What is the purpose of the Hyundai Ioniq VCU update?

The Hyundai Ioniq VCU update, covered by Service Campaign 23-01-067H-1, enhances various vehicle functions including regenerative braking logic, i-Pedal mode operation, and the 12V battery saver logic, which now allows charging from the EV battery even when its SOC is as low as 10% when parked.

Which Hyundai Ioniq models are affected by this VCU software update?

This VCU software update applies to certain 2022-2023 Hyundai Ioniq 5 (NE1) Electric vehicles and 2023 Hyundai Ioniq 6 (CE1) Electric vehicles.

What should I do if my 12V battery is low during the VCU update?

If the GDS system displays a "Warning! lower Battery Voltage" message during the VCU update, indicating the voltage is below 12 volts, the technician must stop the update, run the vehicle for at least 30 minutes to charge the battery, and then cycle the ignition OFF/ON before attempting the update again.

Will I receive an updated owner's manual with this campaign?

Only 2022MY Ioniq 5 vehicle customers will receive an Owner's Manual Supplement leaflet (Part Number PGIOE-U32A-QQH) explaining changes to the Electronic Parking Brake (EPB) system. 2023MY Ioniq 5 and all Ioniq 6 vehicles do not require this supplement.

Hyundai Ioniq 5 & 6 VCU Software Update (TSB 23-01-067H-1)

Hyundai has released Service Campaign 23-01-067H-1, an important technical service bulletin (TSB) that provides a Vehicle Control Unit (VCU) software update for certain 2022-2023 Ioniq 5 and 2023 Ioniq 6 models. This update enhances various vehicle functionalities, including regenerative braking and battery management. This TSB supersedes the previous bulletin, TSB 23-01-067H, to specifically include 2023-2024MY Ioniq 6 (CE1) vehicles.

This Hyundai Ioniq VCU update aims to improve the overall driving experience and efficiency of these electric vehicles. Owners should be aware of this campaign to ensure their vehicles receive the necessary software enhancements.

Important Warnings and Owner Information

Hyundai emphasizes several critical points for this service campaign:

Dealers are required to perform this Service Campaign on all affected vehicles before customer retail delivery. It must also be performed whenever an affected vehicle is in the shop for any maintenance or repair.
This service campaign can only be performed at IONIQ certified dealers.
For in-stock vehicles, technicians must "Turn OFF Shipping Mode to prevent vehicle automatic shutdown" during the update, as this could lead to an update failure.
The VCU update process is lengthy, so the 12V battery must have a good charge level (above 60% State of Charge, SOC). If the GDS warning indicates "Warning! lower Battery Voltage" (below 12 volts), technicians must select "Back" and run the vehicle for at least 30 minutes to ensure adequate battery charge before retrying the ECU update. The ignition must be cycled OFF/ON before retrying.

Symptoms and Improvements from the VCU Update

This updated Vehicle Control Unit (VCU) software package introduces several key improvements:

Brake light logic update for regenerative braking: Enhances the operation of brake lights during regenerative braking.
i-Pedal mode operation logic update: Refines the logic for i-Pedal mode, which allows for single-pedal driving.
12V battery saver logic update allows charging from EV Battery as low as 10% SOC when parked: Improves the 12V battery's ability to charge from the main EV battery, even when the EV battery's state of charge is as low as 10% while parked.

For Ioniq 5 vehicles, this update also incorporates features that were already present in Ioniq 6 models from their start of production:

EPB (Electronic Parking Brake) auto engagement: Automatic engagement of the Electronic Parking Brake when shifting into Park, and auto disengagement when shifting out of Park (D or R) with the brake pedal engaged.
DTE (Distance to Empty) strategy: Improved calculation and display of the estimated driving range.
Snow road surface performance: Enhancements for vehicle performance on snowy road surfaces.
Air conditioning performance during AC slow charging: Optimized air conditioning operation during slow AC charging.
Enhance charging sequence: Improvements to the overall charging process.

