AIC 524105.02 – SCV II Control Lever Switch/Sensor Conflict. John Deere System Notification.

AIC 524105.02 (AIC )

Code: 524105.02



The error code AIC 524105.02 indicates a conflict within the SCV II (Selective Control Valve II) system, where the detent switch on the SCV II control lever does not align with the sensor voltage readings from the E-SCV II sensor. This discrepancy means that the physical position of the control lever is not accurately reflected by the sensor’s electrical signals, potentially due to issues with the switch, sensor, or wiring. Such a conflict can lead to improper operation of hydraulic functions controlled by SCV II.


As a result of this detected conflict, the control unit has disabled SCV II to prevent incorrect hydraulic actions that could result from this discrepancy. This measure ensures that the hydraulic system remains safe and operational errors are minimized until the issue is resolved.


  • Inspect the SCV II Control Lever and Detent Switch: Examine the control lever and its detent switch for any signs of physical wear, damage, or misalignment that could affect its proper function. Ensure that the lever moves freely and engages properly in all intended positions.
  • Test the E-SCV II Sensor and Electrical Connections: Use diagnostic tools to assess the sensor and its electrical connections. Verify that the voltage outputs correspond to the lever’s positions and identify any irregularities that might be contributing to the conflict.
  • Repair or Replace Faulty Components: If the sensor, switch, or wiring is found to be faulty, proceed with necessary repairs or replacements. Make sure all components are correctly installed and function as expected.
  • Calibrate the SCV II System: After any necessary repairs, recalibrate the system to ensure the mechanical positions of the lever accurately match the sensor outputs.
  • System Reset and Functional Testing: Reset the control system to clear any fault states. Perform a comprehensive test to ensure that SCV II is functioning correctly and that the lever and sensor are in sync, confirming the resolution of the issue.


Regular maintenance of SCV systems and their components is crucial to ensure the accurate operation of machinery. Frequent checks and timely resolution of discrepancies between mechanical movements and sensor readings are essential to maintain operational efficiency and safety. Proper synchronization between control levers and their associated sensors is vital for precise control over hydraulic functions.