AIC 522549.02 – Engine Speed Control Module Switch Conflict. John Deere System Notification.

AIC 522549.02 (AIC )

Code: 522549.02



The error code AIC 522549.02 identifies a conflict within the engine speed control module, specifically involving the foot pedal lock button. The issue arises because both the ON and OFF contacts of the button are showing the same value, suggesting that the switch may be stuck in one position or that there is a defect in the circuit controlling these states.


As a result of this detected conflict, the control unit has disabled the function related to the foot pedal lock button to prevent any erratic behavior or potential safety risks associated with inconsistent engine speed control.


  • Inspect the Foot Pedal Lock Button: Examine the button for any signs of physical jamming or damage that could cause it to stick. Look for debris or wear that might prevent the switch from toggling between ON and OFF states.
  • Check Electrical Connections and Circuitry: Evaluate the wiring and circuitry associated with the foot pedal lock button. This includes testing for shorts, opens, or other electrical faults that could cause the contacts to register the same value.
  • Repair or Replace Faulty Components: If the switch or its associated circuit is found to be defective, undertake necessary repairs or replace the faulty parts to restore proper functionality.
  • Test the Button Functionality: After addressing the mechanical and electrical issues, test the foot pedal lock button to ensure that it can properly toggle between ON and OFF states without conflict.
  • System Reset and Operational Verification: Reset the system to remove any limitations or errors set by the control software. Perform a comprehensive functional test to confirm that the button operates correctly and that the function it controls is fully active.


It is critical to ensure that all control switches and their circuits are regularly maintained and promptly repaired when faults are detected. This helps prevent operational disruptions and maintains the safety and efficiency of the machinery.