Fault diagnostic apparatus

Details Fault diagnostic apparatus Fault diagnostic apparatus

2006-02-28

2008-12-30

Lefkowitz, Edward (Department: 2855)

Thermal measuring and testing

Temperature measurement

Composite temperature-related paramenter

C374S109000, C374S145000, C701S034000

Reexamination Certificate

active

07470059

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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