2021-2022 Hyundai Immobilizer Software Update & Decals

Hyundai has released Technical Service Bulletin (TSB) 23-01-014H-6, initiating Service Campaign 993, to address security concerns in various models, including the 2021-2022 Hyundai Tucson. This campaign specifically targets vehicles that may not have been originally equipped with an immobilizer. The TSB outlines a procedure to update the IBU/BCM (Integrated Body Control Unit/Body Control Module), to revise the OEM Hyundai burglar alarm system operation and ignition start logic, and install two anti-theft decals for the front windows.

This TSB 23-01-014H-6, dated November 2023, supersedes a previous version, 23-01-014H-5. The updated bulletin includes a note referencing TSB 23-BE-010H (OEM GENUINE HYUNDAI REMOTE START MODULE SOFTWARE UPDATE) and additional target ROM IDs for Elantra (AD/ADa) models on page 17. Dealers are mandated to 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. This ensures that the Hyundai Tucson immobilizer system and other affected models receive the necessary security enhancements.

Why This Update Matters

The absence of an immobilizer system can leave vehicles vulnerable to theft. This service campaign proactively addresses this vulnerability by implementing a software update to the IBU/BCM. This update is designed to improve the vehicle's security by modifying the burglar alarm system's operation and the ignition start logic, making it more difficult for unauthorized individuals to start the vehicle. The installation of anti-theft decals further serves as a visual deterrent.

Important Warnings for Owners

Owners should be aware of several critical points regarding this service campaign:

• "Vehicles equipped with aftermarket/add-on alarms or remote start systems may not operate normally if the IBU/BCM is updated with this software." If your vehicle has such systems, consult your dealer.
• "Vehicles equipped with the OEM Genuine Hyundai remote start system may exhibit the horn honking when remote starting the vehicle after receiving the software update." To resolve this, refer to TSB 23-BE-010H (or its latest version) to update the remote start module.
• If the Auto Mode update is not available due to an unidentified ROM ID, then "DO NOT perform the update using Manual Mode, call Techline for further instructions." This is a critical directive for technicians to prevent incorrect software installation.
• If a software update fails and an error message appears, technicians are guided to "Select OK when the error message pops up, and DO NOT SELECT ANYTHING ELSE, LEAVE EVERYTHING AS IS." This prevents further complications during the update process.
• "If the window is tinted with a non-legal shade, inform the customer of the possible poor visibility of the anti-theft decals." This ensures owners are aware that the decals might not be clearly visible.
• "Once the upgrade procedure has been completed, the key fob buttons to lock and unlock the vehicle are required to activate/deactivate the anti-theft system. After using the key fob to activate the anti-theft system, the key fob must be used to first disarm the system prior to attempting to start the vehicle." This is crucial for proper system function after the update.

Diagnosis and Inspection Procedure

Before performing the software update, technicians must inspect the vehicle to determine if it is equipped with a START/STOP button or an immobilizer lamp. This inspection is a critical first step in Service Campaign 993. The process, as detailed in the TSB, involves:

1. Visually Confirming START/STOP Button: Technicians visually confirm if the vehicle is equipped with a START/STOP button. They must use the STUI (Service Technical Update Information) system to take a picture of the START/STOP button, including a piece of paper displaying the last 6 digits of the VIN and the date of the inspection. This photo is then uploaded to STUI. An example image on page 6 of the TSB shows a START/STOP button with a handwritten VIN and date on a sticky note.
2. Inspecting for Immobilizer Lamp: If the vehicle is not equipped with a START/STOP button, technicians proceed to inspect for an immobilizer lamp. For vehicles with a mechanical key type ignition, the ignition is turned to the ON position. Technicians then visually confirm if an immobilizer lamp is displayed on the instrument cluster. Similar to the START/STOP button, a picture of the immobilizer lamp on the instrument cluster, along with the last 6 digits of the VIN and the date of inspection, is uploaded to STUI. An example image on page 6 shows an immobilizer lamp icon on an instrument cluster with a VIN and date.

If the vehicle is not equipped with either a START/STOP button or an immobilizer lamp, it qualifies for the software update and decal installation. Otherwise, if either is present, the inspection is complete, and an "INSPECTION ONLY" campaign claim is submitted.

IBU/BCM Software Update Procedure (Service Campaign 993)

The core of Service Campaign 993 involves updating the IBU/BCM software to enhance the Hyundai Tucson immobilizer system and other affected models. The procedure, which references TSB 15-GI-001 for tablet-based Mobile GDS ECU update procedures, includes these key steps:

