2025 Hyundai Tucson DCU Software Error Service Campaign

Hyundai Motor America (HMA) has re-launched several service campaigns—TDF, TDFA, and TDFB—to address a specific Data Communication Unit (DCU) software error affecting certain 2025 Hyundai Tucson models. This proactive measure ensures the continued functionality of telematics services for owners. This update also includes additional information regarding VCI 2 connection and IP settings for technicians performing the software update.

Why This Matters: Potential Telematics Service Shutdown

The primary concern addressed by these campaigns is a potential shutdown of telematics services after one year of vehicle operation. This critical issue stems from a software error within the Data Communication Unit (DCU) module. If left unaddressed, owners could lose access to important features provided by their vehicle's telematics system.

The Root Cause: Data Communication Unit (DCU) Software Error

The underlying problem is a Data Communication Unit (DCU) software error. This error occurs because the internal timer initialization logic within the DCU module was not correctly implemented. This flaw can cause the DCU module to malfunction, eventually leading to the shutdown of telematics services after approximately one year of use. Addressing this Hyundai Tucson DCU software error is crucial for maintaining full vehicle functionality.

Repair Procedure Summary

The resolution for this issue involves a software update for the DCU module. Hyundai has issued Technical Service Bulletins (TSBs) 25-01-057H-1, 25-01-059H-1, and 25-01-060H-1, which provide detailed instructions for dealerships to perform this update. These TSBs ensure that the software is correctly installed, preventing the telematics services from shutting down. Technicians will need to follow specific guidelines regarding VCI 2 connection and IP settings before performing the update.

Over-the-Air (OTA) Update Option

For added convenience, this software update can also be conducted via an Over-the-Air (OTA) process. Customers with an active subscription to Hyundai Bluelink can complete the update themselves. This means that a visit to the dealership is not required for these owners, offering a flexible solution to resolve the Hyundai Tucson DCU software error.

Important Information for Owners

Owners should confirm their vehicle's VIN eligibility for the campaign through WebDCS. If your vehicle is affected, you can choose to have the software update performed at a Hyundai dealership or, if you have an active Hyundai Bluelink subscription, you can perform the update yourself via OTA. Hyundai Motor America appreciates the continued partnership and commitment of its customers in addressing this important software update.

NHTSA ID: 11025595