GROUP

MODEL

TRA

2020MY
Telluride (ON)

NUMBER

DATE

089 (Rev 1, 04/10/2025)

April 2020

TECHNICAL SERVICE BULLETIN
SUBJECT:

TCM MIL ON DTC P074100 LOGIC IMPROVEMENT

SUBJECT:

 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 the procedure to improve the logic of the Transmission Control Module (TCM) on some
2020MY Telluride (ON) vehicles, produced from February 6, 2019, through December 9, 2019, which may
experience lack of engagement of the torque converter damper clutch with illumination of the MIL and DTC
P074100. When this occurs, the vehicle retains motive power, but transmission gear change smoothness can
be affected. To correct this concern, apply the improved logic to the Automatic Transmission (A/T) system
using the KDS ECU Upgrade function as described in this bulletin. 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.
DTC Description:
P074100 – Torque Converter Clutch Circuit Performance or Stuck Off

 NOTICE
A Vehicle Diagnosis Number (VDN) must be created with DTC P074100, prior to performing the
TCM logic improvement. If a VDN is not created, Warranty claim submission issues WILL occur.

 NOTICE
A Technical Service Bulletin is a field fix repair program without customer notification that may be
performed during the warranty period. Any dealer requesting to perform this repair outside the
warranty period will require DPSM approval.
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

TCM MIL ON DTC P074100 LOGIC IMPROVEMENT

SUBJECT:

Refer to TSB SST081 for instructions to upgrade the ‘A/T’ 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
484. ON LAMBDA 3.8GDI 8AT TCU MIL ON DTC (P0741) LOGIC IMPROVEMENT

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

 NO TICE
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: TRA089 (Rev 1) Telluride (ON) April 2020

TCM MIL ON DTC P074100 LOGIC IMPROVEMENT

SUBJECT:

ROM ID Information Table:
Upgrade Event #484 (ON)

 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

EM

TM

Type

IMMO

FWD
ON

Lambda
3.8 GDI

8A/T

ECU P/No.

95441 4GBA0

ROM ID
Previous
TON2G38NB0
TON2G38NB1

New

TON2G38NB2

Yes
AWD

95441 4GBB0

TON4G38NB0
TON4G38NB1

TON4G38NB2

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: TRA089 (Rev 1) Telluride (ON) April 2020

Page 4 of 5

TCM MIL ON DTC P074100 LOGIC IMPROVEMENT

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.

 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
ON LAMBDA 3.8GDI 8AT (2WD) : 95441-4GBA0

4140

ON LAMBDA 3.8GDI 8AT (4WD) : 95441-4GBB0

4141

UPGRADE EVENT:
Select the applicable ‘A/T’ system module and the
Event Group.
•

Password

484. ON LAMBDA 3.8GDI 8AT TCU MIL ON
DTC (P0741) LOGIC IMPROVEMENT

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: TRA089 (Rev 1) Telluride (ON) April 2020

TCM MIL ON DTC P074100 LOGIC IMPROVEMENT

SUBJECT:

AFFECTED VEHICLE RANGE:
Model

Production Date Range

Telluride (ON)

February 6, 2019 to December 9, 2019

REQUIRED TOOL:
Tool Name

Part Number

Kia Diagnostic System

Figure

N/A

(KDS)

Comments

KDS + VCI

WARRANTY INFORMATION:
N Code: I3A C Code: ZZ3
Claim
Type

Type

Causal P/N

FWD

95440 4GBA0

W

Qty.

0
AWD

Repair

Labor Op

Op

Replacement

Description

Code

Time

P/N

TCM Logic
Improvement

95441F11

0.3
M/H

N/A

Qty.

0

95440 4GBB0

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

TSB: TRA089 (Rev 1) Telluride (ON) April 2020