Description:

This diagnostic trouble code (DTC) UIC 523961.12 is generated when the UIC control unit detects a travel speed of more than 0.1 km/h (0.06 mph) for longer than 0.7 seconds after engaging the park lock.

Reaction:

When this error occurs, the control unit may activate a warning and potentially limit the vehicle’s operation to ensure safe conditions.

Recommendations:

• Verify Park Lock Engagement:
  • Ensure that the park lock is fully engaged and that there is no movement when the park lock is applied.
• Check Travel Speed Sensor:
  • Inspect the travel speed sensor to ensure it is providing accurate readings and not malfunctioning.
• Inspect Park Lock Mechanism:
  • Ensure that the park lock mechanism is not slipping or failing to hold the tractor stationary.
• Inspect Wiring and Connections:
  • Verify that all wiring and connections related to the park lock and travel speed systems are secure and free from damage or corrosion.
• Perform System Diagnostics:
  • Use diagnostic tools to read and clear any related error codes and perform system tests to ensure proper functionality.
• Consult Technical Support:
  • If the issue persists, contact John Deere technical support for further diagnostics and potential solutions.

Note:

Regular checks of the park lock and speed sensor systems are crucial to prevent such issues and ensure safe operation.