RPT 523908.09 – Incorrect CAN Bus Message, Information from OIC Control Software

RPT 523908.09 (RPT )

Code: 523908.09



This diagnostic trouble code, RPT 523908.09, is generated when the CAN bus message from the OIC (Operator Interface Control) control software about the rear PTO remote control switch value is not updated regularly via the CAN bus. The OIC diagnostic trouble codes take priority.


When this error is detected, the functionality of the RPT control software is significantly limited or entirely non-functional.


Inspect CAN Bus Wiring and Connections:

  • Check all wiring and connections associated with the CAN bus for signs of damage, corrosion, or loose connections.
  • Secure any loose wires and repair or replace damaged components as necessary.

Verify CAN Bus Communication:

  • Use diagnostic tools to test the CAN bus communication for any irregularities or failures.
  • Ensure that all CAN messages from the OIC control software are being correctly transmitted and received by the RPT control software.

Update Control Software:

  • Ensure that both the OIC and RPT control software are updated to the latest versions.
  • Install any available patches or updates that address CAN bus communication issues.

Consult Technical Support:

  • If the problem persists after initial troubleshooting, consult with technical support or the equipment manufacturer for further assistance.
  • Provide detailed information about the issue, including any error logs or diagnostic reports.

Monitor System Performance:

  • After performing the recommended actions, monitor the system for any recurrence of the issue.
  • Keep detailed records of any further errors or irregularities to assist in ongoing troubleshooting.


Regular updates and maintenance of the CAN bus system and control software can help prevent communication issues. Ensuring that all components are functioning correctly and that the software is up-to-date is crucial for maintaining reliable operation.

Control Units: John Deere

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