| Armrest Control Unit (ACU) Diagnostic Trouble Codes |
| Diagnostic Trouble Code |
Display |
Solution |
| ACU 000158.04 |
Rear PTO system |
ACU 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. |
| ACU 000177.17 |
Transmission oil temperature |
Engine Speed Limited Due to Cold Oil. Slow engine speed to less than 1500 rpm until hydraulic temp is above -5°C (23°F). |
ACU 000237.02
ACU 000237.14
ACU 000237.31 |
Identification System |
VIN Security Problem. Have your John Deere dealer repair as soon as possible. |
| ACU 000581.07 |
Transmission System |
Transmission Not Responding to Command. Have your John Deere dealer repair as soon as possible. |
ACU 000628.02
ACU 000628.12
ACU 000629.11
ACU 000629.12
ACU 000630.02
ACU 000630.13 |
Operator Controls |
Control Unit Fault. Restart tractor. If code still exists, have your John Deere dealer repair as soon as possible. |
| ACU 000639.12 |
Communication System |
ACU CAN Message Overflow. Have your John Deere dealer repair as soon as possible. |
| ACU 000639.14 |
Communication system |
ACU CAN Error Limit Exceeded. Have your John Deere dealer repair as soon as possible. |
ACU 000974.02
ACU 000974.03
ACU 000974.04 |
Operator Controls |
Hand Throttle Sensor Circuit Voltage Problem. Foot throttle may still function (if equipped). Have your John Deere dealer repair as soon as possible. |
ACU 001079.02
ACU 001079.03
ACU 001079.04 |
Operator Controls |
ACU Sensor Supply 1 Voltage Problem. Have your John Deere dealer repair as soon as possible. |
ACU 001080.02
ACU 001080.03
ACU 001080.04 |
Operator Controls |
ACU Sensor Supply 2 Voltage Problem. Have your John Deere dealer repair as soon as possible. |
| ACU 002000.09 |
Communication System |
ECU Message Missing. Check fuse F24. |
| ACU 002003.09 |
Communication System |
PTI or PTP Message Missing. Have your John Deere dealer repair as soon as possible. |
| ACU 002020.09 |
Communication System |
SFA Message Missing. Have your John Deere dealer repair as soon as possible. |
| ACU 002049.09 |
Communication System |
CAB Message Missing. Check fuse F22. |
| ACU 523664.02 |
Operator Controls |
Speed Band 1 and 2 Switches Conflict. Have your John Deere dealer repair as soon as possible. |
ACU 523775.02
ACU 523775.09 |
Single Lever Control |
Single Lever Control (if equipped) Hand Presence Switch Problem. Move hand to show operator is in place. If code still exists, have your John Deere dealer repair as soon as possible. |
| Armrest Control Unit (ACU) Diagnostic Trouble Codes |
| Diagnostic Trouble Code |
Display |
Solution |
ACU 523776.02
ACU 523801.02
ACU 523804.02
ACU 523804.03
ACU 523804.04
ACU 523805.02
ACU 523805.03
ACU 523805.04 |
Single Lever Control |
Single Lever Control Problem. To keep working, use SCV controls 3 and 4. Go to CommandARM and disable single lever control. Have your John Deere dealer repair as soon as possible. |
ACU 523923.02
ACU 523923.03
ACU 523923.04 |
Operator Controls |
SCV I Control Lever Switch/Sensor Problem. Have your John Deere dealer repair as soon as possible. |
| ACU 523953.02 |
Operator Controls |
Speed Control Lever Sensor Circuit Conflict (IVT Only). Have your John Deere dealer repair as soon as possible. |
ACU 523953.03
ACU 523953.04 |
Operator Controls |
Speed Control Lever Sensor Voltage Problem (IVT Only). Have your John Deere dealer repair as soon as possible. |
| ACU 523954.07 |
Operator Controls |
Speed Band 1 Adjustment Fault. Have your John Deere dealer repair as soon as possible. |
| ACU 523954.11 |
Operator Controls |
Set Speed Adjuster Conflict. Have your John Deere dealer repair as soon as possible. |
| ACU 523955.31 |
Transmission Load High |
Engine Overload. Reduce load on tractor. |
| ACU 523958.31 |
Operator Controls |
Reversing Ratio Fault. Have your John Deere dealer repair as soon as possible. |
| ACU 523960.31 |
Operator Not In Seat |
Operator Not Seated During Reverser Command. Change position in seat or depress clutch or brake pedals to indicate operator is present. |
| ACU 523961.02 |
Transmission system |
Park Engaged While In Gear. Restart tractor, operate in forward gear. If code returns, have your John Deere dealer repair as soon as possible. |
| ACU 523961.07 |
Transmission Not In Park |
