| 摘要 |
The fault diagnosis apparatus includes an electronic acceleration sensor and mechanical acceleration sensor. Strength of an impact of the vehicle is calculated based on the acceleration detected by the electronic acceleration sensor. A first comparator compares the calculated strength of the impact to a predetermined strength, and a second comparator compares the acceleration detected by the mechanical acceleration sensor to a predetermined acceleration. When the first comparator indicates that the strength of impact is greater than or equal to the predetermined strength and the second comparator indicates that the acceleration detected by the mechanical acceleration sensor is greater than the predetermined acceleration, a crew protecting apparatus operates. On the other hand, when the second comparator indicates that the acceleration detected by the mechanical acceleration sensor is less than or equal to the predetermined acceleration, a fault diagnosis of the crew protecting apparatus is carried out. Furthermore, when the second comparator indicates that the acceleration detected by the mechanical acceleration sensor becomes greater than the predetermined acceleration during the fault diagnosis, the fault diagnosis process stops and the crew protecting apparatus is placed in a state capable of being operated. |
