Patent ID: 7275009

Claim:
A fault diagnosis apparatus for diagnosing a fault that occurs in an apparatus having a plurality of drive mechanisms each including a driving component activated by current supply and at least a power transmission component that transmits a driving force of the driving component to another component without receiving current supply, comprising: a second signal detection unit that detects a second signal indicating an operation state of each drive mechanism on a normal operation state in which the plurality of driving components and the plurality of power transmission components are operated; a first signal detection unit that detects a first signal indicating an operation state of each element of each drive mechanism within a predetermined period in a state where each drive mechanism individually activates; a second determination unit that determines whether the drive mechanism has a fault or not based on the second signal detected by the second signal detection unit; and a fault diagnosis unit that executes the fault diagnosis on each component of the drive mechanism determined that the drive mechanism has a fault by the second determination unit.