Quote Originally Posted by acxent View Post
I entered the 53DTQ-RNJYC-GPJHV-A7Y4C-68CP4 unlock key into the sendmap20 interface (removed the dashes) and created a single gmapsupp.img file from the many img files in the RoadNavi v2.10 (locked) folder. I then created the gmapsupp.unl file in notepad. I used the Jetmouse keygen with my device ID and the FID and PID numbers for that. I put both files into a Garmin folder on a microSD card. I put the SD card into the Garmin 1370t, turned the device on, and nothing. In Maps, under Info, I only see the preinstalled Europe, US and Canada maps. Can somebody advise what I need to do for my device to see the Japan maps?
(I will now try the unlocked versions from Easy Share). Should I just unrar them and put them on an SD card into a Garmin folder? Do I also need to put in the gmapsupp.unl file specifically created for my device using the keygen?

Alright, looks like I finally got it. The first link to the unlocked versions (part 1) gave a 440 mb img file which works from the SD card on Garmin 1370t.


If you use a key info tool on 53DTQ-RNJYC-GPJHV-A7Y4C-68CP4 you will find that it's for UnitID = 0.

  • UnitID: 0
  • Date expire: Never
  • Family ID: 5041
  • Product ID: 22
  • Region ID: 0
  • Vendor ID: 0
  • Product name: Japan RoadNavi 25000 v2


It's quite sure that you don't have UnitID = 0. You must generate a unique key with a UnitID for either your CardID/CID or your GPS UnitID. The best is to generate the key based on the memory card CID if you're using that card in more than one GPS unit.
Some problems could also occur with MapIDs greater or equal to 2200. Newer GPS units with latest firmware might require a GMA digital certificate. In that case use the unlocker instead and use an already unlocked gmapsupp.img file.