TCU FAULT CODES / TCU ERROR CODES

TCU Control Unit – transmission control with AutoPowr/IVT transmissionsion

John Deere TCU fault codes / John Deere TCU diagnostic trouble codes

TCU 000126.00 (TCU 126.00)— Dirty Transmission Oil Filter
The diagnostic trouble code is generated when dirt is registered at the transmission oil filter. The pressure switch of the transmission oil filter is open when transmission oil is at a temperature in excess of 40°C (104°F).

TCU 000127.01 (TCU 127.01)— Transmission Oil Pressure Too Low
This diagnostic trouble code is generated when the control unit does not register any transmission oil pressure (system pressure). The pressure switch for transmission oil (S74) is open at a transmission input speed (engine speed) in excess of 900 rpm. If diagnostic trouble code TCU 524227.12 is also stored, a problem with transmission oil pressure is indicated. In this case, a problem with transmission oil pressure switch (S74) can be ruled out.

TCU 000161.00 (TCU 161.00)— Transmission Input Speed Too High
The diagnostic trouble code is generated when the TCU control unit detects that transmission input speed (engine speed) exceeds the maximum rpm. It is necessary to reduce speed (travel speed). Excessive speed is indicated, when there is NO weight pushing from behind to account for it: Process the diagnostic trouble codes that have priority.

TCU 000161.02 (TCU 161.02)— B61 Sensor for Transmission Input Speed, Implausible Drop in Speed
The diagnostic trouble code is generated if the TCU control unit detects that the transmission input speed has dropped suddenly and inexplicably to 0 rpm.

TCU 000161.03 (TCU 161.03)— B61 Sensor for Transmission Input Speed, Voltage Too High
This diagnostic trouble code is generated if the control unit detects that the voltage at the signal input of transmission input speed sensor (lead 6075) is too high. This indicates that the sensor’s circuit is open or shorted to a positive lead.

TCU 000161.04 (TCU 161.04)— B61 Sensor for Transmission Input Speed, Voltage Too Low
This diagnostic trouble code is generated if the control unit detects that the voltage at the signal input of transmission input speed sensor (lead 6075) is too low. This indicates a short to ground in the circuit.

TCU 000161.11 (TCU 161.11)— Sensor for Transmission Input Speed, Signal does Not Match Engine Speed
The diagnostic trouble code is generated if the transmission input speed registered by the TCU control unit does not match the engine speed that is available at the engine control unit (ECU) via CAN BUS.

TCU 000168.00 (TCU 168.00)— Control Unit, Supply
Voltage Too High The diagnostic trouble code is generated when the control unit registers a supply voltage above 16 volts.

TCU 000168.01 (TCU 168.01)— Control Unit, Supply
Voltage Too Low The diagnostic trouble code is generated when the control unit registers a supply voltage of less than 9 volts.

TCU 000168.02 (TCU 168.02)— Internal Transmission Power Supply (VPS), Incorrect
The diagnostic trouble code is generated when the TCU control unit detects a plausibility problem at the internal transmission power supply inputs (VPS). This indicates an open circuit, a short to a positive lead or a short to ground (lead 6052 and/or 9008).

TCU 000177.00 (TCU 177.00)— Transmission Oil Temperature Very High
The diagnostic trouble code is generated when the transmission oil temperature exceeds 100°C (212°F).

TCU 000177.03 (TCU 177.03)— Sensor for Transmission Oil Temperature, Voltage Too High
This diagnostic trouble code is generated if the control unit detects that the voltage at the signal input of transmission oil temperature sensor (lead 6062) is too high. This indicates that the sensor’s circuit is open or shorted to a positive lead.

TCU 000177.04 (TCU 177.04)— Sensor for Transmission Oil Temperature, Voltage Too Low
This diagnostic trouble code is generated if the control unit detects that the voltage at the signal input of transmission oil temperature sensor (lead 6062) is too low. This indicates a short to ground in the sensor circuit.

TCU 000190.19 (TCU 190.19)— Incorrect CAN BUS Message, Engine Speed from ECU
The diagnostic trouble code is generated if the ECU does not register any engine speed and so cannot provide the CAN BUS with any data. A transmitted replacement value generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the ECU. The ECU diagnostic code takes priority.

