EPC 522506.31 – INFORMATION FOR OPERATOR: Neutral Switch Closed During StartUp

EPC 522506.31 (EPC )

Code: 522506.31



This error code, EPC 522506.31, is generated when the EPC control unit detects that the neutral switch is closed during startup (ignition ON). This indicates that the neutral switch is incorrectly positioned or there is an issue with its circuit.


When this error is detected, the control system may flag the neutral switch status, potentially affecting the startup process and vehicle operation.


Inspect Neutral Switch Position:

  • Check the position of the neutral switch to ensure it is correctly set to the open position when the ignition is turned ON.

Verify Wiring and Connections:

  • Inspect the wiring and connections to the neutral switch for any signs of damage, loose connections, or corrosion. Repair or replace as necessary.

Test Neutral Switch:

  • Use diagnostic tools to test the neutral switch for proper functionality. Replace the switch if it is found to be faulty.

Check for Mechanical Issues:

  • Ensure there are no mechanical issues with the switch or its mounting that could affect its operation.

Reset and Test System:

  • After addressing the issues, reset the system and test the startup process to ensure the neutral switch correctly indicates the open position during ignition ON.


Maintaining the proper function and positioning of the neutral switch is crucial for safe and reliable vehicle startup. Regular inspections and maintenance help ensure accurate switch operation.

Control Units: John Deere

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