Abnormality detection device

Abstract

To provide an abnormality detection device that can detect an abnormality in a signal line of an ignition switch while suppressing cost increases such as an increase in complexity of control or an increase in scale.SOLUTION: An abnormality detection device detects an abnormality in a signal line connecting an output of a vehicle's ignition switch and a battery pack. The abnormality detection device includes a monitoring unit that monitors a first signal indicating a voltage of the signal line, a second signal indicating an on / off state of the ignition switch communicated over the vehicle' network, and a third signal indicating the on / off state of the ignition switch output by the vehicle's shift-by-wire system, and a determination unit that determines the presence or absence of an abnormality in the signal line based on the first signal, second signal, and third signal monitored by the monitoring unit.SELECTED DRAWING: Figure 1

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