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

Engine

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

Engine

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: