CCU FAULT CODES / CCU ERROR CODES

John Deere CCU fault codes / John Deere CCU diagnostic trouble codes

CCU 000096.03 (CCU 96.03)- Fuel Level Sensor Circuit Voltage High
Code Caused By: Fuel level sensor output voltage is above normal operating range, indicating an open circuit.

CCU 000096.04 (CCU 96.04)- Fuel Level Sensor Circuit Voltage Low
Code Caused By: Fuel level sensor output voltage is below normal operating range, indicating a short to ground.

CCU 000096.17 (CCU 96.17)— Fuel Level Low
Code Caused By: The Chassis Control Unit (CCU) detects that the fuel percentage level is indicating a low fuel level (below 3%).
Note: Make sure there is fuel in the tank.

CCU 000237.02 (CCU 237.02)- VIN Security Data Conflict
Code caused by: Vehicle Identification Number (VIN) from other control units is not the same.

CCU 000237.14 (CCU 237.14)— VIN Security Not Enabled
Code Caused By: The Vehicle Identification Number (VIN) security feature has not been enabled.

CCU 000237.31 (CCU 237.31)- VIN Security Messages Missing
Code caused by: VIN Messages are missing on CAN bus from control units or other control units in network are not committed in the required time.

CCU 000567.05 (CCU 567.05)— Front Differential Lock Solenoid Circuit Fault
Code caused by: The Chassis Control Unit (CCU) detects an abnormality in the front differential lock solenoid valve driver or circuit (open circuit, short circuit, or over temperature).

CCU 000569.05 (CCU 569.05)- Rear Differential Lock Solenoid Circuit Fault
Code caused by: Chassis Control Unit (CCU) detects a malfunction in the rear differential lock solenoid driver or circuit (open, short, or over temperature).

CCU 000628.02 (CCU 628.02)- CCU EOL Data Fault
Code caused by: Chassis Control Unit (CCU) detects that its End Of Line (EOL) memory failed at start up.

CCU 000630.14 (CCU 630.14)- Rear PTO Configuration Invalid
Code caused by: Incorrect PTO speed configuration data.

CCU 001079.03 (CCU 1079.03)— CCU Sensor Supply Voltage High
Code Caused By: The power sensor voltage is above the normal operating range. The sensor supply voltage is higher than 5.2 V.

CCU 001079.04 (CCU 1079.04)— CCU Sensor Supply Voltage Low
Code Caused By: The power sensor voltage is below the normal operating range. The sensor supply voltage is less than 4.8 V.

CCU 001086.03 (CCU 1086.03)— Air Brake Pressure Sensor Circuit Voltage High
Code Caused By: Air brake pressure sensor voltage is above normal range or shorted to high source.

CCU 001086.04 (CCU 1086.04)— Air Brake Pressure Sensor Circuit Voltage Low
Code caused by: Air brake pressure sensor voltage is below normal range or shorted to low source.

CCU 001086.18 (CCU 1086.18)— Air Brake Pressure Low
Code caused by: The chassis control unit (CCU) detects that the air brake pressure switch is open, indicating insufficient pressure.

CCU 001638.00 (CCU 1638.00)- Hydraulic Oil Temperature Very Hot
Code caused by: Hydraulic oil temperature sensor indicates fluid is too hot to continue operation. Hydraulic oil temperature is greater than 120 °C for more than 6 seconds.

CCU 001638.03 (CCU 1638.03)- Hydraulic Oil Temperature Sensor Circuit Voltage High
Code caused by: Hydraulic oil temperature sensor indicates a short circuit. Sensor voltage above 4.8 V for more than 2 seconds.

CCU 001638.04 (CCU 1638.04)- Hydraulic Oil Temperature Sensor Circuit Voltage Low
Code caused by: Hydraulic oil temperature sensor indicates a short to ground. Sensor voltage below 0.02 V for more than 2 seconds.

CCU 001638.16 (CCU 1638.16)- Hydraulic Oil Temperature High
Code caused by: Hydraulic oil temperature sensor indicates fluid is warmer than normal. Hydraulic oil temperature is greater than 110 °C for more than 6 seconds.

