Description:

This diagnostic trouble code (DTC) UIC 002003.09 is generated when a data transfer problem occurs between the TCU and UIC. Reception of CAN messages regarding transmission ratios (status, desired and calculated) and/or general transmission information (rotational speeds, direction of travel, etc.) from the TCU control unit is intermittent or nonexistent. Intermittent reception could be due to a loose wire.

Reaction:

When this error occurs, the control unit may experience issues with interpreting transmission performance data, potentially leading to improper transmission operation or reduced efficiency.

Recommendations:

• Inspect CAN BUS Connections:
  • Check all wiring and connectors between the TCU and UIC for any signs of damage, corrosion, or loose connections.
  • Ensure that all connectors are securely attached and free from debris.
• Verify TCU Functionality:
  • Use diagnostic tools to check the TCU 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 TCU 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.