During the maintenance process, you should first check the specific fault symptoms, initially analyze the possible causes according to the fault symptoms and the network structure diagram, and then use the relevant diagnostic instruments for diagnosis, and formulate relevant maintenance plans according to the diagnosis results. Have a clear idea and a clear goal.
Then find the specific fault location and cause, and at the same time find the fault point in combination with the corresponding detection method and measurement results, so as to completely eliminate the fault.
Since the CAN network adopts a variety of protocols, the port of each control module has a standard voltage under normal conditions, so the voltage measurement method can be used to judge whether the line has problems such as short circuit to ground or power supply, short circuit between phase lines, etc.