What are the causes of Nissan CAN communication circuit failure?

[MacLeila]

Nissan CAN bus system failures are generally caused by the following three reasons: 1. Faults caused by the vehicle power supply system: The operating voltage of automotive electronic control modules is typically between 10.5-15.0V. If the power supply system provides abnormal operating voltage, it may cause temporary malfunctions in certain electronic control modules, leading to communication issues in the entire CAN bus system. 2. Link faults in the vehicle CAN bus system: Short circuits, open circuits, or physical changes in communication lines that cause signal attenuation or distortion can result in multiple electronic control units malfunctioning, rendering the CAN bus system inoperable. 3. Node faults in the vehicle CAN bus system: Nodes are electronic control modules in the CAN bus system, so node faults refer to faults in these modules. This includes software faults, such as defects or conflicts in transmission protocols or software programs, which can cause communication chaos or system failure, often occurring in batches; hardware faults usually involve failures in the electronic control module chips or integrated circuits, preventing the CAN bus system from functioning properly.