An Owner's Manual Supplement leaflet (Part Number PGIOE-U32A-QQH) is provided for 2022MY Ioniq 5 vehicle customers to explain the changes to the Electronic Parking Brake (EPB) system. Owners of 2023MY Ioniq 5 (NE1) vehicles do not need this supplement as their manuals already include the EPB content. Ioniq 6 (CE1) vehicles also do not require a supplement.

GDS Information for Technicians

For technicians performing the Hyundai Ioniq VCU update, the following GDS (Global Diagnostic System) event numbers are relevant:

System	Event #	Description
VCU	1011*	NE VCU IMPROVEMENT #2
VCU	1014*	CE VCU IMPROVEMENT

*Technicians should select the latest available Event # displayed in GDS.

Required Parts

Only one specific part is mentioned for this service campaign:

Owner's Manual Supplement (EPB): Part Number PGIOE-U32A-QQH. This is to be used exclusively for 2022MY Ioniq 5 vehicles.

VCU ROM ID Table

This table details the Vehicle Control Unit (VCU) ROM IDs before and after the update:

Vehicle	System	MY	VCU P/No.	Old ROM ID	New ROM ID
IONIQ 5 ELECTRIC (NE1)	VCU	22-23MY	39751-1XNN1	NE1A-N0-S07-V300, NE1A-N0-SB0-V400, NE1A-N0-SB1-V400, NE1A-N0-SD2-V400, NE1A-N0-SB2-V400, NE1A-N0-SB3-V400, NE1A-N0-SB5-V400	NE1A-N0-SB6-V400
IONIQ 5 ELECTRIC (NE1)	VCU	22-23MY	39751-1XNN4	NE1A-N2-S17-V300, NE1A-N0-KB0-V200, NE1A-N0-KB1-V200, NE1A-N0-KD2-V200, NE1A-N0-KB2-V200, NE1A-N0-KB3-V200, NE1A-N0-KB5-V200	NE1A-N0-KB6-V200
IONIQ 6 ELECTRIC (CE1)	VCU	23-24MY	39751-1XEN1	397511XEN1_NS00	397511XEN1_NS01
IONIQ 6 ELECTRIC (CE1)	VCU	23-24MY	39751-1XEN2	397511XEN2_NK00	397511XEN2_NK01

Manual Mode Passwords

In cases where the GDS ECU update fails in Auto Mode, technicians may need to use Manual Mode. The following passwords are provided:

Menu	Password
NE1 VCU 39751-1XNN1	7304
NE1 VCU 39751-1XNN4	2222
CE1 VCU 39751-1XEN1	6154
CE1 VCU 39751-1XEN2	6142

Repair Procedure Summary

The service procedure for this Hyundai Ioniq VCU update involves several steps, primarily focused on software installation and verification:

Owner's Manual Supplement (2022MY Ioniq 5 only): For 2022MY Ioniq 5 vehicles, attach the Owner's Manual Supplement (EPB) leaflet to the Repair Order and ensure the Service Advisor explains it to the customer.
Perform VCU Update: The VCU update is performed in Auto Mode using the GDS system. Technicians must verify the VCU ROM ID before starting the update.
Post-Update Reset: After the ECU Upgrade process shows 100% completion, the ignition key must be cycled to OFF for at least 10 seconds to reset the control unit.
Screenshot and Upload: A screenshot of the ECU Update complete screen must be taken and uploaded to STUI.
Fault Code Search and Erase: Perform an All Systems Fault Code search and erase any historical DTCs that may have incidentally occurred during the ECU update process.
Vehicle Operation Check: Start the vehicle in Ready mode to confirm proper operation.

Owner Action

If you own a 2022-2023 Hyundai Ioniq 5 or a 2023 Hyundai Ioniq 6, it is recommended to contact an IONIQ certified Hyundai dealer. You can access the "Vehicle Information" screen via WEBDCS to identify open campaigns for your specific vehicle. This ensures your vehicle receives the latest VCU software, improving its performance and safety features as outlined in Service Campaign 23-01-067H-1.

NHTSA ID: 10244986