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TCU codes

Comprehensive Guide to John Deere TCU Fault Codes and Diagnostic Trouble Codes

Understanding John Deere TCU fault codes is essential for maintaining the optimal performance of your equipment. These codes help identify specific issues within the Transmission Control Unit (TCU), allowing for timely and accurate troubleshooting. Below are some of the most common John Deere TCU diagnostic trouble codes, their meanings, and where they typically occur.

Common John Deere TCU Fault Codes

TCU 000126.00 – Dirty Transmission Oil Filter
- Description: This code is generated when dirt is detected in the transmission oil filter.
- Location: Transmission system.
- Impact: Can cause reduced transmission efficiency and potential overheating.
TCU 000127.01 – Transmission Oil Pressure Too Low
- Description: Indicates that the control unit does not register any transmission oil pressure.
- Location: Transmission system.
- Impact: May lead to improper transmission functioning and potential damage.
TCU 000161.00 – Transmission Input Speed Too High
- Description: Triggered when the transmission input speed exceeds the maximum RPM.
- Location: Engine and transmission interface.
- Impact: Can cause severe wear and tear on transmission components.
TCU 000177.00 – Transmission Oil Temperature Very High
- Description: This code is generated when the transmission oil temperature exceeds 100°C (212°F).
- Location: Transmission system.
- Impact: High oil temperature can lead to transmission failure and reduced lifespan.
TCU 600006.31 – Diagnostic Trouble Code Not Known
- Description: Indicates the presence of an unknown diagnostic trouble code received via CAN BUS.
- Location: CommandCenter (DTI).
- Impact: Can complicate diagnostics and troubleshooting processes.

Importance of Addressing John Deere TCU Error Codes

Timely addressing John Deere TCU error codes is crucial for the following reasons:

Prevents Further Damage: Early detection and resolution of TCU fault codes can prevent more significant issues and expensive repairs.
Ensures Optimal Performance: Keeping the transmission system in good condition ensures the overall efficiency and performance of the equipment.
Safety: Proper functioning of the transmission system is essential for the safe operation of John Deere machinery.

Regular monitoring and addressing of John Deere TCU diagnostic trouble codes is vital for the longevity and performance of your equipment. By understanding these common error codes and their implications, you can maintain your John Deere machinery more effectively, ensuring it operates smoothly and safely.

TCU 524180.19 – Incorrect CAN BUS Message, Status of ComeHome Mode from UIC
John Deere TCU codes
This diagnostic trouble code (TCU 524180.19) is generated if the UIC control unit is not able to determine the status of comehome mode (LHR) and so cannot provide the CAN BUS with any relevant data. A transmitted replacement value generates…
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TCU 524179.19 – Incorrect CAN BUS Message, Status of Park Lock Solenoid Valve 2 from PLC
John Deere TCU codes
This diagnostic trouble code (TCU 524179.19) is generated if the PLC control unit is not able to determine the status of the park lock solenoid valve Y15/2 (current) and so cannot provide the CAN BUS with any relevant data. A…
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TCU 524178.19 – Incorrect CAN BUS Message, Transmission Output Speed from PLC
John Deere TCU codes
This diagnostic trouble code (TCU 524178.19) is generated if the PLC control unit is not able to determine the diagnostic status of the wheel speed sensor (B84) and so cannot provide the CAN BUS with any relevant data. A transmitted…
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TCU 524177.19 – Incorrect CAN BUS Message, Transmission Output Speed from PLC
John Deere TCU codes
This diagnostic trouble code (TCU 524177.19) is generated if the PLC control unit is not able to determine the status of the wheel speed sensor (B84) and so cannot provide the CAN BUS with any relevant data. A transmitted replacement…
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TCU 524176.19 – Incorrect CAN BUS Message, Status of Park Lock Pressure Sensor from PLC
John Deere TCU codes
This diagnostic trouble code (TCU 524176.19) is generated if the PLC control unit is not able to determine the status of the park lock pressure sensor (B90) and so cannot provide the CAN BUS with any relevant data. A transmitted…
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TCU 524175.19 – Incorrect CAN BUS Message, Transmission Output Speed from PLC
John Deere TCU codes
This diagnostic trouble code (TCU 524175.19) is generated if the PLC control unit is not able to determine the frequency of the transmission output speed, via the wheel speed sensor (B84), and so cannot provide the CAN BUS with any…
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TCU 524174.19 – Incorrect CAN BUS Message, Park Lock Activation from UIC
John Deere TCU codes
This diagnostic trouble code (TCU 524174.19) is generated if the UIC control unit is not able to determine the value for park lock activation (DPLS) and so cannot provide the CAN BUS with any relevant data. A transmitted replacement value…
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TCU 524172.19 – Incorrect CAN BUS Message, Clutch Pedal Information from UIC
John Deere TCU codes
This diagnostic trouble code (TCU 524172.19) is generated if the UIC control unit is not able to determine the clutch pedal switch status (value is obtained via clutch pedal potentiometer B65) and so cannot provide the CAN BUS with any…
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TCU 524171.19 – Incorrect CAN BUS Message, Direction of Travel from UIC
John Deere TCU codes
This diagnostic trouble code (TCU 524171.19) is generated if the UIC control unit is not able to determine the value for direction of travel (DDT) and so cannot provide the CAN BUS with any relevant data. A transmitted replacement value…
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TCU 524170.19 – Incorrect CAN BUS Message, Park Lock Condition from UIC
John Deere TCU codes
This diagnostic trouble code (TCU 524170.19) is generated if the UIC control unit is not able to determine the value for park lock condition (IPLS) and so cannot provide the CAN BUS with any relevant data. A transmitted replacement value…
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TCU 524167.19 – Incorrect CAN BUS Message, Desired Transmission Ratio from UIC
John Deere TCU codes
This diagnostic trouble code (TCU 524167.19) is generated if the UIC control unit is not able to determine the desired transmission ratio (DTRR) and so cannot provide the CAN BUS with any relevant data. A transmitted replacement value generates this…
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John Deere News & Innovations: Equipment, Technology, Solutions

TCU codes

Comprehensive Guide to John Deere TCU Fault Codes and Diagnostic Trouble Codes

Common John Deere TCU Fault Codes

Importance of Addressing John Deere TCU Error Codes

TCU 524180.19 – Incorrect CAN BUS Message, Status of ComeHome Mode from UIC

TCU 524179.19 – Incorrect CAN BUS Message, Status of Park Lock Solenoid Valve 2 from PLC

TCU 524178.19 – Incorrect CAN BUS Message, Transmission Output Speed from PLC

TCU 524177.19 – Incorrect CAN BUS Message, Transmission Output Speed from PLC

TCU 524176.19 – Incorrect CAN BUS Message, Status of Park Lock Pressure Sensor from PLC

TCU 524175.19 – Incorrect CAN BUS Message, Transmission Output Speed from PLC

TCU 524174.19 – Incorrect CAN BUS Message, Park Lock Activation from UIC

TCU 524172.19 – Incorrect CAN BUS Message, Clutch Pedal Information from UIC

TCU 524171.19 – Incorrect CAN BUS Message, Direction of Travel from UIC

TCU 524170.19 – Incorrect CAN BUS Message, Park Lock Condition from UIC

TCU 524167.19 – Incorrect CAN BUS Message, Desired Transmission Ratio from UIC

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