NHTSA ID Number: 11023113
Manufacturer Communication Number: 25-01-061H TSB
TSB/Document Date: 2025-09-13
Summary
Certain Tucson (NX4A) vehicles may exhibit a Data Communication Unit (DCU) software error due to the internal timer initialization logic not being implemented. The DCU module may shut down telematics services after one year. This bulletin provides instructions to perform a software update for the DCU module.
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
- Advanced VCI Box, Industry-leading J2534 Pass-Thru...
- High-Speed OEM-Level Diagnostics & Programming: Unlock true...
- Coverage for 17 Car Brands & Ultra Reliability: Works...
- User-Friendly RLink Platform & Expert Support: TOPDON’s...
- 6.6 ft USB-C Cable & Portable Storage Case: The RLink J...
This product presentation was made with AAWP plugin.
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: 25-01-061H TSB
Replacement Service Bulletin Number:
MFR Communication Date: 2025-09-12
MFR Internal Campaign ID/Software Version: TDFC
Communication Type: Service Campaign
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
GROUP
NUMBER
CAMPAIGN
Technical Service Bulletin
25-01-061H
DATE
MODEL(S)
SEPTEMBER 2025
TUCSON (NX4A)
DCU SOFTWARE UPDATE
(SERVICE CAMPAIGN TDFC)
SUBJECT:
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 Tucson (NX4A) vehicles may exhibit a Data Communication Unit (DCU) software
error due to the internal timer initialization logic not being implemented. The DCU module may shut
down telematics services after one year. This bulletin provides instructions to perform a software update
for the DCU module.
Applicable Vehicles (Certain):
Model Year
Model
Production Dates
2025 – 2026
Tucson (NX4A)
06/20/2024 – 08/13/2025
SST Information:
Tool Name
Tool Number
VCI 3
G0VHNNN06
19-Pin Cable
Figure
Remarks
Ordering Information
+
VCI 3 comes with
the 19-pin cable
(P/N G1XDDCA020
included here
for reference)
Website:
https://hyundaiessentialtools.com/
G1XDDCA020
Email:
[email protected]
VCI 2
Ethernet
Communication
Interface (ECI)
Kit
G1XDDMN001
+
G0XDDMN052
If using VCI 2, the
ECI Kit will be
required to
complete software
updates.
Phone: 1-855-763-9199
Hours: 7 AM – 7 PM CST
Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair
DCU SOFTWARE UPDATE (SERVICE CAMPAIGN TDFC)
SUBJECT:
GDS Information:
Model
System
Event Number*
Description
Tucson
NX4 OB PE/NX4 PE/NX4 PE HEV/NX4 PHEV/NX4a
DCU
1297
(NX4A)
PE/NX4m PE DCU LOGIC IMPROVEMENT (NA)
(*or use a later available event listed in the GDS DCU Update screen if one is available.)
NOTE: The software update is subject to an OTA (Over-the-Air) option and may be completed by
customers with active Bluelink Services subscriptions.
Warranty Information:
Model
Op. Code
Operation
Op. Time
Causal Part
Nature
Code
Cause
Code
Tucson (NX4A)
50DA46R0
DCU Software
Update
0.4 M/H
96510-N9140
W11
ZZ3
NOTE 1: Submit claim on Claim Entry Screen as “Campaign” type.
NOTE 2: If a part is found in need of replacement while performing this campaign 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: This TSB includes repair validation photos. Op times include VIN, mileage, and photo
capture of the ECU Update “Success” screen as outlined in the Digital Documentation Policy.
ROM ID Information:
Model
Tucson
(NX4A)
Event
1297
TSB #: 25-01-061H
System
DCU
ECU
Part Number
96510-N9140
ROM ID
Current
Latest
120.NA.011509.011509
120.NA.011606.011606
120.NA.011646.011646
120.NA.011951.011951
120.NA.012054.012054
Page 2 of 7
SUBJECT:
DCU SOFTWARE UPDATE (SERVICE CAMPAIGN TDFC)
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 during the update.
•
Do NOT turn OFF the ignition switch during the update.
TSB #: 25-01-061H
Page 3 of 7
SUBJECT:
DCU SOFTWARE UPDATE (SERVICE CAMPAIGN TDFC)
Configuration of Ethernet Communication on Tablet PC
i
Information
Refer to TSB 23-GI-006H for detailed information on configuring Ethernet communication for
setup.
1.
Connect the Ethernet Communication
Interface (ECI) DLC cable to the OBD
connector of the vehicle.
2.
Connect the VCI DLC cable to the ECI.
3.
Select the appropriate tablet cable
(type C, 5-pin) to the ECI.
4.
