can线故障特点，1、干扰 2、对地短路 3、对电源短路 4、互短。 所以只有搞明白网络的拓扑图还有终端电阻，剩下的就是线路模块本身 最后即使是模块也要确定供电接地网络唤醒线，基本故障点就在这一块 :D Translation: Can line fault characteristics, 1. Interference 2. Short circuit to ground 3. Short circuit to power supply 4. Short to each other. So only to understand the topology of the network and...