select them, but couldn't when they were on the external card.
Not sure about speed cameras yet I am not able to view them on the map, there are several close to me here, they are showing in the .gpi file when I have conerted it to a .csv I am able to see them, but cannot on the Kenwood map shown on the head unit.

Are they normally visible on the screen of the unit when viewing the map?

It seems most of your problems are sorted one way or another, except your 'speed cam' question. In navigation mode (actual or simulated) you should get a screen and audible warning as you approach them. I think that Cyclops safety cams would work in your device, one way to be sure they are compatible would be to connect the SD with GarminDevice.xml to GarminExpress to see if it offers Cyclops for purchase:

Code:

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If they are offered then the latest available 'unlocked' (actually, they're decrypted) file for UK/ROI from the [Only registered and activated users can see links. ] should work fine. You should be able to check on the device if you have them properly loaded (use Garmin\POI folder).

I say again that there seems to be a problem with the head unit reading the external SD, that opinion's further strengthened by your report above about it not reading files from there. Any files loaded onto the SD by GE or manually should be read in hierarchy over the internal microSD.

PS: Which GPI files did you dissemble or convert to CSV? Cyclops files are not easily broken down like other 3rd party cam. files.

I've just done what you suggested with a blank SD card containing the GarminDevice.xml file on it.
GE shows safety cameras and live traffic, but when I click safety cameras, it says no product available :-(

The .gpi file I converted was one I downloaded from web which was already in .csv format, it had 'some' UK speed cameras, but the ones local to me were in there, I converted it to .gpi with poiloader, it was not an official file unfortunately.

I would tend to agree about the external SD card slot having an issue, but it correctly reads the gmapsupp.img file from the card in the slot, just doen't want to load the voices, vehicles, poi's from it.

It's no big deal though, at least i've got mapping working, which is a huge leap from when I started and had nothing.

Really appreciate all the help and patience, it's time to put the unit back in the car and go for a drive.

Well done you got there in the end
YES there is an internal micro card with the BASE MAP lucky for me got another unit for $30 and copied the internal card to a new one installed it to replace the corrupt card like you tried all my tricks of recovery format NO LUCK now have 2 head unit working perfect with 2020 maps
Yet to do this move the Camera POI and or other up a directory CARD\Garmin\camera.poi did hear KENWOOD you have to put here next time you go maps UPDATE it will then copy to the internal micro card
I purchased off ebay an extension micro cable when it arrives will take out head unit again take off the top remove CD player and plug the cable into the slot reassemble after unit back just have to on left side of console near glove box have access to the card with out removing head unit ever again any poi updates or map errors card removal made easy
Here is link on ebay give you an idea due to COVID been 3 months and still not here
...removed dead link...