Question about Garmin nuvi 205 GPS Receiver

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It is just saying maps are locked - Garmin nuvi 205 GPS Receiver

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The "No Detailed Maps Found That Support Routing" message may appear on your device for the following reasons:

  • The GPS device is missing it's unlock code
  • The maps on the GPS device have been disabled
To determine the cause of the message, touch the screen until the message "No Detailed Maps Found That Support Routing" disappears.
  • If you see a "Can't Unlock Maps" message following this error, remove any microSD / SD cards in the device and follow the instructions below for Retrieving your unlock codes followed by the instructions for Creating an unlock file
  • If you do not get the Can't Unlock Maps message then skip to the instructions for Enabling maps on the GPS device
To retrieve unlock codes you need to have your satnav registered with garmin. If you haven't already registered it connect the satnav to your computer and go to https://my.garmin.com/mygarmin/customers/myGarminHome.faces and click Register your garmin device. Follow the prompts. You'll be asked to create a username and password. Write them down and keep them safe. You'll need them anytime you need to update your maps or solve problems in the future.

Retrieving your unlock codes:
  1. Log into your myGarmin account
  2. Select Manage Maps
  3. Select Details
  4. The unlock code is located under the Installed Maps.
Creating an unlock code file for PC:
  1. Plug your Garmin device into the USB port
  2. Double-Click on My Computer or Computer located on the desktop
  3. Right-Click on the Garmin or nuvi drive
  4. Click Explore
  5. Double-Click on the Garmin folder
  6. Right-Click in a blank space in this window
  7. Move your mouse over the word New
  8. Select Text Document
  9. Press Enter / Return on your keyboard
  10. Double-Click on the New Text Document. This will open the New Text Document in a window called Notepad
  11. Type the unlock code that is listed in the Manage Maps section of your myGarmin account in all upper-case letters with no spaces
  12. Select File
  13. Select Save As
  14. Change the Save As Type to All Files
  15. Type gmapprom.unl in all lower-case letters for the File name
  16. Select Save
  17. Close the Notepad window
  18. Delete the New Text Document file
  19. Disconnect the GPS device from your computer
Creating an unlock code file for Mac:
  1. Open the TextEdit application located in the Applications folder on the Mac HD
  2. Click Format
  3. Select Make Plain Text
  4. Type in the unlock code that you retrieved from your mygarmin account. The unlock code should be in all capital letters and with no dashes.
  5. Click Save As and name the file as gmapprom.unl (Note: Be sure to uncheck the box If no extension is provided, use .txt)
  6. Copy the gmapprom.unl file to the GARMIN folder on your device. (Note: Save the file directly to the Garmin mass-storage device if connected)
If you have a second maps you may also need to unlock it e.g. if the first map is USA and second is EUROPE this may also need to be unlocked
  1. Plug your Garmin device into the USB port
  2. Double-Click on My Computer or Computer located on the desktop
  3. Right-Click on the Garmin or nuvi drive
  4. Click Explore
  5. Double-Click on the Garmin folder
  6. Right-Click in a blank space in this window
  7. Move your mouse over the word New
  8. Select Text Document
  9. Press Enter / Return on your keyboard
  10. Double-Click on the New Text Document. This will open the New Text Document in a window called Notepad
  11. Type the European unlock code that is listed in the Manage Maps section of your myGarmin account. This will need to be typed in all upper-case letters with no spaces
  12. Select File
  13. Select Save As
  14. Change the Save As Type to All Files
  15. Type gmapprom1.unl in all lower-case letters for the File name
  16. Select Save
  17. Close the Notepad window
  18. Delete the New Text Document file
  19. Disconnect the GPS device from your computer
Enabling maps on the GPS device:
  1. Touch the wrench icon on the Where to/View map screen
  2. Touch Settings
  3. Touch Map
  4. Touch Map Info
  5. Select the checkbox next to the maps to be enabled on the device

Posted on Sep 09, 2010

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