NHTSA ID Number: 11032452
Manufacturer Communication Number: M1490
TSB/Document Date: 2026-05-08
Summary
SERVICE BULLETIN M1490 (V 26.6.2): 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 26.6.2. Release Date: Week of April 22, 2026. NOTE: Software version (26.4.3) will need to be manually installed only if current software version of DT II is (26.0.2). After (26.4.3) is manually installed, automatic updates will bring DT II to the latest software version. Refer to bulletin M1713 for instructions. New Features: 2026 Police • Vehicle Setup: Civilianize; LiveWire • S2: Del Mar (S2DM), Mulholland (S2MH), Alpinista (S2AP) - Calibration bundle 10.2.20: Vehicle Supervisory Controller (VSC) and Onboard Charger (OBC) reflash updates. Changes: 2026 Trike • Update “Reverse Lockout Reason” resize column.
SERVICE BULLETIN
M1490
2026-04-23
M1490 (V 26.6.2): DIGITAL TECHNICIAN II - UPDATES AND RELEASE NOTES
LiveWire
Purpose for Service Bulletin
This bulletin informs dealers that Harley-Davidson has made
a software update to Digital Technician II (DT II).
• S2: Del Mar (S2DM), Mulholland (S2MH), Alpinista (S2AP)
- Calibration bundle 10.2.20: Vehicle Supervisory Controller
(VSC) and Onboard Charger (OBC) reflash updates
DIGITAL TECHNICIAN II (PART NUMBER: HD-48650)
Changes
Markets Affected
2026 Trike
All markets are affected.
• Update “Reverse Lockout Reason” resize column
Version 26.5.2
New Software Update
NOTE
The TECHLINK 3 (PART NUMBER: HD-48650-TL3) supports
Controller Area Network (CAN) and J-1850 protocol vehicles.
Release Date:
• Week of March 30, 2026
New Features
• 6-pin CAN vehicles are recommended to use Techlink 3
(TL-3)
2024: Pan America (RA1250), Pan America Special (RA1250S),
CVO Pan America (RA1250SE)
• All 2021 (and later) vehicles must use TL-3 (connects to Red
DLC on the vehicle)
• Updated Body Control Module (BCM) reflash calibration
• 4-pin (J-1850) vehicles are recommended to use TL-3. This
includes all Fuel Injected Harley-Davidson vehicles 2002
and later.
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).
2024-2026: CVO Road Glide ST (FLTRXSTSE)
• Updated Electronic Control Module (ECM) reflash calibration
2026: CVO Street Glide ST (FLHXSTSE)
• Updated ECM reflash calibration
Changes
For dealerships with firewall implementation, the URLs below
need to be white listed:
2026 Trike
• htpps://hdpublicfacadesvc.bosch-automotive.com
• “Vehicle setup: Gear Indicator Calibration” – improve
operation
• htpps://keycloak.bosch-automotive.com
• Update “Reverse Lockout Reason” to support new values
2025-2026 Softail
Version 26.6.2
• Update reflash for Softail Speedometer (SPDO) – enable
operation of auxiliary lamp telltale
Release Date:
• Week of April 22, 2026
LiveWire S2
NOTE
Software version (26.4.3) will need to be manually installed
only if current software version of DT II is (26.0.2). After (26.4.3)
is manually installed, automatic updates will bring DT II to the
latest software version. Refer to bulletin M1713 for
instructions.
• Provide reflash support for VSC hardware (Part No.
41001756RE)
Version 26.4.3
Release Date:
• Week of February 25, 2026
New Features
New Features
2026 Police
Support for 2026 LiveWire Vehicles
• Vehicle Setup: Civilianize
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
• Vehicle Identification Numbers (VINs)
• Guided diagnostic support
• Module part number identification
2023-2025 Touring
• Module reflash / calibration
• Updated BCM software
• Module replace support
Changes
• Vehicle setup
• Guided diagnostic support
LiveWire S2
• Vehicle Status: Display notification when vehicle has
unconfigured Electro Hydraulic Control Unit (EHCU) module
• Vehicle Setup: New operation to support Anti-lock Braking
System (ABS) / EHCU Correction
• Reflash: Enabled EHCU calibrations for vehicles previously
ineligible for update, requiring ABS / EHCU Correction to be
performed
Revolution® Max / 2025 and later Softail Continental ABS /
EHCU Service Vehicle setup
• Add 30 second delay to manual bleed step, to accommodate
module specifications
2026 Touring: Guided Diagnostics – Update U0273 to inform
unprogrammed module may set this Diagnostic Trouble Code
(DTC)
Version 26.1.5
Release Date:
• Week of December 15, 2025
2021–2025 Pan America (RA1250), Pan America S (RA1250S),
Pan America ST (RA1250ST), CVO Pan America (RA1250SE)
New Features
• Reflash – Updated ECM software calibration to improve
quick shifter performance.
2026 Revolution® Max Vehicles (RH975, RH975S, RH1250S,
RA1250S, RA1250ST)
Changes
• VINs
Infotainment Control Unit (IFCU) Customization – Correct issue
where speakers were improperly configured
• Calibration support (including Michelin Anakee Wild tire
selection)
Version 26.3.2
Release Date:
• Week of January 28, 2026
New Features
LiveWire
• S2DM/MH/AP calibration bundle (10.2.15): VSC, OBC,
Rechargeable Energy Storage System (RESS), Telematic
Control Unit (TCU), BCM reflash updates
Changes
• Revolution® Max – Correct issue where ECM (Part No.
41000713) was not being offered reflash
• Improve handling of Clutch Switch Data item for ECM (Part
No. 41000713)
• 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
New Features
Support for 2026 Trike and Touring Vehicles
• VINs
• Module reflash / calibration
• Module replace support
• Module replace support
• Vehicle setup
• Guided diagnostic support
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
• 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 IFCU speaker configurations
2025 Softail
• Updated BCM software
LiveWire: Del Mar (S2DM), Mulholland (S2MH), Alpinista
(S2AP) - EV3
• Vehicle setup
2/3
M1490
• 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 SPDO, ABS, EHCU modules
during reflash
• Ignition ON required for ECM, ALC, Heated Seat Module
(HSM) modules during reflash
• 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).
M1490
3/3
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TSB/Document ID: M1490
Replacement Service Bulletin Number:
MFR Communication Date: 2026-04-24
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL/PROPULSION SYSTEM
MFR Component System:
MFR Component Subsystem:
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