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Service bulletin M1490

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10213260
Published by NHTSA2022-06-04
Manufacturer's numberM1490
Manufacturer's date2022-05-23
NHTSA componentEQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

SERVICE BULLETIN M1490: 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). New Software Update: Version 22.4 Release Date: • Week of May 23, 2022. Changes: • Rev Max vehicles – Improve error handling for more robust connection to vehicle • RA1250S – Modify Hand Control Module (HCM) to prevent heated grip mismatch Diagnostic Trouble Code (DTC) from occurring post reflash • Prevent selection of Electro Hydraulic Control Unit (EHCU) on RoadTest, due to module which causes unfriendly behavior.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Equipment and accessories, Software

Vehicles listed
HARLEY-DAVIDSON HARLEY-DAVIDSON

Listing a model year does not mean every vehicle of it is concerned: the document says which.