VEHICLE CONDITION DETERMINATION DEVICE AND AUTOMOBILE

摘要

PROBLEM TO BE SOLVED: To provide an automobile provided with a vehicle condition determination device capable of accurately determining vehicle conditions.

SOLUTION: CPU of a microcomputer 10 of the vehicle condition determination device 12 measures the lowest voltage Vst of lead battery 1 at a time of engine start via a voltage measure part 3, and measures the maximum current Ist flowing to the lead battery 1 at the time of engine start via a current sensor 4, and resistance of a vehicle ruled by a starter motor is directly calculated by dividing the lowest voltage Vst by the maximum current Ist. Resistance of the vehicle is stored in EEPROM every predetermined time. The CPU calculates average value of a plurality of resistance values stored in the EEPROM, and determines that abnormality exists in the vehicle if deviation of the latest vehicle resistance from the calculated average value exceeds predetermined ratio (for instance ±15%).

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