GROUP
TRA

NUMBER
079

MODEL
2013-2015MY
Optima Hybrid
(TF HEV)
DATE
August 2018

TECHNICAL SERVICE BULLETIN
SUBJECT:

SERVICE ACTION: HCU/TCU LOGIC IMPROVEMENT
FOR DTC P1744 (400 MESH EQUIPPED TRANS) (SA351)

This bulletin provides the procedure to improve the logic of the Hybrid Control Unit (HCU) and
the Transmission Control Unit (TCU) on some 2013-2015MY Optima Hybrid (TF HEV)
vehicles, produced from September 27, 2012 through September 5, 2014, which may
experience a malfunction indicator lamp illumination with DTC P1744. To correct this concern,
apply the improved logic to the HCU and TCU 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 2 of this bulletin.
DTC P1744 – Transmission Engine Clutch System Performance

Kia Diagnostic System (KDS)

 NOTICE
This TSB only applies to vehicles equipped with a 400 Mesh solenoid transmission.
For additional information about identifying 400 Mesh Transmissions and/or in the
case of an automatic transmission having been replaced with a 100 Mesh solenoid
valve equipped unit (from 400 Mesh to 100 Mesh), refer to TSB TRA059.

 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 WebDCS (Service → Warranty Coverage →
Warranty Coverage Inquiry → Campaign Information). Not completed Recall / Service
Action reports are available on WebDCS (Consumer Affairs → Not Completed Recall
→ Recall VIN → Select Report), which includes a list of affected vehicles.
This issue number is SA351.
File Under:
Circulate To:

X General Manager


X Service Advisors


X Technicians


X Service Manager


X Parts Manager


X Body Shop Manager  Fleet Repair


Page 2 of 9

SERVICE ACTION: HCU/TCU LOGIC IMPROVEMENT
FOR DTC P1744 (400 MESH EQUIPPED TRANS) (SA351)

SUBJECT:

ECU Upgrade Procedure:
To correct this condition, the ECU(s) should be reprogrammed using the KDS
ECU Upgrade function, as described in this bulletin.
Upgrade Event Name
335.TF HEV HCU MIL ON DTC (P1744) LOGIC IMPROVEMENT (FOR 400MESH)
336.TF HEV TCU MIL ON DTC (P1744) LOGIC IMPROVEMENT (FOR 400MESH)

 NOTICE


A fully charged battery is necessary before ECU upgrade can take place. It is
recommended that the Midtronics GR8-1299 system be used in ECU mode during
charging. DO NOT connect any other battery charger to the vehicle during ECU
upgrade.
All ECU upgrades must be done with the ignition key in the ‘ON’ position.
Be careful not to disconnect the VCI-II connected to the vehicle during the ECU
upgrade procedure.
DO NOT start the engine during ECU upgrade.
DO NOT turn the ignition key ‘OFF’ or interrupt the power supply during ECU
upgrade.
When the ECU upgrade is completed, turn the ignition ‘OFF’ and wait 10 seconds
before starting the engine.
ONLY use approved ECU upgrade software designated for the correct model, year.








 NOTICE
Before attempting an ECU upgrade on any Kia model, make sure to first determine
whether the particular 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.

ROM ID INFORMATION TABLE:
Upgrade Event 335, 336 (TF HEV)
Model

MY

SYS

IMMO

13MY
HCU

Yes

ECU P/No.

39700-2G104
39700-2G102

TF
HEV

ROM ID
Previous

New

GYFEDNEH HS0-C000
GYFEDNEH HS1-C000
GYFEDNEH HS2-C000
GYFEDNEH HS3-C000
GYFEDNEH HS4-C000
GYFEDNEH HS5-C000
GYFEDNEH HS6-C000
GYFEDNEH HS7-C000
GYFEDNEH HS8-C000
GYFEDNEH HS9-C000

GYFEDNEH HSA-C000

39700-2G120
GYFEENEH HS0-C000
GYFEENEH HS1-C000
39700-2G103
39108-2G912
TTF2H24SA4
13MY
TTF2H24SA9
39108-2G915
TTF2H24SA6
TCU
14-15MY
39108-2GAN0
TTF2H24SA7
TTF2H24SA9
To verify the vehicle is affected, be sure to check the Calibration Identification of the vehicle's ECU ROM
ID and reference the Information Table as necessary.
14-15MY

TSB: SA351 Optima Hybrid (TF HEV) August 2018

Page 3 of 9
SUBJECT:

SERVICE ACTION: HCU/TCU LOGIC IMPROVEMENT
FOR DTC P1744 (400 MESH EQUIPPED TRANS) (SA351)

 NOTICE
Prior to performing the ECU upgrades, be sure to check that the KDS is fully charged.

