| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an abnormality detection circuit of a fuel injection device and an abnormality detection program, which can maximally accurately estimate the presence of an abnormality of the fuel injection device while reducing a circuit scale to the minimum.SOLUTION: When an MPU 2 holds a constant current transistor T2 at the upstream side in an off-state, it is estimated (determined) that an abnormality exists on condition that a voltage of a terminal IN1 becomes "H" different from "L" at a normal time (S3: Hi). At this time, the MPU 2 distinguishes a kind of the abnormality by performing a detection sequence A. Furthermore, when the MPU 2 controls the constant current transistor T2 to an on-state from the off-state, it is estimated (determined) that the abnormality exists on condition that the voltage of the terminal IN1 is not changed to "H" from "L".</p> |
