BCU 523702.31 – Incorrect VIN Information Detected by BCU. John Deere System Advisory.

BCU 523702.31 (BCU )

Code: 523702.31



Diagnostic trouble code BCU 523702.31 is generated when there is an issue with the reception of the Vehicle Identification Number (VIN) by the Body Control Unit (BCU). This situation occurs either when the VIN is not received at all, or when it is incorrectly received, suggesting a problem with data transmission or erroneous VIN configuration within the BCU. This issue can affect the vehicle’s regulatory compliance and may interfere with system diagnostics and services that require accurate VIN data.


The system may display an error or warning message regarding the VIN, and certain functions that rely on VIN verification could be limited or disabled until the issue is resolved.


  • Verify VIN Configuration: Check the configuration settings in the BCU to ensure the VIN has been entered correctly and corresponds accurately to the vehicle’s actual identification number.
  • Inspect Communication Links: Examine the communication pathways that transmit the VIN to the BCU for any disruptions, such as faulty wiring, bad connections, or interference.
  • Reset and Reconfigure the BCU: Perform a reset on the BCU and carefully reconfigure the VIN settings. This may resolve issues related to incorrect data storage or transmission.
  • Test System Functionality: After adjustments, test the system to ensure that the VIN is being correctly transmitted to and received by the BCU. Use diagnostic tools to verify the accuracy of the VIN within the system.
  • Consult with a Specialist: If the issue persists, it may be advisable to consult with a specialized technician or the manufacturer’s support team to delve deeper into the system’s configuration and fix any underlying problems.


Accurate VIN information is critical for vehicle management, legal compliance, and access to the correct diagnostic and maintenance services. Regular system checks and maintenance can help ensure that such crucial data remains correct and effective in supporting vehicle operations and compliance requirements.