AIC 524104.02 – SCV III Control Lever Switch/Sensor Conflict. John Deere System Notification.

AIC 524104.02 (AIC )

Code: 524104.02



This error code, AIC 524104.02, indicates a malfunction in the SCV III (Selective Control Valve III) system, where there is a discrepancy between the position of the control lever’s detent switch and the voltage readings from the E-SCV III sensor. The mismatch suggests that the physical position of the control lever does not align with the electrical feedback provided by the sensor, possibly due to issues with the switch, sensor, or wiring. This conflict can affect the precise operation of the SCV III functionalities.


The control unit has disabled SCV IV, potentially due to a typographical error in the system’s response setup, as it is SCV III that is directly involved in the reported issue. This action is likely a safety precaution to prevent improper functioning of related SCV systems.


  • Inspect the SCV III Control Lever and Associated Components: Examine the control lever, particularly its detent switch, for signs of wear, damage, or misalignment. Ensure that the lever functions smoothly and correctly aligns with intended positions.
  • Diagnose Sensor and Wiring Issues: Use diagnostic tools to measure and verify the voltage outputs from the E-SCV III sensor. Check the wiring for continuity, shorts, and proper connections that correspond accurately to lever movements.
  • Repair or Replace Faulty Elements: If any issues are identified with the sensor, switch, or wiring, carry out necessary repairs or replacements to ensure the integrity and functionality of the SCV III system.
  • Calibrate the SCV III System: After making any repairs, recalibrate the system to ensure that sensor readings and lever positions are correctly synchronized.
  • System Reset and Operational Verification: Reset the control system to clear any fault states and conduct extensive testing to confirm the SCV III and, if applicable, SCV IV are operating properly and the issue has been resolved.


Ensuring that control levers and their sensors are in proper working order is crucial for the reliable operation of hydraulic systems in heavy machinery. Regular checks and maintenance can prevent issues that lead to operational inefficiencies or safety hazards. It is also important to ensure that system responses are accurately programmed to address the specific components involved in any detected faults.