Fault diagnostic apparatus
First Claim
1. A fault diagnostic apparatus for diagnosing a fault of a temperature detector for detecting a temperature of an object to be examined, comprising:
- a fault diagnostic device for diagnosing a fault of the temperature detector based on a change in temperature detected by the temperature detector in a situation where a parameter of a chief source of heating the object to be examined decreases.
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Accused Products
Abstract
A fault diagnostic apparatus enables to improve estimate accuracy of 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 for diagnosing a fault of a water temperature sensor for detecting a temperature of cooling water comprises 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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Citations
12 Claims
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1. A fault diagnostic apparatus for diagnosing a fault of a temperature detector for detecting a temperature of an object to be examined, comprising:
a fault diagnostic device for diagnosing a fault of the temperature detector based on a change in temperature detected by the temperature detector in a situation where a parameter of a chief source of heating the object to be examined decreases.
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2. A fault diagnostic apparatus for diagnosing a fault of a temperature detector for detecting a temperature of an object to be examined,
wherein the object to be examined is mounted on a vehicle, the fault diagnostic apparatus comprising: -
a fault diagnostic device for diagnosing a fault of the temperature detector based on a change in temperature detected by the temperature detector in a situation where a temperature of an internal combustion engine to be a chief source of heating the object to be examined decreases, wherein a case of an IG switch being in the off position is judged as being in a situation where the temperature of the internal combustion engine decreases. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification