| 摘要 |
A process operates a communication network of a motor vehicle having a control device connected to a data bus. The process includes the steps of: a) determining a global supply voltage of the voltage source, b) checking whether the determined global supply voltage exceeds a specified upper voltage threshold or falls below a specified lower voltage threshold, c) providing information representing the determined global supply voltage and/or the exceeding or falling-below to control devices, d) when a fault is detected by a respective control device, checking by use of the provided information whether the global supply voltage exceeds or falls below the respective voltage threshold, and e) when an exceeding or falling-below the concerned voltage threshold by the global supply voltage is present, a respective control device, when detecting a fault, instead of information representing the detected fault, writes into its fault memory information representing the exceeding or falling-below the concerned voltage threshold by the global supply voltage as a possible cause of the fault. |