Connect the cable to the tablet PC.
i
Information
VCI 2: Connect the GDS tablet (wired) or PC (wireless) using the ECI kit.
VCI 3: Connect the GDS tablet to the vehicle using the 19-pin cable.
TSB #: 25-01-061H
Page 4 of 7
DCU SOFTWARE UPDATE (SERVICE CAMPAIGN TDFC)
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 DCU
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, or disconnect the
negative (–) 12V battery terminal then
wait at least 5 seconds. Reassemble and
retry the update.
i
Information
The screenshots within this service
procedure refers to Tucson Hybrid
, but is
also applicable to Tucson Internal
Combustion Engine (ICE) vehicles.
TSB #: 25-01-061H
Page 5 of 7
DCU SOFTWARE UPDATE (SERVICE CAMPAIGN TDFC)
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.
OTA initialization (A) should perform
automatically:
• If OTA initialization performs
automatically, then proceed with the
service procedure.
•
A
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.
B
TSB #: 25-01-061H
Page 6 of 7
SUBJECT:
5.
DCU SOFTWARE UPDATE (SERVICE CAMPAIGN TDFC)
DIGITAL
DOCUMENTATION
Take a screenshot of the ECU Update
"Success" screen and upload to STUI.
6.
Perform an All Systems Fault Code search
and erase DTC history that had incidentally
occurred from the ECU update.
7.
Start the engine to confirm proper operation of
the vehicle.
8.
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
ECU Menu
Password
1297
NX4A PE DCU 96510-N9140
2419
TSB #: 25-01-061H
Page 7 of 7
- 💝【Questions? We’re Here Anytime】MK808S is a high-end flagship model that connects via wired OBD2 for faster, more stable, and reliable diagnosis compared to B,.T tools. If you have any questions about setup, activation, features, additional accessories, or update subscriptions, please reach us and we will respond promptly to assist you. It includes 1-Year F.ree Updates (124.5 bucks/year after), and most functions still work after expiration except a few online features. Please note some functions like full TPMS are not supported, reach us for model recommendations.
- 🔥🔥🔥【2026 NEWLY RELEASED BI-DIRECTIONAL CONTROL】As the 2026 upgraded version of MaxiChek MX808 MaxiDiag MD909 Pro MD906 Pro, our Newest MK808S auto diagnostic scanner for all cars inherits the powerful Bi-directional Control which makes it the most cost-effective scanner (without breaking the bank, same as MK900BT MS906 PRO MS906MAX). Active test is widely used on car subsystems to help you check if the car actuators are all in good condition. Such as windows, rear mirrors, sunroof, wipers...
- 【28+ MOST POPULAR RESET SERVICE FOR 150 MAKES】Autel versatile OBDII scanenr MK808S, full level-up of MX808, work as MX900, MK900, MK900-BT, supports 150+ car brands worldwide. Like the OBD2 code reader MaxiCOM MK808BT Pro, MK808S is equipped with 28+ hot services including 0il Reset, SAS Calibration, ABS Bleeding, Battery Registration, etc. MK808S ranks top in professional automotive tablets and keeps updating to support more newer modes from 2025 to 2026.
- 【ALL SYSTEM DIAGNOSTICS, FACTORY-LEVEL SCANNER】The MK808S dealer-level scanner, like Snap-on tools, effectively works all cars for all system diagnostics. It reads/clears codes, displays 5-in-1 Live Data, performs active tests, and special functions for all available modules. With a few clicks, you can easily understand the vehicle's condition. The convenient Wi-Fi printing feature allows you to generate a detailed report, highlighting the exact nature of the problem.
- 【AUT0 SCAN & AUT0V1N, 10X FASTER】How much have you spent on car maintenance? Even a minor issue can take up a significant amount of time. The MK808S is designed to improve your work efficiency. With its Aut0V1N technology, you can check your car's make, model, and year information with just one click. The Aut0Scan feature automatically scans all of the vehicle's modules and detects any fault codes. Check Aut0V1N compatibility by reaching us at 📞1-833-436-5880. Available Mon-Fri, 9 AM-6 PM EST.
- 💯【Conta.ct us for Support Directly】If you met any issues about: Received a registered device/ Language Changing/ Function not Support/ Blueto-oth connector malfunction/ Subscription Renewal, please conta.ct us via 📞autelsupply @outlook. com🛣️, we will provide perfect solution for you. ⚠️Note: Autel MK900BT comes with 1-Year Free Software Update, most features will remain active after update subscription expires. For questions regarding updates or need more useful accessories, please conta.ct us via 📞autelsupply @outlook.com🛣️. 2. If you encounter Blueto-oth adapter VCI150 malfunction, please tell us 📞autelsupply @outlook. com🛣️, we will handle it promptly.
