Description:

Error code BCU 002246.09 is activated when the Basic Control Unit (BCU) of a John Deere vehicle detects a data transfer issue with the Drive System Module (DSM). This diagnostic trouble code suggests that one or more CAN bus messages transmitted by the DSM are being received intermittently or not at all by the BCU. Possible causes include loose wiring, faulty connections, or disruptions within the CAN bus system that impede consistent data transmission.

Reaction:

Upon detection of this communication fault, the BCU may trigger dashboard warning indicators to alert the operator and could potentially alter or restrict drive system functions to mitigate the risk of operational errors stemming from the data transfer problem.

Recommendations:

• Inspect CAN Bus Wiring and Connections: Thoroughly check all wiring and connections in the CAN bus system between the BCU and DSM. Ensure connections are tight and free from corrosion or damage, which might be causing intermittent communication.
• Test CAN Bus Communication: Use diagnostic equipment to assess the integrity of the communication between the BCU and DSM. Identify any specific points where data transmission errors or losses occur.
• Repair or Replace Faulty Wiring or Connectors: If any issues are identified during the inspection, repair or replace the affected wiring or connectors to restore stable and reliable communication.
• Verify DSM Functionality: Ensure that the DSM itself is functioning correctly and not contributing to the problem by sending incomplete or corrupted data. Reprogramming or replacing the DSM may be necessary if it is found to be defective.
• Reset the BCU and Clear Diagnostic Codes: After addressing any connection and hardware issues, reset the BCU to clear any stored error codes and reinitialize the system settings. This step ensures that all components are communicating properly without further interruptions.
• Monitor System Performance: Continue to monitor the system after making repairs to ensure that communication has been fully restored and is consistent. Pay particular attention to the performance of the drive system to confirm that all functions are responsive and operating as expected.

Note:

Reliable communication between the BCU and DSM is crucial for ensuring proper operation of the vehicle’s drive system. Regular maintenance of the CAN bus system and prompt attention to communication discrepancies can help prevent operational issues and ensure that the vehicle continues to operate efficiently and safely. Addressing CAN bus communication issues quickly helps minimize downtime and maintain operational efficiency.