GROUP

MODEL

Service Campaign

2022-2023MY
EV6 (CV)
All except GT model and
2023-2024MY
Niro EV (SG2 EV)

NUMBER

DATE

SC273 (Rev 1, 08/17/2023)

July 2023

VOLUNTARY SERVICE CAMPAIGN
SUBJECT:

VCU SOFTWARE LOGIC UPGRADE (SC273)

 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 to upgrade the software logic of the Vehicle Control Unit (VCU) on certain
2022-2023MY EV6 (CV) vehicles produced from November 17, 2021 through May 30, 2023, and 20232024MY Niro EV (SG2 EV) vehicles produced from July 11, 2022 through June 30, 2023, in order to enhance
the following two (2) functions:
1.

Illumination of Brake lamp without depressing the brake pedal when the vehicle is quickly decelerating
by way of regenerative braking in ‘i-Pedal’ mode.

2.

Shift operation gear selection into Park (P) automatically when the auxiliary battery’s (12V) voltage is
critically low and the vehicle is stopped.

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
To assure complete customer satisfaction, always remember to refer to KDealer+ Warranty
Coverage (validation) Inquiry Screen (Service → Warranty Coverage → Warranty Coverage Inquiry)
for a list of any additional campaigns that may need to be performed on the vehicle before returning
it to the customer.

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 (SC273)

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
691.CV VCU S/W UPGRADE
699.SG2 EV 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: SC273 (Rev 1) EV6 (CV), Niro EV (SG2 EV) July 2023

Page 3 of 8

VCU SOFTWARE LOGIC UPGRADE (SC273)

SUBJECT:

ROM ID INFORMATION TABLE:
Upgrade Event #691 or #699
Model

EM

IMMO

ECU P/No.

ROM ID
Previous

New

CV1A-N0-SB0-V400
CV1A-N0-SB1-V400
CV1A-N0-SB2-V400
39751 1XCN1

CV1A-N0-SB3-V400

CV1A-N0-SB5-V400

CV1A-N0-SB4-V400
CV1A-N0-SD2-V400
EV6

VCU

(CV)

CV1A-N0-SD3-V400

Yes

CV1A-N0-KB0-V200
CV1A-N0-KB1-V200
CV1A-N0-KB2-V200
39751 1XCN4

CV1A-N0-KB3-V200

CV1A-N0-KB5-V200

CV1A-N0-KB4-V200
CV1A-N0-KD2-V200
CV1A-N0-KD3-V400
SG2B-N0-K00-V200
Niro EV

VCU

(SG2 EV)

Yes

39751 0ESN1

SG2B-N0-K01-V200
SG2B-N0-K02-V200

SG2B-N0-K04-V200

SG2B-N0-K03-V200

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.

Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.

TSB: SC273 (Rev 1) EV6 (CV), Niro EV (SG2 EV) July 2023

Page 4 of 8

VCU SOFTWARE LOGIC UPGRADE (SC273)

SUBJECT:

2.

With the ignition ON, turn ON the KDS tablet.
Select ‘KDS’ from the home screen.

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 #691 or #699.

 NOTICE
The vehicle must be identified in
Vehicle Selection to download an
Event for that vehicle.

KDS
screenshot
shown
above
is
for
demonstration purposes only. Events shown in
screenshot are not applicable to this bulletin.

Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.

TSB: SC273 (Rev 1) EV6 (CV), Niro EV (SG2 EV) July 2023

Page 5 of 8

VCU SOFTWARE LOGIC UPGRADE (SC273)

SUBJECT:

6.

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.
7a.

Select the ‘VCU’ system under the System
selection menu.

7b.

Select the applicable Upgrade Event #691.CV

D

VCU S/W UPGRADE or Event #699.SG2EV 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: SC273 (Rev 1) EV6 (CV), Niro EV (SG2 EV) July 2023

Page 6 of 8

VCU SOFTWARE LOGIC UPGRADE (SC273)

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: SC273 (Rev 1) EV6 (CV), Niro EV (SG2 EV) July 2023

Page 7 of 8

VCU SOFTWARE LOGIC UPGRADE (SC273)

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 VCU: 39751-1XCN1

5401

CV VCU: 39751-1XCN4

5201

SG2 EV VCU : 39751-0ESN1

1015

1.

Within the ECU Upgrade screen displayed, select Manual Mode.

2.

Select the ‘VCU’ system under the System selection menu. Select Upgrade Event #691 or #699 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: SC273 (Rev 1) EV6 (CV), Niro EV (SG2 EV) July 2023

Page 8 of 8

VCU SOFTWARE LOGIC UPGRADE (SC273)

SUBJECT:

AFFECTED VEHICLE RANGE:
Model

Production Date Range

EV6 (CV)

November 17, 2021 to May 30, 2023

Niro EV (SG2 EV)

July 11, 2022 to June 30, 2023

REQUIRED TOOL:
Tool Name

Figure

Comments

KDS

Kia Diagnostic System

WARRANTY INFORMATION:
N Code: N99 C Code: C99
Claim
Type

Causal P/N

Qty.

Repair

Labor Op

Op

Replacement

Description

Code

Time

P/N

(SC273A)
39751 1XCN4

VCU S/W Logic Upgrade

230063R0

EV6 (CV)
R

0.7
M/H

0

N/A
(SC273B)

39751 0ESN1

VCU S/W Logic Upgrade
Niro EV (SG2 EV)

230068R0

Qty.

0

0.6
M/H

 NOTICE
VIN inquiry data for this repair is provided for tracking purposes only. Kia retailers should reference
SC273 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: SC273 (Rev 1) EV6 (CV), Niro EV (SG2 EV) July 2023