The link failure of the automobile CAN bus system: when the communication line is short-circuited, broken or the physical property changes, resulting in the attenuation or distortion of the communication signal, many electronic control units will not work properly, and the CAN bus system will not work.
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The node failure of the automobile CAN bus system: The node is the electronic control module in the automobile CAN bus system, so the node failure is the fault of the electronic control module. Including software failure, that is, there are defects or conflicts in the transmission protocol or software program, which makes the communication of the automobile CAN bus system confused or unable to work, such failures usually occur in batches; Hardware failure is usually the electronic control module chip or integrated circuit failure, resulting in the car CAN bus system can not work properly