NHTSA ID Number: 10241445
Manufacturer Communication Number: TSB_ELE305
TSB/Document Date: 2023-09-01
Summary
TECHNICAL SERVICE BULLETIN: VCU SOFTWARE LOGIC UPGRADE (SA541) - This bulletin provides information to upgrade the software logic of the Vehicle Control Unit (VCU) on certain 2023MY EV6 GT (CV GT) vehicles produced from August 25, 2022 through July 20, 2023, to optimize the brake lamp ON/OFF logic to prevent momentary activation and deactivation of the brake lights when regenerative braking is in use while driving over uneven road surfaces (e.g. railroad crossings, raised pavement markers). This condition does not affect brake light activation when the brake pedal is depressed.
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TSB/Document ID: TSB_ELE305
Replacement Service Bulletin Number:
MFR Communication Date: 2023-08-24
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
GROUP
MODEL
ELE
2023MY
EV6 GT (CV GT)
NUMBER
DATE
305
August 2023
TECHNICAL SERVICE BULLETIN
SUBJECT:
VCU SOFTWARE LOGIC UPGRADE (SA541)
This bulletin provides information to upgrade the software logic of the Vehicle Control Unit (VCU) on certain
2023MY EV6 GT (CV GT) vehicles produced from August 25, 2022 through July 20, 2023, to optimize the
brake lamp ‘ON/OFF’ logic to prevent momentary activation and deactivation of the brake lights when
regenerative braking is in use while driving over uneven road surfaces (e.g. railroad crossings, raised
pavement markers). This condition does not affect brake light activation when the brake pedal is depressed.
Follow the procedure outlined in this publication to upgrade the software logic of the VCU system using the
KDS ECU Upgrade function as described in this bulletin on the applicable vehicle. For confirmation that the
latest reflash has been applied to a vehicle you are working on, verify the ROM ID using the table on page 3
of this bulletin. Before conducting the procedure, verify that the vehicle is included in the list of affected VINs.
NOTICE
A Service Action is a repair program without customer notification that is performed during the
warranty period. Any dealer requesting to perform this repair outside the warranty period will
require DPSM approval.
Repair status for a VIN is provided on KDelaer+ (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.
This issue number is SA541.
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 8
VCU SOFTWARE LOGIC UPGRADE (SA541)
SUBJECT:
ECU Upgrade Procedure:
To correct this condition, the ECU should be reprogrammed using the KDS
download, as described in this bulletin.
Upgrade Event Name
693.CV GT VCU S/W UPGRADE
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 GDS 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 if the upgrade cannot be performed, DO NOT
disconnect the KDS/VCI-II. Contact GIT America Help Desk at (888) 542-4371 or Techline.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SA541 EV6 GT (CV GT) August 2023
Page 3 of 8
VCU SOFTWARE LOGIC UPGRADE (SA541)
SUBJECT:
ROM ID INFORMATION TABLE:
Upgrade Event #693
Model
EM
IMMO
ECU P/No.
ROM ID
Previous
New
CV1A N7 S00 V400
EV6
(CV)
VCU
Yes
CV1A N7 S04 V400
CV1A N7 S01 V400
CV1A N7 S02 V400
CV1A N7 S04 V400
CV1A N7 S03 V400
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.
NOTICE
Prior to performing the ECU upgrade, be sure to check that the KDS is fully charged.
1.
Connect the VCI-II to the OBD-II connector,
located
under
the
driver’s
side
of
the
instrument panel.
NOTICE
The ECU upgrade function on KDS
operates wirelessly. It is not necessary
to perform the upgrade via USB cable.
2.
With the ignition ON, turn ON the KDS tablet.
Select ‘KDS’ from the home screen.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SA541 EV6 GT (CV GT) August 2023
Page 4 of 8
VCU SOFTWARE LOGIC UPGRADE (SA541)
SUBJECT:
3.
Confirm communication with VCI (A) and then
configure the vehicle (B) using the ‘AUTO VIN’
(C) feature.
B
A
C
4.
Select ‘ECU Upgrade’.
5.
The KDS will check the server for recently
uploaded
Events
and
then
automatically
download Upgrade Event #693.
NOTICE
The vehicle must be identified in
Vehicle Selection to download an
Event for that vehicle.
6.
KDS
screenshot
shown
above
is
for
demonstration purposes only. Events shown in
screenshot are not applicable to this bulletin.
Select Auto Mode.