CCU 001713.00 (CCU 1713.00)— Hydraulic Oil Filter Restricted
Code Caused By: The Chassis Control Unit (CCU) detects that the hydraulic oil filter clogging sensor voltage is high for an extended period.

CCU 001883.00 (CCU 1883.00)- Rear PTO Overspeed
Code caused by: PTO shaft speed over 540 or 1000 limits. PTO shuts OFF if shaft speed more than 17% fast for 2 seconds. PTO shuts OFF immediately if shaft speed more than 30% fast.

CCU 001883.01 (CCU 1883.01)- Rear PTO Underspeed
Code caused by: PTO shaft turning at less than 100 rpm continuously for a minimum of 5 seconds with the PTO engaged.
Attention: A low rear PTO calibration value could cause a code to appear. Low engine RPM when using a heavy implement can cause this code to be generated.
Note: Make sure the CommandCenter™ has properly adjusted the rear PTO linkage. Auto mode automatically detects if there are heavy loads on the PTO and makes the required compensation. If the rear PTO does not accelerate, the automatic mode will increase the connection speed. A high speed can be used for applications where the engagement of the rear PTO clutch must be unusually sharp.

CCU 001883.13 (CCU 1883.13 )— Rear PTO Not Calibrated
Code Caused By: The Chassis Control Unit (CCU) detects that the rear PTO needs to be calibrated.

CCU 002392.05 (CCU 2392.05)— Back Up Alarm Circuit Fault
Code Caused By: The Chassis Control Unit (CCU) detects a fault in the backup alarm circuit.

CCU 002602.01 (CCU 2602.01)— Hydraulic Clean Oil Reservoir Level Very Low
Code caused by: The Chassis Control Unit (CCU) detects that the hydraulic oil level switch indicates that the oil level is too low to continue operation.
Attention: The detection starts when the hydraulic oil temperature is high and when the engine is running at a certain rpm, while the low level is indicated. The differential case has been running out of oil and is not supplying the tank with clean oil.

CCU 002602.02 (CCU 2602.02)— Hydraulic Clean Oil Reservoir Level Switch Fault
Code Caused By: The Chassis Control Unit (CCU) detects a fault in the Clean Hydraulic Oil Reservoir (COR) level switch.

CCU 002602.18 (CCU 2602.18)— Hydraulic Oil Level Low
Code Caused By: The Chassis Control Unit (CCU) detects that the Clean Hydraulic Oil Reservoir (COR) level switch indicates a low oil level.
Attention: The detection starts when the hydraulic oil temperature is low and the engine is running for at least 2 to 10 seconds, (depending on the engine speed) while the low level is indicated. There is an oil leak from the secondary hydraulic circuit (SCV/hitch), or from the inlet lines to either the plunger pump and/or steering pump, or the charge pump has failed during vehicle operation.
NOTE: If codes CCU 002602.18, HCU 002602.18, and SCC 002602.18 are present and the hitch will not raise or lower, it is likely that the hitch retract valve spool is stuck. This causes oil from the clean oil reservoir to drain into the sump.

CCU 002818.31 (CCU 2818.31)- Operator Presence Switch Not Activated
Code caused by: Rear PTO switch ON and operator not present.

CCU 003509.03 (CCU 3509.03)- Sensor Supply Voltage Out of Range High
Code caused by: Voltage from sensor supply higher than normal operating range. Sensor supply voltage above 5.2 V.

CCU 003509.04 (CCU 3509.04)- Sensor Supply Voltage Out of Range Low
Code caused by: Voltage from sensor supply lower than normal operating range. Sensor supply voltage below 4.8 V.

CCU 522260.02 — Wheel Speed Sensors Mismatch
Code Caused By: The Chassis Control Unit (CCU) detects that the primary and secondary wheel speed sensors do not match.

CCU 522384.14 — 4R/5R PTO Inhibited
Code Caused By: The Chassis Control Unit (CCU) detects that the vehicle is in high reverse gear (4th or 5th) while the rear PTO is engaged.

CCU 523698.09 — AMS Display Message Missing
Code Caused By: The Chassis Control Unit (CCU) is not receiving the required messages from the GreenStar™ display.

