2020-2022 Nissan BCM Replacement Service Information

Nissan Technical Bulletin NTB20-074A provides essential service information for the Body Control Module (BCM) replacement procedure in several 2020-2022 Nissan models. This bulletin is crucial for technicians to ensure proper functionality after a BCM replacement, particularly emphasizing the correct sequence of steps to avoid irreversible configuration issues. Owners searching for information on Nissan Sentra BCM replacement or similar issues for other models should be aware of these specific requirements.

Important Warnings

This bulletin includes a critical warning regarding the BCM replacement process:

"To prevent damage to the BCM, perform module configuration BEFORE pairing the BCM and Intelligent Key unit."

Failing to follow this sequence can lead to portions of the BCM's configuration becoming permanently locked, making it impossible to change them later. This could result in various vehicle systems not functioning correctly, necessitating further repairs or even another BCM replacement.

Why Proper BCM Replacement Matters

The Body Control Module (BCM) is a central electronic control unit responsible for managing numerous functions within your Nissan vehicle. These functions include, but are not limited to, power windows, door locks, lighting, security systems, and communication with the Intelligent Key unit for keyless entry and ignition. Given its critical role, any BCM replacement must be performed with precision.

The bulletin highlights that once the BCM and Intelligent Key unit have been paired, certain configuration parameters become locked. This means that if the initial module configuration—which tailors the BCM to your specific vehicle's features and options—is not completed beforehand, those settings cannot be adjusted later. This could lead to persistent electrical issues or incorrect operation of various vehicle components.

Repair Procedure Summary

When replacing the BCM in an affected Nissan vehicle, technicians must adhere to the following key guidelines:

• Always Use a New BCM: The bulletin explicitly states that when replacing the BCM, it must always be replaced with a new unit. This ensures compatibility and proper operation.
• Module Configuration Before Pairing: This is the most critical step. The BCM's module configuration, which involves setting up the unit for the specific vehicle's options and features, must be completed before the Intelligent Key unit is paired with the new BCM.
• Follow ESM Procedures: Technicians are instructed to follow the detailed work procedure outlined in the Electronic Service Manual (ESM) for BCM replacement. The specific navigation paths within the ESM are provided:
  • For Pathfinder (R53) and Rogue (T33): Navigate to ELECTRICAL & POWER CONTROL > BODY CONTROL SYSTEM > BASIC INSPECTION > ADDITIONAL SERVICE WHEN REPLACING BCM.
  • For Sentra (B18): Navigate to ELECTRICAL & POWER CONTROL > BODY CONTROL SYSTEM > BASIC INSPECTION > INSPECTION & ADJUSTMENT > ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (BCM).

These steps ensure that the new BCM is correctly integrated into the vehicle's electrical system and that all associated functions, including those managed by the Intelligent Key, operate as intended. Proper execution of this procedure is vital for a successful Nissan Sentra BCM replacement.

Bulletin History

This bulletin, NTB20-074A, is an amendment to a previous version. The original bulletin, NTB20-074, was published on October 14, 2020. The current revision, NTB20-074A, published on January 26, 2022, includes revisions to the list of applied vehicles.

What Owners Should Know

If your 2020-2022 Nissan Pathfinder, Rogue, or Sentra requires a BCM replacement, it is important to ensure that your dealership's service department is aware of and follows the procedures outlined in this technical bulletin. While this is a technical procedure performed by qualified technicians, understanding the importance of the correct steps can help ensure your vehicle's electrical systems are restored to full functionality without issues.