BCU 522451.14 – Non-Existent Function Activated, Open Circuit Detected. John Deere System Advisory.

BCU 522451.14 (BCU )

Code: 522451.14



Error code BCU 522451.14 is issued when the Basic Control Unit (BCU) of a John Deere vehicle detects an open circuit in response to an activation command for a function that does not exist within the system’s configuration at address BCU071. This diagnostic trouble code signifies that there is a misconfiguration or error within the vehicle’s electronic control system, potentially leading to safety risks or operational inefficiencies.


The system might not respond to the activation attempt since the function does not exist. However, the detection of an open circuit is critical as it suggests a possible wiring fault or system error that needs to be addressed to prevent potential electrical safety issues.


  • Check System Configuration: Confirm that all settings within the BCU are correct and that there are no erroneous entries or misconfigured functions. Update the system configuration if necessary to remove any invalid function activations.
  • Inspect Wiring and Electrical Connections: Examine the electrical connections, particularly around the specified BCU address, for any signs of damage or disconnection that could lead to an open circuit.
  • Utilize Diagnostic Tools: Perform comprehensive diagnostics using appropriate tools to understand why the system is attempting to activate a nonexistent function. This may help uncover underlying issues within the control unit or software.
  • Repair or Replace Faulty Wiring: If any issues are found during the inspection, make necessary repairs or replacements to ensure that the electrical system is intact and functioning correctly.
  • Reset the BCU and Clear Error Codes: After making any corrections to the system or wiring, reset the BCU to clear this and any related diagnostic trouble codes. This action will help reinitialize the system with the correct settings.
  • Test System Functionality: Ensure all functions of the vehicle are tested following repairs to confirm that no further issues exist and that the system responds appropriately to all operator inputs.
  • Documentation and Training: Update operational manuals and training materials if necessary, and ensure that all relevant personnel are informed about the correct operation and configurations of the vehicle’s control systems.


Preventing the activation of nonexistent functions and ensuring all electronic systems are properly configured and maintained are crucial for safe and efficient operation. Regular system checks and maintenance are essential to identify and correct any discrepancies in the system settings or physical wiring, ensuring the vehicle operates as intended without posing risks to the operator or the environment.