2025 Hyundai Ioniq 5 CCU Update for Plug & Charge

Hyundai Technical Service Bulletin (TSB) 25-BE-009H outlines a critical software update for the Central Communication Unit (CCU) in specific 2025 Hyundai Ioniq 5 (NEA EV) vehicles. This 2025 Hyundai Ioniq 5 CCU update is designed to enable the "Plug & Charge service" feature, enhancing the vehicle's charging capabilities. The update involves two main subsystems within the CCU: the Application Processor (AP) and the Microcontroller Unit (MCU).

This update can be performed either by a certified Hyundai dealer using an Ethernet connection or by the customer via an Over-the-Air (OTA) update if they have an active Bluelink subscription. The TSB emphasizes that both the AP and MCU updates (Event Numbers 1233 and 1234) are mandatory for successful completion and warranty claim submission.

Important Warnings and Owner Advisories

Owners and technicians should be aware of several crucial points regarding this 2025 Hyundai Ioniq 5 CCU update:

• Dealer Certification: "IONIQ repairs can only be performed at IONIQ certified dealers." This ensures specialized knowledge and equipment are used.
• Battery Charge: Before starting the software update, ensure the vehicle's battery charge is "above 11.0 Volts" and the tablet used for the update has a charge "above 30%" to prevent update failures.
• Ignition and Accessories: "Turn OFF all lamps (do NOT leave head lamp switch in auto mode) and all accessories." The update must be performed with the ignition switch in the ON position.
• Connection Integrity: "Do NOT disconnect any cables connected to the vehicle or scan tool during update." Maintaining stable connections is vital.
• Vehicle State: "Do NOT place in Ready mode during update." Also, "Do NOT turn OFF the ignition switch during update."
• Mandatory Updates: Both the AP and MCU subsystems (Event Numbers 1233 and 1234) "MUST be performed" to qualify for warranty claim submission. Claims are "subject to debit if either software (1233 and 1234) is NOT updated successfully."
• Update Failure Recovery: If the update fails, remove the power connector from the indoor fuse box for at least 5 seconds, then reconnect it and retry the update.

Update Events and Identifiers

The 2025 Hyundai Ioniq 5 CCU update involves two distinct software events, both crucial for enabling the "Plug & Charge service":

System	Event Number	Description
CCU	1233	NE1A CCU MARKETABILITY ENHANCEMENT (AP)
CCU	1234	NE1A CCU MARKETABILITY ENHANCEMENT (MCU)

These events update the Application Processor (AP) and Microcontroller Unit (MCU) components of the Central Communication Unit (CCU).

Software Version Information

This TSB updates the software for the CCU, identified by ECU Part Number 91920-P1000. The following table shows the old and new ROM ID software versions for both update events:

Event	Software	Old ROM ID	New ROM ID
1233	AP	1.41.17	1.41.39
1234	MCU	1.41.05	1.41.11

Technicians must verify the current ROM ID version before proceeding with the software update.

Required Tools and References

To perform this 2025 Hyundai Ioniq 5 CCU update, specific diagnostic tools and reference materials are necessary:

• VCI 3 (GOVHNNN06): This tool comes with a 19-pin cable (P/N G1XDDCA020).
• VCI 2 (G1XDDMN001): If using VCI 2, an Ethernet Communication Interface (ECI) Kit (G0XDDMN052) is also required.
• Reference TSBs:
  • TSB 23-GI-006H: For detailed information on configuring Ethernet communication for setup.
  • TSB 24-GI-012H: For information on the "ECU Update Procedure for Tablet-Based GDS-Smart."

Repair Procedure Summary

The update process for the 2025 Hyundai Ioniq 5 CCU update involves several steps, ensuring both AP and MCU subsystems are correctly updated:

1. Initial ECU Update (AP): Perform the first update (Event 1233, CCU AP) in Auto Mode using the GDS system. Verify the ROM ID before updating.
2. ROM ID Check: Select the CCU_CCNF system to scan the vehicle's current ROM ID and compare it to the ROM ID Information table.
3. Ignition Cycle (AP): After the AP update reaches 100% completion, follow the on-screen prompts to cycle the ignition OFF for at least 10 seconds (up to 30 seconds for some models) to reset the control unit. Use the Refresh button to reset the timer if needed.
4. Documentation (AP): Take a screenshot of the "ECU update complete" screen and upload it to STUI (Service Technical Update Information).
5. Second ECU Update (MCU): Perform the second update (Event 1234, CCU MCU) also in Auto Mode. Verify the ROM ID before updating.
6. Ignition Cycle (MCU): Similar to the AP update, cycle the ignition OFF for at least 10 seconds after the MCU update completes.
7. Documentation (MCU): Take a screenshot of the "ECU update complete" screen for the MCU update and upload it to STUI.
8. OTA Initialization: The OTA initialization should ideally perform automatically. If it fails, manually complete it under S/W Management > CCU_CCNF - Central Communication Unit (CCNF > OTA Initialization.
9. Fuse Box Reset (if needed): If an update fails, disconnect the power connector (C) in the indoor fuse box, wait at least 5 seconds, and then reconnect it before retrying.
10. Fault Code Search: Perform an "All Systems Fault Code search" and erase any DTC history that may have incidentally occurred during the ECU update.
11. Final Confirmation: Place the vehicle in "Ready" mode to confirm proper operation.

For manual mode updates, specific passwords are provided: Event 1233 (AP) uses password 1439, and Event 1234 (MCU) uses password 1434.

Warranty Information

Warranty claims for this 2025 Hyundai Ioniq 5 CCU update should be submitted as "Warranty" type on the Claim Entry Screen. The operation code is 91920F03 for a "CCU Update," with an estimated operation time of 0.4 M/H. The causal part is 91920-P1000, with Nature Code W11 and Cause Code ZZ3. If any other part requires replacement during this TSB, and it is under warranty, a separate claim should be submitted. For out-of-warranty parts, a Prior Approval request for goodwill consideration is required.

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Source: NHTSA ID: 11017473