John Deere 1881.04 – HCC / HCU: Rear Hitch Draft Sensor Circuit Voltage Low

The voltage signal from the rear hitch draft sensor has dropped below 0.20 volts, causing degraded hitch control function and potentially a stuck or unresponsive 3-point hitch.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 5090M
• 5100M
• 5100MH
• 5100ML
• 5115M
• 5065M
• 5075M
• 5085M
• 5115ML
• 5095M
• 5095MH
• 5105M
• 5015ML
• 5M Series
• 5G Series
• 5075GV
• 5090GV
• 5075GN
• 5R Series
• 6M Series
• 6R Series
• 6150R
• 7720
• 7810
• 7820
• 7920
• 7185J
• 7205J
• 7210J
• 8130
• 8230
• 8330
• 8430
• 8530
• 9230
• 9330
• 9430
• 9530
• 9630

1. 1

   Restart the tractor's engine to verify if the active service code reappears, as a system reset can sometimes correct communication messages

2. 2

   Ensure there is weight on the hitch and that it is not physically bound up (a stuck hitch can trigger draft sensor faults until nudged loose)

3. 3

   Inspect the wiring harness and connectors associated with the Rear Hitch Draft Sensor for physical damage, loose connections, or corrosion

4. 4

   Measure the sensor's output voltage with a multimeter to ensure it is reading above 0.20 volts

1. 1

   Repair Wiring

   If the diagnostic voltage test reveals a short or broken wire in the harness leading to the draft pin, repair or replace the affected wiring.

2. 2

   Replace the Sensor

   If the wiring is intact but the voltage remains below 0.20V, the draft sensor itself is defective and must be replaced.

3. 3

   Lubricate

   During reassembly, lubricate the rear hitch draft sensor using John Deere SD Polyurea grease (or the grease specified in your specific operator's manual).

4. 4

   Calibrate the HCC/HCU

   After replacing the sensor, you must perform a proper calibration of the Rear Hitch Draft Sensor according to the manufacturer's instructions via the tractor's CommandCenter display or dealer diagnostic tool.