GROUP

MODEL

Voluntary Service

2025MY

Campaign

EV6 (CV1a)

NUMBER

DATE

SC343

June 2025

VOLUNTARY SERVICE CAMPAIGN
PDC LOGIC IMPROVEMENT (SC343)

SUBJECT:

This bulletin provides information to upgrade the Powernet Domain Control ‘PDC’ system software on certain
2025MY EV6 (CV1a) vehicles produced from December 10, 2024 through June 24, 2025, built at a Kia
assembly plant in the US. Due to a PDC software logic error in the subject vehicle, the pre-charge resistor may
become damaged if the vehicle is abnormally turned ‘OFF’ (e.g. turned ‘OFF’ while the gear selection is in
‘Neutral’). If the pre-charge resistor becomes damaged, the vehicle may not go into ‘READY’ mode. Customers
may experience the illumination of the service warning light, and the vehicle may set DTC P1B7700. Follow
the procedure outlined in this publication to apply the improved logic to the ‘PDC’ system using the KDS ECU
Upgrade function as described in this bulletin. Refer to SST081 for software upgrade instructions using Kia
Diagnostic System (KDS) tablet and VCI-II and confirm the Upgrade Event Number/Name, ROM ID
Information, and Manual Mode passwords (if applicable) on the applicable vehicle.
This software upgrade may also be available via an Over-the-Air (OTA) update on vehicles with an ‘active’ Kia
Connect subscription.
DTC Description:
P1B7700 – Inverter Capacitor Precharging Fault

 NOTICE
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.
This issue number is SC343.
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 6

PDC LOGIC IMPROVEMENT (SC343)

SUBJECT:

Refer to TSB SST081 for instructions to upgrade the ‘PDC’ system:
To correct this condition, the specified system module should be reprogrammed using KDS
as described in this bulletin in ‘Auto Mode’.
Upgrade Event Name
856.CV1a PE PDC Logic Improvement (EV Ready Failure & DTC P1B77)

Connect the negative (-) terminal to the battery as shown below.


Before attempting an ECU upgrade on any Kia model, make sure to first determine whether the
applicable model is equipped with an immobilizer

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

TSB: SC343 EV6 (CV1a) June 2025

Page 3 of 6

PDC LOGIC IMPROVEMENT (SC343)

SUBJECT:

ROM ID Information Table:
Upgrade Event #856

 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.

Model

System

ECU P/No.

Powernet Domain
CV1a

Control
(PDC)

ROM ID
Previous

91960 XG000

2471

91960 XG010

2491

New

2521

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.

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

TSB: SC343 EV6 (CV1a) June 2025

Page 4 of 6

PDC LOGIC IMPROVEMENT (SC343)

SUBJECT:

Service Mode Procedure :
1.

Power the vehicle ‘ON’.

2.

Open the driver door.

3.

While holding the right side ‘MUTE’ button on
the steering wheel, press the left ‘UP/DOWN’
button UPWARDS five (5) times.

4. Confirm the vehile is in ‘Service Mode’.

5. Proceed to the ‘Software Information’ on page
5.

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

TSB: SC343 EV6 (CV1a) June 2025

Page 5 of 6

PDC LOGIC IMPROVEMENT (SC343)

SUBJECT:

Software Information:
The required software must be installed by selecting
the ‘Auto Mode’ ECU Upgrade option.
Note: In some case, the ‘Manual Mode’ installation
option may be required ONLY if the ‘Auto Mode’
function fails or is otherwise noted above.

 IMPORTANT
The software update may also be available via Over-The-Air (OTA) upgrade feature through an
‘active’ Kia Connect account for customers. An OTA software upgrade may not be available at the
time a TSB publication is released. Dealers can confirm OTA availability by checking for OTA release
notes on the Kia Owners Portal: OTA Software Update Release Notes. If the affected vehicle had
the latest software installed via OTA, no further action is required by the dealer.
Note: An OTA installed software is time-stamped for each VIN.

 NOTICE
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 the manual upgrade.

‘Manual Mode’ passwords.
Menu
CV1a PE PDC : 91960-XG000/10

Password
0100

UPGRADE EVENT:
Select the applicable ‘PDC’ system module and the
Event Group.
•

856.CV1a PE PDC Logic Improvement (EV
Ready Failure & DTC P1B77)

Verify the affected vehicle Calibration Identification of
the applicable ECU ROM ID and reference the
Information Table on page 3 as necessary.

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

TSB: SC343 EV6 (CV1a) June 2025

Page 6 of 6

PDC LOGIC IMPROVEMENT (SC343)

SUBJECT:

AFFECTED VEHICLE RANGE:
Model

Production Date Range

EV6 (CV1a)

December 10, 2024 through June 24, 2025

REQUIRED TOOL:
Tool Name

Part Number

Kia Diagnostic System

Figure

Comments

N/A

(KDS)

KDS + VCI

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

R

Causal P/N

Qty.

91960 XG010

0

Repair

Labor Op

Op

Replacement

Description

Code

Time

P/N

(SC343)
PDC Logic Improvement

250A32R0

0.3
M/H

N/A

Qty.

0

Note: Refer to Warranty Bulletin 2025-18 for claim submission procedures. For Substitute
Transportation policy, please refer to Service Policy and Procedures Manual (SPPM) 6.11 “Kia Substitute
Transportation”.

 NOTICE
VIN inquiry data for this repair is provided for tracking purposes only. Kia retailers should reference
SC343 when accessing the KDealer+ system.

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

TSB: SC343 EV6 (CV1a) June 2025