CCU 523316.04 – CCU Switched Supply Voltage Low
Code caused by: Switched supply voltage to CCU below 9.0 V.

CCU 523749.16 — PTO Clutch Slipping Too Long
Code Caused By: Repeated engagement of the PTO by the operator with heavy loads. High engine and PTO engagement speed causes engine speed drop to 500rpm and PTO clutch overheating. The CCU will disable the PTO and generate this code. If the PTO is disengaged, the code will be displayed for seven seconds. If it is not turned off, the code will remain on the display until the switch is turned off. The switch will not engage the PTO for seven seconds to allow the PTO clutch time to cool down.
Attention: Make sure the CommandCenter™ console is set correctly to the Rear PTO Engage Mode. Auto mode automatically detects if there are heavy loads on the PTO and makes the required compensation. If the rear PTO does not accelerate, the automatic mode will increase the connection speed. A high speed can be used for applications where the engagement of the rear PTO clutch must be unusually sharp.

CCU 523839.02 – Secondary Brake Switch Conflict
Code caused by: Secondary brake is disengaged but the switch is ON or secondary brake is engaged but the switch is OFF. Secondary brake lever normally open and normally closed switches indicate conflicting states. Brake is currently disengaged/engaged and the on and off signals from the secondary brake switch are both high or both low continuously for more than 0.5 seconds.

CCU 523844.12 – Differential Lock Braking Disabled
Code caused by: Differential lock switch has been closed for more than 5 minutes.

CCU 523851.02 — iTEC™ Disabled Due To HCC/SCC/TEC
Code Caused By: The Chassis Control Unit (CCU) detects that the Intelligent All Equipment Control (iTEC™) has interrupted the sequence due to a lack of response from the HCC (Hitch Control Unit) remote control valve electronic control (SCC) or tractor equipment control unit (TEC).
Attention: Cancels the iTEC™ sequence. Associated Codes: This code is almost always the result of a Hoist Control Unit (HCC) code, a Remote Control Valve Electronic Control (SCC) unit code, or a Control Unit code. tractor equipment control (TEC). Each individual HCC, SCC, or TEC code must be resolved before beginning the CCU 523851.02 code diagnosis.

CCU 523907.02 – PTO Remote Enable Switch Conflict
Code caused by: ON and OFF switches receives high or low voltage input.

CCU 523908.02 – Rear PTO External Switch Conflict
Code Caused By: CCU control unit detects that the rear PTO external switch signals simultaneous ON and OFF states.

CCU 523916.00 — Hydraulic Oil Filter Restriction Sensor Bypassed Under 1500 rpm
Code caused by: The chassis control unit (CCU) detects that the hydraulic oil filter clogging sensor detected high pressure while the engine speed was below 1500 rpm, for more than 15 seconds.
Related Codes: This code is almost always the result of a 523916.03 or 523916.04 code. Each individual 523916.03 or 523916.04 code must be resolved before starting the 523916.00 code diagnosis.

CCU 523916.03 — Hydraulic Oil Filter Restriction Sensor Circuit Voltage High
Code caused by: The chassis control unit (CCU) detects that the hydraulic oil filter clogging sensor voltage is higher than normal or shorted to high source.
Attention: Assumes that the filter is not clogged. If known clogged, slow idle is commanded until operator shuts engine off.

CCU 523916.04 — Hydraulic Oil Filter Restriction Sensor Circuit Voltage Low
Code caused by: The chassis control unit (CCU) detects that the hydraulic oil filter clogging sensor voltage is lower than normal or shorted to low source.
Attention: Assumes that the filter is not clogged. If known clogged, slow idle is commanded until operator shuts engine off.

CCU 523916.15 — Hydraulic Oil Filter Restricted
Code caused by: The chassis control unit (CCU) detects that the hydraulic oil filter clogging sensor detected that the pressure is greater than 350 kPa (3.5 bar [50.75 PSI]), but less than 425 kPa ( 4.25 bar [61.64 PSI]), while the engine speed exceeds 800 rpm for more than 15 seconds.

