SSU 523795.12 – Y49 Steering Control Valve, Error Identification

SSU 523795.12 (SSU )

Code: 523795.12



This diagnostic trouble code (DTC), SSU 523795.12, is triggered when the steering control valve (Y49) sends error information to the SSU control unit. The error can occur for various reasons, including a short in the 5-volt power supply to the steering control valve or an open circuit.


When this error is detected, the steering system may not function correctly, potentially leading to issues with steering control and vehicle safety.


Inspect Power Supply:

  • Check the 5-volt power supply to the steering control valve (Y49) for shorts.
  • Ensure that the power supply voltage is stable and within the correct range.

Verify Valve Connections:

  • Inspect the wiring and connectors related to the steering control valve for signs of damage, loose connections, or corrosion.
  • Ensure all connections are secure and free from contaminants.

Check for Open Circuits:

  • Use diagnostic tools to check for continuity in the circuit to ensure there are no open connections.

Update Software:

  • Ensure that the SSU software is up-to-date. Apply any available firmware updates to improve system performance and error detection.

Replace Faulty Components:

  • If the steering control valve or related components 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 power supply and connection issues.
  • Ensuring the electrical system is properly regulated can avoid interruptions in valve operation.

Control Units: John Deere

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