GROUP

NUMBER

Campaign

24-01-018H

DATE

Technical Service Bulletin

MODEL(S)

FEBRUARY 2024

Accent (HC)

TCU UPDATE AND IVT REPLACEMENT
(SERVICE CAMPAIGN 9A9)

SUBJECT:

This TSB supersedes 21-01-038H-1 by including updated OP codes.

 IMPORTANT
Dealers must perform this Service Campaign on all affected vehicles prior to customer retail delivery
and whenever an affected vehicle is in the shop for any maintenance or repair.

Access the “Vehicle Information” screen via WebDCS to identify open campaigns.
Description: Certain Accent (HC) vehicles may experience an illuminated warning light due to
Diagnostic Trouble Codes (DTC) listed below. Perform the TCU update, and, if necessary, replace the
IVT (Intelligent Variable Transmission) to resolve this condition.
•

TCU DTC Codes: P0730, P0731, P0741, P0867, P1603

Applicable Vehicles (Certain): 2020-21MY Accent (HC) Equipped with IVT
Parts Information:
MODEL PART NAME
Accent
(HC)

BEFORE

QTY

AFTER

IVT

48000-2H001

1

48000-2H001QQH

48000-2H001QQHRM*

SP-CVT1

N/A

7 qt.

N/A

00232-19081**

* Use reman part number whenever possible.
** Fluid is for reman units only.
TCU
VEHICLE

ENGINE

PCU P/No.

1.6L

39100-2M358
39100-2M359
39100-2M011
39100-2M012

Accent (HC)

ROM ID
OLD

NEW

CHC0M16NS0

CHC0M16NS1

NOTICE
Performing Section C – IVT, TCU Pressure Learning (Manual transmission relearn and verification)
is critical step. After updating the IVT TCU software complete the pressure learning and verification
(park position leaning value) procedure in order insure the IVT has not been damaged.
Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair

SUBJECT:

TCU UPDATE AND IVT REPLACEMENT (SERVICE CAMPAIGN 9A9)

GDS Information:
System Selection: TRANSMISSION CONTROL UNIT (TCU)
Event #
Description
679
679.HC 1.6MPI – IVT Driving Performance Improvement
*or use a later available event as listed in the GDS TCU Update screen if one is available.
Warranty Information:
MODEL OP CODE PART NUMBER
USED
210M05R5

N/A

210M05R6 48000-2H001QQH
Accent
(HC) 210M05R8

480002H001QQHRM

210M05R7 48000-2H001QQH
210M05R9

480002H001QQHRM

OPERATION

OP
TIME

CAUSAL
PART

NATURE CAUSE
CODE
CODE

Check TCU DTC - Update
TCU - Transmission
Relearn - DTC Check
(NO P1603)

0.3
M/H

480002H001QQH

D34

ZZ3

Check TCU DTC – IVT
Replacement – Update
TCU – Transmission
Relearn

3.2
M/H

480002H001QQH

D34

ZZ3

Check TCU DTC –
Update TCU –
Transmission Relearn –
IVT Replacement –
Transmission Relearn

3.3
M/H

480002H001QQH

D34

ZZ3

Note 1: Submit Claim on Campaign Claim Entry Screen.
Note 2: If a part that is not covered by this campaign is found in need of replacement while performing
Service Campaign 9A9 and the affected part is still under warranty, submit a separate claim using the
same Repair Order. If the affected part is out of warranty, submit a Prior Approval Request for goodwill
consideration prior to performing the work.
Note 3: When using a Reman Transmission, reimbursement for use of transmission fluid will be
provided under labor operations 210M05R8 and 210M05R9.

NOTICE
Read and familiarize with Section C – IVT, TCU Pressure Learning before starting TCU update
process.

TSB #: 24-01-018H

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SUBJECT:

TCU UPDATE AND IVT REPLACEMENT (SERVICE CAMPAIGN 9A9)

TCU Update Flow (HC with IVT)
1.

Refer to the flowchart below to update the procedure.

Op Code: 210M05R6 (48000-2H001QQH)
Op Code: 210M05R8 (48000-2H001QQHRM)

Op
Op Code:
Code: 210M05R5
XXXXXXXXXX

Op Code: 210M05R7 (48000-2H001QQH)
Op Code: 210M05R9 (48000-2H001QQHRM)

NOTICE
1. Use the GDS-M to check the TCU DTC.
2. If one of the DTC(s) P0730, P0731, P0741, P0867, P1603 applies (History, Current, or Pending),
replace the IVT.
3. Replace the IVT according to the applicable vehicle shop manual.
4. After IVT replacement, perform TCU update first, then perform the IVT resetting auto T/A values,
TCU adaptive values learning procedure.

