| 摘要 |
PROBLEM TO BE SOLVED: To provide an abnormality diagnostic device for a vehicle performing abnormality diagnosis of a connection state of a pair of members connected with each other with high reliability while avoiding wrong diagnosis due to an accidental factor even if the connection state fluctuates between a normal connection state and a state different from the normal connection state. SOLUTION: An electronic control device increments the number of times of disconnection and connection signal fluctuation C by 1 (step S140) when it is determined that output disconnection and connection signal of piping fluctuates. Temporary abnormality is determined, defining that abnormality in the connection state of the piping occurs (step S170), when abnormality determination conditions including a condition that the number of times of disconnection and connection signal fluctuation C is not less than a prescribed number of times Cp (step S160: YES) are satisfied during one trip. COPYRIGHT: (C)2011,JPO&INPIT
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