Most diagnostic trouble codes relate to the computer input voltages or signals and must exist for a specific period of time to be recognized as a hard fault.
绝大多数的诊断故障码与计算机的输入电压或信号有关，并且作为一种永久性故障存在一段时间。
This requires vehicle manufacturers to provide on-demand access to diagnostic information such as diagnostic Trouble Codes (DTC) and various sensor readings.
这就要求汽车制造商提供所需诊断信息，如诊断故障代码(DTC)和各种传感器读数。
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