Grille shutter apparatus

A grille shutter apparatus, comprising:

• a shutter mechanism including a plurality of movable fins and at least one connection mechanism independently arranged to connect every two of the movable fins adjacent to one another, the shutter mechanism making the movable fins operate in conjunction with one another;
• a control portion controlling a flow rate of air flowing from a grille opening portion, formed at a front portion of a vehicle body, into the vehicle body on a basis of opening and closing operations of the shutter mechanism;
• a first detection portion detecting an operational state of the shutter mechanism on a basis of an operation of the movable fin corresponding to the input portion of driving force;
• a second detection portion detecting the operational state of the shutter mechanism on a basis of the operation of the movable fin corresponding to the most downstream portion of the serially-arranged driving force transmission path formed at the shutter mechanism;
• and
• an abnormality determination portion determining an abnormal state of the movable fins in a case where detection results at the first and the second detection portions differ from one another.