2021-2022 Nissan Telematics System Service TSB

Nissan has released Technical Service Bulletin (TSB) NTB20-029E, updated on March 3, 2022, to provide comprehensive service information for the Telematics (IVC) system in various 2021-2022 Nissan models. This bulletin outlines important procedures for setting up and maintaining the telematics system, especially after a Telematics Communication Unit (TCU) replacement.

This TSB supersedes previous versions, including NTB20-029, NTB20-029A, NTB20-029B, NTB20-029C, and NTB20-029D. It ensures that the in-vehicle communication systems, which support features like NissanConnect® Services and SOS functionality, operate correctly.

Symptoms

Owners may experience issues with their vehicle's telematics system, including problems with the Wi-Fi hotspot or general functionality of NissanConnect® Services. If the TCU is not properly configured or replaced according to the bulletin's steps, "telematics services will not operate properly."

Another specific symptom is the dashboard message: "There is no current Wi-Fi connection. Please go to the Connections menu and connect the vehicle to a Wi-Fi hotspot."

Important Warnings

Nissan emphasizes several critical points for both technicians and owners:

• Wi-Fi Hotspot Concerns: "If the customer experiences Wi-Fi hotspot related concerns only, DO NOT replace the TCU. Have the customer contact the AT&T Support line at 1 (888) 719-7242."
• Warranty Claims: "If the TCU is replaced and the steps are not followed, the warranty claim will be denied."
• TCU Replacement: "To avoid damage to the vehicle, only install new, unused TCUs into a vehicle. Each TCU is registered to a specific VIN and will not function if swapped into another vehicle." The new/replacement TCU must come from Nissan North America parts supply.
• Intelligent Keys: "You MUST have ALL customer Intelligent Keys collected" for registration during the procedure.
• Configuration Order: "Configuration must be completed prior to performing the Write the VIN to the TCU procedure. If performed prior to configuration, the TCU may not function properly and might need replacement."
• VIN Entry: "If manually entering the VIN, double check that the VIN is correct before saving. Saving the incorrect VIN to the TCU can result in services not working and the TCU may need to be replaced, even after correcting the wrong VIN."
• Network Initial Settings: If the "Network initial setting state" result is a number between 1 and 5, wait 24 hours and re-perform the steps. If it displays a number between 1 and 5 again after a third attempt, contact the Nissan Owner Services call center at (855) 426-6628.

Repair Procedure Summary

The TSB outlines a multi-step process for servicing the telematics system, particularly when replacing the TCU. This ensures the proper functioning of the Nissan Sentra telematics service and other affected models.

1. Save VIN Data from Original TCU: Technicians use the CONSULT PC and Vehicle Interface (VI) to connect to the vehicle. After turning the ignition ON (engine OFF), they launch C-III plus software, select "Diagnosis (One System)", then "IVC", and finally "Work Support" to "SAVE VIN DATA." This step is crucial for transferring vehicle-specific information.
2. Remove Original TCU: The original TCU is removed by following instructions in the Electronic Service Manual (ESM) under "DRIVER INFORMATION & MULTIMEDIA > AUDIO VISUAL & NAVIGATION SYSTEM > REMOVAL AND INSTALLATION > TCU."
3. Install New TCU: The new TCU is installed, and its part number (e.g., 28275 XXXXX) is recorded. Installation also follows ESM procedures.
4. Configure the TCU: This involves selecting "Re/programming, Configuration" on the CONSULT PC, then "IVC." Depending on the vehicle model (e.g., Rogue), technicians may select "Configuration" or "After ECU Replacement" followed by "Manual selection." They then choose the appropriate "Type ID" from a provided chart (e.g., 28277-6JL0A for Armada, 28277-6LB0A for Sentra with Remote Engine Start).
5. Write the VIN to the TCU: The VIN is written to the new TCU. This can be done by selecting "WRITE VIN (SAVED DATA)" from IVC Work Support or by manually entering the VIN if the saved data method fails. The system confirms successful VIN writing.
6. Confirm Network Initial Settings (if needed): If the TCU part number is not 28275-5SN0B, 28275-5SN0F, or 28275-5SN4B, technicians proceed to confirm network settings. This involves selecting "Network initial settings" in IVC Work Support and initiating the process. The result, displayed as a percentage, indicates completion. If the result is between 1 and 5, a 24-hour wait and retry is necessary.
7. Verify Telematics Function: This step involves specific ignition cycles and checking the infotainment screen for software update status. The goal is to see either "This software version is the latest version" or "There is a new software update available." If a "There is no current Wi-Fi connection" message appears, the verification steps must be repeated.
8. Intelligent Key Registration: Finally, all customer Intelligent Keys must be registered using the C-III plus operations manual.

Required Tools or Parts

• CONSULT PC: Nissan's diagnostic computer.
• VI (Vehicle Interface): Connects the CONSULT PC to the vehicle.
• Battery Maintainer/Smart Charger: Set to reflash mode or similar, ensuring voltage between 12.0 V and 15.5 V during programming.
• New/Replacement TCU: Must be sourced from Nissan North America parts supply. Specific part numbers mentioned include 28275-5SN0B, 28275-5SN0F, and 28275-5SN4B.
• ESM (Electronic Service Manual): For detailed removal and installation instructions.
• C-III plus software: Must be synchronized and updated via ASIST.

Owner Action

If you are experiencing issues with your Nissan's telematics services, including Wi-Fi hotspot problems, it is recommended to contact your authorized Nissan dealer. They have the necessary tools and training to diagnose and perform the procedures outlined in this TSB. If your concern is solely related to the Wi-Fi hotspot, your dealer may advise you to contact AT&T support directly.