| 摘要 |
A failure determination threshold value H<SUB>SH </SUB>used for making a failure determination for a control apparatus, for example, a lock-up clutch ( 26 ) by failure determining means ( 116 ) is corrected by failure determination threshold value correcting means ( 114 ) based on a continuation quantity q<SUB>NG</SUB>, for example, a duration t<SUB>NG</SUB>, of an operation state in which a predetermined failure precondition for the control apparatus mounted on a vehicle is satisfied. Therefore, a failure determination is performed by the failure determining means ( 116 ) using the failure determination threshold value H<SUB>SH </SUB>obtained in consideration of individual differences such as variations between vehicles. As a result, it is possible to prevent an erroneous determination regarding a failure, and to improve sensitivity of a failure determination.
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