AIC 524216.02 – Front PTO Switch Circuit Conflict. John Deere System Notification.

AIC 524216.02 (AIC )

Code: 524216.02



The error code AIC 524216.02 is triggered by a conflict within the front Power Take-Off (PTO) switch circuit, where both the ON and OFF positions of the switch are registering the same value. This anomaly suggests a fault in the circuit, such as a defective switch, wiring issues, or problems in the electrical connectivity, which prevents the switch from correctly signaling the PTO status.


Due to this detected issue, the control unit has automatically disabled the front PTO to prevent unintentional operation or potential damage to the PTO system. This safety measure ensures that the PTO does not engage or operate under faulty control conditions.


  • Inspect the Front PTO Switch: Examine the switch for any visible signs of damage, wear, or electrical faults. Check for stuck buttons or other mechanical issues that could cause the switch to fail in signaling distinct ON and OFF positions.
  • Test Electrical Connections and Wiring: Utilize electrical testing equipment to assess the integrity of the wiring and connections involved in the front PTO switch circuit. Look for shorts, open circuits, or any irregularities that might contribute to the problem.
  • Replace or Repair Faulty Components: If the switch or any part of the circuitry is found to be defective, proceed with replacing or repairing the necessary components to restore proper functionality.
  • Verify Switch Functionality: After making any necessary repairs or replacements, test the switch to ensure it now clearly differentiates between ON and OFF positions with corresponding electrical outputs.
  • System Reset and Operational Testing: Reset the control system to clear the error and restore default settings. Conduct thorough operational testing to confirm that the front PTO can be engaged and disengaged correctly and safely.


Regular maintenance and timely repairs of switches and their circuits are crucial for the safe and efficient operation of machinery components like the PTO. Ensuring that all electronic controls are functioning correctly helps prevent operational failures and enhances the reliability of the machinery. Addressing issues promptly when detected is key to maintaining continuous and effective operation.