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Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

Topic Posted by: Reliability & Maintainability Forum ( )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998

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Original Message:

Posted by: Ke Liu
Date posted: Fri Jun 8 16:23:14 US/Eastern 2001
Subject: CAN Bus Reliability
Does anybody know the possible failure modes associated with the CAN (controller area network) system? Thanks in advance.


Subject: CAN Bus System Failure Modes
Reply Posted by: Bruce Dudley ( )
Organization: Reliability Analysis Center
Date Posted: Tue Jun 12 9:16:25 US/Eastern 2001
CAN (Controller Area Network) is a serial bus system developed by Robert Bosch and is suited for networking “intelligent” devices such as sensors and actuators within a system or subsystem. A transmitter sends a message to all CAN nodes called broadcasting. Each node decides on the basis of the identifier received whether it should process the message or not. The identifier also determines the priority that the message enjoys in competition for bus access. Today there are more than 50 CAN protocol controller chips from more than 15 manufacturers. In the Reliability Analysis Center report “Failure Mode/Mechanism Distributions (FMD)”, controller chips have failure modes of following distribution: Shorted 35% Parametric failure 28% Opened 21% Functional Failure 11% Bond Failure 3% No Defect 2%

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