| 摘要 |
<p>While a microcomputer (100A) is executing a process of self-diagnosis A, the second diagnosis pulse output means (110B) of a microcomputer (100B) of a system B is not used at all. At this moment, the microcomputer (100B) of the system B does not execute any processes related to at least the self-diagnosis A. Thus, the independencies of the diagnostic processes (self-diagnoses A/B) can be ensured by shifting the timings from each other at which to output the diagnosis pulses between the systems A and B. Accordingly, the self-diagnosis A can be used to simply test, from the side of the system A, the independencies of the systems A and B. Additionally, the first diagnosis pulse output means (110A) outputs a first group of diagnosis pulses in parallel at the same time. Thus, there is no need of performing a cyclic control of external input devices, so that the independencies of the systems A and B can be tested in a short time.</p> |
