2025 Hyundai Ioniq 5 N EBD System Software Update

Hyundai has released Service Campaign 9B7 to update the software in the Integrated Electronic Booster (IEB) for certain 2025 Hyundai Ioniq 5 N vehicles. This update specifically targets an issue where the IEB software logic could disable the Electronic Brake Force Distribution (EBD) system under specific malfunction conditions, impacting the Hyundai Ioniq 5 EBD system's proper function.

This service campaign, identified as TSB 24-01-064H, is crucial for ensuring the proper operation of the braking system and correct warning lamp indications. Owners of affected vehicles should have this software update performed at an authorized Hyundai dealer.

Symptoms

Owners of affected 2025 Hyundai Ioniq 5 N vehicles may observe an incorrect warning lamp illuminated in the instrument cluster. Specifically, if a malfunction occurs with the steering angle sensor, yaw sensor, or lateral acceleration sensor, the vehicle's system may erroneously illuminate the "ESC warning lamp". This is contrary to the intended design, which should instead display the "ABS and BRAKE warning lamps" to accurately signal an issue related to the Hyundai Ioniq 5 EBD system.

Diagnosis / Trigger Conditions

The underlying issue with the Hyundai Ioniq 5 EBD system stems from the Integrated Electronic Booster (IEB) software logic. This logic can incorrectly disable the Electronic Brake Force Distribution (EBD) system when specific sensor malfunctions are detected. The trigger conditions involve faults with the steering angle sensor, yaw sensor, or lateral acceleration sensor, leading to the display of the "ESC warning lamp" instead of the appropriate ABS and BRAKE warning lamps.

Repair Procedure Summary

The authorized repair for Service Campaign 9B7 involves updating the Integrated Electronic Booster (IEB) software. This procedure, detailed in Technical Service Bulletin (TSB) 24-01-064H, modifies the IEB logic to ensure the Electronic Brake Force Distribution (EBD) system operates correctly even when sensor malfunctions occur. The updated software will also ensure that the correct "ABS and BRAKE warning lamps" are illuminated in the event of a malfunction, providing accurate information to the driver.

Technicians will use Hyundai's GDS information system, selecting "ABSESC | Brake" for the system selection. The update is identified by ROM ID Information "Event #1114 - NE N IMPROVEMENT OF EBD NON-OPERATION ISSUES DUE TO NE N IEB S/W ERRORS". This service must be performed by a technician certified at "Hyundai Expert" level or higher, who has completed the required "Hyundai Learning Portal (HLP) IEB Online Training". Furthermore, to prevent potential damage, this repair is exclusively to be performed by "IONIQ Certified Dealers". After the software update, technicians are required to take a picture of the 'ECU Complete Screen' showing '100% Success' as part of the warranty claim process.

Warranty Information

This software update, performed under Service Campaign 9B7 and TSB 24-01-064H, is covered under warranty.

• Labor: The repair requires 0.3 hours (0.3 M/H) for updating the IEB software.
• Parts: No new parts are required for this software update.
• Documentation: The labor time includes the requirement for the technician to take a picture of the 'ECU Complete Screen' showing '100% Success' to validate the completion of the update for warranty claims.

Important Warnings

• All affected 2025 Hyundai Ioniq 5 N vehicles must be updated with the latest software version.
• The software update takes less than 30 minutes to complete. Dealers are advised to set appropriate expectations with customers regarding completion time.
• This service campaign requires IONIQ Certified Dealers to perform the repair to avoid potential damage to IONIQ vehicles.

Owner Action

If you own a 2025 Hyundai Ioniq 5 N, you will receive a notification via First Class Mail in September 2024 regarding Service Campaign 9B7. It is strongly recommended to contact your authorized "IONIQ Certified Dealer" to schedule the IEB software update. This repair will be performed free of charge to the owner. The software update typically takes less than 30 minutes to complete, and dealers are prepared to offer alternative transportation if your vehicle needs to be kept overnight or for an extended period.

NHTSA ID: 11006831