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

BCU 523702.31 (BCU )

Code: 523702.31



Error code BCU 523702.31 is triggered when the Basic Control Unit (BCU) of a John Deere vehicle fails to receive or incorrectly receives the Vehicle Identification Number (VIN). This diagnostic trouble code indicates a communication error within the vehicle’s control system that could stem from faulty data transmission, errors in VIN configuration, or issues within the BCU itself that prevent the accurate reading or verification of the VIN.


This discrepancy may impact the functionality of systems that rely on VIN verification for operation or diagnostics. It could result in limited access to specific vehicle features, incorrect vehicle data being displayed, or issues with regulatory compliance.


  • Check VIN Configuration and Entry: Verify the VIN programmed into the BCU. Ensure that the VIN matches the vehicle’s actual VIN, correcting any discrepancies or typographical errors in the entry.
  • Inspect BCU and Connections: Examine the BCU and its connections for faults that could affect data transmission, such as damaged wires or loose connectors. Ensure that all connections are secure and that the BCU is functioning properly.
  • Test VIN Transmission: Utilize diagnostic tools to test the transmission and reception of the VIN within the vehicle’s network. This can help identify whether the issue is localized to the BCU or if it involves other components of the vehicle’s electronic system.
  • Reprogram or Reset the BCU: If errors are found in the VIN settings or data handling, reprogram or reset the BCU to correct these issues. Ensure that all software and firmware are up-to-date and correctly configured.
  • Verify Correct Operation: After any adjustments or repairs, verify that the BCU correctly receives and processes the VIN. Check that all vehicle systems recognize the VIN and function as intended.
  • Continuous Monitoring and Maintenance: Keep the system under observation to ensure no further issues with VIN information occur. Regular maintenance checks can prevent recurrence and ensure the vehicle’s systems remain operational and compliant.


Accurate VIN information is crucial for vehicle identification, diagnostics, and compliance with regulatory standards. Ensuring that the VIN is correctly programmed and recognized by the vehicle’s control units is fundamental to maintaining the functionality and security of the vehicle. Regular system checks, timely updates, and maintenance of the electronic and communication systems are essential to uphold the integrity and reliability of the vehicle.