| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel pressure sensor diagnostic device capable of determining an abnormality of a fuel pressure sensor. <P>SOLUTION: The fuel pressure sensor diagnostic device includes: a back leak temperature sensor 4 provided in a collection line 108 to detect the temperature of a fuel to be collected as the back leak temperature; and an abnormality determination unit 5 which determines abnormality of the fuel pressure sensor 106 when correlation between a present fuel pressure and the back leak temperature is separated by a threshold value or more from correlation between a past fuel pressure and the back leak temperature. <P>COPYRIGHT: (C)2012,JPO&INPIT |
