2021-2023 Nissan Automatic eCall DTC B2E1B-06 TSB

Nissan Technical Service Bulletin (TSB) NTB23-031 addresses a specific diagnostic trouble code (DTC) related to the Automatic eCall system in several 2021-2023 Nissan models. This TSB provides crucial guidance for technicians on how to properly diagnose and resolve the "DTC B2E1B-06 (AUTOMATIC ECALL) STORED AS CURRENT IN IVC" fault. Understanding this bulletin can help owners ensure their vehicle receives the correct repair.

The Automatic eCall system is a critical safety feature in modern vehicles. It automatically contacts emergency services in the event of a serious accident, or can be manually activated by pressing an SOS switch. This system relies on the Telematics Communication Unit (TCU) to function correctly.

Symptoms

The primary symptom addressed by this TSB is the presence of Diagnostic Trouble Code (DTC) B2E1B-06. This code specifically relates to the Automatic eCall system. Owners might not see a direct warning light for this specific DTC, but it would be detected during a diagnostic scan by a technician. The key indicator for technicians is the verbatim fault label: "DTC B2E1B-06 (AUTOMATIC ECALL) STORED AS CURRENT IN IVC".

Fault Codes / DTCs

This TSB specifically details one diagnostic trouble code:

Code	Description
B2E1B-06	Automatic eCall System Fault

Important Warnings

Nissan has issued a specific warning regarding the diagnosis of this DTC to prevent unnecessary part replacements:

• "If DTC B2E1B-06 is not “CRNT” in the IVC, DO NOT replace the TCU. Erase the DTC. No further steps are needed."

This means that if the fault code is stored as a "history" code and is not actively present ("CRNT" or Current) in the In-Vehicle Communication (IVC) system, the Telematics Communication Unit (TCU) should not be replaced. Replacing the TCU in such a scenario would not resolve the underlying issue and would be an unnecessary repair.

Diagnosis and Trigger Conditions

The diagnosis for the "Nissan Automatic eCall B2E1B-06" fault hinges on the status of the DTC within the IVC system. Technicians must check if DTC B2E1B-06 is reported as "CRNT" (Current) or not.

• If the DTC is NOT "CRNT": This indicates the fault is not actively present. The TSB instructs technicians to simply erase the DTC. No further action or part replacement is required.
• If the DTC IS "CRNT": This signifies an active fault with the Automatic eCall system. In this case, the Telematics Communication Unit (TCU) requires replacement.

Repair Procedure Summary

For vehicles exhibiting the "Nissan Automatic eCall B2E1B-06" fault as "CRNT" in the IVC, the repair involves replacing the Telematics Communication Unit (TCU). Technicians are directed to refer to the Electronic Service Manual (ESM) for the detailed procedure. The specific section within the ESM is: REPAIR > DRIVER INFORMATION & MULTIMEDIA > AUDIO, VISUAL & NAVIGATION SYSTEM > REMOVAL AND INSTALLATION > TCU. This ensures the correct steps are followed for safe and effective replacement of the unit.

Owner Action

If you own a 2021-2023 Nissan model listed in this bulletin and suspect an issue with your Automatic eCall system, or if a diagnostic scan has revealed DTC B2E1B-06, it is recommended to visit an authorized Nissan dealer. The dealer's qualified technicians have the necessary diagnostic tools and access to the Electronic Service Manual (ESM) to accurately determine if the DTC is "CRNT" and if a TCU replacement is required under TSB NTB23-031. This will ensure your vehicle's safety systems are functioning correctly.

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NHTSA ID: 10235777