ECU 522601.09 – Vehicle Controller CAN Communication Error #3. John Deere System Advisory.

ECU 522601.09 (ECU )

Code: 522601.09



This diagnostic trouble code indicates that the ECU detected a CAN message error in the vehicle controller communication. This error can affect the proper functioning of the vehicle’s control systems and lead to operational issues.


The vehicle’s control systems may experience limited or no function due to the CAN communication error, potentially resulting in reduced performance and efficiency.


  • Inspect CAN Bus Wiring and Connections: Check for damaged, frayed, or loose wiring and connectors associated with the CAN Bus and vehicle controller. Repair or replace as necessary.
  • Test CAN Bus Communication: Use diagnostic tools to test the CAN Bus communication between the ECU and the vehicle controller. Ensure that there are no interruptions or data transfer issues.
  • Check for Loose Connections: Verify that all connections related to the vehicle controller are secure and free of corrosion.
  • Verify Vehicle Controller Function: Ensure that the vehicle controller is functioning correctly and able to send and receive CAN messages.
  • Reset ECU and Monitor System: After resolving the issue, reset the ECU to clear the fault code and monitor the system to ensure normal operation.


Maintaining proper CAN communication between the ECU and the vehicle controller is essential for the accurate functioning of the vehicle’s control systems. Regular inspections and timely maintenance can help prevent communication-related issues.

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