NHTSA ID Number: 11027722
Manufacturer Communication Number: TSB 26-2005
TSB/Document Date: 2026-01-21
Summary
This article supersedes TSB 25-2058 to update: service procedure enhancements, and increase labor operation allowances. Some of the vehicles listed in the Model statement above may exhibit a 12-volt battery drain. This may be due to the software level of various modules such as the gateway module (GWM), accessory protocol interface module (APIM) and driver front seat module (DSM).
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TSB/Document ID: TSB 26-2005
Replacement Service Bulletin Number:
MFR Communication Date: 2026-01-19
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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26-2005
TECHNICAL SERVICE BULLETIN
12 Volt Battery Drain
16 January
2026
This bulletin supersedes 25-2058. Reason for update: Service Procedure enhancements, and increase labor
operation allowances
Model:
Ford
2021-2023 Mustang Mach-E
Markets: Canada, USA
Issue: Some of the vehicles listed in the Model statement above may exhibit a 12-volt battery drain. This may be due
to the software level of various modules such as the GWM, APIM and DSM.
Action: For vehicles that meet all of the criteria in the Issue and Model statements, follow the Service Procedure to
reprogram the GWM, APIM and DSM modules.
Warranty Status: Warranty coverage limits and policies are not altered by a TSB. Warranty coverage limits are
determined by the identified causal part.
Labor Times
Description
Operation
No.
Time
2021-2023 Mustang Mach-E: Download And Run DSM Software Update Application Includes
Time To Clear Codes And Add The Vehicle Story To The Warranty Claim
262005A
0.4
Hrs
2021-2023 Mustang Mach-E: Time To Program GWM Once (Claim With A, Cannot Be
Claimed With B2 Or B3)
262005B1
0.5
Hrs
2021-2023 Mustang Mach-E: Time To Program GWM Twice (Claim With A, Cannot Be
Claimed With B1 Or B3)
262005B2
1.0
Hrs
2021-2023 Mustang Mach-E: Time To Program GWM Three Times (Claim With A, Cannot Be
Claimed With B1 Or B2)
262005B3
1.4
Hrs
2021-2023 Mustang Mach-E: Time To Program APIM Once (Claim With A, Cannot Be
Claimed With C2 Or C3)
262005C1
0.8
Hrs
2021-2023 Mustang Mach-E: Time To Program APIM Twice (Claim With A, Cannot Be
Claimed With C1 Or C3)
262005C2
1.6
Hrs
2021-2023 Mustang Mach-E: Time To Program APIM Three Times (Claim With A, Cannot Be
Claimed With C1 Or C2)
262005C3
2.5
Hrs
2021-2023 Mustang Mach-E: Time To Program TCU Once (Claim With A, Cannot Be Claimed
With D2 Or D3)
262005D1
0.5
Hrs
2021-2023 Mustang Mach-E: Time To Program TCU Twice (Claim With A, Cannot Be
Claimed With D1 Or D3)
262005D2
1.0
Hrs
2021-2023 Mustang Mach-E: Time To Program TCU Three time (Claim With A, Cannot Be
Claimed With D1 Or D2)
262005D3
1.5
Hrs
2021-2023 Mustang Mach-E: Time To Program IPC Once (Claim With A, Cannot Be Claimed
With E2)
262005E1
0.8
Hrs
2021-2023 Mustang Mach-E: Time To Program IPC Twice (Claim With A, Cannot Be Claimed
With E1)
262005E2
1.5
Hrs
262005F1
1.2
Hrs
2021-2023 Mustang Mach-E: Time To Program IPMA Once (Claim With A)
2021-2023 Mustang Mach-E: Time To Program PSCM Once (Claim With A)
2021-2023 Mustang Mach-E: Time To Program ACM Once (Claim With A)
262005G1
0.1
Hrs
262005H1
0.1
Hrs
Repair/Claim Coding
Causal Part:
Condition Code: 04
Service Procedure
1. Download and run the "DSM - Driver Front Seat Module ( DSM) Software Update" application in the FDRS scan
tool.
• Confirm the APIM software version:
- While SYNC is powered up with ignition in run or accessory, go to the settings selection on the
center display screen. Refer to the OWM if settings can not be found.
- Go to General Settings.
- Select About SYNC.
