| 摘要 |
<p>PURPOSE:To find a defective component and an abnormal terminal at the moment of the operation of the runaway preventing function of the chopper control circuit by comparing respective terminal voltages of the chopper control circuit with a previously stored voltage in normal operation. CONSTITUTION:When a computer 2 for control receives a runaway prevention signal sent by a runway preventing circuit, a scanning circuit 4 sends a scan signal and all terminal voltages right before the runaway prevention signal is generated are converted by an A/D converting circuit 5 into digital signals, which are stored in a memory 14. Those stored data are compared with data on all terminal voltages stored previously in a memory 13 corresponding to an accelerator angle in normal traveling and the defective component is estimated from the state of a terminal whose voltage is not normal. Then the estimated defective component and terminal number are displayed on a display part 6. When there are plural defective components and abnormal terminals, a defective component step-up switch 8 and an abnormal terminal step-up switch 9 are operated to call and display the abnormal components and terminals in order.</p> |
