2022 Hyundai Ioniq 5 Cold DC Charging TSB 23-01-017H

Important Warnings for Owners and Dealers

Hyundai has issued Service Campaign T9Q, identified by Technical Service Bulletin (TSB) 23-01-017H, to address cold DC charging performance in certain 2022 Hyundai Ioniq 5 Electric (NE1) All Wheel Drive (AWD/4WD) models. This bulletin revises the previous bulletin 22-01-094H.

Dealers are instructed to perform this Service Campaign on all affected vehicles prior to customer retail delivery. It must also be performed whenever an affected vehicle is in the shop for any maintenance or repair. Owners should be aware that if the vehicle's 12V battery voltage is below 12 volts during an ECU update, a warning will appear. In such cases, the vehicle needs to be run for at least 15 minutes to ensure an adequate battery state of charge, preventing an ECU Update failure.

Symptoms

Owners of affected 2022 Hyundai Ioniq 5 AWD models may experience suboptimal DC charging performance, particularly when the outside temperature is below 68°F (20°C). This is due to the EV battery not being at its optimal temperature for fast charging in cold conditions.

Diagnosis and Trigger Conditions

The Battery Conditioning function is designed to preheat the EV battery before arriving at a DC charger site. Once the necessary software updates are installed, the owner must actively select a DC charger site as a Point of Interest (POI) in the vehicle's navigation system. This action enables the battery conditioning heating when the EV battery temperature is below 68°F. The impact of battery heating on DC charging will vary based on the initial battery temperature and the estimated time to arrive at the POI.

Repair Procedure Summary

The repair involves performing several software updates to enable the Battery Conditioning function and improve Eco mode driving performance. This process includes:

1. BMS (Battery Management System) Software Update: This update is performed in Auto Mode using the GDS system. The relevant GDS Event is 892, described as "NE EV BATTERY CONDITIONING FUNCTION UPGRADED (BMS)". If the update fails in Auto Mode, a manual recovery procedure is available, which may involve cycling the ignition or disconnecting/reconnecting the 12V battery terminals.
2. VCU (Vehicle Control Unit) Software Update: Similar to the BMS update, this is also performed in Auto Mode via GDS. The associated GDS Event is 935, labeled as "NE VCU 4WD IMPROVEMENT". After each ECU upgrade, the ignition key must be cycled to OFF for at least 10 seconds to reset the control unit and prevent system errors.
3. AVN Map Software Update: This update applies specifically to certain earlier 2022 Hyundai Ioniq 5 vehicles produced before October 2021. Owners can check their AVN software version in the EV Settings screen; the target version date is 220602. The update can be downloaded from the Hyundai Update Website (https://update.hyundai.com/US/EN/) using a dedicated updater application.

After all updates are complete, technicians perform an All Systems Fault Code search to erase any incidental DTCs that occurred during the ECU update. The vehicle is then started in Ready mode to confirm proper operation, and the presence of the Battery Conditioning function is verified in the AVN EV settings screen.

Required Tools or Parts

For the AVN Map Software Update, a Type A USB 3.0 thumb drive with a minimum capacity of 64 GB is required. The updater application will automatically format the drive and copy the necessary files.

Software Versions and Codes

This service campaign involves specific software updates and identifiers:

• BMS GDS Event: 892 (NE EV BATTERY CONDITIONING FUNCTION UPGRADED (BMS))
• VCU (4WD) GDS Event: 935 (NE VCU 4WD IMPROVEMENT)
• AVN Software Version: NEEV23.USA.S5W_M.V001.00.220602
• Causal Part Number for Warranty Claims: 39751-1XNN1

Technicians will update various BMS and VCU ROM IDs to their latest versions. For instance, VCU ROM IDs like NE1A-N0-S07-V300, NE1A-NO-SB0-V400, NE1A-NO-SB1-V400, NE1A-NO-SB2-V400, NE1A-N0-SB3-V400, and NE1A-N0-SD2-V400 will be updated to NE1A-NO-SB5-V400.

Owner Action

If you own a 2022 Hyundai Ioniq 5 AWD, your dealer will perform this service campaign free of charge. Once the software updates are applied, you will need to enable the "Battery Conditioning Mode" in your vehicle's AVN EV settings screen. To activate the battery preheating for optimal Hyundai Ioniq 5 cold charging, you must set a DC charger as a Point of Interest (POI) in your navigation system when the ambient temperature is below 68°F (20°C). Be aware that enabling battery conditioning will temporarily use battery power and reduce driving range until charging.

Additional Continuous Improvements

Beyond optimizing Hyundai Ioniq 5 cold charging, the VCU update (GDS Event 935) also includes several other continuous improvements:

• Enhanced Electronic Parking Brake (EPB) auto engagement when shifting into Park and auto disengagement when shifting out of Park while pressing the brake pedal.
• Improved Distance to Empty (DTE) strategy.
• Better snow road surface performance.
• Enhanced air conditioning performance during AC slow charging.
• Improved i-Pedal mode operation.
• Enhanced charging sequence.

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Source: NHTSA ID: 10232202