GROUP

MODEL

ELE

2025MY
Carnival HEV (KA4 HEV)

NUMBER

DATE

386

June 2025

TECHNICAL SERVICE BULLETIN
SUBJECT:

SERVICE ACTON: MCU DTC LOGIC IMPROVEMENT (SA617)

This bulletin provides information to upgrade the Motor Control Unit ‘MCU’ system software on certain
2025MY Carnival HEV (KA4 HEV) vehicles produced from June 27, 2024, through March 19, 2025. The
affected vehicles may exhibit an intermittent Malfunction Indicator Lamp ‘MIL’ illuminated on the instrument
cluster with DTC P0C7300. The DTC is caused by a software logic error within the Integrated Thermal
Management Module ‘ITM’, which controls the coolant flow rate according to the coolant temperature. To
address this concern, follow the procedure outlined in this publication to upgrade the ‘MCU’ system software.
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:
P0C7300 – Motor Electronics Coolant Pump ‘A’ Control Performance

 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 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 SA617
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 5

MCU DTC LOGIC IMPROVEMENT (SA617)

SUBJECT:

Refer to TSB SST081 for instructions to upgrade the ‘MCU’ 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
841.KA4 PE HEV MCU DTC Judgment Logic Improvement (P0C73)

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: SA617 Carnival HEV (KA4 HEV) June 2025

Page 3 of 5

MCU DTC LOGIC IMPROVEMENT (SA617)

SUBJECT:

ROM ID Information Table:
Upgrade Event #841

 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

KA4
HEV

System

IMMO

ECU P/No.

ROM ID
Previous

New

GKADH25NACS1-000

GKADH25NACS2-000

MCU
(Motor

Yes

36601 3DBZ0

Control Unit)

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.

 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.
h VIN.

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

TSB: SA617 Carnival HEV (KA4 HEV) June 2025

Page 4 of 5

MCU DTC LOGIC IMPROVEMENT (SA617)

SUBJECT:

Software Information:

 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.
h VIN.
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.

 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
KA4 HEV PE MCU : 36601-3DBZ0

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

841.KA4 PE HEV MCU DTC Judgment Logic
Improvement (P0C73)

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: SA617 Carnival HEV (KA4 HEV) June 2025

Password
4069

Page 5 of 5

MCU DTC LOGIC IMPROVEMENT (SA617)

SUBJECT:

AFFECTED VEHICLE RANGE:
Model

Production Date Range

Carnival HEV (KA4 HEV)

June 27, 2024 to March 19, 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

Causal P/N

Qty.

Repair

Labor Op

Op

Replacement

Description

Code

Time

P/N

(SA617)
V

36601 3DBZ0

0

MCU DTC
Logic Improvement

250068R0

0.3
M/H

N/A

Qty.

0

Note: 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
SA617 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: SA617 Carnival HEV (KA4 HEV) June 2025