NHTSA ID Number: 11027677
Manufacturer Communication Number: SC327Y_TSB_R1
TSB/Document Date: 2026-01-16
Summary
TECHNICAL SERVICE BULLETIN: SUBSEQUENT REPAIR ACTION: ICCU AND FUSE REPLACEMENT (SC327Y) - This bulletin provides information related to the Technical Service Bulletin previously published under SC327, titled “ICCU and Fuse Inspection/Replacement and ICCU Software Upgrade.” If DTC P1A9096 is present or stored after ICCU Software Upgrade has been performed per SC327, follow the instructions in this bulletin to replace the ICCU and ICCU fuse.
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TSB/Document ID: SC327Y_TSB_R1
Replacement Service Bulletin Number:
MFR Communication Date: 2026-01-16
MFR Internal Campaign ID/Software Version: SC327Y
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
GROUP
MODEL
Subsequent Repair Action
2022-2024MY
EV6, EV6 GT (CV)
NUMBER
DATE
SC327Y (Rev 1, 01/15/2026)
December 2024
SUBSEQUENT REPAIR ACTION
SUBJECT:
ICCU AND FUSE REPLACEMENT (SC327Y)
NOTICE
This bulletin has been revised to include additional information. New/revised sections of this
bulletin are indicated by a black bar in the margin area.
This bulletin provides information related to the Technical Service Bulletin previously published under SC327,
titled “ICCU and Fuse Inspection/Replacement and ICCU Software Upgrade.” If DTC P1A9096 is present or
stored after ICCU Software Upgrade has been performed per SC327, follow the instructions in this bulletin to
replace the ICCU and ICCU fuse. Before conducting the procedure, verify that the vehicle is included in the
list of affected VINs.
DTC Description:
P1A9096 – DC/DC Converter Input Voltage Sensor Fault
NOTICE
There is no charge to the vehicle owner for this repair. Under applicable law, you may not sell or
otherwise deliver any affected vehicle until it has been repaired pursuant to the procedures set forth
in this bulletin.
Repair status for a VIN is provided on KDealer+ (Service → Warranty Coverage → Warranty
Coverage Inquiry → Campaign Information). Not completed Recall / Service Action reports are
available on KDealer+ (Consumer Affairs → Not Completed Recall → Recall VIN → Select Report),
which includes a list of affected vehicles.
A printed copy is for reference only; publication information can be updated at any time.
Always refer to KGIS for the latest information. After logging in kdealer.com, the newest technical
publications are listed in ‘Service Releases’ and has the latest service information that has been released.
Page 2 of 12
ICCU & FUSE REPLACEMENT (SC327Y)
SUBJECT:
Flowchart:
‘Vehicle In’ with DTC P1A9096 (after completing SC327 with the latest software)
•
If DTC is stored, replace the ICCU Assembly + ICCU Fuse (Page 5)
DTC P1A9096 Stored + ICCU Assembly and ICCU Fuse Replacement
Is the ‘new’ ICCU Assembly marked with a letter “O”?
•
No – Take a KDS Warranty Attachment photo of ICCU + Update the ICCU software
(Pages 3-4)
•
Yes – Vehicle OUT
Vehicle In
KDS DTC Scan
DTC P1A9096 Stored
Create VDN.
Replace the ICCU Assembly and
ICCU Fuse
Update
ICCU
Software
NO
Is the new
ICCU marked
with a O
YES
Vehicle Out
IMPORTANT
A Vehicle Diagnosis Number (VDN) must be created prior to ICCU replacement. If a VDN is not
created, Parts Ordering and Warranty claim submission issues WILL occur. Any associated claims
for ICCU replacement are subject to Warranty review and chargeback. Take a KDS Warranty
Attachment photo of a new ICCU assembly installed that IS NOT marked with a “O” (page 9, step
21) as the software will need to be upgraded. The software is pre-installed in ICCU assemblies
marked with a “O” only.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC327Y (Rev 1) EV6, EV6 GT (CV) December 2024
Page 3 of 12
ICCU & FUSE REPLACEMENT (SC327Y)
SUBJECT:
ICCU
ECU Upgrade Procedure:
To correct this condition, the ECU should be reprogrammed using the KDS
download, as described in TSB SST081.
Upgrade Event Name
786.CV/CV eGT ICCU LDC FET Protection Logic Improvement (2nd)”
NOTICE
•
Confirm a fully charged battery (12.3 volts or higher is necessary) is used or utilize a fully
charged jump starter box connected to the battery.
•
Ensure the KDS is sufficiently charged at 60% or higher prior to reflash.
•
All ECU upgrades must be performed with the ignition set to the ‘ON’ position unless otherwise
stated.
•
Damaged VCI II units should not be used and promptly replaced.
•
Be careful not to disconnect the VCI-II connected to the vehicle during the ECU upgrade
procedure.
•
DO NOT start the engine during ECU upgrade.
•
DO NOT turn the ignition key ‘OFF’ or interrupt the power supply during ECU upgrade.
