Updates & Downloads
T 5, TT 15 OnSemi software version 5.40
as of August 16, 2022
Use WebUpdater to install this file.
(993 KB)
View system requirements
Notes:
- WARNING: If this software is uploaded to a device other than that for which it is designed, you will not be able to operate that device.
- If attempts to upload software fail, you may need to return the device to Garmin® for service.
Change History
Changes made from version 4.50 to 5.40:
- Fix Rescue Mode not exiting when rate changes
System requirements
- IBM-compatible PC running Windows 7 SP1 or later operating system and an available USB port.