| 摘要 |
PROBLEM TO BE SOLVED: To obtain a new inspecting method which measures the source current flowing out of a power source and detecting a fault of a signal line in the digital electronic computer circuit by executing a inspection program, which generates variation of the source current and inspecting the fault of the signal line by measuring the source current. SOLUTION: A 1st inspection program executed by a microprocessor 10 of the electronic computer circuit to be inspected, after outputting a signal for generating the effects of a short-circuit fault, is stored in a ROM 11 for 1st inspection. Then when the 1st inspection program is run, while a couple of signal lines 12 an 13 are short-circuited, the fault is initiated and then a time wait routine is inserted. Once the fault is initiated, a peak-holding circuit holds the peak value of the source current. When the held peak value exceeds a set value, it is deemed tat the source current has become abnormal, and a short-circuit fault is decided. The wait time of the time wait routine is so set, that it is not less than the set value. |
