The actuator control device supplies the drive circuit 23, the constant current circuit 26, the drive power supply Vdrv, and a power supply voltage so that a detection current equal to the drive current flows to the actuator 13 in a predetermined period within the current application period. The resistance detection power source Vdet, the detection resistor RL, and the changeover switch 22 that connects the resistance detection power source Vdet to the drive circuit 23 in a predetermined period and connects the drive power source Vdrv to the drive circuit 23 outside the predetermined period. And a changeover switch 25 that connects the detection resistor RL to the drive circuit 23 in a predetermined period and connects the constant current circuit 26 to the drive circuit 23 outside the predetermined period, and an abnormality in the actuator 13 in the predetermined period. FPGA 28 to detect.アクチュエータ制御装置は、駆動回路２３と、定電流回路２６と、駆動用電源Ｖｄｒｖと、電流印加期間内の所定の期間において、駆動電流と等しい検知用電流がアクチュエータ１３に流れるよう電源電圧を供給する抵抗検知用電源Ｖｄｅｔと、検知用抵抗ＲＬと、所定の期間において、駆動回路２３に抵抗検知用電源Ｖｄｅｔを接続し、所定の期間外において駆動回路２３に駆動用電源Ｖｄｒｖを接続する切替スイッチ２２と、所定の期間において、駆動回路２３に検知用抵抗ＲＬを接続し、所定の期間外において駆動回路２３に定電流回路２６を接続する切替スイッチ２５と、所定の期間において、アクチュエータ１３の異常を検出するＦＰＧＡ２８と、を有する。
