| 摘要 |
PROBLEM TO BE SOLVED: To improve the reliability of malfunction diagnosis device by diagnosing a fuel level sensor according to the fuel level. SOLUTION: In a malfunction diagnosis device for fuel level sensor, a fuel swing amplitude for anomaly diagnosis judgment is set by fuel level average value gradually increasing and decreasing according to the fuel level. A control means provided with an anomaly diagnosing part for diagnosing anomaly in a fuel level sensor by comparing the fuel swing amplitude for anomaly diagnosis judgment and fuel swing amplitude of fuel level id provided. A control means provided with an anomaly diagnosis part for setting fuel level an anomaly diagnosing part for diagnosing anomaly in a fuel level for anomaly diagnosis judgment using virtual gain different in fuel level average value is provided. Furthermore, a control means provided with an anomaly diagnosis part for setting fuel level for anomaly diagnosis judgment and fuel level average value according to different fuel level gain is provided.
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