AIC 523776.02 – Transport Lock Switch Circuit Fault in Multi-Function Lever. John Deere System Alert.

AIC 523776.02 (AIC )

Code: 523776.02



The error code AIC 523776.02 indicates a malfunction in the transport lock switch of the multi-function lever, with conflicting outputs being reported. This condition suggests an electrical inconsistency, such as a short circuit, wiring fault, or a component failure within the switch itself. The transport lock switch is crucial for ensuring the lever is locked during non-operational transport modes to prevent unintended engagement.


Due to the detected fault in the switch’s outputs, the control unit has disabled the functionality of the multi-function lever’s transport lock feature to prevent any unsafe conditions that might arise from unreliable switch operation.


  • Inspect the Multi-Function Lever and Transport Lock Switch: Examine the lever and switch for any visible damage, wear, or incorrect installation that could cause the conflicting outputs.
  • Test Electrical Connections and Switch Functionality: Use diagnostic tools to check the electrical pathways and the operational integrity of the transport lock switch. Look for any abnormalities like shorts or open circuits that could interfere with normal function.
  • Repair or Replace Faulty Wiring or Components: If any issues are identified in the wiring or switch components, repair or replace them to ensure reliable functionality. Make sure all connections are secure and correctly configured.
  • Calibrate the Transport Lock Switch: After repairing or replacing necessary parts, recalibrate the switch to ensure it accurately detects and responds to the lever’s position.
  • System Reset and Functional Testing: Reset the system to remove any error states. Perform thorough testing to verify that the transport lock function of the multi-function lever is fully operational and no longer exhibits any conflicting outputs.


Regular maintenance and immediate attention to faults in critical control switches like the transport lock are essential to maintain the operational safety and reliability of heavy machinery. Ensuring that all components are in good working order and properly calibrated helps prevent accidental operations and enhances the overall safety of the equipment.