Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
December 30, 2008
Patent Application Number
11363183
Date Filed
February 28, 2006
Patent Primary Examiner
Patent abstract
A fault diagnostic apparatus is provided that enables improving estimate accuracy of the temperature of an object to be examined and to improve fault diagnosis accuracy of a temperature detector for detecting a temperature of the object to be examined. The fault diagnostic apparatus is for diagnosing a fault of a water temperature sensor for detecting a temperature of cooling water and includes a fault diagnostic device for diagnosing a fault of the water temperature sensor based on a change in temperature detected by the water temperature sensor in a situation where a parameter to be a chief source of heating the cooling water (such as an engine temperature) decreases.
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