1. System Selection: The technician connects the GDS (Global Diagnostic System) and selects "IBU/BCM" as the system to update from the system menu, as depicted in a GDS screen capture on page 8 of the TSB.
2. ID Check: An ID check is performed to identify the current ROM ID (Read-Only Memory Identifier) of the IBU/BCM. The current ROM ID is compared against extensive ROM ID information tables provided in the TSB (e.g., pages 13-36) to determine if an update is necessary. Technicians are advised to take a picture or write down the current ROM ID in case a manual update is required. A GDS screen capture on page 8 shows the "Currently in Vehicle" ROM ID and the "Latest Update" ROM ID.
3. GDS Software Update (Auto Mode): The update is initially performed in Auto Mode using the GDS. If the update starts but then fails in Auto Mode, or if Auto Mode is unavailable due to an unidentified ROM ID, technicians are instructed to not proceed with Manual Mode but to contact Techline for further guidance. The TSB emphasizes, "DO NOT perform the update using Manual Mode, call Techline for further instructions."
4. Manual Update Troubleshooting: If the software is updating and fails (not related to GDS disconnection or battery issues) at any percentage, technicians are guided to "Select OK when the error message pops up, and DO NOT SELECT ANYTHING ELSE, LEAVE EVERYTHING AS IS." They then turn the ignition OFF for 15 seconds, turn it back ON, and proceed with the MANUAL update procedure following the GDS screen instructions. When selecting the MANUAL PASSCODE, technicians must pay close attention to the part number and software version in the tables, ensuring the selected passcode and event match what was originally in the vehicle.
5. Concurrent Decal Installation: The anti-theft decals are installed while the software update is in progress. This is noted as an efficiency measure.
6. Verification: After the software update, technicians confirm its success by checking for and erasing any Diagnostic Trouble Codes (DTCs) in all menus. A GDS screen capture on page 8 shows a "100% Succeed" message indicating a successful ECU upgrade.

Required Parts and Tools

For the physical security enhancement, specific anti-theft decals are required:

• Anti-Theft Decal: Part Number NP001-SC993. These decals are ordered in rolls of 500. Two decals are applied per vehicle. Ordering information can be found in the SC993 Parts Bulletin located in the Documents Library in WebDCS.

Anti-Theft Decal Installation Procedure

The installation of the anti-theft decals is a precise process to ensure proper visibility and adherence, as detailed on pages 9-11 of TSB 23-01-014H-6:

1. Template Preparation: Technicians print the last page of the TSB (page 37), which serves as a template. This template is folded from the bottom upward to the solid line and then two rectangular cut-outs are made, as shown in images on page 9.
2. Window Cleaning: The inside lower left corner of the front driver's side window and the lower right corner of the front passenger's side window are cleaned with rubbing alcohol and a new rag. An image on page 10 shows a technician cleaning the window.
3. Template Alignment: The prepared template is aligned approximately 1¼ inches next to any existing label or decal's edge on the window. Masking tape is used to secure the template onto the glass and door panel. An image on page 10 illustrates the template alignment.
4. Decal Application: Two anti-theft decals are torn or cut from the NP001-SC993 roll. Without touching the bottom (glue side) of the decal, the paper backing is carefully pulled halfway, and the decal is aligned within the template's cut-out rectangle. The decal is then firmly pressed onto the window glass with a thumb. A critical "NOTICE" warns, "Avoid touching the bottom (glue side) of the decal as the fingerprint will reduce the adhesive strength to the window glass." Images on page 11 show the decal being applied.
5. Final Steps: The template is removed. Technicians continue pressing down on the decal to ensure there are no visible bubbles within it. This process is repeated for the other window.

Post-Installation Notes

After the upgrade procedure is completed, specific actions are required for the anti-theft system to function correctly:

• The key fob buttons to lock and unlock the vehicle are required to activate/deactivate the anti-theft system.
• After using the key fob to activate the anti-theft system, the "key fob must be used to first disarm the system prior to attempting to start the vehicle." This ensures proper synchronization and operation of the enhanced security features. Images on page 12 show the installed anti-theft decals on the driver and passenger front windows, each with a VIN and date for STUI photo submission.

Addressing Remote Start Systems

For vehicles equipped with an OEM Genuine Hyundai remote start system, the IBU/BCM software update may initially cause the horn to honk when remote starting. This is a known issue, and Hyundai provides a solution through TSB 23-BE-010H (OEM GENUINE HYUNDAI REMOTE START MODULE SOFTWARE UPDATE). This separate bulletin details the procedure to update the remote start module, which will eliminate the horn honking during remote start operation.

Warranty Information

This TSB includes inspection/repair validation photos and requires adherence to the latest Warranty Digital Documentation Policy. For warranty claims related to Service Campaign 993, technicians must submit the claim on the Claim Entry Screen as "Campaign" type. The TSB provides detailed warranty claim information for various models, specifying Operation Codes (OP. CODE), Causal Part (CAUSAL PART), Nature (NATURE), and Cause (CAUSE) codes. For example, for a 2021-2022 Hyundai Tucson (NX4/NX4a), an inspection only might use OP. CODE HYIMMOD8 or HYIMMOD9, with Causal Part 95400-N9001 or 95400-CW051, Nature 114, and Cause ZZ3. For inspection and upgrade, the OP. CODE would be HYIMMOBO or HYIMMOB5 for the same models.

Operation times vary: 0.1 M/H for inspection only (vehicles with START/STOP button or immobilizer lamp) and 0.3 M/H or 0.4 M/H for inspection, software update, and decal installation, depending on the model. These times include taking STUI photos and uploading them. STUI photos for claims must include the anti-theft decals on both front windows, clearly visible, along with a piece of paper displaying the last 6 digits of the VIN and the date of the repair. Failure to include these photos will result in the claim being debited.

What Owners Should Do

If you own a 2021-2022 Hyundai Tucson or another affected Hyundai model, and your vehicle is not equipped with an immobilizer, you should contact your authorized Hyundai dealer to schedule an appointment for Service Campaign 993. This update is performed free of charge and is crucial for enhancing your vehicle's security. Ensure you discuss any aftermarket or OEM remote start systems with your dealer, as additional steps or updates may be required. Your dealer can access your vehicle's information via WEBDCS to identify any open campaigns.

NHTSA ID: 10245579