Park Lock Engagement Fault. Have your John Deere dealer repair as soon as possible. |
| ACU 523962.31 |
MFWD System |
MFWD Speed Incorrect. Is a function of traction control. Very important if pulling trailers. Have your John Deere dealer repair as soon as possible. |
| ACU 523966.31 |
Transmission Come Home active |
Transmission Come Home Mode. See IVT Operating section. |
| ACU 523968.02 |
IMS Controls |
IMS Switch Circuit Conflict. Cycle IMS switch ON and then OFF. If code still exists, have your John Deere dealer repair as soon as possible. |
ACU 523968.03
ACU 523968.04 |
IMS Controls |
IMS Switch Circuit Voltage Problem. Cycle IMS switch ON and then OFF. If code still exists, have your John Deere dealer repair as soon as possible. |
| ACU 524018.31 |
Right-Hand Reverser |
RHR Neutral/Not Neutral Transition Fault. Have your John Deere dealer repair as soon as possible. |
| ACU 524-19.13 |
Lever Not in Park |
Tractor transmission will default to PARK. |
| ACU 524019.31 |
Lever not in park |
RHR Neutral/Not Neutral Transition Fault. Have your John Deere dealer repair as soon as possible. |
| ACU 524020.31 |
Lever not in park |
Transmission In Gear at Power Up. Move shift lever to PARK and restart vehicle. |
| ACU 524021.31 |
Operator Controls |
Multiple Reverser Switches Conflict. Have your John Deere dealer repair as soon as possible. |
| ACU 524101.02 |
Operator Controls |
Front Hitch Valve Control Lever Switch/Sensor Circuit Conflict. Have your John Deere dealer repair as soon as possible. |
| Armrest Control Unit (ACU) Diagnostic Trouble Codes |
| Diagnostic Trouble Code |
Display |
Solution |
ACU 524101.03
ACU 524101.04 |
Operator Controls |
Front Hitch Valve Control Lever Sensor Circuit Voltage Problem. Have your John Deere dealer repair as soon as possible. |
| ACU 524102.02 |
Operator Controls |
SCV V Control Lever Switch/Sensor Circuit Conflict. Have your John Deere dealer repair as soon as possible. |
ACU 524102.03
ACU 524102.04 |
Operator Controls |
SCV V Control Lever Sensor Circuit Voltage Problem. Have your John Deere dealer repair as soon as possible. |
| ACU 524103.02 |
Operator Controls |
SCV IV Control Lever Switch/Sensor Circuit Conflict. Have your John Deere dealer repair as soon as possible. |
ACU 524103.03
ACU 524103.04 |
Operator Controls |
SCV IV Control Lever Sensor Circuit Voltage Problem. Have your John Deere dealer repair as soon as possible. |
| ACU 524104.02 |
Operator Controls |
SCV III Control Lever Switch/Sensor Circuit Conflict. Have your John Deere dealer repair as soon as possible. |
ACU 524104.03
ACU 524104.04 |
Operator Controls |
SCV III Control Lever Sensor Circuit Voltage Problem. Have your John Deere dealer repair as soon as possible. |
| ACU 524105.02 |
Operator Controls |
SCV II Control Lever Switch/Sensor Circuit Conflict. Have your John Deere dealer repair as soon as possible. |
ACU 524105.03
ACU 524105.04 |
Operator Controls |
SCV II Control Lever Sensor Circuit Voltage Problem. Have your John Deere dealer repair as soon as possible. |
| ACU 524212.02 |
Operator Controls |
Rear Hitch Control Lever Switch/Sensor Circuit Conflict. Have your John Deere dealer repair as soon as possible. |
ACU 524212.03
ACU 524212.04 |
Operator Controls |
Rear Hitch Control Lever Sensor Circuit Voltage Problem. Have your John Deere dealer repair as soon as possible. |
| ACU 524222.02 |
Operator Controls |
Resume Switch Circuit Conflict. Have your John Deere dealer repair as soon as possible. |
| ACU 524224.02 |
Operator Controls |
Rear PTO Switch Circuit Conflict. Cycle PTO switch (s) OFF and then ON. If code still exists, have your John Deere dealer repair as soon as possible. |
| ACU 524224.02 |
Operator Controls |
Rear PTO Switch Circuit Conflict. Cycle PTO switch (s) OFF and then ON. If code still exists, have your John Deere dealer repair as soon as possible. |
| ACU 524224.14 |
Operator Controls |
Rear PTO Disabled. Make sure PTO switch is OFF when tractor is started. Cycle switch OFF then ON. If code still exists, have your John Deere dealer repair as soon as possible. |
| ACU 524254.31 |
Operator Controls |
Transmission Enable Relay Circuit Fault. Have your John Deere dealer repair as soon as possible. |