GROUP

NUMBER

DRIVESHAFT &
AXLE

Technical Service Bulletin
SUBJECT:

DATE

26-TC-001H
MODEL(S)

MAY 2026

PALISADE (LX2)

4WD COUPLING NOISE – 4WD ECU SOFTWARE UPDATE

This TSB supersedes 24-TC-001H to add an updated Description on page 1, updated GDS
Information table and ROM ID Information table on page 2, and updated Manual Mode Password
table on page 6.
Description: Some Palisade (LX2) vehicles may produce noise from AWD coupling vibrations when
making turns caused by a logic error with the All Wheel Drive Electronic Control Unit (AWD ECU). This
bulletin provides instructions to update the AWD ECU to reduce the coupling noise.

Applicable Vehicles:
Model Year

Model

2020-2024

Palisade (LX2)

Drivetrain
4WD

Production Dates
04/10/2019 – 01/10/2024

SST Information:
Tool Name

Tool Number

VCI 3

G0VHNNN06

Figure

Ordering Information
Website:
https://hyundaiessentialtools.com/
Email:
[email protected]

VCI 2

G1XDDMN001

Phone: 1-855-763-9199
Hours: 7 AM – 7 PM CST

NOTE : VCI 2 can NO longer be ordered but can be used for the updates in this TSB.

Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair

4WD COUPLING NOISE – 4WD ECU SOFTWARE UPDATE

SUBJECT:

GDS Information:
Model

System

Event Number*

Description

LX2 4WD Coupling Low Speed Turning Noise
Improving Upgrade
(*or use a later available event listed in the GDS 4WD Control Update screen if one is available.)
Palisade (LX2)

4WD Control

1369

Warranty Information:
Model
Palisade
(LX2)

Operation

Op.
Time

Causal Part

Nature
Code

Cause
Code

4WD ECU Update

0.3
M/H

Refer to WEBLTS
for applicable part
to labor op code
combination

I14

ZZ3

Op. Code

95447F08

NOTE 1: Normal warranty applies.
NOTE 2: Submit claim on Claim Entry Screen as “Warranty” type.
NOTE 3: This TSB includes repair validation photo(s). Op times include VIN, mileage, and photo
capture of the ECU Update “Success” result screen as outlined in the Digital Documentation Policy.
NOTE 4: The incident parts are subject to callback through the normal Warranty Technical Center
(WTC) parts return process. Claim is subject to debit if the part is not returned.
NOTE 5: If any part(s) not subject to this TSB are found in need of replacement while performing the
repair procedure, and the affected part(s) are still under warranty, the dealer may submit a separate
claim using the same repair order. If the part(s) not subject to this TSB are out of warranty coverage,
the dealer has the option to submit a PA Request for goodwill consideration on a case-by-case basis.

ROM ID Information:
Model

Event

System

Palisade
(LX2)

1369

4WD

TSB #: 26-TC-001H

ECU
Part Number
95447-4G500
95447-4G550

ROM ID
Current

Latest

CLX21-XXXB061XS1

CLX21-XXXB070XS3

Page 2 of 6

SUBJECT:

4WD COUPLING NOISE – 4WD ECU SOFTWARE UPDATE

Service Procedure:

DIGITAL DOCUMENTATION
This TSB includes repair validation photos. Refer to the latest Warranty Digital Documentation
Policy for requirements.

NOTICE
You must initially perform the GDS ECU update in Auto Mode.
• If the ECU update starts but then fails in Auto Mode, perform the update in Manual Mode
to recover.

NOTICE
Ensure the vehicle’s battery charge is above 11.0 Volts and the tablet’s battery charge is above
30% before performing a software update to avoid update failure.

i

Information

•

Turn OFF all lamps (do NOT leave head lamp switch in auto mode) and all accessories.

•

Perform update with the ignition switch in the ON position.

•

Do NOT disconnect any cables connected to the vehicle or scan tool during the update.

•

Do NOT start the engine OR place in Ready mode during the update.

•

Do NOT turn OFF the ignition switch during the update.

TSB #: 26-TC-001H

Page 3 of 6

4WD COUPLING NOISE – 4WD ECU SOFTWARE UPDATE

SUBJECT:

ECU Update Procedure
1.

Perform the ECU update in Auto Mode.

i

Information

Refer to TSB # 25-GI-011H, “ECU
Update Procedure for Tablet-Based
GDS-Smart”, for additional information.

2.

Verify the ROM ID by selecting the 4WD
system to scan the vehicle’s current ROM ID.

NOTICE
Check the current ROM ID version and
compare it to the ROM ID Information
table before attempting to perform the
software update.

NOTICE
If the update fails, remove the power
connector from the in-cabin fuse box for
at least 5 seconds. Alternatively,
disconnect the negative (–) 12V battery
terminal and wait at least 5 seconds.
Reassemble and retry the update.

TSB #: 26-TC-001H

Page 4 of 6

4WD COUPLING NOISE – 4WD ECU SOFTWARE UPDATE

SUBJECT:

3.

After the ECU update process shows 100%
complete, follow the prompts on the screen to
cycle the ignition OFF for at least 10 seconds
to reset the control unit (certain models may
take up to 30 seconds).

i

Information

Use the Refresh button to reset the
timer.

4.

DIGITAL
DOCUMENTATION

Using the tablet or GDS screen capture
function, take a screenshot of the ECU
Update “Success” result screen.

Upload the photo to STUI.
NOTE: The VIN/Date/Time/Mileage photo
imprint is NOT required for GDS
screenshots.

5.

Perform an All Systems Fault Code search
and erase DTC history that had incidentally
occurred from the ECU update.

TSB #: 26-TC-001H

Page 5 of 6

SUBJECT:

4WD COUPLING NOISE – 4WD ECU SOFTWARE UPDATE

6.

Start the engine to confirm proper operation of
the vehicle.

7.

The service procedure is now complete.

NOTICE
If the ECU update fails in Auto Mode, perform the update in Manual Mode using the password(s)
below.
Manual Mode Password:
Event

Menu

Password

1369

LX2 (PE) 4WD 95447-4G500/50

6295

TSB #: 26-TC-001H

Page 6 of 6