| 摘要 |
PURPOSE:To realize the automatic test diagnosis of a diagnostic processor by providing a control interface bus where plural diagnostic processors are connected in common with each other. CONSTITUTION:When both diagnostic processors 11 and 12 are working normally, the processor 11 controls a diagnostic interface control circuit 13 via a control interface bus 103 and performs the test diagnosis of an information processor 2-i. While the processor 12 controls a diagnostic interface control circuit 14 via a control interface bus 103 and performs the test diagnosis of an information processor 3-i. If the processor 12 has a trouble and an abnormal state, the operation of the processor 12 is stopped. Then the processor 11 controls both circuits 13 and 14 via the bus 103 and performs the test diagnoses of both processors 2-i and 3-i. At the same time, the processor 11 also performs the test diagnosis of the faulty processor 12 by the test diagnostic procedure programmed previously. |