TCU 000191.00 (TCU 191.00)— Transmission Output Speed Too High
The diagnostic trouble code is generated when the TCU control unit detects that transmission output speed (tractor travel speed) is excessive. It is necessary to reduce speed (travel speed). Excessive speed is indicated, when there is NO weight pushing from behind to account for it: Process the diagnostic trouble codes that have priority.

TCU 000191.02 (TCU 191.02)— B63 Sensor for Transmission Output Speed, Signal Does Not Match the CAN BUS Message of the PLC
The diagnostic trouble code is generated if there is a difference in frequency between the signal of the transmission output speed sensor (B63) and the CAN BUS signal of the wheel speed sensor (B84). This diagnostic trouble code does not necessarily have any real meaning. It may be saved by accident. For this reason, diagnosis only needs to be performed if one or more related faults occur in conjunction with this code.

TCU 000191.03 (TCU 191.03)— B63 Sensor for Transmission Output Speed, Voltage at Channel 1 Too High
This diagnostic trouble code is generated if the control unit detects that the voltage at the signal input from channel 1 of the transmission output speed sensor (B63, lead 6081) is too high. This indicates that the sensor’s circuit is open or shorted to a positive lead. If diagnostic trouble code TCU 524110.03 is also stored, a problem with the sensor supply voltage is indicated. The diagnostic trouble code must be processed first.

TCU 000191.04 (TCU 191.04)— B63 Sensor for Transmission Output Speed, Voltage at Channel 1 Too Low
This diagnostic trouble code is generated if the control unit detects that the voltage at the signal input from channel 1 of the transmission output speed sensor (B63, lead 6081) is too low. This indicates a short to ground in the sensor circuit.

TCU 000191.08 (TCU 191.08)— B63 Sensor for Transmission Output Speed, Speed in Channel 1 Lower than in Channel 2
The diagnostic trouble code is generated if a difference in frequency is detected between the two sensor output signals for transmission output speed.

TCU 000191.11 (TCU 191.11)— B63 Sensor for Transmission Output Speed, Signal does Not Match the Signal from the PLC
The diagnostic trouble code is generated if there is a difference in frequency between the signal of the transmission output speed sensor (B63) and the amplified signal of the wheel speed sensor (B84).

TCU 000237.02 (TCU 237.02)— VIN Information, Mismatch
The diagnostic trouble code is generated if the vehicle identification number of the UIC control unit does not match the tractor type in address TCU044.

TCU 000237.31 (TCU 237.31)— VIN Information, Incorrect
The diagnostic trouble code is generated when the vehicle identification number from the UIC control unit is not received or incorrectly received.

TCU 000598.02 (TCU 598.02)— S72 Clutch Pedal Switch, Fault
The diagnostic trouble code is generated if the position of the clutch pedal switch does not correspond to the position of the clutch pedal (voltage of clutch pedal potentiometer transmitted as CAN BUS message from the UIC control unit).

TCU 000598.03 (TCU 598.03)— S72 Clutch Pedal Switch, Voltage Too High
The diagnostic trouble code is generated when the control unit detects a short to a positive lead at the signal lead of the clutch pedal switch (S72, lead 6046) during initializing (control unit boot sequence after the ignition is switched ON).

TCU 000604.02 (TCU 604.02)— Transmission Enable Signal Faulty
The diagnostic trouble code is generated when the transmission enable signal (neutral signal, lead 6064) from the transmission enable relay (K06/03 or K02/03) does not match the position of the reverse drive lever (transmitted by the UIC control unit).
– Relay K06/03: Tractors up to Serial Number Break 2008.
– Relay K02/03: Tractors from Serial Number Break 2008.

TCU 000604.03 (TCU 604.03)— Transmission Enable Signal, Voltage Too High
The diagnostic trouble code is generated when the control unit detects a short to a positive lead at the transmission enable signal (neutral signal, lead 6064) during initializing (control unit boot sequence after the ignition is switched ON).

TCU 000630.13 (TCU 630.13)— Control Unit Not Calibrated
The diagnostic trouble code is generated if the TCU has not been calibrated yet, is incorrectly calibrated or if calibration has not been completed. It is also possible that this diagnostic trouble code is generated by mistake during transmission calibration. It is not necessary to perform the calibration procedure again unless this diagnostic trouble code cannot be deleted. This diagnostic trouble code triggers the alarm level: “Information”.

