NHTSA ID Number: 11028668
Manufacturer Communication Number: 26-EM-005H TSB
TSB/Document Date: 2026-02-10
Summary
Some Santa Fe (TMA) vehicles may have DTCs P218100, P2181F0, and/or P2181F1 (Cooling System Performance) set in the Electronic Control Unit (ECU), resulting in an illuminated Check Engine warning lamp. Follow the procedure in this TSB to replace the Integrated Thermal Management (ITM) module and update both the Engine Control Module (ECM) and Transmission Control Module (TCM) if applicable. Follow the flowchart in this TSB to update the appropriate modules.
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TSB/Document ID: 26-EM-005H TSB
Replacement Service Bulletin Number:
MFR Communication Date: 2026-02-05
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
•
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.
Manual Mode Password:
Event
GDI
1282
T-GDI
1283
TSB #: 26-EM-005H
ECM Menu
TMA 2.5GDI ECU 39110-2S059
TMA 2.5GDI ECU 39110-2S067
TMA 2.5GDI ECU 39110-2S060
TMA 2.5GDI ECU 39110-2S068
TMA 2.5GDI ECU 39110-2S092/093/274/275
TMA 2.5GDI ECU 39110-2S094/095/276/277
TMA 2.5GDI ECU 39110-2S298
TMA 2.5GDI ECU 39110-2S299
TMA 2.5T GDI ECU 39101-2STN0
TMA 2.5T GDI ECU 39101-2STN5
TMA 2.5T GDI ECU 39101-2STN6/7
TMA 2.5T GDI ECU 39101-2STN8
Password
2059
2067
2060
2068
2092
2094
2298
2299
1020
1025
1026
1028
Page 7 of 20
SUBJECT:
INTEGRATED THERMAL MANAGEMENT (ITM) REPLACEMENT & ECM/TCU
SOFTWARE UPDATE – DTCS P218100, P2181F0, P2181F1
ECM Update Procedure
Information
i
Perform the ECM software update in Manual Mode based on the engine type:
•
•
1.
GDI: Event 1282
T-GDI: Event 1283
Perform the ECM update in Manual 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 ENGINE
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. Reassemble and
retry the update.
TSB #: 26-EM-005H
Page 8 of 20
SUBJECT:
3.
INTEGRATED THERMAL MANAGEMENT (ITM) REPLACEMENT & ECM/TCU
SOFTWARE UPDATE – DTCS P218100, P2181F0, P2181F1
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.
TSB #: 26-EM-005H
Page 9 of 20
SUBJECT:
INTEGRATED THERMAL MANAGEMENT (ITM) REPLACEMENT & ECM/TCU
SOFTWARE UPDATE – DTCS P218100, P2181F0, P2181F1
TCU Update Procedure
1.
Use GDS to check for TCU update in Auto
Mode:
• If the update is NOT available, then go
to the ITM Coolant Filling Mode
procedure.
• If the update is available, then go to the
next step.
o T-GDI: Event 1125
o GDI: Event 1063
2.
Perform the TCU update in Auto Mode.
i
Information
Refer to TSB # 25-GI-011H, “ECU
Update Procedure for Tablet-Based
GDS-Smart”, for additional information.
3.
Verify the ROM ID by selecting the TCU
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. Reassemble and
retry the update.
TSB #: 26-EM-005H
Page 10 of 20
SUBJECT:
4.
INTEGRATED THERMAL MANAGEMENT (ITM) REPLACEMENT & ECM/TCU
SOFTWARE UPDATE – DTCS P218100, P2181F0, P2181F1
DIGITAL
DOCUMENTATION
Using the tablet or GDS screen capture
function, take a screenshot of the TCU
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.
6.
Disconnect the power connector (D) of the
indoor fuse box, wait at least 5 seconds, then
reconnect it.
i
Information
D
Alternatively, disconnect the negative (–)
12V battery terminal, wait at least 5
seconds, then reconnect it.
i
Information
For Event 1063, proceed to the ITM
Coolant Filling Mode procedure.
TSB #: 26-EM-005H
Page 11 of 20
SUBJECT:
INTEGRATED THERMAL MANAGEMENT (ITM) REPLACEMENT & ECM/TCU
SOFTWARE UPDATE – DTCS P218100, P2181F0, P2181F1
Air Bleeding Procedure for Event 1125 (T-GDI)
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 AT – Double Clutch Transmission,
select Air Bleeding (A).
i
Information
Do NOT operate any other functions
while performing air bleeding.
4.
A
Confirm the Test conditions (B) on the
screen, then select Run (C).
B
C
TSB #: 26-EM-005H
Page 12 of 20
SUBJECT:
INTEGRATED THERMAL MANAGEMENT (ITM) REPLACEMENT & ECM/TCU
SOFTWARE UPDATE – DTCS P218100, P2181F0, P2181F1
DCT Learning Procedure for Event 1125 (T-GDI)
1.
Select AT – Double Clutch Transmission,
then select Transmission learning (A).
i
Information
Do NOT operate any other functions
while performing Transmission learning.
A
2.
Confirm the Test conditions (B) on the
screen, then select Run (C).
Proceed to Vehicle Driving Inspection.
B
C
TSB #: 26-EM-005H
Page 13 of 20
SUBJECT:
INTEGRATED THERMAL MANAGEMENT (ITM) REPLACEMENT & ECM/TCU
SOFTWARE UPDATE – DTCS P218100, P2181F0, P2181F1
ITM Coolant Filling Mode
1.
Use GDS to perform the Integrated Thermal
Module Coolant Filling Mode.
Refer to the shop manual:
• Engine Mechanical System > Cooling
System > Coolant > Repair
procedures
!
WARNING
Do NOT remove the radiator cap when
the engine is hot. Serious scalding could
be caused by high-pressured, hot fluid
from the radiator.
NOTICE
Failure to follow the ITM bleeding
procedure under S/W Management in
GDS may result in air pockets and
overheating of the engine.
2.
Start the vehicle to confirm proper operation.
3.
The service procedure is now complete.
i
Information
T-GDI vehicles that received Event 1125,
proceed to the Vehicle Driving
Inspection procedure on the next page.
The service procedure is now complete
for GDI vehicles.
TSB #: 26-EM-005H
Page 14 of 20
SUBJECT:
INTEGRATED THERMAL MANAGEMENT (ITM) REPLACEMENT & ECM/TCU
SOFTWARE UPDATE – DTCS P218100, P2181F0, P2181F1
Vehicle Driving Inspection for Event 1125 (T-GDI)
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 & 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-d above 3 times.
3.
Check for DTCs and any concerns during the
tests in steps 1 & 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.
5.
The service procedure is now complete.
TSB #: 26-EM-005H
Page 15 of 20
SUBJECT:
INTEGRATED THERMAL MANAGEMENT (ITM) REPLACEMENT & ECM/TCU
SOFTWARE UPDATE – DTCS P218100, P2181F0, P2181F1
TCU Manual Mode Passwords:
Event
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