ASU 524012.04 – Active Seat Position Sensor Circuit Voltage Low. John Deere System Advisory.

ASU 524012.04 (ASU )

Code: 524012.04



Error code ASU 524012.04 is reported when the Active Seat Unit (ASU) in John Deere machinery detects that the voltage in the seat position sensor circuit is below 0.5 volts. This low voltage issue may be indicative of insufficient power supply, poor electrical connections, or a failing sensor, affecting the accurate detection and adjustment of the seat’s position.


The seat is disabled while this code is active to prevent any unsafe or incorrect adjustments that could result from unreliable sensor readings.


  • Inspect Seat Position Sensor and Electrical Connections: Examine the seat position sensor and its electrical connections for signs of wear, corrosion, or loose connections that could result in low voltage.
  • Test Voltage Levels: Use a multimeter to verify the voltage levels in the sensor circuit to pinpoint the source of the low voltage.
  • Replace or Repair Faulty Components: If the sensor or any associated wiring is found to be defective, replace or repair these components to restore proper voltage levels.
  • Ensure All Wiring is Secure: Double-check that all wiring is securely connected and free from damage or corrosion that could impede voltage flow.
  • Recalibrate the Sensor: After making any repairs or replacements, recalibrate the seat position sensor to ensure it functions accurately.
  • System Reset and Operational Testing: Reset the ASU system to clear the error code and perform operational testing to confirm the sensor now properly detects seat adjustments.


Maintaining the electrical integrity of the seat position sensor circuit is essential for ensuring the active seat’s performance and safety. Regular diagnostic checks and timely maintenance can help mitigate potential issues before they escalate, ensuring continued comfort and safety for the operator.