White paper

CAN bus troubleshooting methodology

Communication problems in CAN-based systems, along with their resulting system failures, can have a wide variety of causes. The cause can often be found quickly in newly installed systems since typical causes of trouble can be easily identified and eliminated. However, if the cause remains unclear after initial tests or if problems occur sporadically, then a structured approach is required for CAN bus troubleshooting since the complexity of modern systems and the large number of possible sources of error often make it difficult to isolate and eliminate faults.

Whitepaper - CAN troubleshooting methodology

This white paper provides guidelines for CAN bus troubleshooting, the systematic identification and elimination of faults in CAN and CAN FD systems.

Content overview

  • Relative frequency of faults.
  • Basic visual check without measurement equipment.
  • Checks using tools.
  • Potential differences and ground loops.
  • Analysis by oscilloscope.
  • Fault localization strategies.
  • Analyzing application-related faults using CAN analysis tools.

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