- 🔥🔥🔥【2026 AUTEL FLAGSHIP MK900BT MK900-BT, NEW MODEL OF MK808S MK900 MX900 MK808BT MX808S】2026 newest Autel MK900BT retains all features of MK808S MX900 MX808S MK808Z MK808Z-BT MK808K-BT, while EXTRA added powerful functions (value 2000+ bucks). The Pro-level Autel MK900BT makes a big leaps: 28+➡40+, 50+➡3000+ Active Tests, 2026 NEW✅CAN FD & DOIP protocols ✅Pre&Post diagnostic report ✅WIFI Print ✅Auto VIN&Auto Scan 2.0 ✅Scan VIN/ License ✅Battery Test (Need purcha.se BT506). If found defect or us.ed, please conta-ct 📞autelsupply @outlook. com📞 get perf-ect solut.ion.
- 🚗【3000+ ACTIVE TESTS (50➡3000+), SAME AS MS906 PRO】Differ from MS906BT MS906 MP808 MK808 MX808 MK808BT only 50 tests, Autel scanner MK900BT escaner automotriz professional offers 3000+ active tests, it can send command to ECUs & monitor actuators operation, quickly locating faulty components. Bidirectional scanning takes your diagnostics to the next level with menu lists 3000+ active tests, such as windows, rear mirrors, sunroof, wipers, fuel injector, coolant fans, radiator fan, AC clutch, coolant pump and more. Note: Functions are not available for all vehicles, please send vehicle VIN to us check compatibility.
- 🚗【40+ HOT SERVICES FOR 150 MAKES (28+➡40+)】Full level-up of OBD2 code reader MaxiCOM MK808S MK808 MK808Z MX808 MK808Z-BT with 28 service, Autel scan tool MK900BT/ MK900-BT offers 40+ maintenance service on 150+ brands 10,000 vehicles from 1996-2025-2026. Hottest Services like: Oil Reset, ABS Bleed, SAS Calibration, Injector Coding, SRS, Throttle Reset, Gearbox Reset, Battery Registration etc. Added 12+ advanced resets: rain slash light sensor reset, HVA.C/ SUS calibration etc. Welcome to send Vehicle Make>Model>Year>VIN>Functions you required to 📞autelsupply @ outlook . com📞 check compatibility.
- 🚗【OE ALL SYSTEM DIAGNOSE, AUTO SCAN 2.0: SCAN LICENSE/ AUTO VIN】2026 new release Autel MaxiCOM MK900-BT scan tool embodies all system diagnostic with its 8in display for all vehicles. Like Sna.p-on tools, it can perform ✔Read/Clear Codes✔Displays 5-in-1 Live Data✔Record & Playback Data✔Retrieve Info on all available systems like ABS ECM BCM SRS TCM etc. In addition to Auto VIN technology, Autel MK900BT adds Scan License/ Auto Scan 2.0 to identify vehicle’s VIN/ license, make, year, model, no need manual input; One-click WiFi Printing of Pre&Post comparison diagnostic reports, highlight root causes of problems.
- 【TURN OFF CEL】 This AL319 car scanner diagnostic tool supports Reading and Clearing DTCs, DTC Look Up, displaying Live Data, Freeze Frame & I/M Readiness, view vehicle information, etc., to figure out the root cause of the Check Engine Light (CEL) and turn it off, helping you catch any potential issues early and avoid excessive costs from unnecessary repairs.
- 【EXTENSIVE APPLICATION】 Autel AL319 Compatible with 7 languages (English, French, Spanish, etc.) and various post-1996 OBD II protocol vehicles (Toyota
, Nissan, Honda, Ford, etc.), this OBD II scanner provides accurate and fast diagnosis for worldwide car owners. - 【FOR END USER & DIYERS】 This error code reader AL319 is “plug and play” and comes with an easy interface. Even if you’re not familiar with vehicle repair, you can quickly take control of this obd2 scanner, and get the information you want.
- 【USER-FRIENDLY DESIGN】 This OBD2 scanner and check engine code reader features a patented One-Click I/M Readiness, TFT color display, built-in speaker, LED Indicator etc. The cable is long enough without being too long and getting in the way. No batteries are needed.
- 【HIGH-QUALITY SERVICES】 12 months war.ranty from the date of purchase and lifetime free update are offered by this Automobile OBDII scan tool. Welcome to contact us via Q&A, email, or hotline, and our after-sale-service team for technical support.
This product presentation was made with AAWP plugin.
Last update on 2026-05-11 / Affiliate links / Images from Amazon Product Advertising API