| 摘要 |
A power supply control device is provided which supplies electric power to an automobile electronic control system, including a microcomputer, which controls devices on an automobile, such as a gear transmission, a clutch, etc. A power supply for the electronic control system is connected to a self-holding device for continuously supplying electric power to the electronic control system even if a key switch is turned off in error, resulting in a power cutoff. When the power is cut off inadvertently or intentionally, the electronic control system detects such a power cutoff, and effects a predetermined control operation. Upon completion of the operation, the electronic control system turns off the self-holding device to cut off the electric power supplied to the electronic control system.
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