AIC 523923.02 – SCV I Control Lever Switch/Sensor Conflict. John Deere System Notification.

AIC 523923.02 (AIC )

Code: 523923.02



This error code AIC 523923.02 signifies a conflict within the SCV I (Selective Control Valve I) system, specifically between the detent switch of the control lever and the sensor voltage. The issue arises when the potentiometer signal voltage for the E-SCV I control lever is out of the specified range, or there is a mismatch between the status of the control lever switch and the potentiometer’s signal voltage. This discrepancy suggests either a faulty potentiometer, incorrect wiring, or a malfunctioning switch, which could lead to inaccurate control commands.


Due to the detected conflict, the control unit has disabled SCV I functionality to prevent any operational errors or potential damage that could result from incorrect valve actuations based on flawed sensor readings or switch positions.


  • Inspect the SCV I Control Lever and Associated Components: Examine the control lever, detent switch, and potentiometer for any signs of physical damage, wear, or improper alignment that might affect their function.
  • Diagnose Electrical and Sensor Issues: Utilize diagnostic tools to check the electrical connections and measure the potentiometer’s signal voltage. Ensure that the wiring is intact and the sensor is providing accurate readings.
  • Calibrate or Replace Faulty Sensors or Switches: If calibration does not resolve the issue, consider replacing any faulty sensors or switches that contribute to the conflict.
  • Test SCV I Lever Functionality: After repairs or replacements, test the SCV I control lever to ensure that it operates correctly, with the detent switch and potentiometer signals aligning properly under all operating conditions.
  • System Reset and Operational Verification: Reset the control system to clear the fault and restore SCV I functionality. Conduct thorough operational tests to confirm that the issue has been resolved and the SCV I operates as intended.


Regular maintenance and calibration of control systems are essential to ensure the reliability and accuracy of agricultural machinery operations. Addressing sensor and switch conflicts promptly helps maintain operational efficiency and prevents downtime, ensuring the equipment continues to function safely and effectively.