CAUTION
Do NOT attempt to perform a Manual
Mode upgrade UNLESS Auto Mode
fails. Always follow the instructions
given on the KDS in either Auto or
Manual mode.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SA541 EV6 GT (CV GT) August 2023
Page 5 of 8
VCU SOFTWARE LOGIC UPGRADE (SA541)
SUBJECT:
7a.
Select the ‘VCU’ system under the System
selection menu.
7b.
Select the applicable Upgrade Event #693.CV
D
GT VCU S/W UPGRADE and select ‘Upgrade’ to
continue.
8.
The ECU upgrade will begin and the progress
of the upgrade will appear on the bar graph.
E
Upgrade part (1/2) (E) will download the
upgrade event to the VCI-II. Upgrade part (2/2)
(F) will upgrade the ECU.
CAUTION
F
Do not touch the system buttons (like
‘Back’,
‘Home’,
‘etc.’)
while
performing ECU Upgrade.
9.
If a “Communication Fail” screen appears, verify
that the VCI-II and KDS are communicating
properly. Select ‘OK’ and restart the from step
4.
NOTICE
If an error notice continues to appear
or
if
the
upgrade
cannot
be
performed, DO NOT disconnect the
KDS/VCI-II. Contact GIT America Help
Desk at (888) 542-4371 or Techline.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SA541 EV6 GT (CV GT) August 2023
Page 6 of 8
VCU SOFTWARE LOGIC UPGRADE (SA541)
SUBJECT:
10.
When instructed on the KDS, turn the ignition
OFF for ten (10) seconds then back on. Select
‘OK’ to continue.
11.
Once the upgrade is complete, select ‘OK’ to
finalize the procedure.
12.
When prompted, select ‘YES’ to check for
Diagnostic Trouble Codes (DTC) and erase any
DTCs stored such as EPS, ESC, and TPMS that
may have been set during the upgrade.
13.
Start the engine to confirm normal operation of
the vehicle.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SA541 EV6 GT (CV GT) August 2023
Page 7 of 8
VCU SOFTWARE LOGIC UPGRADE (SA541)
SUBJECT:
Manual Upgrade Procedure:
NOTICE
The manual upgrade should ONLY be performed if the automatic upgrade fails.
If the automatic upgrade fails, turn the ignition ‘OFF’ for about 10 seconds then place it back in
the ‘ON’ position to reset the control unit BEFORE performing manual upgrade.
See table below for ‘Manual Mode’ passwords.
Manual Mode ECU Upgrade Passwords
Menu
Password
CV eGT VCU : 39751-1XGN1
7393
1.
Within the ECU Upgrade screen displayed, select Manual Mode.
2.
Select the ‘VCU’ system under the System selection menu. Select Upgrade Event #693 and select
Upgrade to continue.
3.
Select the appropriate control unit part number with reference to the ROM ID Information Table on
page 3, and select OK.
4.
Enter the appropriate password from the Manual Mode password table above and select OK.
5.
The upgrade will begin and the progress of the upgrade will appear on the bar graph.
6.
When instructed on the KDS, turn the ignition OFF for ten (10) seconds then back on. Select OK.
7.
Once the upgrade is complete, select OK to finalize the procedure.
8.
When prompted, select YES to check for Diagnostic Trouble Codes (DTC) and erase any DTCs stored
such as EPS, ESC, and TPMS that may have been set during the upgrade.
9.
Start the engine to confirm proper operation of the vehicle.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SA541 EV6 GT (CV GT) August 2023
Page 8 of 8
VCU SOFTWARE LOGIC UPGRADE (SA541)
SUBJECT:
AFFECTED VEHICLE RANGE:
Model
Production Date Range
EV6 GT (CV GT)
August 25, 2022 to July 20, 2023
REQUIRED TOOL:
Tool Name
Figure
Comments
KDS
Kia
Diagnostic System
WARRANTY INFORMATION:
N Code: N99 C Code: C99
Claim
Type
V
Causal P/N
Qty.
39751 1XCN4
0
Repair
Labor Op
Op
Replacement
Description
Code
Time
P/N
(SA541)
VCU S/W Logic Upgrade
230065R0
0.7
M/H
N/A
Qty.
0
NOTICE
VIN inquiry data for this repair is provided for tracking purposes only. Kia retailers should reference
SA541 when accessing the KDealer+ system.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SA541 EV6 GT (CV GT) August 2023
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