Description:

This diagnostic trouble code (DTC) UIC 524254.31 is generated if the UIC control unit detects a problem with the circuit of the transmission enable relay (K06/03 or K02/03). This indicates a defective relay, or a problem with the ground circuit (lead 6003), or with the circuit of the control lead (6064).

• Relay K06/03: Tractors up to Serial Number Break 2008.
• Relay K02/03: Tractors from Serial Number Break 2008.

Reaction:

When this error occurs, the control unit may prevent the transmission from engaging, potentially limiting the tractor’s ability to move.

Recommendations:

• Inspect Transmission Enable Relay:
  • Check the transmission enable relay (K06/03 or K02/03) for proper operation. Replace the relay if it is found to be defective.
• Inspect Ground Circuit:
  • Verify that the ground circuit (lead 6003) is properly connected, free of corrosion, and not damaged.
• Inspect Control Lead Circuit:
  • Ensure that the control lead circuit (lead 6064) is properly connected and free of damage or corrosion.
• Check Wiring and Connections:
  • Inspect all wiring and connectors related to the transmission enable relay for any signs of damage, corrosion, or loose connections.
• Consult Technical Support:
  • If the issue persists, contact John Deere technical support for further diagnostics and potential solutions.

Note:

Regular inspection and maintenance of relays and their associated wiring can help prevent such faults and ensure reliable operation.