John Deere 1881.13 – HCC (Hitch Control Module) / HCU (Hitch Control Unit): Draft Pin Sensor Out Of Range / HCU Calibration Fault / Rear Hitch Draft Sensor Circuit

The control module is receiving a signal voltage from the rear hitch draft pin sensor that falls outside the normal operating parameters, or there is a calibration error preventing the system from accurately reading the draft load on the rear 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
• 7720
• 7820
• 7920
• 8235R
• 8260R
• 8285R
• 8310R
• 8335R
• 8360R
• 9230
• 9330
• 9430
• 9530
• 9630

1. 1

   System Reset: Restart the engine to verify if the active Service Code reappears. Sometimes the code can be corrected by resetting the communication messages when the tractor is restarted.

2. 2

   Clear the Display: Acknowledge the alert and clear the display by pressing the select switch on the CommandCenter. If it returns to normal mode, monitor to see if the code reappears.

3. 3

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

4. 4

   Voltage Test: Measure the sensor's output voltage to ensure it is within the specified range. Check for manual switch control interference.

1. 1

   Disconnect Power

   Turn off the tractor and disconnect the battery to ensure safety while working on the electrical system.

2. 2

   Access the Sensor

   Locate the faulty draft pin sensor on the rear hitch assembly (refer to your specific model's diagram, as some models have both left and right draft pin sensors).

3. 3

   Remove the Faulty Sensor

   Disconnect the wiring harness from the sensor. Remove the retaining hardware and extract the draft pin sensor from the hitch linkage.

4. 4

   Install the New Sensor

   Insert the replacement draft pin sensor.

5. 5

   Lubricate

   Lubricate the rear hitch draft sensor using John Deere™ SD Polyurea grease (or an equivalent specified in your Operator's Manual).

6. 6

   Reconnect

   Reattach the wiring harness securely. Reconnect the battery.

7. 7

   Recalibrate the Hitch

   Crucial Step: Because the code specifically mentions an "HCU Calibration Fault," you must perform a proper calibration of the Rear Hitch Draft Sensor via the CommandCenter or John Deere Service ADVISOR tool according to the manufacturer's instructions.