NHTSA ID Number: 11028615
Manufacturer Communication Number: M1490
TSB/Document Date: 2026-02-06
Summary
SERVICE BULLETIN M1490 (V 26.3.2): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES. PURPOSE: Revision. This bulletin informs dealers that Harley-Davidson has made a software update to Digital Technician II (DT II). DIGITAL TECHNICIAN II (PART NUMBER: HD-48650). Version 26.3.2. Release Date: Week of January 28, 2026. NOTE Software version (26.3.2) will need to be manually installed only if current software version of DT II is (26.0.2). Refer to bulletin M1713 for instructions. New Features: LiveWire. Changes: Revolution Max and all MY2026 vehicles. NOTE: Digital Technician II (DT II) supports additional Harley-Davidson motorcycle models and model years outside of those listed.
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TSB/Document ID: M1490
Replacement Service Bulletin Number:
MFR Communication Date: 2026-01-28
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: UNKNOWN OR OTHER
MFR Component System:
MFR Component Subsystem:
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SERVICE BULLETIN
M1490
2026-01-28
M1490 (V 26.3.2): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES
This bulletin informs dealers that Harley-Davidson has made
a software update to Digital Technician II (DT II).
• S2DM/MH/AP calibration bundle (10.2.15): Vehicle
Supervisory Controller (VSC), Onboard Charger (OBC),
Rechargeable Energy Storage System (RESS), Telematic
Control Unit (TCU), Body Control Module (BCM) reflash
updates
DIGITAL TECHNICIAN II (PART NUMBER: HD-48650)
Changes
Markets Affected
All markets are affected.
• Revolution® Max – Correct issue where Electronic Control
Module (ECM) (Part No. 41000713) was not being offered
reflash
New Software Update
• Improve handling of Clutch Switch Data item for ECM (Part
No. 41000713)
Purpose for Service Bulletin
NOTE
The TECHLINK 3 (PART NUMBER: HD-48650-TL3) supports
Controller Area Network (CAN) and J-1850 protocol vehicles.
• 6-pin CAN vehicles are recommended to use Techlink 3
(TL-3)
• All 2021 (and later) vehicles must use TL-3 (connects to Red
DLC on the vehicle)
• 4-pin (J-1850) vehicles are recommended to use TL-3. This
includes all Fuel Injected Harley-Davidson vehicles 2002
and later.
• Added vehicle pictures to Vehicle Identification Number (VIN)
selection page for 2026 models: Pan America Limited
(RA1250L), Street Glide Limited (FLHXL), Road Glide
Limited (FLTRXL), CVO Street Glide (FLHXSE), CVO Road
Glide ST (FLTRXSTSE), CVO Street Glide ST (FLHXSTSE),
Street Glide 3 Limited (FLHLT), Road Glide 3 (FLTRT) and
CVO Street Glide 3 Limited (FLHLTSE)
Version 26.2.1
Release Date:
• Week of January 16, 2026
TECHLINK 3 (PART NUMBER: HD-48650-TL3) will not support
Buell, VDO and Magneti Marelli vehicles (4-pin DLC). Support
for those vehicles is available via TECHLINK II (PART
NUMBER: HD-48650-1).
New Features
For dealerships with firewall implementation, the URLs below
need to be white listed:
• Module Reflash / Calibration
Support for 2026 Trike and Touring Vehicles
• Vehicle Identification Numbers (VINs)
• Module Replace
• htpps://hdpublicfacadesvc.bosch-automotive.com
• Vehicle Setup
• htpps://keycloak.bosch-automotive.com
• Guided Diagnostics
Version 26.3.2
2023-2025 Touring
Release Date:
• Updated BCM software
• Week of January 28, 2026
Changes
NOTE
Software version (26.3.2) will need to be manually installed
only if current software version of DT II is (26.0.2). Refer to
bulletin M1713 for instructions.
Rev Max/ 2025+ Softail Continental Anti-lock Braking System
(ABS) / Electro Hydraulic Control Unit (EHCU) Service Vehicle
setup
• Add 30 second delay to manual bleed step, to accommodate
module specifications
New Features
2026 Touring: Guided Diagnostics – Update U0273 to inform
unprogrammed module may set this Diagnostic Trouble Code
(DTC)
LiveWire
NOTE
In the interest of preserving customer safety and satisfaction, always check for outstanding recalls whenever any motorcycle is brought into your dealership for either maintenance or service.
ROUTING
INITIAL HERE
SERVICE
MANAGER
SALES MANAGER PARTS MANAGER
WARRANTY
PROCESS
MANAGER
LEAD TECHNICIAN TECHNICIAN NO. 1 TECHNICIAN NO. 2 TECHNICIAN NO. 3 RETURN THIS TO
Version 26.1.5
Release Date:
• Week of December 15, 2025
New Features
2026 Revolution® Max Vehicles (RH975, RH975S, RH1250S,
RA1250S, RA1250ST)
• VINs
• Calibration support (including Michelin Anakee Wild tire
selection)
• Module replace support
• Vehicle Setup
• Guided Diagnostics
Changes
• Guided Diagnostics: Fixed missing 2026 Police BCM
Diagnostic Trouble Code (DTC) U027300
• Vehicle Setup - Tire Pressure Monitoring System (TPMS) Tire Selection – Add logic to confirm ECM calibration is at
proper version before allowing Michelin Anakee Wild tire
selection.
Version 26.0.2
Release Date:
• Week of November 18, 2025
New Features
2026 Vehicles
• Calibration support
• Removed Vehicle Status notification to LiveWire for
instrument update
System Information
• Improved load performance
• IFCU - Hide AMP2 fields when module is not present
Required Dealer Action
Techlink
• The TECHLINK 3 (PART NUMBER: HD-48650-TL3) will
support CAN protocol vehicles (6-pin Data Link Connector
(DLC)) at launch. J-1850 protocol (4-pin DLC) support is
planned for early 2020.
• Techlink 3 will not support Harley-Davidson Buell, Vereinigte
DEUTA–OTA (VDO) and Magneti Marelli vehicles (4-pin
DLC). Support for those vehicles is available via TECHLINK
II (PART NUMBER: HD-48650-1).
• 2021 vehicles must use TECHLINK 3 (PART NUMBER:
HD-48650-TL3) (connects to Red DLC on the vehicle).
Digital Technician™ II
• The Digital Technician II software version updates are
automatic and occur while connected to the Internet.
• If an internet connection is lost, the download continues from
where it stopped.
• If the Digital Technician II software is open, the application
prompts the user to exit before the install can continue.
• All Digital Technician II software updates are deployed
automatically via the XMS agent software and require a
minimum model year software version (example: Model Year
2021 = minimum version v21.0).
• Module Replace support
• Guided Diagnostic support
• Variable Valve Timing (VVT) feature support for vehicles
with Engine Character “N”
• Updated DTC support
• Support Auxiliary Load Controller (ALC) on Police vehicles
• Support 2026 Infotainment Control Unit (IFCU) speaker
configurations
2025 Softail
• Updated BCM software
LiveWire S2DM/MH/AP EV3
• Updated calibration bundle 10.1.9/10: VSC, OBC, RESS,
TCU, BCM
• Features: Vehicle capability of reverse and roll-forward regen
Changes
• DT II License Error – updated text
• Advance Audio Radio Reflash – Fixed error on J1850
vehicles
• External power required for Speedometer (SPDO), ABS,
EHCU modules during reflash
• Ignition ON required for ECM, ALC, Heated Seat Module
(HSM) modules during reflash
2/2
M1490
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