John Deere 003842.00 – SSU, SFA, XMC: Front Axle Steering Angle Position Sensor Issue

The vehicle's control system has detected a problem with the sensor responsible for reporting the precise angle of the front wheels. This can manifest as incorrect voltage signals, loss of signal, or data that conflicts with other vehicle sensors, such as the steering wheel position sensor. The sensor's data is crucial for automated guidance systems like AutoTrac and for the proper functioning of the vehicle's electronic stability and steering control.

• 8225R
• 8235R
• 8245R
• 8260R
• 8270R
• 8285R
• 8295R
• 8310R
• 8320R
• 8335R
• 8345R
• 8360R
• 8370R
• 8400R
• 8R 230
• 8R 250
• 8R 280
• 8R 310
• 8R 340
• 8R 370
• 8R 410
• 8310RT
• 8335RT
• 8360RT
• 9360R
• 9410R
• 9420R
• 9460R
• 9470R
• 9510R
• 9520R
• 9560R
• 9570R
• 9620R
• 7200R
• 7210R
• 7215R
• 7230R
• Various sprayers
• S9 Series Combines

1. 1

   Check for related fault codes, as multiple codes are often present (e.g., SSU 523826.10 for steering movement detected without steering wheel motion)

2. 2

   Jack up the front of the tractor and inspect mechanical components for any play in the ball joints or other steering linkage components

3. 3

   Examine the wiring harness and connectors leading to the wheel angle sensor for any signs of damage, such as chafing, corrosion, or loose connections, including poorly crimped wires that can cause a voltage drop as the sensor warms up

4. 4

   Perform a load test on the sensor's wiring circuit to check for excessive voltage drop between the sensor and the SSU controller

5. 5

   Restart the vehicle by cycling the key switch, which can sometimes clear intermittent faults

1. 1

   Address mechanical and wiring issues

   If any play in the steering components or damage to the wiring harness is found, repair these issues first. This may resolve the fault code without needing to replace the sensor.

2. 2

   Replace the sensor if necessary

   If the sensor itself is determined to be faulty, it will need to be replaced. The sensor is typically located on the front axle, often integrated with or near the steering cylinder.

3. 3

   Calibrate the new sensor

   After replacing the sensor or performing any significant steering repairs, recalibrate the wheel angle sensor through the machine's diagnostic menu on the in-cab display (e.g., CommandCenter™). Drive the machine and turn the steering wheel lock-to-lock following on-screen prompts. If calibration fails, re-check for mechanical or wiring issues.