UIC 000639.12 – Power Train CAN BUS, High Error Rate

UIC 000639.12 (UIC 639.12)

Code: 000639.12

Shortcode: 639.12

Description:

This diagnostic trouble code (DTC) UIC 000639.12 is generated when the control unit receives too many incorrect CAN BUS messages or when it detects a general problem in the connection to the power train CAN BUS.

Reaction:

When this error occurs, the control unit may limit the functionality of the power train system to prevent potential damage or unsafe operation. This can result in reduced performance or activation of a fail-safe mode.

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:

Regular maintenance and monitoring of the CAN BUS network can help prevent high error rates and ensure reliable operation.


Control Units: John Deere