TCU 002000.09 (TCU 2000.09)— Incorrect CAN BUS Message, Information from ECU
This diagnostic trouble code is generated when a data transfer problem occurs between the ECU and TCU. Reception of CAN messages regarding engine load and engine speed from the ECU control unit is intermittent or nonexistent (intermittent reception could be due to a loose wire).

TCU 002005.09 (TCU 2005.09)— Incorrect CAN BUS Message, Information from UIC
This diagnostic trouble code is generated when a data transfer problem occurs between the UIC and TCU. Reception of CAN messages concerning general transmission information (clutch pedal, acceleration, transmission ratios etc.) transmitted by UIC is intermittent or nonexistent (intermittent reception could be due to a loose wire).

TCU 002221.09 (TCU 2221.09)— Incorrect CAN BUS Message, Information from PLC
This diagnostic trouble code is generated when a data transfer problem occurs between the PLC and TCU. Reception of the CAN messages from the PLC control unit regarding the status of the park lock and wheel speed sensor (B84) is intermittent or nonexistent (intermittent reception could be due to a loose wire).

TCU 522367.12 — Control Unit, Wrong Input Value
This diagnostic trouble code is generated if the control unit registers a false setting/input in the tractor model address.

TCU 522379.03 — Y15/1 Park Lock Solenoid Valve 1, Voltage Too High
The diagnostic trouble code is generated if the control unit detects a short to a positive lead at the signal input of park lock solenoid valve 1 (Y15/1, lead 6047).

TCU 522379.04 — Y15/1 Park Lock Solenoid Valve 1, Voltage Too Low
The diagnostic trouble code is generated if the control unit detects a short to ground at the signal input of park lock solenoid valve 1 (Y15/1, lead 6047).

TCU 522379.05 — Y15/1 Park Lock Solenoid Valve 1, Current Too Low
The diagnostic trouble code is generated if the control unit detects an open circuit at the signal input of park lock solenoid valve 1 (Y15/1, lead 6047).

TCU 522379.11 — Y15/2 Park Lock Solenoid Valve 2, Fault
The diagnostic trouble code is generated if the PLC control unit reports a problem with Y15/2 park lock solenoid valve 2 via the CAN BUS. In its active state, this fault also generates a diagnostic trouble code at the PLC. The PLC diagnostic trouble code takes priority.

TCU 522389.03 — C4 Solenoid Valve for Clutch 4, Voltage Too High
The diagnostic trouble code is generated if the control unit registers resistance and voltage at the solenoid valve that does not correspond with the switch status of clutch 4. This indicates a short to a positive lead or a defective solenoid valve. The fault can be recognized by the control unit during initializing (control unit boot sequence after the ignition is switched ON) or with transmission in speed band 4.

TCU 522389.04 — C4 Solenoid Valve for Clutch 4, Voltage Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the solenoid valve that does not correspond with the switch status of clutch 4, and a voltage drop at the solenoid valve is also registered. This indicates a short to ground in the solenoid valve circuit.

TCU 522389.05 — C4 Solenoid Valve for Clutch 4, Current Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the solenoid valve that does not correspond with the switch status of clutch 4. This indicates that the solenoid valve’s circuit is open.

TCU 522392.03 — C3 Solenoid Valve for Clutch 3, Voltage Too High
The diagnostic trouble code is generated if the control unit registers resistance and voltage at the solenoid valve that does not correspond with the switch status of clutch 3. This indicates a short to a positive lead or a defective solenoid valve. The fault can be recognized by the control unit during initializing (control unit boot sequence after the ignition is switched ON) or with transmission in speed band 3.

TCU 522392.04 — C3 Solenoid Valve for Clutch 3, Voltage Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the solenoid valve that does not correspond with the switch status of clutch 3, and a voltage drop at the solenoid valve is also registered. This indicates a short to ground in the solenoid valve circuit.

TCU 522392.05 — C3 Solenoid Valve for Clutch 3, Current Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the solenoid valve that does not correspond with the switch status of clutch 3. This indicates that the solenoid valve’s circuit is open.

TCU 522395.03 — C2 Solenoid Valve for Clutch 2, Voltage Too High
The diagnostic trouble code is generated if the control unit registers resistance and voltage at the solenoid valve that does not correspond with the switch status of clutch 2. This indicates a short to a positive lead or a defective solenoid valve. The fault can be recognized by the control unit during initializing (control unit boot sequence after the ignition is switched ON) or with transmission in speed bands 2, 3 and 4.