1.

Prior to performing the ECU upgrade(s), verify that the vehicle is equipped with a 400
Mesh transmission by referring to page 2 of TSB TRA059.



2.

If the vehicle is equipped with a 400 Mesh transmission, proceed to the next step.
If the vehicle is NOT equipped with a 400 Mesh transmission, no further action is
required.

Connect the VCI-II to the OBD-II
connector, located under the driver’s side
of the instrument panel.

 NOTICE
The ECU upgrade function on
KDS is operating wirelessly. It is
not necessary to perform the
upgrade via USB cable.

3.

With the ignition ON, turn ON the KDS
tablet. Select KDS from the home
screen.

4.

Confirm communication with VCI (A) and
then configure the vehicle (B) using the
AUTO VIN (C) feature.

B
A

C
TSB: SA351 Optima Hybrid (TF HEV) August 2018

Page 4 of 9
SUBJECT:

SERVICE ACTION: HCU/TCU LOGIC IMPROVEMENT
FOR DTC P1744 (400 MESH EQUIPPED TRANS) (SA351)

5.

Select ECU Upgrade.

6.

The KDS will check the server for
recently uploaded Events and then
automatically download Upgrade Events
#335 and #336.

 NOTICE
The vehicle must be identified in
Vehicle Selection to download
an Event for that vehicle.

7.

KDS
screenshot
shown
above is for
demonstration purposes only. Events shown in
screenshot are not applicable to this bulletin.

Select Auto Mode.

CAUTION
Do NOT attempt to perform a
Manual Mode upgrade UNLESS
Auto Mode fails. Always follow
the instructions given on the
KDS in either Auto or Manual
mode.
8.

Select the HCU system under the
System selection menu.
Touch ID Check (D) and confirm that the
latest update is available.
Select Upgrade Event #335 and select
Upgrade to continue.

TSB: SA351 Optima Hybrid (TF HEV) August 2018

D

Page 5 of 9
SUBJECT:

9.

SERVICE ACTION: HCU/TCU LOGIC IMPROVEMENT
FOR DTC P1744 (400 MESH EQUIPPED TRANS) (SA351)

The ECU upgrade will begin and the
progress of the upgrade will appear on
the bar graph. Upgrade part (1/2) (E) will
download the upgrade event to the VCIII. Upgrade part (2/2) (F) will upgrade the
ECU.

CAUTION

E

F

Do not touch the system
buttons (like ‘Back’, ‘Home’,
‘etc.’) while performing ECU
Upgrade.
10. If a “Communication Fail” screen
appears, verify that the VCI-II and KDS
are communicating properly. Touch OK
and restart the procedure from step 4.

 NOTICE
If an error notice continues to
appear or if the upgrade cannot
be
performed,
DO
NOT
disconnect
the
KDS/VCI-II.
Contact GIT America Help Desk
at (888) 542-4371 or Techline.
11. When instructed on the KDS, turn the
ignition OFF for ten (10) seconds then
back on. Touch OK to continue.

12. Once the upgrade is complete, touch OK
to finalize the procedure.

TSB: SA351 Optima Hybrid (TF HEV) August 2018

Page 6 of 9
SUBJECT:

SERVICE ACTION: HCU/TCU LOGIC IMPROVEMENT
FOR DTC P1744 (400 MESH EQUIPPED TRANS) (SA351)

13. When prompted, select No for the
Diagnostic Trouble Codes (DTC) check,
then return to the KDS Home Page and
proceed to the next step.

14. Repeat steps 4-12 and perform Upgrade
Event #336 with the A/T system selected
under the System selection menu.
When prompted, select YES to check for
Diagnostic Trouble Codes (DTC) and
erase any DTCs stored such as EPS,
ESC, and TPMS that may have been set
during the upgrade.

