2022-2023 Hyundai Ioniq 5 ECO Mode Drivability TSB

Symptoms

Owners of 2022-2023 Hyundai Ioniq 5 All-Wheel Drive (AWD) vehicles may experience drivability concerns specifically when operating the vehicle in ECO Mode. This issue is related to the Vehicle Control Unit (VCU) software.

This Technical Service Bulletin (TSB) aims to resolve these Hyundai Ioniq 5 ECO Mode drivability issues through a software improvement.

Important Warnings

Before proceeding with the VCU software update, it's crucial to note specific conditions related to Service Campaign T9Q. If Service Campaign T9Q has not been performed on your vehicle, TSB 23-EV-002H is not applicable.

If Campaign T9Q is open against your VIN, repairs must first be completed under TSB 23-01-017H, as it addresses the same issue. If T9Q has been previously performed and ECO Mode drivability is still verified, or if T9Q is not applicable and drivability issues persist, then this TSB can be applied.

During the GDS ECU update process, a warning message may appear: "Warning! lower Battery Voltage. BATTERY VOLTAGE: 10.8". If the battery voltage is below 12 volts, the vehicle must be run for at least 15 minutes to ensure an adequate battery state of charge before retrying the ECU update. The ignition should be cycled OFF/ON before attempting the update again.

Repair Procedure Summary

This Technical Service Bulletin (TSB 23-EV-002H) outlines a software update procedure for the Vehicle Control Unit (VCU) to enhance drivability in ECO Mode for affected Hyundai Ioniq 5 AWD vehicles. The update is performed using the GDS system.

The update should primarily be executed in "Auto Mode." If the ECU update initiates but subsequently fails in Auto Mode, technicians are instructed to attempt recovery by performing the update in "Manual Mode." If recovery is still unsuccessful, the 12V battery cables should be disconnected, followed by a cap discharge, before re-attempting the update in Auto Mode.

After the VCU software upgrade reaches 100% completion, the ignition key must be turned to the OFF position for a minimum of 10 seconds to reset the control unit. Finally, an All Systems Fault Code search should be conducted to identify and erase any Diagnostic Trouble Codes (DTCs) that may have incidentally occurred during the ECU update. The vehicle is then started in "Ready" mode to confirm proper operation.

Software Version Details

This TSB provides specific ROM ID information for identifying the correct VCU software versions and corresponding manual mode passwords.

ROM ID Table

VCU P/No.	Model Year	Old ROM IDs	New ROM ID
39751-1XNN1	2022-2023MY	NE1A-N0-S07-V300, NE1A-N0-SB0-V400, NE1A-N0-SB1-V400, NE1A-N0-SB2-V400, NE1A-N0-SB3-V400, NE1A-N0-SD2-V400	NE1A-NO-SB5-V400
39751-1XNN4	23MY	NE1A-N0-KB0-V200, NE1A-N0-KB1-V200, NE1A-N0-KB2-V200, NE1A-N0-KB3-V200, NE1A-N0-KD2-V200, NE1A-N2-S17-V300	NE1A-NO-KB5-V200

Manual Mode Passwords

Menu	Password
NE1 VCU 4WD 39751-1XNN1	1054
NE1 VCU 4WD 39751-1XNN4	1052

Additional Continuous Improvements

The VCU software update provided by TSB 23-EV-002H also includes several other continuous improvements for the Hyundai Ioniq 5 AWD. These enhancements cover various aspects of vehicle operation and performance.

Improvements include enhanced battery conditioning, improved Electronic Parking Brake (EPB) auto engagement and disengagement, a refined Distance to Empty (DTE) strategy, better snow road surface performance, optimized air conditioning performance during AC slow charging, enhanced i-Pedal mode operation, and an improved charging sequence.

Owner Action

If you own a 2022-2023 Hyundai Ioniq 5 AWD and are experiencing Hyundai Ioniq 5 ECO Mode drivability concerns, you should contact your authorized Hyundai dealer to schedule a service appointment. The VCU software update, identified by TSB 23-EV-002H, is typically performed under warranty.

It is important to ensure that Service Campaign T9Q, if applicable to your vehicle's VIN, has been addressed. If T9Q is still open, the dealer will first perform repairs under TSB 23-01-017H, which may resolve the issue.

NHTSA ID: 10232201