2022 Hyundai Tucson Lane Keep Assist Software Update

Hyundai has released a software update, identified as Service Campaign T7X and TSB 22-01-021H, to address concerns with the Lane Keep Assist (LKA) system in certain 2022 Hyundai Tucson models. This update aims to improve the functionality of the Hyundai Tucson Lane Keep Assist system by reducing the sensitivity of its warnings and enhancing its ability to recognize lanes, particularly when the vehicle is entering an interstate.

This bulletin, 22-01-021H, provides crucial information for technicians to perform the necessary software revision. The update specifically targets the logic of the LKA system to prevent instances of "misrecognition of missing lanes" and overly sensitive warnings.

Important Warnings

This service campaign is designated as "Dealer Stock ONLY." This means that dealers are required to perform this software update on all affected vehicles before they are delivered to customers for retail sale. Owners will not receive a notification letter for this update, as it is intended for vehicles in dealer inventory.

Symptoms

Owners of affected 2022 Hyundai Tucson vehicles may notice the Hyundai Tucson Lane Keep Assist system exhibiting:

• Overly sensitive warnings from the LKA system.
• Instances of "misrecognition of missing lanes," especially when driving onto an interstate or similar road conditions.

Diagnosis / Trigger Conditions

To determine if a vehicle requires this update, technicians must check the current software version (ROM ID) of the Lane Keep Assist control unit. This involves accessing the vehicle's "Vehicle Information" screen via WEBDCS and comparing the installed ROM ID to the information provided in the TSB's ROM ID Information Table. The update applies to vehicles with older ROM IDs, such as 99211-N9000 (version 1.03), 99211-N9100 (version 1.00/1.01), 99211-N9200 (version 1.00/1.01), 99211-N9210 (version 1.00), and 99211-N9220 (version 1.00). The target new ROM ID is 99211-N9240 (version 1.00).

If any diagnostic test performed during the update process shows "Failed," technicians are instructed to check for and erase any Diagnostic Trouble Codes (DTCs) in all modules, cycle the ignition and GDS, and attempt a Capacitive Discharge before re-attempting the test.

Repair Procedure Summary

The repair involves updating the Lane Keep Assist (LKA) software using the GDS-Mobile system. The procedure, outlined in TSB 22-01-021H, includes several critical steps and cautions:

1. Preparation: Ensure the vehicle's battery is above 12 volts. If the vehicle has been stored, run the engine to ensure adequate battery charge. Turn off all lamps and accessories (heater, A/C, radio, etc.) to prevent battery discharge during the update. The ignition switch must be in the ON position, and the engine must not be started during the upgrade.
2. GDS-Mobile Connection: Connect the VCI-II interface to the vehicle's DLC connector. Ensure the Tablet PC used for GDS-Mobile is fully charged.
3. Software Update: Access the ECU Upgrade function on GDS-Mobile. Technicians can choose between automatic or manual upgrade modes. For automatic mode, select "FR_CMR" from the system menu and then choose the event "795.NX4, NX4 HEV/PHEV, NX4A, NX4AT LKA LOGIC IMPROVEMENT" to initiate the update. The system will check the battery voltage; it must be at least 12 volts.
4. Upgrade Process: The software upgrade proceeds in two stages (1/2 and 2/2). Technicians must not disconnect any cables or touch system buttons during this process. Once the upgrade reaches 100%, the ignition key must be turned OFF for 10 seconds, then back ON.
5. Post-Update: After the upgrade is complete, check for and clear any incidental Diagnostic Trouble Codes (DTCs) that may have been generated. Finally, start the engine to confirm proper vehicle operation.

Required Tools or Parts

Technicians will require specific equipment to perform this software update:

• GDS-Mobile System: This includes the Tablet PC and the VCI-II interface.
• Causal Parts: The warranty information references causal parts 99211-N9200 and 99211-N9100, although the primary action is a software upgrade.

Owner Action

If you own a 2022 Hyundai Tucson, Tucson Hybrid, or Tucson Plug-in Hybrid and experience issues with your Hyundai Tucson Lane Keep Assist system, such as overly sensitive warnings or lane misrecognition, you should contact your authorized Hyundai dealership. While this particular service campaign is primarily for dealer stock, your dealership can check if your vehicle's LKA software requires this update and perform the necessary service. The operation time for this LKA upgrade is estimated at 0.4 hours.

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Source: NHTSA ID: 10208861