2021-2023 Nissan Sentra Radio Reboot TSB

Symptoms

Owners of affected Nissan vehicles may experience their radio intermittently rebooting while audio is played from a Bluetooth® connected iPhone. This can disrupt audio playback and infotainment system functionality. This specific issue, the Nissan Sentra radio reboot, is detailed in Nissan's Technical Service Bulletin NTB20-016F.

Diagnosis and Trigger Conditions

This issue specifically occurs when an iPhone is connected via Bluetooth, and audio is being played through the vehicle's infotainment system. If your vehicle exhibits the symptom of the radio intermittently rebooting under these conditions, it likely falls under the scope of this bulletin. The first step in diagnosis involves confirming the current software version of the AV Control Unit.

Repair Procedure Summary

To resolve the intermittent radio reboot issue, technicians will perform a software update on the AV Control Unit. The process involves checking the current SYS Software Version against the requirements specified in Nissan Technical Service Bulletin NTB23-018.

If the vehicle's software version is older than the specified threshold, the technician will proceed with the update. This update is delivered in two parts:

1. Download and Install Update File #1: The first software file is loaded onto a USB drive and installed into the vehicle's AV Control Unit.
2. Download and Install Update File #2: After the first file is successfully installed, the second software file is then loaded onto the same USB drive and installed. It's crucial that these files are installed sequentially, as the vehicle can only accept one update file at a time.
3. Initialize Audio Unit & Restore Settings: Following the installation of both update files, the audio unit will be initialized, and its settings restored to ensure proper functionality.

For detailed instructions on obtaining the software and performing the update, technicians are directed to refer to bulletin NTB23-018. This procedure specifically addresses the Nissan Sentra radio reboot problem.

Important Warnings for Owners

Nissan emphasizes that this bulletin is intended for qualified technicians. Attempting this repair as a "do-it-yourselfer" is not recommended.

• "Nissan Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are properly trained individuals who have the equipment, tools, safety instruction, and know-how to do a job properly and safely."
• "You MUST closely follow the entire SERVICE PROCEDURE located in NTB23-018 as it contains information that is essential to successfully completing this repair."

Owner Action

If you are experiencing your radio intermittently rebooting during audio playback via a Bluetooth-connected iPhone in your 2021-2023 Nissan Sentra, you should schedule an appointment with an authorized Nissan dealer. The dealer will diagnose the issue and perform the necessary AV Control Unit software update as outlined in TSB NTB20-016F. This repair is typically covered under warranty if your vehicle is within the applicable warranty period.

Frequently Asked Questions

Q: Are 2 different files required to complete this update? A: Yes. This update is split into 2 parts. Both parts are required to complete the update.

Q: Can I load both files onto the USB drive at the same time? A: No. Only 1 file can be loaded onto a USB drive at a time. ASIST will delete any other files on the USB drive prior to transferring the selected file.

Q: Is there a way to install both files onto the vehicle at the same time? A: No. The vehicle can only accept 1 file at a time. Files must be installed in the correct order to complete the update (Update File #1, then Update File #2).

Q: Do I need 2 USB drives to perform this TSB? A: No. Only 1 USB drive is required to perform this TSB.

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Source: NHTSA ID: 10235729