2025 Hyundai Tucson Fingerprint Module Update

Hyundai has issued Service Campaign 25-01-030H for certain 2025 Hyundai Tucson (NX4A) vehicles equipped with a fingerprint reader. This campaign addresses a software issue within the Fingerprint Module (FPM) that can lead to an error message appearing on the instrument cluster.

This software update aims to resolve the "Check User Authentication" error and restore full functionality to the Fingerprint Module, preventing the associated diagnostic trouble code (DTC) B18CC00 from being stored.

Symptoms

Owners of affected 2025 Hyundai Tucson vehicles may experience the following:

• An error message displayed on the instrument cluster stating: "Check User Authentication".
• Inability to use the Fingerprint Module (FPM) functionality.

Fault Codes / DTCs

The primary diagnostic trouble code (DTC) associated with this issue is:

• B18CC00: IAU Teaching Error (w/FPM)

This DTC indicates a problem with the Fingerprint Module's authentication unit, directly correlating with the "Check User Authentication" message.

Important Warnings for Owners and Technicians

Hyundai emphasizes several critical points regarding this software update:

• Dealers are required to 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.
• The software update is subject to an Over-the-Air (OTA) option and may be completed by customers with active Bluelink subscriptions.
• During the update process, technicians must ensure the vehicle's battery charge is above 11.0 Volts and the tablet's battery charge is above 30% to prevent the update from failing.
• Technicians are instructed to turn OFF all lamps and accessories, and do NOT leave the headlamp switch in auto mode.
• The update must 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 the ECU update fails in Auto Mode, it should be attempted again in Manual Mode.
• If the update fails, technicians must remove the power connector from the in-cabin fuse box or disconnect the negative (-) battery terminal for at least 5 seconds, then reassemble to retry.

Repair Procedure Summary

The repair involves performing a software update for the Fingerprint Module (FPM) using a specialized diagnostic tool. The general steps are as follows:

1. Initial Setup: Connect the diagnostic equipment to the vehicle. This may involve configuring Ethernet communication, referring to TSB 23-GI-006H for detailed instructions.
2. ECU Update in Auto Mode: Begin the ECU update procedure in Auto Mode. Technicians should refer to TSB 24-GI-012H for comprehensive instructions on using the Tablet-Based GDS-Smart system.
3. ROM ID Check: After selecting Auto Mode, verify the control unit's current ROM ID and compare it to the required version (New ROM ID 1.60 for FPM 955C0-N9000).
4. Manual Mode Recovery (if needed): If the update fails in Auto Mode, the procedure can be retried in Manual Mode using a specific password for the FPM system (Event 1245, Password 3692).
5. Post-Update Reset: Once the update is 100% complete, cycle the ignition OFF for at least 10 seconds to reset the control unit.
6. OTA Initialization: The OTA initialization should perform automatically. If it fails, it can be manually initiated through the S/W Management menu under CCU_CCNF > OTA Initialization.
7. Fault Code Erase: Perform an all-systems fault code search and erase any DTC history that may have occurred incidentally during the update process.
8. Power Cycle: Disconnect the power connector from the indoor fuse box or the negative (-) 12V battery terminal for at least 5 seconds, then reconnect.
9. Verification: Start the engine to confirm the proper operation of the vehicle and the Fingerprint Module.

Required Tools or Parts

Technicians will need specific tools to perform this software update:

• VCI 3 (Tool Number G0VHNNN06): This tool comes with the 19-Pin Cable (P/N G1XDDCA020).
• 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): Necessary for VCI 2 to complete software updates.

Warranty Information

This software update is covered under Hyundai's warranty. The operation code for this service is 50DA10R0, with an estimated operation time of 0.4 M/H. The causal part for this repair is 955C0-N9000.

For any parts found needing replacement during the campaign, a separate warranty claim should be submitted. If the affected part is out of warranty, a Prior Approval request for goodwill consideration may be necessary.

ROM ID Information

The software update changes the Fingerprint Module (FPM) ROM ID. The relevant information is:

• System: FPM
• ECU Part Number: 955C0-N9000
• Old ROM ID: 1.50
• New ROM ID: 1.60

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Source: NHTSA ID 11018571