NOTICE
Initially perform GDS TCU Update in Auto Mode.
If the TCU Update starts but then fails in Auto Mode, perform the update in Manual Mode to recover.

TSB #: 24-01-018H

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SUBJECT:

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1.
2.
3.
4.
5.
6.

TCU UPDATE AND IVT REPLACEMENT (SERVICE CAMPAIGN 9A9)

CAUTION

Verify the vehicle battery has reasonable charge.
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 update.
Do not start the engine during update.
Do not turn off the ignition switch during update.

!

WARNING

GDS-M Vehicle Battery Low Voltage Warning:
When the vehicle battery is lower than 12 volts, the GDS-M will trigger a Low Battery Voltage
Warning. If this Warning occurs,
A. Connect the battery to a fully charged battery jump pack or GR8 charger using “Power Supply
Mode” to continue the software update.
OR
B. Select “BACK” to exit the SW update. Then, start the engine and idle with the headlights on for
20 minutes. Return to the SW update after charging the battery.

Service Procedure:
A. Check DTC
1.
Scan the vehicle for any of the following DTC Codes:
P0730, P0731, P0741, P0867
B. Update TCU
1.
Perform GDS Mobile software update per TSB 15-GI-001.

NOTICE
Section C is required to complete the service procedure. The transmission may fail from
not performing IVT, TCU Pressure Learning, and is subject to warranty debit.

TSB #: 24-01-018H

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SUBJECT:

TCU UPDATE AND IVT REPLACEMENT (SERVICE CAMPAIGN 9A9)

C. IVT, TCU Pressure Learning
1.

Perform IVT Resetting Auto T/A Values
using the GDS-M.

2.

Perform the TCU adaptive values learning
procedure.

NOTICE
Learning condition Intelligent Variable
Transmission Fluid (IVTF)
temperature: 86 - 194°F (30 - 90°C)
Start the engine after checking the IVTF
temperature with the Ignition ON.
Engine RPM will rise to approximately
1000 rpm after starting the engine.
After 30-120 seconds, the learning is
completed when the engine RPM reaches
the normal IDLE level.
Use the GDS-M to verify the IVT P-Range
learning is complete, and check TCU for
DTC P1603 (EOL P-Range Pressure
Learning Failed).
(1) If IVT- P Range learning is not
complete, and P1603 is present,
Replace the IVT (Refer to Section D.)
(2) If IVT-P Range is not complete, and
P1603 is not present, the learning
condition has not been met.
Re-perform Section C - IVT, TCU
Learning.

TSB #: 24-01-018H

NOTICE
Learning completion can be confirmed by
using GDS-M to verify the IVT (“CVT”)
P-Range learning value is “ON”.
(“OFF” learning has not been completed)

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TCU UPDATE AND IVT REPLACEMENT (SERVICE CAMPAIGN 9A9)

CAUTION

Do not apply accelerator pedal and brakes, or operate shift levers during P range, learning.
(If operated during learning, re-engage after shutting off)
D. IVT Replacement
1.

If transmission replacement is needed,
follow the applicable shop manual section:

Shop
Manual
2.

IVT System

Repair
Procedures

IVT

If IVT replacement is performed, refer to
Section C for IVT, TCU Learning.

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

Manual Mode Password:
1.
From the GDS-M home screen, select ECU Upgrade.
2.

From the ECU Upgrade screen, select
Manual Mode, then select the Update Event
679.
Update Event
679.HC 1.6MPI – IVT Driving Performance
Improvement

TSB #: 24-01-018H

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SUBJECT:

3.

4.

TCU UPDATE AND IVT REPLACEMENT (SERVICE CAMPAIGN 9A9)

A password prompt will appear. Enter the password and select Upgrade.
MENU

PASSWORD

HC 1.6MPI TCU 39100-2M358/359/011/012

1012

The update will occur.
Once the update finishes, turn the ignition off for 10 seconds, then turn the ignition back on.

5.
6.

Check if any Diagnostic Trouble Codes (DTCs) were created by the update, and clear all
related DTCs.
Reset the TCU adaptive learning values.

7.

Start the engine to confirm the proper operation of the vehicle.

8.

The service procedure is now complete.

TSB #: 24-01-018H

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