2022 Hyundai Ioniq 5 Cold DC Charging Optimization TSB 23-01-017H-1

Hyundai has issued Technical Service Bulletin (TSB) 23-01-017H-1, also known as Service Campaign T9Q, to optimize the Hyundai Ioniq 5 cold DC charging performance. This bulletin specifically targets 2022 Hyundai Ioniq 5 Electric All-Wheel Drive (AWD/4WD) models. The update introduces a Battery Conditioning function designed to improve DC charging efficiency in colder temperatures.

This TSB revises a previous bulletin, 23-01-017H, by removing the Vehicle Control Unit (VCU) update portion. The VCU update is now handled by Campaign TAF, TSB 23-01-039H, which is also required for full battery conditioning functionality. The Battery Management System (BMS) Update event is revised to event 1000.

Why This Matters

The Battery Conditioning function allows the EV battery to preheat before arriving at a DC charger, especially when the battery temperature is below 68°F (20°C). This preheating helps to optimize the DC charging performance and can shorten charging times in cold weather. Once the software is updated, owners will need to select a DC charger site as a Point of Interest (POI) in the vehicle's navigation system to activate the battery conditioning heating.

It's important to note that enabling battery conditioning will temporarily use battery power and reduce the driving range until charging begins. If possible, enabling this function for a longer period before departure can help achieve better battery heating at very low temperatures. The dashboard will display "Battery conditioning activated for optimal DC charging" when active.

Important Warnings for Owners

• Dealer Action Required: 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.
• Certified Dealers Only: This service campaign can only be performed at certified IONIQ 5 Hyundai dealers.
• Prerequisite Update: Battery Conditioning also requires performing Campaign TAF TSB 23-01-039H to include the VCU software Update.
• Documentation for Claims: All claims submitted that have incomplete, illegible, or missing documentation are subject to debit.
• Low Battery Voltage Warning: If the vehicle's battery voltage is below 12 volts, a warning message "Warning! lower Battery Voltage. BATTERY VOLTAGE: 10.8" may appear. The vehicle must be run for at least 15 minutes to ensure an adequate battery state of charge to prevent an ECU Update failure. The ignition must be cycled OFF/ON before retrying the ECU update.

Repair Procedure Summary

The service procedure involves several steps to ensure the Hyundai Ioniq 5 cold DC charging optimization is correctly applied:

1. Initial Check: Technicians first check the AVN EV settings screen to see if the Battery Conditioning function is already present. If it is, the vehicle only requires an inspection, and opcode IONIQCHI is claimed.
2. BMS Software Update: The Battery Management System (BMS) software is updated in Auto Mode. This involves verifying the BMS ROM ID (e.g., from old 5300, 5400 to new 5500 for part number 375A0-GI150) and performing the update for Event 1000, described as "NE EV BMS IMPROVEMENT". If the update fails in Auto Mode, manual recovery steps are required, including cycling the ignition and potentially performing a cap discharge after disconnecting the 12V battery terminals.
3. Fault Code Erase: After the ECU upgrade, an All Systems Fault Code search is performed, and any incidentally occurred Diagnostic Trouble Codes (DTCs) are erased.
4. AVN Map Software Update: For certain IONIQ 5 vehicles with software versions older than October 2021 (211001), an AVN Map Software Update is required. This update ensures the Software Version reads 220602 (YYMMDD) or newer. This update can be downloaded from the Hyundai Update Website (https://update.hyundai.com/US/EN/) using a minimum 64GB Type A USB 3.0 thumb drive.
5. Function Confirmation: Finally, the technician confirms that the Battery Conditioning function is present in the AVN EV settings screen and documents this with a photo for warranty claims.

Required Parts and Software

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. The BMS update targets specific ROM IDs, such as 5500, 5508, and 550C, replacing older versions. The causal part number for warranty claims is 39751-1XNN1.

Warranty Information

Claims for this service campaign must be submitted on the Claim Entry Screen as “Campaign” type. The following operation codes and times apply:

• IONIQCHI: Inspection Only for Battery Conditioning (0.3 M/H)
• IONIQCHB: Battery Conditioning Update (0.4 M/H)
• IONIQCHC: Battery Conditioning Update with AVN Map Update (0.8 M/H)

The causal part number for all operations is 39751-1XNN1, with Nature D21 and Cause ZZ6. Op times include VIN, mileage, and photo capture of the "ECU Update Complete" screen and confirmation of the Battery Conditioning function. If a replacement part is needed and is under warranty, a separate claim should be submitted. For out-of-warranty parts, a Prior Approval request for goodwill consideration is required.

NHTSA ID Number: 10243452