This diagnostic trouble code (DTC), SSU 001504.09, is triggered when the information from the seat switch is not accepted on the CAN BUS after four attempts. This indicates a problem in the vehicle CAN BUS communication with the operator presence switch.

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This diagnostic trouble code (DTC), SSU 001504.07, is triggered if the seat switch reports “operator on seat” for longer than 25.5 hours without interruption. This indicates an invalid signal from the operator presence switch.

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This diagnostic trouble code (DTC), SSU 001079.04, is triggered if the power supply for the wheel angle sensor (WAS) drops below 4.75 volts for longer than 320 milliseconds. This indicates that the circuit may be open or experiencing a low voltage condition.

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This diagnostic trouble code (DTC), SSU 001079.03, is triggered if the power supply for the wheel angle sensor (WAS) exceeds 5.25 volts for longer than 320 milliseconds. This indicates an overvoltage condition in the steering angle sensor circuit.

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This diagnostic trouble code (DTC), SSU 000639.14, is generated when the control unit receives too many incorrect CAN BUS messages or detects a general problem in the connection to the vehicle CAN BUS. This indicates a communication issue with a significant number of incorrect messages on the CAN BUS network.

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This diagnostic trouble code (DTC), SSU 000639.13, is generated when the control unit receives a very high number of incorrect CAN BUS messages or detects a severe problem in the connection to the vehicle CAN BUS. This indicates a communication issue with a very high error rate on the CAN BUS network.

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This diagnostic trouble code (DTC), SSU 000639.12, is generated when the control unit receives too many incorrect CAN BUS messages or detects a general problem in the connection to the vehicle CAN BUS. This indicates a communication issue with a high error rate on the CAN BUS network.

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This diagnostic trouble code (DTC), SSU 000630.13, is saved if the previous calibration was not saved or the new SSU control unit has not been calibrated yet. This indicates that the SSU needs to be calibrated to function correctly.

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This diagnostic trouble code (DTC), SSU 000629.12, is triggered if the SSU control unit detects that too much time has elapsed (watchdog timeout). This indicates an internal timing issue within the SSU.

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This code is generated when the Steering System Control Unit (SSU) detects that it is in the process of updating software. This indicates that the SSU is undergoing a software update or loading new software.

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This diagnostic trouble code (DTC), SSU 000628.02, is triggered when a fault occurs within the internal module (EEPROM) of the control unit. This indicates an internal malfunction that can affect the overall performance and reliability of the control unit.

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