CSM 523801.02 — Single Lever Control Auxiliary Switch Fault

CSM 523801.02 (CSM )

Code: 523801.02



This error code, CSM 523801.02, indicates a fault in the single lever control auxiliary switch due to conflicting outputs. This issue can arise from a malfunctioning switch, wiring issues, or sensor faults.


The function of the single lever control is disabled to prevent incorrect operations.


Inspect Auxiliary Switch:

  • Check the single lever control auxiliary switch for any signs of malfunction or wear. Replace the switch if necessary.

Check Wiring and Connections:

  • Inspect the wiring and connections related to the auxiliary switch for damage, loose connections, or corrosion. Secure and clean all connections to ensure proper electrical contact.

Test Switch Functionality:

  • Use diagnostic tools to test the auxiliary switch and ensure it is functioning correctly without conflicting outputs.

Reset and Test System:

  • After addressing the issue, reset the system and perform tests to ensure the auxiliary switch is operating correctly and the single lever control function is restored.


Regular maintenance and inspection of control switches and associated wiring are essential for preventing faults. Promptly addressing any signs of malfunction helps maintain reliable system operation.

Control Units: John Deere

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