John Deere 522387.07 – SSU (Steering System Control Unit) or XSC (Steering Controller): No Movement Of Front Axle When Turn Was Requested

This code is generated when the control software commands an electro-hydraulic steering movement, but fails to detect a corresponding physical movement signal from the Wheel Angle Sensor (WAS), or the received signal is too low. This typically disables AutoTrac and limits steering responsiveness.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 7830
• 7430 Premium
• 8430
• 8235R
• 8260R
• 8320R
• 9230
• 9330
• 9430
• 9530
• 9630
• 4930
• 4730

1. 1

   Inspect the Wheel Angle Sensor (WAS) for physical damage, wear, or heavy debris buildup that could impede its movement, and ensure it is securely mounted and properly connected.

2. 2

   Inspect the wiring harness and connectors associated with the WAS for damage, corrosion, or loose pins (broken wires near the sensor are a common cause).

3. 3

   Use a John Deere diagnostic tool (Service ADVISOR) to monitor the signal from the wheel angle sensor in real-time and verify if the sensor voltage/signal changes correctly when the steering wheel is turned manually.

4. 4

   If the sensor and wiring check out, evaluate the Steering Valve to see if the AutoTrac Proportional Valve Electronic (PVE) is failing to physically actuate the steering cylinder when commanded.

1. 1

   Clean and Secure

   Clear any mud or debris from the front axle steering sensor linkage. Re-seat the sensor connector to ensure a good connection.

2. 2

   Repair Wiring

   If the diagnostic checks reveal a broken wire or corroded connector in the WAS harness, repair or replace the affected harness section. Clear the code and test.

3. 3

   Replace the Wheel Angle Sensor

   If the sensor signal is dead, erratic, or out of range, replace the Wheel Angle Sensor. After replacement, a steering calibration procedure must be performed via the cab display or Service ADVISOR.

4. 4

   Replace the PVE (Electro-Hydraulic Valve Electronic Section)

   If the wiring is intact and the WAS is functioning properly, the AutoTrac Proportional Valve Electronic (PVE) is likely failing intermittently. Replace just the electronic control portion (PVE).

5. 5

   Update Software

   Check for and install any available firmware updates for the SSU and WAS to address potential signal processing bugs.