TCU 522395.04 — C2 Solenoid Valve for Clutch 2, Voltage Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the solenoid valve that does not correspond with the switch status of clutch 2, and a voltage drop at the solenoid valve is also registered. This indicates a short to ground in the solenoid valve circuit.

TCU 522395.05 — C2 Solenoid Valve for Clutch 2, Current Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the solenoid valve that does not correspond with the switch status of clutch 2. This indicates that the solenoid valve’s circuit is open.

TCU 522399.03 — C1 Solenoid Valve for Clutch 1, Voltage Too High
The diagnostic trouble code is generated if the control unit registers resistance and voltage at the solenoid valve that does not correspond with the switch status of clutch 1. This indicates a short to a positive lead or a defective solenoid valve. The fault can be recognized by the control unit during initializing (control unit boot sequence after the ignition is switched ON) or with transmission in speed band 1.

TCU 522399.04 — C1 Solenoid Valve for Clutch 1, Voltage Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the solenoid valve that does not correspond with the switch status of clutch 1, and a voltage drop at the solenoid valve is also registered. This indicates a short to ground in the solenoid valve circuit.

TCU 522399.05 — C1 Solenoid Valve for Clutch 1, Current Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the solenoid valve that does not correspond with the switch status of clutch 1. This indicates that the solenoid valve’s circuit is open.

TCU 522976.02 — Control Unit Internal Fault
This diagnostic trouble code is generated when an electronic malfunction is registered in the control unit.

TCU 523438.02 — Control Unit Internal Fault
This diagnostic trouble code is triggered if the control unit detects an EEPROM error.

TCU 523652.11 — Control Unit Connected to Wrong Wiring Harness Connector
The diagnostic trouble code is generated when the control unit detects an erroneous signal in the circuit of the control unit identification during initializing (control unit boot sequence after the ignition is switched ON).

TCU 523700.07 — Signals from Transmission Speed Sensors do not Match
The diagnostic trouble code is generated if with power flowing through the transmission the registered ratio between the transmission input speed and hydrostatic speed does not match the actual transmission output speed. This implies a problem with the transmission. If it is not possible to resolve the tractor problem by performing the “Preliminary Tests for Diagnostic Trouble Code TCU 523700.07”, the “Checklist (list of questions) for Diagnostic Trouble Code TCU 523700.07” and the “AutoPowr/IVT Transmission — Test Result Table” (pressure test for transmission and other consumers) must be filled out in full and sent to the relevant AfterSales Service station together with the service report (if requested). The forms can be downloaded via DTAC in a format that allows them to be filled out and transmitted electronically.

TCU 523917.03 — B62 Hydrostatic Speed Sensor, Voltage in Channel 2 Too High
The diagnostic trouble code is generated if the control unit detects that the voltage at the signal input from channel 2 of the hydrostatic speed sensor (B62, lead 6095) is too high. This indicates that there is a supply voltage problem or that the sensor’s circuit is open or shorted to a positive lead.

TCU 523917.04 — B62 Hydrostatic Speed Sensor, Voltage in Channel 2 Too Low
The diagnostic trouble code is generated if the control unit detects that the voltage at the signal input from channel 2 of the hydrostatic speed sensor (B62, lead 6095) is too low. This indicates a short to ground in the sensor circuit.

TCU 523917.08 — B62 Sensor for Hydrostatic Speed, Speed in Channel 2 Lower than in Channel 1
The diagnostic trouble code is generated if a difference in frequency is detected between the two sensor output signals for hydrostatic speed.

TCU 524107.03 — Y2 Proportional Solenoid Valve 2 for Hydrostatic Unit, Voltage Too High
The diagnostic trouble code is generated if the control unit registers resistance and voltage at the proportional solenoid valve Y2 that does not correspond with the commanded operating status of hydrostatic unit. This indicates a general problem with battery voltage or that the proportional solenoid valve’s circuit is shorted to a positive lead.

TCU 524107.04 — Y2 Proportional Solenoid Valve 2 for Hydrostatic Unit, Voltage Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the proportional solenoid valve Y2 that does not correspond with the commanded operating status of hydrostatic unit, and a voltage drop at the proportional solenoid valve is also detected. This indicates a short to ground in the circuit of the proportional solenoid valve.

