Diagnostics

 

Need help troubleshooting your GPSMAP 66?
You may find the answers you need here before you contact Garmin.

• Have you checked the FAQ?
• Are you having trouble with a Common Issue?
• Have you checked in the GPSMAP 66 discussion forum?
• Does the GPSrChive > How To... page have what you are looking for?
• Have you read the Garmin user manual (PDF/WEB)?

Troubleshooting

• The GPSMAP 66 does not respond. How do I reset the device?
  • Remove batteries.
  • Reinstall batteries.
  • Allow the GPSMAP 66 to cool if hot to the touch.

• How do I reset all settings back to factory defaults?
  • Setup > Reset > Reset All Settings.

• How do I Master Reset my GPSMAP 66?
  • Power the GPSMAP 66 off.
  • Press and hold the (Page) and (Enter) buttons simultaneously.
  • Press and release the (Power) button.
  • The GPSMAP 66 will begin the boot process.
  • Release the (Page) and (Enter) buttons after the backlight illuminates.
  • When prompted "Erase all user data?", select [Erase] and press (Enter).

• My GPSMAP 66 is not acquiring satellite signals.
  • Power your GPSMAP 66 On.
  • Configure Setup > System > Satellite > Satellite System = GPS.
  • Place the GPSr outside, in clear view of the sky, away from any obstructions, for several minutes.
  • If no improvement >30 minutes, from the Satellite page, select Menu > Use With GPS Off > Use With GPS On > AutoLocate Position.
  • Place the GPSr outside, in clear view of the sky, away from any obstructions, for several minutes.
  • If no improvement >30 minutes, perform Master Reset (above) and repeat.

• My GPSMAP 66 will not charge.
  • Ensure the NiMH battery is properly installed.
  • Reduce backlight brightness.
  • Ensure temperature is between 32ºF and 122ºF (0ºC - 50ºC).

• My GPSMAP 66 battery gauge is not accurate.
  • Leave the device powered on until the battery is completely discharged.
  • Charge the battery fully without interruption.
  • Ensure Setup > System > Battery Type is set correctly.

• The batteries do not last very long.
  • See Maximizing Battery Life.

• How can I be sure my GPSMAP 66 is in USB Mass Storage Mode?
  • See Mass Storage Mode.

• My GPSMAP 66 is connected to a computer, but will not enter Mass Storage Mode.
  • See Forced Mass Storage Mode.

• I do not see any new removable drives in my list of drives.
  • Windows may be having trouble assigning a drive letter.
  • Select My Computer > Manage > Disk Management to assign drive letters.

• Why does my computer not recognize my GPSMAP 66?
  • Make sure you have the latest Garmin drivers installed.
  • Enter Forced Mass Storage Mode.
  • When prompted by the Found New Hardware Wizard, select "No not at this time" followed by "Install USB drivers automatically".
  • Once the driver installation is complete, select "Finish".
  • The computer should now recognize the GPSMAP 66 and installed microSD card as external storage drives.

• My GPSMAP 66 is not reading data from the microSD card.
  • Confirm the microSD card meets supported specifications.
  • Verify the microSD card is installed securely and correctly.
  • Ensure microSD card is formatted FAT32 (not exFAT).
  • Try using a different microSD card.

• My PC frequently displays "USB Device not recognized" when I connect my GPSr.
  • Try this solution.
  
  

• While trying to load GCLive data, my GPSMAP 66 perpetually displays a spinning wheel on the screen and no data is loaded.
  • Verify your GPSMAP 66 has a functional internet connection via either Bluetooth or Wi-Fi.
  • Check Setup > Geocaching > Geocaching Live to verify the unit is registered with a valid groundspeak account.
  • Select Setup > Geocaching > Geocaching Live > Unregister to unregister the device.
  • Select Setup > Geocaching > Register Device and complete registration with desired groundspeak account.

• I'm having trouble pairing my GPSr with my smart phone via Garmin Connect or Explore.
  • Try this solution.

• My GPSMAP 66 keeps shutting down before finishing the boot sequence.
  • Try this solution.

 

 

Hidden Test Pages

• Hardware/Software ID and Display Test:
  • Press and release the (Power) button.
  • Immediately Press and hold the (Enter) button.
  • The GPSMAP 66 will boot into a diagnostic menu.
  • Release the (Enter) button.
  • Select [Old Test Mode] (device may not respond immediately).
  • A diagnostic screen will appear displaying hardware and software information.
  • Press (Up)/(Down) to change backlight brightness.
  • Pressing the (Menu) button will cycle through a series of diagnostic screens.
  • Press the (Quit) button to return to the main test menu.
  • Press and hold the (Power) button to power down the device and reset diagnostic mode test results.

• Error Logs:
  • Open the Trip Computer page.
  • Press (Right) until final Trip Computer data page is displayed.
  • Press (Up) > (Right) > (Down) > (Left).
  • A diagnostic screen will appear displaying a list of recently logged exceptions.
  • The lower section of the page will display current memory usage and stats.
  • Select an exception from the list to view register dumps for that exception.
  • Repeat (Up) > (Right) > (Down) > (Left) to enter the Logging Control screen.
  • Press the (Quit) button to exit each diagnostic mode.

GARMIN Support

• Garmin USA Support
• Garmin GPSMAP 66s Support
• Garmin GPSMAP 66st Support
• Garmin Repair Center

Contact GARMIN

Email:

• Garmin support: outdoor.helpdesk@garmin.com
• GPSMAP 66 Firmware Issues: product.support@garmin.com
• Computer Software Issues: application.support@garmin.com

Phone:

• US: (913) 397-8200
• US Toll Free: (800) 800-1020
• Canada: (866) 429-9296