- Find the 5 digit SYNC 4 Software Version.
2. Check the current APIM software level. Is the version in the vehicle at 24127 or higher?
1. Yes - repair is complete.
2. No - proceed to Step 3.
NOTE: The time required to complete this procedure varies depending on several factors including the
number of module software updates required, available internet bandwidth, USB flash drive variability, and
the potential that CAN flashing (software update via the [ DLC]with the [ FDRS] may be required. Connect to
the internet with an ethernet cable, use a USB 3.2 Gen 2 or higher flash drive. When performing USB
software updates, using high speed USB ports on the laptop is recommended for faster file transfer. Refer to
the WSM, Section 418-01A Module Configuration > General Procedures > Module Programming.
3. Run the "Read The Configuration Data" application in FDRS, located in Toolbox > Multi-Module tab.
4. Is there a software update available for any of the following modules?
• GWM
• APIM
• TCU
• IPC
• IPMA
• PSCM (2023 vehicles only)
• ACM (2023 vehicles only)
1. Yes - proceed to Step 5.
2. No - if software level is not at 24127 or higher and there are no modules listed in Step 4 showing an
available update, additional support may be required. Perform normal dealer internal escalation
process outside this TSB. Proceed to Step 13.
5. Prepare and update the software for the GWM, APIM, TCU and IPC. Refer to WSM, Section 418-01A Module
Configuration > General Procedures > Module Programming.
6. Check the current APIM software level. Is the version in the vehicle at 24127 or higher?
1. Yes - proceed to Step 13.
2. No - proceed to Step 7.
7. Are there any updates available for the GWM, APIM, TCU and/or IPC?
NOTE: The option to update a module may not be available until other module(s) are updated to a certain
level. The network test is a confirmation that all modules are at the latest available software. Some repairs
may require multiple network tests to reveal all module dependent software.
1. Yes - proceed to Step 5.
2. No - proceed to Step 8.
8. Is there an IPMA software update available?
1. Yes - update the IPMA and proceed to Step 9. Refer to WSM, Section 418-01A Module Configuration
> Description and Operation > Module Configuration - System Operation and Component Description.
2. No - proceed to Step 9.
9. For 2023 vehicles, is there an PSCM software update available?
1. Yes - update the PSCM and proceed to Step 10. Refer to WSM, Section 418-01A Module
Configuration > Description and Operation > Module Configuration - System Operation and Component
Description.
2. No - proceed to Step 10.
10. For 2023 vehicles, is there an ACM software update available?
1. Yes - update the ACM and proceed to Step 11. Refer to WSM, Section 418-01A Module
Configuration > Description and Operation > Module Configuration - System Operation and Component
Description.
2. No - proceed to Step 11.
11. Are there any updates available for the GWM, APIM, TCU and/or IPC?
NOTE: The option to update a module may not be available until other module(s) are updated to a certain
level. The network test is a confirmation that all modules are at the latest available software. Some repairs
may require multiple network tests to reveal all module dependent software.
1. Yes - proceed to Step 5.
2. No - proceed to Step 12.
12. Check the current APIM software level. Is the version in the vehicle at 24127 or higher?
1. Yes - go to Step 13.
2. No - if software level is not at 24127 or higher and there are no modules listed in Step 4 showing an
available update, additional support may be required. Perform normal dealer internal escalation
process outside this TSB. Proceed to Step 13.
13. Add the vehicle story to warranty claim to support labor operations selected.
1. ID the vehicle in PTS
2. Under the diagnostics tab select vehicle history.
3. Select programming date.
4. Select Story Creator.
5. Select modules programmed.
6. Click on Create Story.
7. Copy Story to warranty comments.
© 2026 Ford Motor Company
All rights reserved.
NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and
equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information
that could assist in proper vehicle service. The procedures should not be performed by "do-it-yourselfers". Do not assume that a condition
described affects your car or truck. Contact a Ford or Lincoln dealership to determine whether the Bulletin applies to your vehicle. Warranty Policy
and Extended Service Plan documentation determine Warranty and/or Extended Service Plan coverage unless stated otherwise in the TSB article.
The information in this Technical Service Bulletin (TSB) was current at the time of printing. Ford Motor Company reserves the right to supersede
this information with updates. The most recent information is available through Ford Motor Company's on-line technical resources.
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