Method and apparatus for isolating fault in controller area network

Abstract

A controller area network (CAN) includes a plurality of CAN elements comprising a communication bus and a plurality of controllers. A method for monitoring includes periodically determining vectors wherein each vector includes inactive ones of the controllers detected during a filtering window. Contents of the periodically determined vectors are time-filtered to determine a fault record vector. A fault on the CAN is isolated by comparing the fault record vector and a fault signature vector determined based upon a network topology for the CAN.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 61 / 878,538, filed September 16, 2013, which is hereby incorporated by reference. technical field [0003] This disclosure relates to communication in a controller area network and fault isolation related thereto. Background technique [0004] The statements in this section merely provide background information related to the present disclosure. Accordingly, such statements are not intended to constitute admissions of prior art. [0005] Vehicle systems include multiple subsystems including, as examples, engine, transmission, ride / handling, braking, HVAC, and occupant protection. Multiple controllers can be used to monitor and control the operation of the subsystems. The controller may be configured to communicate via a controller area network (CAN) to coordinate operation of the vehicle in response to operator commands, vehicle operating states, a...

AI Technical Summary

Problems solved by technology

Such detection systems are often unable to identify the root cause of the failure and cannot distinguish transient from intermittent failures

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