| 摘要 |
PURPOSE: A main relay control circuit of a vehicle is provided to improve the driving stability of a vehicle by maintaining on-state of a main relay regardless of errors of a microcomputer. CONSTITUTION: One end of a main relay(11) is connected to power. A microcomputer(12) controls on/off operation of the main relay. The anode of a thyristor(13) is connected to the other end of the main relay. The cathode of the thyristor is grounded. The gate of the thyristor is connected to the first output signal of the microcomputer. The collector of a transistor(14) is connected to the other end of the main relay. The emitter of the transistor is grounded. The gate of the transistor is connected to the second output signal of the microcomputer.
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