| 摘要 |
PROBLEM TO BE SOLVED: To quickly discover a new failure factor caused during the maintenance work of a vehicle and a latent failure factor. SOLUTION: Whether or not data of a backup RAM is normal is investigated (S2). When the data is not normal, a decision threshold is changed and set to an abnormality decision threshold easier to detect an abnormality than a normal time decision threshold (S5). Whether or not a normal decision is performed is investigated by a diagnosis using the abnormality decision threshold changed to easily detect the abnormality (S7). When the normal decision is performed, whether or not the normal decision is continued for a prescribed time is investigated (S8). When the normal decision is continued for the prescribed time, a normal time abnormality decision threshold is set (S3). As a result, the new failure factor caused during the maintenance work of the vehicle and a latent failure factor can be quickly discovered. COPYRIGHT: (C)2011,JPO&INPIT
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