John Deere 521001.13 – Hitch Control Unit (HCC / HCU): Rear Hitch Control Valve Raise Position Out Of Range Calibration

The control module has detected that the rear hitch raise valve/solenoid has lost its calibration parameters or the calibration values are out of the acceptable range. When this code is active, the automatic hitch raise function is disabled, though the hitch will typically still work in manual mode.

• 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
• 5085E
• 5090E
• 5100E
• 5225
• 5325
• 5425
• 5525
• 5625
• 5725
• 8130
• 8230
• 8330
• 8430
• 8530
• 8245R through 8400R
• 9230
• 9330
• 9430
• 9530
• 9630
• 9470RT
• 9520RT
• 9570RT

1. 1

   Verify Manual Operation: Confirm if the hitch still operates via the manual switch. If it does, the issue is strictly calibration or sensor-related rather than a complete hydraulic failure.

2. 2

   Check System Voltage: Visually inspect the batteries and alternator for damage or debris. Low switched or unswitched supply voltage to the HCC/HCU can cause the module to lose calibration data.

3. 3

   Check Hydraulic Oil Level: Ensure the hydraulic oil is at the proper level, as low fluid can trigger related hydraulic codes that interrupt calibration.

4. 4

   Inspect Wiring and Connectors: Check the wiring harness and connectors going to the Rear Hitch Raise Valve for signs of damage, loose connections, or corrosion.

5. 5

   Check for Accompanying Codes: Look for other active codes (e.g., Engine Speed Low, Sensor Supply Voltage Low) that might be preventing the calibration routine from completing successfully.

1. 1

   Perform Calibration

   Using the tractor's monitor or John Deere Service ADVISOR, initiate the Rear Hitch Raise Valve calibration procedure.

2. 2

   Execute the Routine

   Follow the on-screen prompts to calibrate the raise valve's maximum current and deadband settings.

3. 3

   Clear Codes

   Once calibration is complete, clear the stored diagnostic trouble codes and test the automatic hitch raise function.

4. 4

   Inspect/Replace Valve

   If the calibration fails to complete or the code immediately returns, the Rear Hitch Raise Valve (solenoid) is likely faulty and must be replaced.

5. 5

   Module Replacement

   If a new valve and verified wiring still result in a calibration failure, the Hitch Control Unit (HCC/HCU) itself may have an internal fault and require replacement.