Vehicle In

Check for DTCs

HP EOP DTC(s)?
• P1C2D03
• P1C2D1C
• P1C2E92

No
(other DTC(s))

Yes

Driveability
concerns /
leaks?

Yes

Diagnose and repair per
shop manual.

No
TCU Update,
Air Bleeding,
DCT Learning

Vehicle Driving Inspection:
Static, Creep, DTCs, etc.

Inspection
OK?

No

Yes

Vehicle Out

TSB #: 25-AT-001H

Page 5 of 11

SUBJECT:

TCU SOFTWARE UPDATE FOR 8DCT HP EOP SENSORLESS LOGIC

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
AT / Transmission 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, wait at least 5 seconds.
Reassemble and retry the update.

TSB #: 25-AT-001H

Page 6 of 11

SUBJECT:

3.

TCU SOFTWARE UPDATE FOR 8DCT HP EOP SENSORLESS LOGIC

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.

OTA initialization (A) should perform
automatically:
• If OTA initialization performs
automatically, then proceed with the
service procedure.
• If the OTA initialization process fails,
complete it manually under:
S/W Management > CCU_CCNF Central Communication Unit (CCNF)
> OTA Initialization (B).
Follow the instructions on the screen.

A

B

TSB #: 25-AT-001H

Page 7 of 11

SUBJECT:

TCU SOFTWARE UPDATE FOR 8DCT HP EOP SENSORLESS LOGIC

6.

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

7.

Remove the power connector (C) from the
in-cabin fuse box for at least 5 seconds, then
reconnect it.

i

Information

C

Alternatively, disconnect the negative (–)
12V battery terminal, wait at least 5
seconds, then reconnect it.

8.

Start the engine to confirm proper operation of
the vehicle.

9.

Proceed to the Air Bleeding Procedure on
the next page.

NOTICE
If the ECU update fails in Auto Mode, perform the update in Manual Mode using the password(s)
below.
Manual Mode Password:
Event
1125
1126

TSB #: 25-AT-001H

ECM Menu
TMa PE 2.5T 8DCT 954A1-2N250
DN8a N 2.5T 8DCT 954A1-2N060
DN8a N 2.5T 8DCT 954A1-2N061

Password
2250
2060
2061
Page 8 of 11

SUBJECT:

TCU SOFTWARE UPDATE FOR 8DCT HP EOP SENSORLESS LOGIC

Air Bleeding Procedure
1.

Confirm vehicle is set to the following
parameters:
• Vehicle stopped with transmission in
Park (P).
• Ignition switch ON (IG ON).

2.

Connect GDS to the vehicle.

3.

Under S/W Management > Automatic
Transaxle, select Air Bleeding (A).

i

Information

Do NOT operate any other functions
while performing air bleeding.

TSB #: 25-AT-001H

A

Page 9 of 11

SUBJECT:

4.

TCU SOFTWARE UPDATE FOR 8DCT HP EOP SENSORLESS LOGIC

Confirm the Test conditions (B) on the
screen, then select Run (C).
B

When air bleeding is complete, proceed to the
DCT Learning Procedure.

C

DCT Learning Procedure
1.

Under S/W Management > Automatic
Transaxle, select Transmission learning (A).

i

Information

Do NOT operate any other functions
while performing Transmission learning.
A

TSB #: 25-AT-001H

Page 10 of 11

SUBJECT:

2.

TCU SOFTWARE UPDATE FOR 8DCT HP EOP SENSORLESS LOGIC

Confirm the Test conditions (B) on the
screen, then select Run (C).
Proceed to Vehicle Driving Inspection.

B

C

Vehicle Driving Inspection
1.

Static test:
a) Vehicle ignition ON.
b) With brake pedal depressed, shift the
gears as follows:
N > D/N > R/P > D/P > R
c) Confirm vehicle does NOT exhibit
abnormal shock.
d) Repeat steps b and c above 3 times.

2.

Creep test:
a) Vehicle ignition ON.
b) With brake pedal depressed, shift gear
from P to D.
c) With brake pedal depressed, shift gear
from P to R.
d) Confirm that vehicle starts moving
within 1-2 seconds, without engine
hesitation or juddering.
e) Repeat steps b, c, and d above
3 times.

3.

Check for DTCs and any concerns during the
tests in steps 1 and 2, such as brake signal,
gear tightening, hydraulic pressure, etc.

4.

Diagnose and repair per shop manual.
Replace the transmission if issues are found
after a detailed inspection.

TSB #: 25-AT-001H

Page 11 of 11