15. After completion of the upgrade(s), reset
the TCU adaptive values in S/W
Management → Automatic Transaxle →
Resetting Auto T/A Values.

TSB: SA351 Optima Hybrid (TF HEV) August 2018

Page 7 of 9
SUBJECT:

SERVICE ACTION: HCU/TCU LOGIC IMPROVEMENT
FOR DTC P1744 (400 MESH EQUIPPED TRANS) (SA351)

16. Perform an Electronic Clutch Fluid
Pressure Calibration by returning to the
KDS home screen then selecting S/W
Management → HEV Control System →
E/C Pressure Adjustment.

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

 NOTICE
The TCM adaptive learning drive
procedure is not needed for this
update.

Manual Upgrade Procedure:

 NOTICE
The manual upgrade should ONLY be performed if the automatic upgrade fails.
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 manual
upgrade.
See table below for Manual Mode passwords.

TSB: SA351 Optima Hybrid (TF HEV) August 2018

Page 8 of 9
SUBJECT:

SERVICE ACTION: HCU/TCU LOGIC IMPROVEMENT
FOR DTC P1744 (400 MESH EQUIPPED TRANS) (SA351)
Manual Mode ECU Upgrade Passwords
Menu

Password

TF HEV 13MY HCU +IMMO/SMK : 39700-2G104

2104

TF HEV 14~15MY HCU +IMMO/SMK : 39700-2G120

2120
2915

TF HEV TCU : 39108-2G912/915/AN0

1.

Within the ECU Upgrade screen displayed, select Manual Mode.

2.

Select the HCU system under the System selection menu. Select Upgrade Event #335
and select Upgrade to continue.

3.

Select the appropriate control unit part number with reference to the ROM ID Information
Table on page 2, and select OK.

4.

Enter the appropriate password from the Manual Mode password table above and select
OK.

5.

The upgrade will begin and the progress of the upgrade will appear on the bar graph.

6.

When instructed on the KDS, turn the ignition OFF for ten (10) seconds then back on.
Touch OK to continue.

7.

Once the upgrade is complete, touch OK to finalize the procedure.

8.

When prompted, select No for the Diagnostic Trouble Codes (DTC) check, then return to
the KDS Home Page and proceed to the next step.

9.

Repeat steps 1-6 and perform Upgrade Event #336 with the A/T system selected under
the System selection menu.
When prompted, select YES to check for Diagnostic Trouble Codes (DTC) and erase any
DTCs stored such as EPS, ESC, and TPMS that may have been set during the upgrade.

10. After completion of the upgrade(s), reset the TCU adaptive values in S/W Management →
Automatic Transaxle → Resetting Auto T/A Values.
11. Perform an Electronic Clutch Fluid Pressure Calibration by returning to the KDS home
screen then selecting S/W Management → HEV Control System → E/C Pressure
Adjustment.
12. Start the engine to confirm proper operation of the vehicle.

 NOTICE
The TCM adaptive learning drive procedure is not needed for this update.

TSB: SA351 Optima Hybrid (TF HEV) August 2018

Page 9 of 9
SUBJECT:

SERVICE ACTION: HCU/TCU LOGIC IMPROVEMENT
FOR DTC P1744 (400 MESH EQUIPPED TRANS) (SA351)

AFFECTED VEHICLE RANGE:
Model

Production Date Range

Optima Hybrid (TF HEV)

September 27, 2012 through September 5, 2014

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

Causal P/N

Qty.

Repair
Description

Labor
Op Code

Op
Time

Replacement
P/N

Qty.

V

39108 2G912

0

(SA351)
Solenoid Valve Type
Inspection Only

180085R1

0.2
M/H

N/A

0

0

(SA351)
Solenoid Valve Type
Inspection (400 Mesh)
& HCU + TCU Logic
Improvement

180085R0

0.4
M/H

N/A

0

V

39108 2G912

 NOTICE
VIN inquiry data for this repair is provided for tracking purposes only. Kia retailers
should reference SA351 when accessing the WebDCS system.

TSB: SA351 Optima Hybrid (TF HEV) August 2018