2022-2023 Hyundai Ioniq 5 VCU Software Update

Hyundai has issued Technical Service Bulletin (TSB) 23-01-067H, also known as Campaign 9A1, to address several functional enhancements for the 2022-2023 Ioniq 5 Electric (NE1) models. This bulletin outlines a mandatory Vehicle Control Unit (VCU) software update designed to optimize various vehicle systems.

This Hyundai Ioniq 5 VCU update is crucial for ensuring your vehicle operates with the latest performance and safety improvements. Dealers are required to perform this service campaign on all affected vehicles before customer retail delivery and whenever an affected vehicle is brought in for maintenance or repair.

Important Warnings and What Owners Should Know

Owners of affected 2022-2023 Hyundai Ioniq 5 vehicles should be aware of several key points regarding this service campaign:

• Mandatory Update: Dealers must perform this Service Campaign on all affected vehicles prior to customer retail delivery and whenever an affected vehicle is in the shop for any maintenance or repair. This ensures all Ioniq 5 vehicles receive the necessary enhancements.
• Certified Dealers Only: This service campaign can only be performed at IONIQ certified dealers. Owners should ensure they visit an authorized service center.
• Battery Voltage Requirement: The VCU update process is lengthy. The 12V battery must maintain a good charge level (greater than 60% State of Charge, SOC) throughout the update. If the GDS system displays a "Warning! lower Battery Voltage." message indicating the voltage is below 12 volts, the vehicle must be run for at least 30 minutes to achieve an adequate battery state of charge. The ignition must be cycled OFF/ON before attempting the ECU update again to prevent failure.

Symptoms and Improvements

This updated Vehicle Control Unit (VCU) software package, identified as NE VCU IMPROVEMENT #2 in the GDS system (Event #1011*), introduces several enhancements:

• Brake Light Logic: An update to the brake light logic for regenerative braking. This ensures proper brake light illumination during regenerative braking events.
• i-Pedal Mode: Enhanced operation of the i-Pedal mode, which allows for single-pedal driving.
• Electronic Parking Brake (EPB): Improved auto engagement of the EPB when shifting into Park, and auto disengagement when shifting out of Park to Drive or Reverse while the brake pedal is engaged.
• Distance to Empty (DTE): Refined DTE strategy for more accurate range estimation.
• Snow Road Performance: Improved performance on snow-covered road surfaces.
• AC Slow Charging: Better air conditioning performance during AC slow charging.
• Charging Sequence: Enhanced overall charging sequence for efficiency and reliability.

For 2022MY vehicle customers, an "Owner's Manual Supplement" leaflet (Part Number PGIOE-U32AQQH) will be provided to explain the changes to the Electronic Parking Brake (EPB) system. The 2023MY vehicle Owner's Manual already includes this content.

Repair Procedure Summary

The service procedure for this Hyundai Ioniq 5 VCU update (TSB 23-01-067H) involves updating the VCU software and, for 2022MY vehicles, providing an owner's manual supplement. The process is as follows:

1. Owner's Manual Supplement (2022MY only): For 2022MY vehicles, the Owner's Manual Supplement (EPB) leaflet (Part Number PGIOE-U32AQQH) must be attached to the Repair Order, and the Service Advisor must explain its contents to the customer.
2. VCU Software Update: The VCU update is performed in Auto Mode using the GDS system. Technicians must verify the VCU ROM ID before proceeding with the software update.
3. Battery Pre-check: Before starting the update, ensure the 12V battery is charged above 60% SOC. If the GDS displays a