John Deere 523842.13 – HCC / HCU: Rear Hitch Load/Depth Control Fault/Out of Calibration

This code is logged when the control module detects that the signal voltage from the Rear Hitch Load/Depth Control Potentiometer (Sensitivity Potentiometer) is outside of its expected operational range, or the sensor has lost its calibration limits, which disables or limits the electronic rear hitch control functions.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 5090M
• 5100M
• 5100MH
• 5100ML
• 5115M
• 5085M
• 5115ML
• 5075M
• 6090MC
• 6100MC
• 6110MC
• 6090RC
• 6100RC
• 6110RC

1. 1

   Perform a voltage sweep test on the Rear Hitch Load/Depth Control Potentiometer (0.5V to 1.5V full CCW, 3.5V to 4.5V full CW)

2. 2

   Check for shorts to power (voltage above 4.75V) or open circuits/shorts to ground (voltage below 0.25V)

3. 3

   Inspect the wiring harness and connectors between the potentiometer and the HCU/HCC for corrosion, bent pins, or chafed wires

1. 1

   Power Down

   Turn off the tractor, remove the key, and relieve any hydraulic pressure.

2. 2

   Inspect the Connector

   Locate the Rear Hitch Load/Depth Control Potentiometer on the right-hand control console. Disconnect the sensor plug and inspect the terminals. Clean any debris or corrosion with electrical contact cleaner.

3. 3

   Test the Harness

   Perform a continuity test on the signal, ground, and 5V reference wires between the sensor connector and the HCU/HCC module. Repair any damaged wiring.

4. 4

   Replace the Sensor

   If the wiring is intact but the sensor fails the voltage sweep test (dead spots or out-of-range voltage), remove the retaining hardware and replace the potentiometer.

5. 5

   Perform Hitch Calibration

   Whether you repaired a wire or replaced the sensor, you must perform the Rear Hitch Calibration procedure via the tractor's CommandCenter or diagnostic tool so the HCU/HCC can relearn the new minimum and maximum voltage limits.

6. 6

   Clear Codes

   Clear the 523842.13 DTC and verify that the rear hitch operates smoothly through its full range of motion.