NHTSA ID Number: 11029233
Manufacturer Communication Number: A26-037
TSB/Document Date: 2026-03-03
Summary
Over The Air - Due to a software programming issue of the Telematics Control Unit (TCU, also referred to as TSU), certain functions may not operate as designed when accessed from the Screen Audio display. This condition results in an error message being displayed on the screen indicating "Setting Update Failure" when customers attempt to change certain settings.
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TSB/Document ID: A26-037
Replacement Service Bulletin Number:
MFR Communication Date: 2026-02-24
MFR Internal Campaign ID/Software Version: 1.013.003 or later
Communication Type: Over The Air
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
Service Bulletin
26-037
February 23, 2026
Version 1
Product Update: 2023-25 Accord TCU OTA Software Update for Data
Sharing
APPLIES TO
Year
Model
Trim Level
VIN Range
2023–25
Accord
ALL
Check VIN status in iN for eligibility.
BACKGROUND
Due to a software programming issue of the Telematics Control Unit (TCU, also referred to as TSU), certain functions
may not operate as designed when accessed from the Screen Audio display. This condition results in an error
message being displayed on the screen indicating "Setting Update Failure" when customers attempt to change certain
settings.
CUSTOMER NOTIFICATION
Owners of affected vehicles will be sent a notification of this product update.
Do an iN VIN status inquiry to make sure the vehicle is shown as eligible.
Some vehicles affected by this campaign may be in your new or used vehicle inventory. Repair these vehicles before
they are sold.
CORRECTIVE ACTION
Update the Telematics software.
WARRANTY CLAIM INFORMATION
Operation
Number
Description
Flat Rate
Time
Defect
Code
Symptom
Code
Template
ID
Failed Part Number
0105C9
Update TSU software
0.3 hr
6NL00
FNI00
A26037A
8B100-30A-A74
PARTS INFORMATION
None.
TOOL INFORMATION
None.
CUSTOMER INFORMATION: The information in this bulletin is intended for use only by skilled technicians who have the proper tools,
equipment, and training to correctly and safely maintain your vehicle. These procedures should not be attempted by “do-it-yourselfers,” and
you should not assume this bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this
information applies, contact an authorized Honda
automobile dealer.
© 2026 American Honda Motor Co., Inc. – All Rights Reserved
Page 1 of 2
SOFTWARE INFORMATION
Before beginning the repair, make sure all diagnostic and reprogramming software are updated as listed.
i-HDS Software Version
1.013.003 or later
HDS Software Version
3.105.036 or later
Honda ECU Reprogramming
4.10.0.0 or later
Update only the system(s) and software listed in this service bulletin.
Year/Model
Vehicle System
Program ID (or later)
2023-25 Accord
ALL
TCU
8B010-30A-A070
NOTE:
• Make sure the 12-volt battery is fully charged before starting an update.
• Use only approved VCI devices outlined in Service Bulletin 22-100 Updating Control Units/Modules with the ECU
Reprogramming Application.
• Warranty reimbursement for technician labor is not allowed for routine checking or installation of any available
software update.
• This update will not require entering a service bulletin number.
REPAIR PROCEDURE
1. Use Honda ECU Reprogramming to perform a software update on the TCU (also referred to as TSU).
NOTE:
•
•
For more information about updating vehicle systems, refer to service bulletin 22-100, Updating Control
Units/Modules with the ECU Reprogramming Application.
The update progress may appear to freeze for up to 20 min when installing an update. This is normal and
will progress automatically.
•
The TCU must be in version 8B010-30A-A060 to apply version 8B010-30A-A070. Previous updates may
need to be applied before the current version can be applied, so multiple ignition cycles may be needed.
•
Previous updates may need to be performed be for proceeding with this update.
Page 2 of 2
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