Description:

This diagnostic trouble code (DTC) UIC 002033.09 is generated when a data transfer problem occurs between the BCU and UIC. Reception of the CAN message from the BCU control unit regarding the status of the front-wheel drive is intermittent or nonexistent. Intermittent reception could be due to a loose wire. The missing CAN message is ignored by the UIC control unit once the engagement of front-wheel drive has been reported by the BCU control unit.

Reaction:

When this error occurs, the control unit may experience issues with interpreting the status of the front-wheel drive, potentially leading to improper operation or control of the front-wheel drive system.

Recommendations:

• Inspect CAN BUS Connections:
  • Check all wiring and connectors between the BCU and UIC for any signs of damage, corrosion, or loose connections.
  • Ensure that all connectors are securely attached and free from debris.
• Verify BCU Functionality:
  • Use diagnostic tools to check the BCU for any internal faults or issues that may affect data transmission.
• Monitor CAN BUS Network:
  • Use diagnostic tools to monitor the CAN BUS network for errors and identify any problematic areas.
  • Verify the network’s termination and resistance to ensure it is within the specified range.
• Update Control Unit Software:
  • Ensure the BCU and UIC software are up-to-date with the latest firmware and patches.
• Consult Technical Support:
  • If the issue persists, contact John Deere technical support for further diagnostics and potential solutions.

Note:

Regular inspection and maintenance of the CAN BUS network can help prevent data transfer issues and ensure reliable operation.