BRC 002000.09 – Missing Engine Control Unit Message in Brake Control. John Deere System Advisory.

BRC 002000.09 (BRC 2000.09)

Code: 002000.09

Shortcode: 2000.09


The error code BRC 002000.09 is associated with a communication failure between the Brake Control Unit (BRC) and the Engine Control Unit (ECU). This issue arises when the BRC does not receive necessary messages from the ECU, which are critical for coordinated vehicle operation and safety.


The control unit’s response to this communication failure is to disable its function, effectively turning the brake control system OFF. This measure is taken to prevent unpredictable behavior that could compromise safety due to the lack of critical information from the engine system.


  • Check CAN Bus Connections: Inspect the Controller Area Network (CAN) connections for any physical damage, loose connections, or corrosion that might be disrupting communication between the BRC and ECU.
  • Diagnose ECU and BRC: Use diagnostic tools to check both the ECU and BRC for any faults or errors that could be affecting message transmission.
  • Monitor and Test Communication Lines: Employ network monitoring tools to verify the integrity and functionality of the communication lines between the ECU and BRC. Look for errors or dropped messages.
  • Update Firmware and Software: Ensure that both the ECU and BRC have the latest firmware and software updates, which might resolve bugs affecting communication.
  • Reset and Reinitialize Systems: After addressing potential issues, reset both units to ensure all settings are correctly applied and communication is reestablished.


Reliable communication between the Brake Control Unit and Engine Control Unit is essential for the safe operation of any vehicle. Regular checks and maintenance of the communication network can help detect and rectify issues early, reducing downtime and enhancing overall vehicle performance and safety.