2024-2025 Hyundai CCS Disconnection TSB 24-BE-013H

Owners of certain 2024-2025 Hyundai vehicles may encounter a Hyundai CCS disconnection, leading to a loss of connectivity or interruptions in their Connected Car Service (CCS) functions. This issue is detailed in Hyundai Technical Service Bulletin (TSB) 24-BE-013H, issued in September 2024.

The TSB explains that the problem often stems from an occasional disconnection on Verizon's communication network. To address this, Hyundai has outlined a specific procedure to reset the Connected Car Data Communication Unit (DCU) in Dealer Mode, which aims to restore stable connectivity for affected vehicles and resolve the Hyundai CCS disconnection.

Symptoms

Owners may notice a Hyundai CCS disconnection through various indicators. These include a general loss of connectivity for Connected Car Service functions or intermittent interruptions while using these services. The vehicle's infotainment system may display messages or behave as if it has no network connection.

Diagnosis and Trigger Conditions

The root cause for the Hyundai CCS disconnection is identified as an occasional disconnection on Verizon's communication network. This network issue affects the vehicle's Data Communication Unit (DCU), leading to the observed connectivity problems. The TSB does not specify any particular driving conditions or environmental factors that trigger the disconnection, suggesting it can occur at any time.

Important Warnings for Owners

Owners of IONIQ vehicles, specifically the 2025MY IONIQ 5 N (NE EV N), should be aware of a critical notice: "To avoid any potential damage to IONIQ vehicles, IONIQ repairs can only be performed at IONIQ certified dealers. For IONIQ 5 N (NE EV N) ONLY."

Additionally, while a "Battery Reset" might seem like an alternative to the AVN reset, it should only be used if the customer is fully aware and agrees that all stored information in the head unit could be deleted. This includes radio presets, saved addresses, and paired devices.

Repair Procedure Summary

The repair for the Hyundai CCS disconnection involves performing a software reset of the AVN (DCU) in Dealer Mode. The procedure, outlined in TSB 24-BE-013H, requires several steps to access and execute the reset:

1. The technician first turns on the radio and tunes it to FM mode. The radio does not need to be tuned to a specific station, only to FM mode.
2. They then press and hold the SETUP button until the "Software Info/Update" screen appears.
3. The radio volume is adjusted to "7", followed by pressing the bottom right-hand corner of the screen.
4. The volume is then adjusted to "3", and the bottom right-hand corner is pressed again.
5. Finally, the volume is adjusted to "1", and the bottom right-hand corner is pressed one last time.
6. This sequence brings up a password prompt screen where the technician enters "2400" to access Dealer Mode.
7. Within Dealer Mode, the technician selects "Connected Car Service" and then chooses "Reset Network."
8. A confirmation prompt appears, and "Yes" is selected to proceed with the network reset.

Once the network reset is complete, the head unit will automatically reboot. After the reboot, the technician verifies that Bluelink Service is functioning as intended, confirming the resolution of the Hyundai CCS disconnection.

Warranty Information

This software reset is covered under normal warranty conditions. Dealers should submit claims on the Claim Entry Screen as a "Warranty" type. The operation code for this procedure is 96560Q0A, for an "AVN (DCU) Software Reset," with an estimated operation time of 0.2 man-hours. The causal part is listed as NTF00-00000, with a Nature Code of M45 and a Cause Code of ZZ3.

If any part requires replacement during this TSB procedure and is still under warranty, a separate claim should be submitted using the same repair order. For out-of-warranty parts, a Prior Approval request for goodwill consideration is required before performing the work.

Owner Action

If you are experiencing a Hyundai CCS disconnection or issues with your Connected Car Service, it is recommended to schedule an appointment with your authorized Hyundai dealer. Inform them about the symptoms you are experiencing. Mentioning Technical Service Bulletin 24-BE-013H may help expedite the diagnostic and repair process.

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Source: NHTSA ID: 11008135