TCU 524107.05 — Y2 Proportional Solenoid Valve 2 for Hydrostatic Unit, Current Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the proportional solenoid valve Y2 that does not correspond with the commanded operating status of hydrostatic unit. This indicates that the circuit of the proportional solenoid valve is open. If diagnostic trouble code TCU 524108.05 is also stored, a general problem with the supply voltage (VPS) of the proportional solenoid valves is indicated (lead 6052).

TCU 524108.03 — Y1 Proportional Solenoid Valve 1 for Hydrostatic Unit, Voltage Too High
The diagnostic trouble code is generated if the control unit registers resistance and voltage at the proportional solenoid valve Y1 that does not correspond with the commanded operating status of hydrostatic unit. This indicates a general problem with battery voltage or that the proportional solenoid valve’s circuit is shorted to a positive lead.

TCU 524108.04 — Y1 Proportional Solenoid Valve 1 for Hydrostatic Unit, Voltage Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the proportional solenoid valve Y1 that does not correspond with the commanded operating status of hydrostatic unit, and a voltage drop at the proportional solenoid valve is also detected. This indicates a short to ground in the circuit of the proportional solenoid valve.

TCU 524108.05 — Y1 Proportional Solenoid Valve 1 for Hydrostatic Unit, Current Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the proportional solenoid valve Y1 that does not correspond with the commanded operating status of hydrostatic unit. This indicates that the circuit of the proportional solenoid valve is open. If diagnostic trouble code TCU 524107.05 is also stored, a general problem with the supply voltage (VPS) of the proportional solenoid valves is indicated (lead 6052).

TCU 524109.10 — B84 Wheel Speed Sensor, Fault
The diagnostic trouble code is generated if the PLC control unit reports a faulty wheel speed sensor (B84) via CAN BUS. In its active state, this fault also generates a diagnostic trouble code at the PLC. The PLC diagnostic trouble code takes priority.

TCU 524110.03 — B63 Sensor for Transmission Output Speed, Voltage at Channel 2 Too High
This diagnostic trouble code is generated if the control unit detects that the voltage at the signal input from channel 2 of the transmission output speed sensor (B63, lead 6083) is too high. This indicates that there is a supply voltage problem or that the sensor’s circuit is open or shorted to a positive lead.

TCU 524110.04 — B63 Sensor for Transmission Output Speed, Voltage at Channel 2 Too Low
This diagnostic trouble code is generated if the control unit detects that the voltage at the signal input from channel 2 of the transmission output speed sensor (B63, lead 6083) is too low. This indicates a short to ground in the sensor circuit.

TCU 524110.08 — B63 Sensor for Transmission Output Speed, Speed in Channel 2 Lower than in Channel 1
The diagnostic trouble code is generated if a difference in frequency is detected between the two sensor output signals for transmission output speed.

TCU 524153.03 — BG Solenoid Valve for Disk Brake, Voltage Too High
The diagnostic trouble code is generated if the control unit registers resistance and voltage at the solenoid valve that does not correspond with the switch status of disk brake BG. This indicates a short to a positive lead or a defective solenoid valve. The fault can be recognized by the control unit during initializing (control unit boot sequence after the ignition is switched ON) or with transmission in speed bands 1 and 2.

TCU 524153.04 — BG Solenoid Valve for Disk Brake, Voltage Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the solenoid valve that does not correspond with the switch status of BG disk brake, and a voltage drop at the solenoid valve is also registered. This indicates a short to ground in the solenoid valve circuit.

TCU 524153.05 — BG Solenoid Valve for Disk Brake, Current Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the solenoid valve that does not correspond with the switch status of BG disk brake. This indicates that the solenoid valve’s circuit is open.

TCU 524154.03 — CF Proportional Solenoid Valve for Forward Clutch, Voltage Too High
The diagnostic trouble code is generated if the control unit registers resistance and voltage at the CF proportional solenoid valve that does not correspond with the switch status of forward clutch. This indicates a short to a positive lead in the circuit of the proportional solenoid valve.

TCU 524154.04 — CF Proportional Solenoid Valve for Forward Clutch, Voltage Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the CF proportional solenoid valve that does not correspond with the switch status of forward clutch, and a voltage drop at the proportional solenoid valve is also detected. This indicates a short to ground in the circuit of the proportional solenoid valve.

