Description:

This diagnostic trouble code (DTC) UIC 523961.02 is generated if there is a park lock engagement signal at the control unit, even though the reverse drive lever is not in the park position. However, this diagnostic trouble code may also be generated by mistake during transmission calibration.

Reaction:

When this error occurs, the control unit may prevent the park lock from disengaging, potentially immobilizing the tractor to ensure safety.

Recommendations:

• Verify Park Lock Mechanism:
  • Inspect the park lock mechanism to ensure it is functioning correctly and not physically stuck or damaged.
• Inspect Reverse Drive Lever:
  • Check the reverse drive lever to ensure it is in the correct position and the sensor for park position is functioning properly.
• Check Wiring and Connections:
  • Ensure that all wiring and connectors related to the park lock system are secure and free from damage or corrosion.
• Perform Transmission Calibration:
  • If the code was generated during transmission calibration, reset the calibration process and ensure it is performed correctly.
• Replace Faulty Components:
  • If any specific components related to the park lock system 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 inspection of the park lock system can help prevent such faults and ensure reliable operation.