SSU 523795.11 – Electro-Hydraulic Steering Valve Deadband Inconsistent

SSU 523795.11 (SSU )

Code: 523795.11



This diagnostic trouble code (DTC), SSU 523795.11, is triggered when the Steering System Control Unit (SSU) detects that the electro-hydraulic steering valve’s left and right deadband values differ significantly during calibration (greater than 4 counts difference). This indicates an inconsistency in the valve’s operation.


When this error is detected, the steering system may not respond accurately, leading to potential issues with vehicle control and safety.


Inspect Steering Valve:

  • Check the electro-hydraulic steering valve for proper operation.
  • Ensure the valve is functioning consistently in both directions.

Perform Calibration:

  • Recalibrate the steering system to ensure accurate deadband values for both left and right directions.
  • Follow the manufacturer’s guidelines for the calibration process.

Update Software:

  • Ensure that the SSU and related system software are up-to-date. Apply any available firmware updates to improve system performance and consistency.

Verify Sensor Signals:

  • Ensure that the sensors providing feedback to the SSU are functioning properly and providing accurate data.
  • Inspect the wiring and connectors related to these sensors for signs of damage, loose connections, or corrosion.

Replace Faulty Components:

  • If the steering valve or related sensors 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 steering system components can help prevent deadband inconsistencies.
  • Ensuring accurate calibration and proper sensor functionality is crucial for reliable steering performance.

Control Units: John Deere

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