2025 Hyundai Tucson DCU Software Update (25-01-060H-1)

Hyundai has issued Service Campaign 25-01-060H-1, a software update for the Data Communication Unit (DCU) in certain 2025 Tucson (NX4M) vehicles. This update addresses a critical software error that could lead to the shutdown of telematics services after one year of operation. The original TSB 25-01-060H is superseded by this bulletin, which includes additional details for VCI 2 connection and IP settings.

Why This Matters

The Data Communication Unit (DCU) is essential for your vehicle's telematics services, which include features like emergency assistance, navigation, and remote services. An internal timer initialization logic error within the DCU software can cause the module to shut down these vital services after approximately one year. This software update ensures the continued functionality and reliability of these systems in your 2025 Hyundai Tucson (NX4M).

What's Being Addressed

This service campaign targets a specific software error within the DCU of 2025 Hyundai Tucson (NX4M) models. The issue stems from the internal timer initialization logic not being properly implemented, which can eventually lead to the DCU module shutting down telematics services. The update, identified by GDS Event Number 1297 as "NX4 OB PE/NX4 PE/NX4 PE HEV/NX4 PHEV/NX4a PE/NX4m PE DCU LOGIC IMPROVEMENT (NA)", provides a necessary software revision to correct this problem.

Important Warnings for Owners and Technicians

Hyundai emphasizes several critical points regarding this update:

• 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.
• Owners will not receive direct notification from Hyundai for this service campaign; technicians must access the “Vehicle Information” screen via WebDCS to identify open campaigns.
• The GDS ECU update must initially be performed in Auto Mode. If the update fails in Auto Mode, technicians should perform it in Manual Mode to recover.
• Before starting the software update, ensure the vehicle's battery charge is above 11.0 Volts and the diagnostic tablet's battery charge is above 30% to prevent update failure.
• During the update, technicians must turn OFF all lamps (and not leave the headlamp switch in auto mode) and all accessories. The update should be performed 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.
• If using VCI 2, technicians must wait for the Wi-Fi Direct timer to complete to ensure connection and do NOT select Bluetooth Only.
• The VIN/Date/Time/Mileage photo imprint is NOT required for GDS screenshots validating the repair.

Required Tools or Parts

Technicians will need specific Service Special Tools (SST) to perform this update:

• VCI 3: Tool Number G0VHNNN06. This comes with the 19-pin cable.
• 19-Pin Cable: Part Number G1XDDCA020 (included with VCI 3).
• VCI 2: Tool Number G1XDDMN001. If using VCI 2, the Ethernet Communication Interface (ECI) Kit is required.
• Ethernet Communication Interface (ECI) Kit: Tool Number G0XDDMN052 (required for VCI 2 software updates).

Repair Procedure Summary

The repair involves updating the DCU software using a diagnostic tool. The general steps are:

1. Digital Documentation: Repair validation photos are required, adhering to the latest Warranty Digital Documentation Policy.
2. ECU Update Setup: Configure the diagnostic tablet's Ethernet communication settings by entering specific IP address (10.0.128.0), DNS address (8.8.8.8), Netmask (255.0.0.0), and Default gateway (10.0.128.0).
3. Perform Update: Initiate the ECU update in Auto Mode. If it fails, switch to Manual Mode. Refer to TSB 25-GI-011H for detailed tablet-based GDS-Smart procedures.
4. Verify ROM ID: Scan the DCU system to check the current ROM ID and compare it against the latest ROM ID (120.NA.012054.012054) for ECU Part Number 96510-N9140.
5. Troubleshooting Update Failure: 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 for at least 5 seconds. Reassemble and retry the update.
6. Ignition Cycle: Once the update is 100% complete, cycle the ignition OFF for 10 to 30 seconds to reset the control unit.
7. OTA Initialization: The Over-the-Air (OTA) initialization should perform automatically. If not, it can be completed manually under S/W Management > CCU_CCNF > OTA Initialization.
8. Final Checks: Take a screenshot of the ECU Update