TCU 524154.05 — CF Proportional Solenoid Valve for Forward Clutch, Current Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the CF proportional solenoid valve that does not correspond with the switch status of forward clutch. This indicates that the circuit of the proportional solenoid valve is open. If diagnostic trouble code TCU 524155.05 is also stored, a general problem with the supply voltage of the proportional solenoid valves is indicated (lead 6046).

TCU 524155.03 — CR Proportional Solenoid Valve for Reverse Clutch, Voltage Too High
The diagnostic trouble code is generated if the control unit registers resistance and voltage at the CR proportional solenoid valve that does not correspond with the switch status of reverse clutch. This indicates a short to a positive lead in the circuit of the proportional solenoid valve.

TCU 524155.04 — CR Proportional Solenoid Valve for Reverse Clutch, Voltage Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the proportional solenoid valve CR that does not correspond with the switch status of reverse clutch, and a voltage drop at the proportional solenoid valve is also detected. This indicates a short to ground in the circuit of the proportional solenoid valve.

TCU 524155.05 — CR Proportional Solenoid Valve for Reverse Clutch, Current Too Low
The diagnostic trouble code is generated if the control unit registers a resistance at the CR proportional solenoid valve that does not correspond with the switch status of reverse clutch. This indicates that the circuit of the proportional solenoid valve is open. If diagnostic trouble code TCU 524154.05 is also stored, a general problem with the supply voltage of the proportional solenoid valves is indicated (lead 6046).

TCU 524156.07 — Amperage at Hydrostatic Unit does not Match the Registered Speed
The diagnostic trouble code is generated if amperage at the proportional solenoids of the hydrostatic unit does not match the registered ratio between the transmission input speed and the speed of the hydrostatic unit. This implies a problem with the hydrostatic unit. If it is not possible to detect a damage at the hydrostatic unit by performing the “Preliminary Tests for Diagnostic Trouble Code TCU 524156.07”, or the tractor problem cannot be resolved, the “Checklist (list of questions) for Diagnostic Trouble Code TCU 524156.07” and the “AutoPowr/IVT Transmission — Test Result Table” (pressure test for transmission and other consumers) must be filled out in full and sent to the relevant AfterSales Service station together with the service report (if requested). The forms to be filled out for diagnostic trouble code TCU 524156.07 test can be downloaded via DTAC in a format that allows them to be filled out and transmitted electronically.

TCU 524158.02 — Control Unit, Incorrect Software Version
The diagnostic trouble code is generated if the TCU software and the existing transmission hardware do not match.

TCU 524161.19 — Incorrect CAN BUS Message, Desired Acceleration from UIC
The diagnostic trouble code is generated if the UIC control unit is not able to determine the desired acceleration value (DTOA) and so cannot provide the CAN BUS with any relevant data. A transmitted replacement value generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the UIC.

TCU 524165.19 — Incorrect CAN BUS Message, Clutch Torque from UIC
The diagnostic trouble code is generated if the UIC control unit is not able to determine the clutch torque (DCTL) and so cannot provide the CAN BUS with any relevant data. A transmitted replacement value generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the UIC.

TCU 524167.19 — Incorrect CAN BUS Message, Desired Transmission Ratio from UIC
The diagnostic trouble code 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 replacementvalue generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the UIC.

TCU 524170.19 — Incorrect CAN BUS Message, Park Lock Condition from UIC
The diagnostic trouble code 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 generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the UIC and/or PLC.

TCU 524171.19 — Incorrect CAN BUS Message, Direction of Travel from UIC
The diagnostic trouble code 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 generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the UIC.

TCU 524172.19 — Incorrect CAN BUS Message, Clutch Pedal Information from UIC
The diagnostic trouble code 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 relevant data. A transmitted replacement value generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the UIC.

TCU 524174.19 — Incorrect CAN BUS Message, Park Lock Activation from UIC
The diagnostic trouble code 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 generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the UIC and/or PLC.

TCU 524175.19 — Incorrect CAN BUS Message, Transmission Output Speed from PLC
The diagnostic trouble code 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 relevant data. A transmitted replacement value generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the PLC.

TCU 524176.19 — Incorrect CAN BUS Message, Status of Park Lock Pressure Sensor from PLC
The diagnostic trouble code 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 replacement value generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the PLC.

