ACU 000629.12 (ACU 629.12 ) – Software Execution Timeout in Armrest Control Unit

ACU 000629.12 (ACU 629.12)

Code: 000629.12

Shortcode: 629.12


This error code ACU 629.12 signals a timeout failure where the armrest control unit’s software did not complete its execution within the allotted time frame. This issue could be indicative of software inefficiency, processing delays, or system overload.


In response to this fault, the control unit defaults the system to a neutral position to prevent any unintended or unsafe machine operations, which could arise from incomplete or delayed software execution.


  • Restart the control unit to clear any temporary software or memory glitches that may be causing the delay.
  • Check for software updates from John Deere that might address and rectify known bugs or performance issues causing execution delays.
  • If the issue recurs, perform a deeper diagnostic check to identify any underlying hardware issues, such as processor performance or memory capacity problems, that might be contributing to the slow software execution.
  • Reduce the load on the armrest control unit by closing unnecessary processes or adjusting the configuration settings to optimize software performance.
  • If problems persist, consult with a certified John Deere technician who can provide further analysis and potentially replace the armrest control unit if it is found to be defective.


Software execution delays can lead to significant operational inefficiencies and potential safety hazards. Addressing them swiftly ensures the reliability and safety of the machinery’s operation.