John Deere 01 – LC1: Folding Auger Position Calibration Voltage Too Low

This fault indicates that the voltage signal from the folding auger's position sensor is below the acceptable minimum threshold during calibration. Specifically, when the auger is in the folded position, the sensor's output voltage to the control module is less than 0.50 VDC. This low voltage prevents the system from accurately verifying the auger's position.

• 9570 STS
• 9670 STS
• 9770 STS
• 9870 STS
• S660
• S670
• S680
• S690

1. 1

   Inspect the wiring harness between the folding auger position sensor and the LC1 control unit for any visible damage, such as chafing, corrosion, or pinch points.

2. 2

   Ensure the harness connector is securely plugged into the sensor.

3. 3

   Visually inspect the rotary position sensor for any physical damage or incorrect mounting.

4. 4

   Ensure the associated actuator and linkage are not damaged, bent, or binding, and that they allow the sensor to move through its full range of motion.

5. 5

   Attempt to run the unloading auger calibration procedure again to see if the fault clears after visual inspection.

1. 1

   Isolate and Test the Sensor

   If wiring and mechanical inspections pass, the sensor itself is the primary suspect. A technician would typically test the sensor's voltage output.

2. 2

   Check for Voltage Supply

   Verify that the sensor is receiving the correct supply voltage from the control unit (typically 5 or 8 VDC for position sensors).

3. 3

   Test Signal Voltage

   Manually move the auger and observe the signal voltage from the sensor. If the voltage remains below 0.5 VDC regardless of the auger's position, or if it does not change smoothly, the sensor is likely faulty.

4. 4

   Replace Faulty Component

   If the sensor is determined to be faulty, it should be replaced. If the wiring is damaged, it should be repaired or replaced.

5. 5

   Calibrate

   After replacing the sensor or repairing the wiring, a new 'Unloading Auger Engage Calibration' must be performed. This procedure allows the control unit to learn the voltage values for the folded and unfolded positions.