2022-2023 Hyundai Ioniq 5 VCU Software Update

Hyundai has issued Service Campaign 23-01-039H, a Technical Service Bulletin (TSB) aimed at enhancing the performance of 2022-2023 Hyundai Ioniq 5 Electric vehicles. This campaign involves a Vehicle Control Unit (VCU) software update designed to implement several continuous improvements across key vehicle systems. Owners of these vehicles should be aware of this important update to ensure their vehicle operates with the latest enhancements.

This essential update, referred to as the NE VCU IMPROVEMENT (Event 935) in the GDS system, addresses multiple aspects of the vehicle's operation. The Hyundai Ioniq 5 VCU update is performed free of charge at certified Hyundai dealers.

What the Update Addresses

The VCU software update introduces several continuous improvements to the Hyundai Ioniq 5 Electric. These enhancements are designed to optimize the vehicle's driving dynamics, safety features, and overall user experience:

• i-Pedal Mode Operation: Improves the functionality and responsiveness of the i-Pedal mode.
• Electronic Parking Brake (EPB): Enhances the automatic engagement of the EPB when shifting into Park and its automatic disengagement when shifting out of Park (to Drive or Reverse) while the brake pedal is engaged.
• Distance to Empty (DTE) Strategy: Refines the accuracy and calculation of the Distance to Empty display.
• Snow Road Surface Performance: Optimizes vehicle performance and stability when driving on snowy conditions.
• Air Conditioning Performance: Improves air conditioning efficiency during AC slow charging.
• Charging Sequence: Enhances the overall charging sequence for better reliability and efficiency.

For 2022 model year (2022MY) Hyundai Ioniq 5 owners, an Owner's Manual Supplement (EPB) leaflet (part number PGIOE-U32AQQH) is provided to explain the changes related to the Electronic Parking Brake system. This information is already integrated into the owner's manuals for 2023MY vehicles.

Important Warnings for Owners

Owners should be aware of specific conditions and requirements related to this service campaign:

• "This service campaign can only be performed at certified IONIQ 5 Hyundai dealers."
• "This VCU Update is long, so the 12V battery must be at good charge level (>60% SOC)." If the 12V battery voltage is low, the update may fail.
• "If the voltage is below 12 volts as per the GDS warning, then select Back and run the vehicle at least 30 minutes to reach an adequate battery state of charge to prevent an ECU Update failure. Cycle the ignition OFF/ON before retrying ECU update again."
• "If the VCU Update Event 935 does not appear, shows as “not applicable” or “already completed”, then the VCU Update cannot be performed." In such cases, the dealer will select the appropriate opcode 20D123R3.

Repair Process Overview

Certified Hyundai dealers will perform the VCU software update (Campaign 23-01-039H) by following a detailed procedure:

1. Vehicle Preparation: For 2022MY vehicles, the Owner's Manual Supplement (PGIOE-U32AQQH) will be attached to the Repair Order and provided to the customer with an explanation of its contents.
2. VCU Update: The technician will perform the VCU update in Auto Mode, verifying the VCU ROM ID before proceeding. The update corresponds to Event 935 in the GDS system.
3. Battery Voltage Check: A critical step is to ensure the 12V battery is at a good charge level (above 60% SOC) before starting the update, as the process is lengthy. If a "Warning! lower Battery Voltage. BATTERY VOLTAGE: 10.8" message appears, the battery must be recharged.
4. Troubleshooting Update Failures: If the update fails in Auto Mode, the technician will attempt recovery in Manual Mode. In persistent failure scenarios, disconnecting the 12V battery cables and performing a cap discharge may be necessary.
5. Post-Update Procedure: After the update completes, the ignition key must be cycled to OFF for at least 10 seconds to reset the control unit.
6. Fault Code Clearance: An All Systems Fault Code search will be performed, and any incidental DTCs that occurred during the ECU update will be erased.
7. Final Verification: The vehicle will be started in "Ready mode" to confirm proper operation after the Hyundai Ioniq 5 VCU update.

Required Parts and Software

The primary part involved in this campaign is the OWNER'S MANUAL SUPPLEMENT (EPB), with part number PGIOE-U32AQQH, specifically for 2022MY vehicles. The VCU software update itself involves updating the Vehicle Control Unit (VCU) with new ROM IDs. For VCU P/No. 39751-1XNN1, the new ROM ID is NE1A-NO-SB5-V400. For VCU P/No. 39751-1XNN4, the new ROM ID is NE1A-N0-KB5-V200. The GDS system event number for this improvement is 935.

Warranty Information

This service campaign is to be submitted as a "Campaign" type claim. The operation codes (Op Codes) for this service are:

• 20D123R1: VCU UPDATE WITH LEAFLET (for 22MY Ioniq 5 Electric)
• 20D123R0: VCU UPDATE (NO LEAFLET) (for 23MY Ioniq 5 Electric)
• 20D123R3: INSPECTION ONLY (for 22-23MY Ioniq 5 Electric, if update is not applicable)

Source: NHTSA ID 10238394