This diagnostic trouble code (TCU 524108.03) is generated if the control unit registers resistance and voltage at the proportional solenoid valve Y1 that do not correspond with the commanded operating status of the hydrostatic unit. This indicates a general problem with battery voltage or that the proportional solenoid valve’s circuit is shorted to a positive…

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This diagnostic trouble code (TCU 524107.05) 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 the hydrostatic unit. This indicates that the circuit of the proportional solenoid valve is open. If diagnostic trouble code TCU 524108.05 is also stored,…

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This diagnostic trouble code (TCU 524107.04) 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 the hydrostatic unit, and a voltage drop at the proportional solenoid valve is also detected. This typically indicates a short to ground in the…

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This diagnostic trouble code (TCU 524107.03) is generated if the control unit registers resistance and voltage at the proportional solenoid valve Y2 that do not correspond with the commanded operating status of the hydrostatic unit. This indicates a general problem with battery voltage or that the proportional solenoid valve’s circuit is shorted to a positive…

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This diagnostic trouble code (TCU 523917.08) is generated if a difference in frequency is detected between the two sensor output signals for hydrostatic speed. This discrepancy indicates that the speed in channel 2 is lower than in channel 1, suggesting a potential issue with the B62 sensor or its circuitry.

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This diagnostic trouble code (TCU 523917.04) 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 typically indicates a short to ground in the sensor circuit.

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This diagnostic trouble code (TCU 523917.03) 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…

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This diagnostic trouble code (TCU 523700.07) 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 discrepancy implies a problem with the transmission.

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This diagnostic trouble code (TCU 523652.11) is generated when the control unit detects an erroneous signal in the circuit of the control unit identification during initialization (control unit boot sequence after the ignition is switched ON). This suggests that the control unit may be connected to an incorrect wiring harness connector.

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This diagnostic trouble code (TCU 523438.02) is triggered if the control unit detects an EEPROM error. The EEPROM (Electrically Erasable Programmable Read-Only Memory) stores important configuration and calibration data, and an error in this memory can indicate data corruption or failure of the EEPROM component itself.

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This diagnostic trouble code (TCU 522976.02) is generated when an electronic malfunction is registered in the control unit. This indicates that the control unit has detected an internal error, which could affect the overall functionality of the system.

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