Description:

This diagnostic trouble code (DTC) UIC 000639.14 is generated when the control unit receives an extremely high number of incorrect CAN BUS messages or detects a significant problem in the connection to the power train CAN BUS.

Reaction:

When this error occurs, the control unit may severely limit the functionality of the power train system, potentially leading to a shutdown or major reduction in performance to protect the system.

Recommendations:

• Inspect CAN BUS Connections:
  • Check all wiring and connectors related to the power train CAN BUS for signs of damage, corrosion, or loose connections.
  • Ensure all connectors are securely attached and free from debris.
• Check 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 control unit software is up-to-date with the latest firmware and patches.
• Replace Faulty Components:
  • If specific components on the CAN BUS network are found to be faulty, replace them as necessary.
• Consult Technical Support:
  • If the issue persists, contact John Deere technical support for further diagnostics and potential solutions.

Note:

A very high error rate on the CAN BUS network is critical and requires immediate attention to prevent severe system issues.