TCU 524177.19 — Incorrect CAN BUS Message, Transmission Output Speed from PLC
The diagnostic trouble code 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 value generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the PLC.

TCU 524178.19 — Incorrect CAN BUS Message, Transmission Output Speed from PLC
The diagnostic trouble code 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 replacement value generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the PLC.

TCU 524179.19 — Incorrect CAN BUS Message, Status of Park Lock Solenoid Valve 2 from PLC
The diagnostic trouble code 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 transmitted replacement value generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the PLC.

TCU 524180.19 — Incorrect CAN BUS Message, Status of ComeHome Mode from UIC
The diagnostic trouble code 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 this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the UIC.

TCU 524181.19 — Incorrect CAN BUS Message, Desired Acceleration from UIC
The diagnostic trouble code is generated if the UIC control unit is not able to determine the desired acceleration value (DTOAPR) when changing the direction of travel and so cannot provide the CAN BUS with any relevant data. A transmitted replacement value generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the UIC.

TCU 524182.19 — Incorrect CAN BUS Message, Transmission Shift Monitor from UIC
The diagnostic trouble code is generated if the UIC control unit is not able to determine the value of the transmission shift monitor (RSL) and so cannot provide the CAN BUS with any relevant data. A transmitted replacement value generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the UIC.

TCU 524183.19 — Incorrect CAN BUS Message, Change of Direction of Travel from UIC
The diagnostic trouble code is generated if the UIC control unit is not able to determine the value for changing direction of travel (PSS) and so cannot provide the CAN BUS with any relevant data. A transmitted replacement value generates this diagnostic trouble code in the TCU. In its active state, this fault also generates a diagnostic trouble code at the UIC.

TCU 524218.12 — Park Lock Engaged during Power Zero
The diagnostic trouble code is generated if the control unit detects that the park lock is engaged, even though Power Zero is commanded by the UIC control unit at the same time.

TCU 524218.31 — Power Zero Signal is Transmitted by the UIC for Too Long
The diagnostic trouble code is generated when the control unit receives the power zero signal from the UIC via the CAN BUS for more than 5 minutes.

TCU 524227.07 — Filter ByPass Valve (Coldweather Starting) is Closed by Mistake
The diagnostic trouble code is generated if the filter bypass valve (for coldweather starting) is closed under the following conditions:
– Transmission input speed (engine speed) is over 1400 rpm and transmission oil temperature is below 5° C (23°F).
– Engine OFF.
The diagnostic trouble code triggers the alarm level: “Information”.

TCU 524227.12 — Filter ByPass Valve (Coldweather Starting) is Opened by Mistake
The diagnostic trouble code is generated if the filter bypass valve (coldweather starting) is open while transmission input speed (engine speed) is above 1400 rpm and transmission oil temperature exceeds +30°C (86°F). If diagnostic trouble code TCU 000127.01 is also stored, process this code first.

TCU 524233.03 — B62 Hydrostatic Speed Sensor, Voltage in Channel 1 Too High
The diagnostic trouble code is generated if the control unit detects that the voltage at the signal input from channel 1 of the hydrostatic speed sensor (B62, lead 6089) is too high. This indicates that the sensor’s circuit is open or shorted to a positive lead. If diagnostic trouble code TCU 523917.03 is also stored, a problem with the sensor supply voltage is indicated. The diagnostic trouble code must be processed first.

TCU 524233.04 — B62 Hydrostatic Speed Sensor, Voltage in Channel 1 Too Low
The diagnostic trouble code is generated if the control unit detects that the voltage at the signal input from channel 1 of the hydrostatic speed sensor (B62, lead 6089) is too low. This indicates a short to ground in the sensor circuit.

TCU 524233.08 — B62 Sensor for Hydrostatic Speed, Speed in Channel 1 Lower than in Channel 2
The diagnostic trouble code is generated if a difference in frequency is detected between the two sensor output signals for hydrostatic speed.

TCU 600006.31 — Diagnostic Trouble Code Not Known
This diagnostic trouble code is triggered by the CommandCenter (DTI) when the DTI receives a TCU diagnostic trouble code via the CAN BUS that is not stored in the DTI memory. This “general” diagnostic trouble code enables the CommandCenter (DTI) to display information relating to this unknown TCU diagnostic trouble code.

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