Hitch Control Unit (HCU) Diagnostic Trouble Codes

Hitch Control Unit (HCU) Diagnostic Trouble Codes
Diagnostic Trouble Code Display Solution
HCU 000158.04 Rear Hitch System HCU Switched Supply Voltage Low. Visually inspect around the batteries and alternator for any visual signs of damage or accumulated debris. Have your John Deere dealer repair as soon as possible.
HCU 000168.04 Electrical System HCU Unswitched Supply Voltage Low. Visually inspect around the batteries and alternator for any visual signs of damage or accumulated debris. Check fuse F30. If code still exists, have your John Deere dealer repair as soon as possible.
HCU 000190.02 Rear Hitch System Rear Hitch Calibration Fault/Engine Speed Low. Have your John Deere dealer repair as soon as possible.
HCU 000629.12 Rear Hitch System HCU Control Unit Fault. Have your John Deere dealer repair as soon as possible.
HCU 000630.13 Rear Hitch System Rear Hitch Not Calibrated. Have your John Deere dealer calibrate as soon as possible.
HCU 001079.03
HCU 001079.04		 Rear Hitch System HCU Sensor Supply Voltage Problem. Have your John Deere dealer repair as soon as possible.
HCU 001638.02 Rear Hitch System HCU Calibration Fault/Hydraulic Oil Temperature Low. Have your John Deere dealer repair as soon as possible.
HCU 001873.02
HCU 001873.03
HCU 001873.04		 Rear Hitch System Rear Hitch Position Sensor Circuit Voltage Problem. Have your John Deere dealer repair as soon as possible.
HCU 001873.13 Rear Hitch System HCU Calibration Fault/Rear Hitch Position Sensor Circuit. Have your John Deere dealer calibrate hitch as soon as possible.
HCU 001881.03
HCU 001881.04		 Rear Hitch System Rear Hitch Draft Sensor Circuit Voltage Problem. May have manual switch control. Have your John Deere dealer repair as soon as possible.
HCU 001881.13 Rear Hitch System HCU Calibration Fault/Rear Hitch Draft Sensor Circuit. May still have manual switch control. Have your John Deere dealer calibrate hitch as soon as possible.
HCU 002003.09 Rear Hitch System Vehicle Speed Update Fault. Have your John Deere dealer repair as soon as possible.
HCU 002005.09 Communication System ACU Message Missing. Have your John Deere dealer repair as soon as possible.
HCU 002602.18 Hydraulic System Hydraulic Oil Level Low. Check hydraulic oil level. If code still exists, have your John Deere dealer repair as soon as possible.
HCU 521000.02
HCU 521000.31		 Rear Hitch System Rear Hitch External Switch Circuit Fault. Have your John Deere dealer repair as soon as possible.
HCU 521001.02 Rear Hitch System HCU Calibration Fault/Rear Hitch Pressure Valve Gain. Have your John Deere dealer calibrate hitch as soon as possible.
HCU 521001.05
HCU 521001.06		 Rear Hitch System Rear Hitch Raise Valve Fault. Hitch will not raise. Have your John Deere dealer repair as soon as possible.
HCU 521001.07
HCU 521001.11
HCU 521001.13		 Rear Hitch System Hitch Raise Valve Fault. Raise valve not calibrated. Hitch will work in manual mode. Have your John Deere dealer calibrate as soon as possible.
HCU 521002.05
HCU 521002.06		 Rear Hitch System Rear Hitch Lower Valve Fault. Hitch will not lower. Have your John Deere dealer repair as soon as possible.

 

OURX935,0000563 -19-23AUG07-1/2

Hitch Control Unit (HCU) Diagnostic Trouble Codes
Diagnostic Trouble Code Display Solution
HCU 521002.07
HCU 521002.11
HCU 521002.13		 Rear Hitch System Rear Hitch Return Valve Fault. Return valve not calibrated. Hitch will work in manual mode. Have your John Deere dealer calibrate as soon as possible.
HCU 523652.02 Hydraulic System Wire Connector Fault. Have your John Deere dealer repair as soon as possible.
HCU 523788.02
HCU 523788.14		 Rear Hitch System Hydraulic Option Configuration Problem. Hook up last used implement and cycle key switch ON and OFF to reset.
HCU 523910.02 Rear Hitch System HCU Control Unit Fault. May not have all hitch features. Have your John Deere dealer calibrate as soon as possible.
HCU 523952.31 Rear Hitch Disabled Rear Hitch Disabled/HCU Configuration. Have your John Deere dealer repair as soon as possible.
HCU 524016.04 Rear Hitch System HCU Valve Supply Voltage Low/Rear Hitch Solenoids. Visually inspect around the batteries and alternator for any visual signs of damage or accumulated debris. Check fuse F30. Have your John Deere dealer repair as soon as possible.
HCU 524212.19
HCU 524212.31		 Hydraulic System Rear Hitch Control Lever Fault Message Received. Have your John Deere dealer repair as soon as possible.

 

OURX935,0000563 -19-23AUG07-2/2