Kenwood DNX4230DAB missing SD card

**Butters** · 20th May 2020, 01:30 AM

Provided the 4230DAB's Garmin firmware is:
(i) not 'protected' against using unlocked maps (probably it's unprotected) and;
(ii) your downloaded map *.img is indeed properly unlocked (it will need to have been treated by gimgunlock - if required just google for it, version 0.04);
then the following will work:

Make a folder named Garmin in a CLEAN SD card previously freshly formatted in FAT32 only.
Place the unlocked map img file named only GMAPSUPP.IMG into the Garmin folder.
If you want to add safety camera warnings or other POIs as *gpi files then make a folder POI and add the GPI files (POI folder can either be in the card root or in the Garmin folder for most Garmin devices).
If it supports JunctionView, make a folder named JCV in the Garmin folder and place the appropriate *.jcv file for the map and your device in there. Google to check what additional files the 4230DAB supports).

To check your map is unlocked, open the IMG file in GMAPTool and look under 'Details' tab. If you see an "L" on any line under the heading 'prio' then it's not fully unlocked. You should see only "30" not "30 L S" for a City Navigator map.

Code:

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**ffrlr** · 20th May 2020, 06:09 AM

Thanks Butters for the reply, I have followed those instructions, and seem to have made some progress, I have a map gmapsupp.img, that shows an unlocked map.
I have written them to a blank fat32 SD card, in the Garmin folder.
When I put the card in and hit the 'nav' icon, the head unit switches to nav, displays 'loading maps' and then goes to 'ready to navigate', no map is shown, no are there any on screen icons or text!.
I can hit the left had lower screen, no text or icon is shown, but it pops up a menu where I can enter an address to navigate to.
Entering an address via the postcode works, it finds the street address, but when I view route, there is no map shown.
I am wondering if there is something else missing from the card, as I have no map displayed, and no icons on the nav screen.

Looking in the 4230DAB manual, I should see icons on the nav screen, but I see none at all, but I can see the onscreen keyboard, I can see the trip menu when I tap the distance numbers on the screen, but no icons or menu.

Just in case, I repeated the firmware update to the latest version, but that made no difference, it said update successful and to reboot which I did, but it's still the same.

Ok, further update (maybe).
I have found out how to put the head unit into test mode, it passes all tests, which is good.
But, in navigation, it says 'Base map' 0000 Missing and 'Detail map' 0000 Missing, but the navigation software is showing as version 0350 KNWD 2013 SW Only WinCE and the Junction View is showing as 0200 Junction View.

So it looks like the unit isn't seeing the maps on the SD card, If I take out the SD card, I get 'no map data available' on the screen, re-insering the SD card, I get 'loading maps' then no map data available.

I am unsure if the maps are displayed from the SD card, or copied from the SD card to the internal memory, then displayed from there,

**runeboxer** · 1st August 2021, 06:41 AM

have found out how to put the head unit into test mode, it passes all tests, which is good.

Hi.

I also have a 4230DAB that doesn't load maps (image not found) and i wanted to put it in test mode. How did you do that? Could not find out how. Further more my internal SD card is according to scans healthy but I could not access the exfat partition so i formated it but the ID files in the small partition is still there. Is it possible for you to tell me wich files exists in the small partition and the bigger partition on the internal SD card? My firmware is updated.

Thanks

Thread: Kenwood DNX4230DAB missing SD card

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