AIC 523953.04 – Low Voltage in Speed Control Lever Sensor. John Deere System Notification.

AIC 523953.04 (AIC )

Code: 523953.04



This error code, AIC 523953.04, alerts to a low voltage condition in the speed control lever sensor circuit, relevant to systems such as AutoPowr™, IVT™, or CommandQuad™. The voltage detected is below the normal operational range, suggesting a potential short to ground or a fault in the wiring harness, such as damaged wires or poor connections, which could impair the accurate reading and functionality of the speed control lever.


The control unit has automatically commanded the transmission to shift to PARK in response to this voltage anomaly. This action is taken to prevent any unintended or unsafe movements of the vehicle that might occur due to erroneous sensor inputs from the compromised speed control lever.


  • Inspect Wiring and Electrical Connections: Thoroughly examine the wiring harness associated with the speed control lever sensor. Look for any signs of damage, wear, or corrosion that might be causing the low voltage issue.
  • Diagnose the Sensor Circuit: Use diagnostic equipment to check for continuity and resistance in the sensor circuit. Identify any points of failure or short circuits that could be contributing to the voltage drop.
  • Repair or Replace Faulty Wiring: Address any identified faults in the wiring or connections. Replace damaged wires or connectors as necessary to ensure stable and correct voltage levels.
  • Calibrate the Speed Control Lever Sensor: Once any necessary repairs have been made, recalibrate the sensor to ensure it accurately reflects the position of the speed control lever.
  • System Reset and Functional Testing: Reset the control system to clear any fault states. Conduct a comprehensive test to ensure the speed control lever is functioning properly, responding accurately to inputs, and that the vehicle can safely operate in all intended modes.


Regular maintenance of sensor systems and electrical circuits is crucial for the optimal performance of advanced transmission systems like AutoPowr™, IVT™, and CommandQuad™. Preventative measures and timely repairs can mitigate the risk of operational disruptions and extend the lifespan and reliability of the equipment. Maintaining accurate sensor readings and ensuring electrical integrity are key to the safe operation of these sophisticated machinery systems.