SSU 522394.09 – Incorrect CAN BUS Message, Information from Terrain Compensation Module (TCM)

SSU 522394.09 (SSU )

Code: 522394.09



This diagnostic trouble code (DTC), SSU 522394.09, is generated when the information from the Terrain Compensation Module (TCM) integrated in the StarFire ITC receiver is not recognized on the CAN BUS after four attempts. This indicates a problem in the CAN BUS communication or loose connectors.


When this error is detected, the equipment may not correctly process terrain compensation data, leading to potential issues with vehicle guidance and operation.


Verify CAN BUS Communication:

  • Inspect the CAN BUS wiring and connectors for any signs of damage, loose connections, or corrosion.
  • Use diagnostic tools to check for continuity and proper voltage levels in the CAN BUS lines.

Check StarFire ITC Receiver:

  • Ensure that the StarFire ITC receiver, which integrates the TCM, is functioning properly and transmitting accurate data.
  • Check for any firmware updates for the StarFire ITC receiver and apply them as needed.

Update Software:

  • Ensure that all related system software, including that of the CAN BUS and TCM, is up-to-date.

Replace Faulty Components:

  • If the StarFire ITC receiver or any components within the CAN BUS network are found to be defective, replace them with new, genuine parts.

Consult Technical Support:

  • If the error persists after performing the above steps, consult technical support or the manufacturer for further assistance.


  • Regular maintenance and inspection of the CAN BUS wiring and connected components can help prevent communication issues.
  • Keeping the system firmware up-to-date ensures compatibility and reliability of the vehicle’s communication systems.

Control Units: John Deere

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