| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technology for enabling appropriate replacement of in-vehicle equipment. <P>SOLUTION: According to the result of a comparison between the sensor value of a sensor mounted on the vehicle and the normal threshold, a determination is made whether there is an abnormality in the sensor (S20). If the abnormality is found in the sensor, a failure sign evaluation index If is calculated for evaluating a failure sign of the sensor using the duration time of abnormality occurrence and the difference (sensor normal threshold difference Ds) between the sensor value and the normal threshold (S30, S40, S90). Subsequently, the calculated failure sign evaluation index If is memorized, and the failure sign of the sensor is detected using the failure sign evaluation index If. <P>COPYRIGHT: (C)2012,JPO&INPIT |
