NHTSA ID Number: 10252364
Manufacturer Communication Number: 24-EV-001H
TSB/Document Date: 2024-04-02
Summary
This bulletin provides the procedure to update the ECU software on certain 2021-2022MY IONIQ Plug-in Hybrid (AE PHEV) vehicles that may exhibit a warning light with DTC U1341 due to communication issues with the Integrated Electronic Brake (IEB) during charging in IG3 mode. Follow the procedure in this TSB to update the ECU software logic. • DTC Info: U1341 - ECU-IEB Communication Delay
GROUP
NUMBER
EV Systems
DATE
Technical Service Bulletin
24-EV-001H
MODEL(S)
MARCH 2024
IONIQ PLUG-IN
HYBRID
(AE PHEV)
ECU SOFTWARE UPDATE FOR DTC U1341
SUBJECT:
Description: This bulletin provides the procedure to update the ECU software on certain 2021-2022MY
IONIQ Plug-in Hybrid (AE PHEV) vehicles that may exhibit a warning light with DTC U1341 due to
communication issues with the Integrated Electronic Brake (IEB) during charging in IG3 mode. Follow
the procedure in this TSB to update the ECU software logic.
•
DTC Info: U1341 - ECU-IEB Communication Delay
Applicable Vehicles:
• 2021–2022MY IONIQ Plug-in Hybrid (AE PHEV)
GDS Information:
System
Event #
Description
1039
AE PHEV ECU S/W TO IMPROVE FOR DTC U1341
(*or use a later available event as listed in the GDS ECU Update screen if one is available.)
Warranty Information:
Model
Ioniq Plug-in Hybrid
(AE PHEV)
Op. Code
39110FH1
Operation
ECU Update
Op.
Time
Casual Part
Nature
Code
Cause
Code
0.3
M/H
Refer to
WebDCS for
applicable part to
labor op code
combination
I14
ZZ3
NOTE 1: Normal warranty applies.
NOTE 2: Submit claim on Claim Entry Screen as “Warranty” type.
NOTE 3: This TSB includes Repair validation photos. Op times include VIN, Mileage, and photo
capture of the “ECU update complete” screen as outlined in the Digital Documentation Policy.
NOTE 4: If a part is found in need of replacement while performing this TSB and the affected part is
still under warranty, submit a separate claim using the same repair order. If the affected part is out of
warranty, submit a Prior Approval request for goodwill consideration prior to performing the work.
Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair
ECU SOFTWARE UPDATE FOR DTC U1341
SUBJECT:
Service Procedure:
STUI
This TSB includes Repair validation photos. Refer to the latest Warranty Digital Documentation
Policy for requirements.
NOTICE
You must initially perform the GDS ECU update in Auto Mode.
• If the ECU update starts but then fails in Auto Mode, perform the update in Manual Mode
to recover.
NOTICE
GDS Vehicle Battery Low Voltage Warning:
If voltage is below 12 volts per the GDS warning, then select Back and attach a battery
maintainer or run the vehicle for at least 20 minutes to ensure an adequate battery charge for
reliable update results. Turn ignition back ON, and then retry the ECU update again.
1.
Perform the ECU update in Auto Mode.
Use the ID Check to verify the ROM ID before
updating the software.
i
Information
Refer to TSB 15-GI-001 for additional
information for the ECU update Procedure
For Tablet-Based GDS Mobile.
TSB #: 24-EV-001H
Page 2 of 3
SUBJECT:
ECU SOFTWARE UPDATE FOR DTC U1341
SUBJECT:
2.
STUI
Take a screenshot of the “ECU update
complete” screen using your tablet and
upload to STUI.
3.
After the ECU update process shows 100%
complete, cycle the ignition key to OFF for at
least 10 seconds to reset the control unit.
4.
Perform an All Systems Fault Code search
and erase DTC history that had incidentally
occurred from the ECU update.
5.
Start the vehicle in Ready mode to confirm
proper operation of the vehicle.
ROM ID Information Table:
Model
MY
System
ECU
Part Number
AE PHEV
2021
2022
39110-03918
39110-03932
ROM ID
Old
AEDBS6PGXG50
AEDCS6PGXG61
New
AEDFS6PGXG9F
AEDCS6PGXG9F
Manual Mode Password:
ECM Menu
Password
AE PHEV ECU 39110-03918
9639
AE PHEV ECU 39110-03932
9640
TSB #: 24-EV-001H
Page 3 of 3
SUBJECT:
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TSB/Document ID: 24-EV-001H
Replacement Service Bulletin Number:
MFR Communication Date: 2024-03-12
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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