Diagnostic system and method for processing continuous and intermittent faults
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United States of America Patent
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May 15, 2012
Grant Date -
Aug 4, 2011
app pub date -
Feb 2, 2010
filing date -
Feb 2, 2010
priority date (Note) -
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Abstract
A diagnostic system diagnoses a device and includes fault declaring module that selects one of a normal control mode, a temporary default action and a permanent default action. A counter module tracks a first number of successive test samples, a second number of failed samples that occur during the successive test samples, a third number of successive failed samples, a fourth number of failed samples, and a fifth number of samples since a last failed sample. The fault declaring module transitions to a temporary default action when at least one of the third number of successive failed samples is greater than a first value and the fourth number of failed samples is greater than a second value. The fault declaring module transitions to a permanent default action that is different than the temporary default action when the second number of failed samples is greater than a third value.
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