CCU 523916.16 — Hydraulic Oil Filter Restriction Sensor Bypassed Over 1500 rpm
Code caused by: The chassis control unit (CCU) detects that the hydraulic oil filter clogging sensor detected high pressure while the engine speed was above 1500rpm, for more than 15 seconds.
Related Codes: This code is almost always the result of a 523916.03 or 523916.04 code. Each individual 523916.03 or 523916.04 code must be resolved before starting the 523916.16 code diagnosis.

CCU 524016.04 — CCU Switched Supply Voltage Low
Code caused by: The Chassis Control Unit (CCU) detects that the switch supply voltage (trigger voltage) of the Cab Electrical Load Center (CLC) control unit is low.
Attention: The activation voltage is the switched battery voltage (ELX), from 12.5 to 14.5 V. Related codes: Other low voltage codes CCU XXXXXX.04 for sensors (clean oil tank level, clutch disengaged and primary wheel speed) that

CCU 524037.02 – MFWD Switch Circuit Fault
Code caused by: Brake assist and auto switch inputs are detected as ON simultaneously for longer than 3 seconds.

CCU 524223.03 – Differential Lock Circuit Voltage High
Code caused by: Differential lock switch has been closed for more than 5 minutes.

CCU 524224.02 — PTO Switch Voltage Mismatch
Code Caused By: The Chassis Control Unit (CCU) detects that the rear PTO switch direct input signal differs from the armrest control unit (ACU) CAN message for the rear PTO located above the switch.
Related Codes: This code is almost always the result of an Armrest Control Unit (ACU) code. Each individual ACU code must be resolved before starting the diagnosis of CCU code 524224.02.

CCU 524224.14 – PTO Switch Voltage Mismatch
Code caused by: PTO switch is ON at power up (PTO kept off and a fault generated until a valid OFF state of the switch is detected). PTO is disabled but the switch is ON. The PTO is currently commanded to be OFF and the on and off signals from the PTO switch are both high or both low continuously for more than 2 seconds. The PTO is currently commanded to be ON and the on and off signals from the PTO switch are both high or both low continuously for more than 250 msec.

CCU 524236.31 — MFWD Switch/ iTEC™ Conflict
Code Caused By: The Chassis Electronic Control Unit (CCU) detects that the Intelligent All Equipment Control (iTEC™) has been turned off while sending a MFWD command and the iTEC™ command is not the same as the MFWD command. MFWD switch. Note: This code is issued by operator induction. Attention: The code can be cleared by turning the Intelligent Control of All Equipment (iTEC™) back ON or by turning the MFWD switch on and off.

CCU 524251.31 — Operator Not Present with Rear PTO Engaged Code Caused By: The Chassis Control Unit (CCU) detects that the PTO is engaged while the operator is out of the seat, or the seat is raised while the PTO is engaged. Note: This alert code can be issued by operator prompting. Attention: Make sure the operator is heavy enough to activate the seat presence switch and inspect the condition of the seat harness.

CCU 524235.05 – MFWD Solenoid Circuit Fault
Code caused by: Control unit is commanding the MFWD solenoid to be on (MFWD function OFF) and the MFWD valve driver status line is low for 2 seconds.

CCU 524252.05 – Rear PTO Solenoid Circuit Fault
Code caused by: Solenoid is commanded on and the return voltage is less than 0.75 V or greater than 2.00 V for more than 2 seconds.

CCU 524255.31 – Rear Remote PTO Enabled
Code caused by: Information Only Warning. Hazard lights flash to warn operator that PTO is armed and can be turned on with remote switch.

CCU 600006.31 – Default DTC
Code caused by: Solenoid is commanded on and the return voltage is less than 0.75 V or greater than 2.00 V for more than 2 seconds.

Non-Tractor CCU Code List

CCU 000100.01 (CCU 100.01)-Engine Oil Pressure Signal Extremely Low

CCU 000100.04 (CCU 100.04)-Engine Oil Pressure Signal Out of Range Low

CCU 000110.03 (CCU 110.03)-Engine Coolant Temperature Signal Out of Range High

CCU 000110.04 (CCU 110.04)-Engine Coolant Temperature Signal Out of Range Low

CCU 000110.16 (CCU 110.16)-Engine Coolant Temperature Signal Moderately High