John Deere 1535 – HCU (E01 / LC1): Right Stubble Height Sensor Voltage Too Low

The Right Stubble Height Sensor is reporting a voltage that is below the acceptable minimum threshold of 0.5 VDC. This condition indicates a fault with the sensor itself, a short circuit to ground in the signal wire, or an issue with the 5V reference power supply circuit provided by the Header Control Unit.

• 9540 WTS
• 9560 WTS
• 9580 WTS
• 9640 WTS
• 9660 WTS
• 9680 WTS
• 9780 CTS
• S670
• S680
• 9560 STS
• 9670 STS
• 9770 STS

1. 1

   Access the combine's diagnostic menu to view the live voltage reading from the right header height sensor (normal is 0.5 to 4.5 VDC)

2. 2

   Inspect the wiring harness and connectors leading to the right stubble height sensor and Header Control Unit for breaks, chafing, or corrosion

3. 3

   Check for a short circuit to ground in the sensor's signal wire

4. 4

   Check the 5V reference power supply from the Header Control Unit (look for accompanying sensor supply voltage fault codes)

5. 5

   Attempt a header height calibration to rule out software or calibration issues

1. 1

   Access the sensor

   Locate the right stubble height sensor on the combine header. The exact position varies depending on the header model.

2. 2

   Test sensor power and ground

   Disconnect the sensor from the harness. Using a multimeter, check for 5V power and a good ground at the harness connector coming from the combine. If missing, the wiring harness or Header Control Unit is likely at fault.

3. 3

   Replace the sensor

   If 5V power and ground are present but the sensor voltage remains below 0.5 VDC, replace the faulty right stubble height sensor.

4. 4

   Clear fault codes

   After completing the repair, use the combine's diagnostic display to clear the diagnostic trouble codes from the Header Control Unit.

5. 5

   Calibrate the system

   Perform a full header height calibration procedure as outlined in the combine's operator's manual to ensure the new sensor provides accurate readings.