| 摘要 |
<p>PROBLEM TO BE SOLVED: To analyze the cause of a fault more easily and accurately on the basis of the detection value of a sensor. SOLUTION: The device has a first control unit U1 for performing a fault diagnosis by controlling the engine, etc., a second control unit U2 for performing a data memory control and a third control unit U3 for receiving vehicle outside information on weather, the amount of rainfall, traffic condition, etc. When an IG switch is turned on, the detection values of a sensor regarding the engine rotation speed, the vehicle speed, etc., are, together with a failure code, addressed onto both of the memories M1, M2, then updated and stored. When a fault detection related event like lighting of a warning lamp occurs, the vehicle outside information is received, addressed onto the first memory M1, and stored therein, then writing onto the first memory M1 is prohibited. Afterward, the detection value of the sensor is addressed onto the second memory M2, updated and stored. When an event occurs, the vehicle outside information is received, addressed onto the second memory M2, updated and stored, then writing onto the second memory M2 is prohibited.</p> |
