Description:

This diagnostic trouble code (DTC) UIC 523959.31 is triggered if the control unit fails to detect tractor motion even though all the preconditions for motion are met. In its active state, this fault also generates a diagnostic trouble code at the Transmission Control Unit (TCU) or Programmable Logic Controller (PLC). These diagnostic trouble codes take priority.

Reaction:

When this error occurs, the control unit may prevent the tractor from moving or may limit its functionality to ensure safe operation and prevent potential damage.

Recommendations:

• Inspect Transmission System:
  • Check the transmission system for any signs of damage or malfunction.
  • Ensure all connections and wiring related to the transmission are secure and free from damage.
• Verify Preconditions for Motion:
  • Confirm that all preconditions for tractor motion are being met, such as gear selection, operator presence, and no active faults in related systems.
• Check TCU and PLC for Faults:
  • Use diagnostic tools to read and address any error codes stored in the TCU or PLC.
• Perform Transmission Calibration:
  • If applicable, perform a transmission calibration to ensure all sensors and controls are properly aligned.
• Consult Technical Support:
  • If the issue persists, contact John Deere technical support for further diagnostics and potential solutions.

Note:

• Regular maintenance and inspection of the transmission system can help prevent such faults and ensure reliable operation.