| 摘要 |
PROBLEM TO BE SOLVED: To prevent a battery from deteriorating because a current keeps flowing into a microcomputer or the like in a case a fault occurs due to some cause.SOLUTION: Assume that at a time t10, ignition switch information 6a is held low (A) and a control signal 11a is held high (B). If count information 12a of an internal timer reaches a set value, a signal control circuit controls the control signal 11a so as to bring the control signal to low (B). Accordingly, a main relay 9 is controlled to be turned off, and a second voltage generation circuit 10 is stopped (H). Thus, since the second voltage generation circuit 10 is stopped, even if the control signal 11a is held high because of some fault, battery exhaustion can be deterred. |
