2022 Hyundai Tucson Drivability and Shift Quality Update

Hyundai has issued Service Campaign T7R, identified by Technical Service Bulletin (TSB) 22-01-006H-2, to address concerns regarding drivability and shift quality in certain 2022 models. This bulletin supersedes the previous TSB 22-01-006H-1 to include the Tucson (NX4) model.

The core of this service campaign involves updating the Engine Control Unit (ECU) and Transmission Control Unit (TCU) software. This Hyundai Tucson drivability update is specifically designed to enhance the vehicle's overall drivability and smooth out shift quality, particularly during acceleration.

Important Warnings

Hyundai has issued a critical advisory for dealers regarding this campaign:

• "*** Dealer Stock Vehicles Only *** Dealers must perform this Service Campaign prior to customer retail delivery."

This means that if you are purchasing a new 2022 Hyundai Santa Fe, Sonata, or Tucson, this update should be completed before you take delivery of the vehicle. For vehicles already in customer hands, dealers are instructed to check for open campaigns via WEBDCS when the vehicle arrives for service.

Symptoms Addressed

Owners of affected vehicles may notice issues related to how their vehicle drives and shifts, especially when accelerating. The software update targets specific conditions to improve the driving experience.

OEM Fault Labels / Event Numbers

This service campaign addresses several internal OEM fault labels related to acceleration logic and shift quality. These are not standard DTCs (Diagnostic Trouble Codes) but rather internal event numbers used by technicians to identify specific software improvements.

Engine (ECU) Related Event Numbers:

Event #	Description
#771	TMa THETA 2.5GDI 8AT ACCELERATION LOGIC IMPROVEMENT (ECU)
#775	NX4a THETA 2.5GDI 8AT ACCELERATION LOGIC IMPROVEMENT (ECU)
#791	NX4 2.5GDI 8AT ACCELERATION DRIVABILITY ENHANCED LOGIC (ECU)
#781	DN8 2.5GDI ISG AND ACCELERATION DRIVABILITY ENHANCED LOGIC (ECU)

Automatic Transmission (TCU) Related Event Numbers:

Event #	Description
#772	TMa THETA 2.5GDI 8AT ROUGH SHIFT AND HESITATION IMPROVED LOGIC (TCU)
#776	NX4a THETA 2.5GDI 8AT ROUGH SHIFT AND HESITATION IMPROVED LOGIC (TCU)
#776	NX4 THETA 2.5GDI 8AT ROUGH SHIFT AND HESITATION IMPROVED LOGIC (TCU)
#782	DN8 2.5GDI ROUGH SHIFT AND HESITATION IMPROVED LOGIC (TCU)

These event numbers correspond to the specific software logic improvements implemented for the ECU and TCU in various models, aiming to resolve the Hyundai Tucson drivability update concerns.

Repair Procedure Summary

The repair involves a software update to both the ECU and TCU using Hyundai's Global Diagnostic System (GDS). The process is as follows:

1. Initial Update: The technician must first attempt the GDS ECU and TCU update in Auto Mode.
2. Recovery Procedure (if Auto Mode fails): If the update begins but then fails in Auto Mode, the technician will disconnect the battery cables, touch them together for one minute, and then reconnect them. After attaching a battery charger, the update will be performed in Manual Mode to recover the process. General instructions for this recovery are detailed in TSB 15-GI-001 (GDS Mobile).
3. Post-Update Check: Once the TCU update is successfully completed, the technician will check for any Diagnostic Trouble Codes (DTCs) and erase them.

This software reprogramming ensures your vehicle receives the latest logic for improved performance.

Required Tools or Parts

The primary tool required for this procedure is the Global Diagnostic System (GDS). The update involves installing new software versions, referred to as ROM IDs, into the ECU and TCU. The bulletin lists extensive tables detailing the old and new Part Numbers and ROM IDs for each affected model and VIN range. For example, a causal part number for the Tucson (NX4a) is 39110-2S161, and for the Santa Fe (TMa) it is 39101-2STN5. The new ROM IDs replace the older software versions to implement the improved logic for the Hyundai Tucson drivability update.

Warranty Information

This service is covered under Hyundai's warranty. The operation code for the ECU + TCU UPGRADE is 10D221R1 for Tucson (NX4a), 10D221R2 for Santa Fe (TMa), 10D221R4 for Sonata (DN8), and 10D221R5 for Tucson (NX4). The estimated operation time is 0.5 hours. Specific causal part numbers are also provided for warranty claims, such as 39110-2S161 for Tucson (NX4a) and 39101-2STN5 for Santa Fe (TMa).

Owner Action

If you own a 2022 Hyundai Santa Fe, Sonata, or Tucson and experience drivability or shift quality concerns, or if you simply want to ensure your vehicle has the latest software, contact your authorized Hyundai dealer. They can check if your vehicle is part of Service Campaign T7R (TSB 22-01-006H-2) and perform the necessary ECU and TCU software update free of charge under warranty.

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Source: NHTSA ID: 10208860