John Deere 001881.13 – HCU / HCC: Draft Pin Sensor Out Of Range

The Hitch Control Unit (HCU) has detected that the voltage signal from the rear hitch draft sensor is outside the expected range, or a successful calibration has failed. This indicates a potential issue with the sensor, its connection to the control module, or a need for system calibration. This fault prevents the proper operation of the tractor's draft control system, which relies on this sensor to detect the load on the three-point hitch and make automatic adjustments.

• 6010
• 6110
• 6120
• 6200
• 6210
• 6215
• 6220
• 6300
• 6310
• 6320
• 6400
• 6405
• 6410
• 6415
• 6420
• 6500
• 6605
• 6615
• 6715
• 6M Series
• 6R Series
• 7130
• 7220
• 7230
• 7320
• 7720
• 7810
• 7820
• 7920
• 7R Series
• 8R Series
• 8130
• 8230
• 8320
• 8330
• 8400
• 8410
• 8430
• 8520
• 8530
• 9230
• 9300
• 9330
• 9430
• 9530
• 9630
• 7M Series
• 4000 Series

1. 1

   Inspect the wiring harness and connectors leading to the draft sensor (often located on the right side, above the drawbar) for damage, chafing, breaks, corrosion, or hydraulic fluid degradation.

2. 2

   Check sensor voltage via diagnostic address HCC 005 with no implement attached (expected range is 1.9 to 2.1 Volts).

3. 3

   Verify sensor functionality by attaching a heavy implement and lifting it; the voltage should decrease by 0.30 volts or more. If it does not change, the sensor may be binding or faulty.

4. 4

   Check for other active HCU/HCC codes, such as sensor supply voltage problems (e.g., HCU 001079.03, HCU 001079.04).

1. 1

   Park and secure tractor

   Park the machine on a level surface, lower all equipment to the ground, stop the engine, and remove the key.

2. 2

   Access and inspect sensor

   Locate the draft sensor above the drawbar, often behind a cover plate. Remove the drawbar if necessary. Clean any dirt or debris packed around the sensor and ensure its plug is securely connected.

3. 3

   Replace faulty sensor

   If the sensor is binding or voltage tests indicate it is faulty, replace the draft sensor. Note that the sensor is often adjustable.

4. 4

   Prepare for hitch calibration

   Warm hydraulic oil above 50°C (122°F) by cycling the hitch. Set engine speed to approximately 1900 RPM. Install a 136–226 kg (300–500 lb) weight on the rear hitch (less if a quick coupler is present). Ensure the transport lock switch is off and no implements are connected.

5. 5

   Perform hitch calibration

   Access HCC Address 020 in technician mode. Follow the on-screen prompts on the CommandCenter to move the hitch control lever to the full raise and lower positions to determine deadbands and limits. Save the calibration when 'EOC' and 'HCAL' are displayed. If the calibration fails, an error message will be displayed indicating a component failure that needs to be addressed before calibration can be successfully completed.