Service campaign L1019

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)
Type	Service campaign
NHTSA id	11022985
Published by NHTSA	2025-09-09
Manufacturer's number	L1019
Manufacturer's date	2025-09-09
Campaign id or software version	1901
NHTSA component	UNKNOWN OR OTHER; EXTERIOR LIGHTING; ENGINE

NHTSA's summary

PRODUCT PROGRAM COMMUNICATION L1019 DEALER LETTER: PRODUCT PROGRAM 1901 S2 TCU REPLACEMENT. PURPOSE: DEALER LETTER COMMUNICATING IMPORTANT PRODUCT PROGRAM INFORMATION, Product Program 1901, MY24 LiveWire® S2 TCU Software in support of SERVICE BULLETIN L1019: PRODUCT PROGRAM 1901 S2 TCU REPLACEMENT.

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

Engine, Lighting

Vehicles listed
LIVEWIRE S2 DEL MAR	2024
LIVEWIRE S2 MULHOLLAND	2024

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

Other bulletins for the same vehicles and component
M1490	2026-10-02. Service bulletin. SERVICE BULLETIN M1490 (V 26.9.4): 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. 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. 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). Version 26.9.4, Release Date: Week of September 17, 2026. New Features, Changes. 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.
M1490	2026-05-08. Service bulletin. 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.
M1490	2026-04-08. Service bulletin. SERVICE BULLETIN M1490 (V 26.5.2): 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 26.5.2 Release Date: Week of March 30, 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. 2024: Pan America (RA1250), Pan America Special (RA1250S), CVO Pan America (RA1250SE) • Updated Body Control Module (BCM) reflash calibration. 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. 2026 Trike • Update “Reverse Lockout Reason” to support new values, • “Vehicle setup: Gear Indicator Calibration” – improve operation. 2025-2026 Softail • Update reflash for Softail Speedometer (SPDO) – enable operation of auxiliary lamp telltale. LiveWire S2 • Provide reflash support for Vehicle Supervisory Controller (VSC) hardware (Part No. 41001756RE).
L1023	2026-01-09. Service bulletin. SERVICE BULLETIN L1023: 2024 S2 DEL MAR REPLACEMENT POWER ELECTRONICS UNIT (PEU) COLOR CHANGE. PURPOSE: Initial Release. The 2024 S2 Del Mar replacement Power Electronics Unit (PEU) will be changing color from silver to black. There is a black trim kit (Part No. 47201242 or 47201243) available to switch over silver components on a customer's motorcycle. This kit will be ordered in addition to the replacement PEU for motorcycles with silver trim.
L1014	2025-09-09. Service bulletin. SERVICE BULLETIN L1014: S2 INSTRUMENT MODULE DISPLAYING WRENCH ICON. PURPOSE: This bulletin informs dealers that some S2 Del Mar and Mulholland vehicles may incorrectly have the wrench icon (maintenance required) illuminated at the time of Predelivery Inspection (PDI). The wrench icon is a time-based service reminder and should only first come on two years after the date of manufacture. The Body Control Module (BCM) controls the display of this icon and may have its internal clock altered incorrectly by the Telematic Control Unit (TCU). NOTE: Correction of Communication Date in portal transaction ID: 24MC11001286 due to new portal interface use.
L1019	2025-09-09. Service campaign. PRODUCT PROGRAM COMMUNICATION L1019 OWNER LETTER: PRODUCT PROGRAM 1901 S2 TCU REPLACEMENT. PURPOSE: Owner letter to LiveWire® S2 Motorcycle Owners indicating this notice applies to your motorcycle, VIN # and communicates important product program information for LiveWire Product Program # 1901, MY24 LiveWire® S2 TCU Software.
L1019	2025-09-09. Service campaign. PRODUCT PROGRAM COMMUNICATION L1019 FAQ: PRODUCT PROGRAM 1901 S2 TCU REPLACEMENT. PURPOSE: DEALER LETTER COMMUNICATING FREQUENTLY ASKED QUESTIONS (FAQ) for Product Program 1901, MY24 LiveWire® S2 TCU Software in support of SERVICE BULLETIN L1019: PRODUCT PROGRAM 1901 S2 TCU REPLACEMENT.
L1019	2025-09-09. Service campaign. PRODUCT PROGRAM COMMUNICATION L1019 DEALER LETTER: PRODUCT PROGRAM 1901 S2 TCU REPLACEMENT. PURPOSE: DEALER LETTER COMMUNICATING IMPORTANT PRODUCT PROGRAM INFORMATION, Product Program 1901, MY24 LiveWire® S2 TCU Software in support of SERVICE BULLETIN L1019: PRODUCT PROGRAM 1901 S2 TCU REPLACEMENT.
L1019	2025-09-09. Service bulletin. SERVICE BULLETIN L1019: PRODUCT PROGRAM 1901 S2 TCU REPLACEMENT. PURPOSE: LiveWire EV, LLC has identified that certain S2 motorcycles do not recognize the full connectivity benefit due to the lack of completion of regularly scheduled Firmware Over The Air (FOTA) updates. Certain S2 motorcycle’s Telematic Control Unit (TCU) that have not been updated to the latest software version which prevents full operation of the TCU and the motorcycle’s ability to receive FOTA updates will need to be inspected and the TCU replaced. Vehicle performance and safety are not affected. Additionally, there is an upcoming cloud update scheduled for August 31st, 2025, which will prevent motorcycles with these early TCU software versions from connecting to cloud services. If the affected vehicle's TCU is not updated by this time, connected service within the LiveWire S2 mobile app will cease to function.
L1016	2025-09-09. Service bulletin. SERVICE BULLETIN L1016 (REV C): S2 TCU UPDATE PROCEDURE FOR V4.0.6 AND EARLIER. PURPOSE: Revision C. This bulletin informs that this procedure should be followed when troubleshooting or updating Telematic Control Unit (TCU) software when version 4.0.6 or earlier is installed in the module. This procedure improves the likelihood of gaining and maintaining TCU connectivity, and reduces the need to replace the module. Revision C: Updated: Supplemental Procedure Video. Add video link.