Check a VIN

December 18, 2025 Service bulletin

Dtii update procedure for software version (26.1.5)

Harley-Davidson technical service bulletin M1713 for 2016-2019 Harley-Davidson Flhtcu, 2016-2025 Harley-Davidson FLHX and 2016-2024 Harley-Davidson Flhtk and others.

Bulletin number
M1713
Component
Electrical system
Summary
SERVICE BULLETIN M1713: DTII UPDATE PROCEDURE FOR SOFTWARE VERSION (26.1.5). PURPOSE: Initial Release. This bulletin informs dealers that an issue was discovered in the Digital Technician II (DT II) software version (26.0.2), released on November 18, 2025. The issue prevents automatic software updates to be installed on your DT II computer. A manual installation of the latest DT II software version (26.1.5) will need to be performed, to allow future automatic updates.

Owners of these vehicles have filed 120 complaints in the electrical category.

Vehicles covered

VIN decoder

See the problems and recalls for an exact car

Buying a used Harley-Davidson Flhtcu?

Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.

Check its history