AIC 000639.14 (AIC 639.14) – CAN Bus Error Limit Exceeded.John Deere AIC System Warning.

AIC 000639.14 (AIC 639.14)

Code: 000639.14

Shortcode: 639.14


This error code, AIC 639.14, indicates that the error limit for the Armrest Interface Control Unit (AIC) on the vehicle’s CAN Bus system has been surpassed. This fault could stem from a short circuit, an open circuit, or excessive traffic, all of which disrupt normal operations and communication across the CAN Bus.


To mitigate potential damage and maintain system integrity, the control unit has disabled the affected function. This safety measure prevents any malfunctions that could arise from unstable or corrupted data transmission.


  • Inspect the CAN Bus network meticulously for any physical faults such as shorts or open circuits. Examine all related wiring and connections for signs of damage or loose connections.
  • Use diagnostic software to monitor and analyze traffic on the CAN Bus. Identify any patterns or spikes that suggest excessive traffic and diagnose devices contributing to this condition.
  • Address any identified hardware issues, such as replacing damaged wires or connectors that may contribute to the system’s instability.
  • Consider reconfiguring the network settings to optimize traffic flow and reduce the load on the CAN Bus. This may involve adjusting the data transmission rates or temporarily disconnecting non-essential devices.
  • Update the firmware or software of the AIC and other connected devices to ensure all components are operating with the most current and stable versions.
  • After resolving the issues, reset the AIC system and conduct comprehensive tests to confirm that the CAN Bus is operating correctly and that the system has returned to normal functionality.


Regularly monitoring the health and traffic of the CAN Bus is crucial for preventing data congestion and ensuring the reliability of vehicle communications. Proactive maintenance and timely updates can help avoid excessive error rates and maintain optimal performance of the control systems.