•
When the ECU upgrade is completed, turn the ignition ‘OFF’ and wait 10 seconds before
starting the engine.
•
ONLY use approved ECU upgrade software designated for the correct application.
IMPORTANT
It is recommended to ALWAYS check the Electronic Parts Catalog (EPC) to locate the ECU Part
Number respective to Auto/Manual Mode ROM IDs. DO NOT reference the parts label affixed to
the ECU.
NOTICE
If a ‘Communication Fail’ error notice appears or the upgrade cannot be performed, DO NOT
disconnect the KDS/VCI-II. Contact GIT America Help Desk at (888) 542-4371 or Techline.
NOTICE
Before attempting an ECU upgrade on any Kia model, make sure to first determine whether the
applicable model is equipped with an immobilizer
(IMMO) security system. Failure to follow
proper procedures may cause the PCM to become inoperative after the upgrade and any claims
associated with this repair may be subject to chargeback.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC327Y (Rev 1) EV6, EV6 GT (CV) December 2024
Page 4 of 12
ICCU & FUSE REPLACEMENT (SC327Y)
SUBJECT:
ROM ID INFORMATION TABLE:
Upgrade Event #786
Model
SYSTEM
IMMO
ECU P/No.
ROM ID
Previous
New
ECV1E1 IDS51R000
ECV1E1 IDS03R000
ECV1E1 IDS05R000
ECV1E1 IDS07R000
EV6, EV6 GT
(CV)
ICCU
Yes
36401 1XFA0
ECV1E1 IDS08R000
ECV1E1 IDS09R000
ECV1E3 IDS14R000
ECV1E3 IDS10R000
ECV1E3 IDS11R000
ECV1E3 IDS12R000
ECV1E3 IDS13R000
To verify the vehicle is affected, be sure to check the Calibration Identification of the vehicle's ECM ROM ID
and reference the Information Table as necessary.
Refer to TSB SST081 for instructions to upgrade the ‘ICCU’ system:
UPGRADE EVENT:
#786.CV/CV eGT ICCU LDC FET Protection Logic
Improvement (2nd)
NOTICE
Prior to performing the ECU upgrade, be
sure to check that the KDS is fully charged.
Manual Mode ECU Upgrade Passwords
No.
786
Menu
CV, CV GT ICCU : 36401-1XFA0
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC327Y (Rev 1) EV6, EV6 GT (CV) December 2024
Password
1612
Page 5 of 12
ICCU & FUSE REPLACEMENT (SC327Y)
SUBJECT:
ICCU
Replacement Procedure: (ICCU & FUSE)
1.
Open the hood and open the auxiliary battery
(12V) service cover and fuse (A).
A
+
2.
Open the hood and disconnect the battery
negative (-) post cable.
3.
Remove the room junction block cover and
disconnect the service interlock connector (B).
NOTICE
It takes at least 5
minutes
for
capacitor of the high voltage battery
system to discharge completely.
B
+
WARNING
Failure to follow the High Voltage
Shut-off Procedure may result in
serious electrical injuries.
4.
Open the coolant reservoir tank pressure cap
(C) to release pressure.
C
+
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC327Y (Rev 1) EV6, EV6 GT (CV) December 2024
Page 6 of 12
ICCU & FUSE REPLACEMENT (SC327Y)
SUBJECT:
5.
Remove the rear under cover (D).
Note: Long Range model shown for reference
D
use only. Standard range will appear different.
+
Tightening torque for nuts:
5.8 – 8.7 lb.ft (7.8 – 11.8 N.m)
6.
Disconnect the ICCU Connector (E).
WARNING
Be sure to read and follow the
and
E
Caution” information on KGIS when
+
“General
Safety
Information
working with a High Voltage system.
Failure to do so can result in serious
electrical injuries.
7.
Remove the front rear under cover (F).
F
Note: Image shown for reference only. The
+
front under cover does not need to be
removed.
Front of Battery
8.
Disconnect
the
blue
rear
hose
connector (G).
G
Rear of Battery
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC327Y (Rev 1) EV6, EV6 GT (CV) December 2024
Page 7 of 12
ICCU & FUSE REPLACEMENT (SC327Y)
SUBJECT:
ICCU
9.
Disconnect the front coolant green hose
connector (H).
H
Front Right Side of Battery
10.
Using shop air, blow out the ICCU coolant from
the blue rear disconnected coolant hose.
TECH TIP
Wearing a rubber glove, create a
tight seal using hand when blowing
into the blue hose connector end.
Note: Use a drain pan to collect the coolant
fluid from the front disconnected hose.
11.
Remove the rear seat assembly (I) by referring
to “Body Interior and Exterior → Rear Seat
Assembly → Removal and Installation” in the
applicable Shop Manual on KGIS.
I
12.
Remove the left (LH) and right (RH) side rear
door scuff trim (J).
J
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC327Y (Rev 1) EV6, EV6 GT (CV) December 2024
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