John Deere 001873.13 – HCU or HCC: Rear Hitch Calibration Issue

This fault code indicates a calibration issue related to the rear hitch position sensor circuit. It is triggered when the system detects that a calibration attempt has failed, or the existing calibration data is invalid or out of range. This prevents the proper operation of the hitch mechanism and is typically caused by procedural errors during calibration (such as cold hydraulic oil), or a physical problem within the rear hitch position sensor circuit.

• 5075M
• 5085M
• 5090M
• 5090R
• 5095M
• 5100M
• 5100MH
• 5100ML
• 5100R
• 5105M
• 5105MH
• 5105ML
• 5115M
• 5115ML
• 5115R
• 5115RH
• 5120M
• 5120ML
• 5125M
• 5125ML
• 5125R
• 5130M
• 5130ML
• 6J-1704
• 6J-1904
• 6M 95
• 6M 105
• 6M 110
• 6M 115
• 6M 120
• 6M 125
• 6M 130
• 6M 140
• 6M 145
• 6M 150
• 6M 155
• 6M 165
• 6M 175
• 6M 180
• 6M 185
• 6M 195
• 6M 200
• 6M 210
• 6M 220
• 6M 230
• 6M 240
• 6M 250
• 6M-1654
• 6M-1854
• 6M-2104
• 6MH 155
• 6R 110
• 6R 120
• 6R 130
• 6R 140
• 6R 145
• 6R 150
• 6R 155
• 6R 165
• 6R 175
• 6R 185
• 6R 195
• 6R 215
• 6R 230
• 6R 250
• 6R 2304
• 6090M
• 6100J
• 6100M
• 6105J
• 6110J
• 6110M
• 6115J
• 6120M
• 6125J
• 6125M
• 6330
• 6510
• 6610
• 6810
• 6910
• 6910S
• 7220
• 7320
• 7420
• 7520
• 7630
• 7730
• 7830
• 7930
• 7R Series
• 8R Series
• 8130
• 9120
• 9220
• 9320
• 9420
• 9520
• 9230
• 9330
• 9430
• 9530
• 9630

1. 1

   Check the tractor's diagnostic display for any other active fault codes related to sensor voltage or communication to help pinpoint the root cause.

2. 2

   Verify hydraulic oil temperature is above 50°C (122°F). Cold oil is a common cause for calibration failure. Cycle the hitch to warm the oil if necessary.

3. 3

   Ensure engine speed is at the required RPM (typically 1800 or 1900 RPM) for calibration.

4. 4

   Visually inspect the wiring harness and connectors for the rear hitch position sensor and draft sensor for damage, corrosion, or loose connections.

5. 5

   Test the hitch position sensor circuit by observing voltage changes as the hitch is moved.

6. 6

   Unplug the draft sensor to see if the position sensor starts working, which may indicate a shared wiring issue.

7. 7

   Clear fault codes and attempt to operate the hitch to see if the code returns.

1. 1

   Prepare for calibration

   Ensure the hydraulic oil is warmed to at least 50°C (122°F). Set the engine speed to the required RPM (typically 1900 RPM). Ensure the transport lock switch is in the 'OFF' position. Remove any implements from the hitch (note: a small amount of weight, 136-226 kg or 300-500 lbs, may be required for some models).

2. 2

   Initiate calibration mode

   Navigate to the hitch calibration menu on the tractor's display (CommandCenter), typically found under a 'Calibrations' or 'Service' menu.

3. 3

   Calibrate hitch movement

   Follow the system prompts to move the hitch control lever to the full raise and full lower positions. Hold the lever until the movement is complete and the value is stored. The system will determine the deadbands and command limits for the raise and lower valves.

4. 4

   Calibrate position sensor

   Allow the calibration process to record the voltage from the position sensor at the fully raised and fully lowered positions.

5. 5

   Save and complete calibration

   Once all steps are completed, prompt the system to save the new calibration data. After saving, turn the key to the 'off' position and wait for the system to power down completely to ensure the new calibration is stored.

6. 6

   Verify operation

   Restart the tractor and operate the hitch through its full range of motion to ensure it is functioning correctly and that the fault code does not reappear.

7. 7

   Replace position sensor

   If the calibration fails or the fault code returns after verifying wiring and temperatures, replace the rear hitch position sensor. A new calibration must be performed after replacement.