Patent ID: 11905906
Assignee: HITACHI ASTEMO, LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H | IPC F

Claim 7:
8. A method of controlling a fuel injection device, comprising:
turning off a high-side driver before starting an engine;
operating a pre-driver to output a gate signal to a low-side driver;
monitoring the gate signal output to the low-side by a CPU via a voltage drop circuit;
turning off the low-side driver;
operating the pre-driver to output a gate signal to the high-side driver;
monitoring the gate signal output to the high-side by the CPU via the voltage drop circuit; and
diagnosing a pre-driver reset mechanism of the pre-driver based on a state of each of the gate signals when the pre-driver is reset to the low-side driver and when the pre-driver is reset to the high-side driver.