Shutter device for an air inlet of a vehicle

A shutter device for an air inlet of a vehicle, said shutter device (1) comprising:

• a frame (2),
• a plurality of flaps (30, 31, 32, 33, 34, 35, 36, 37, 38, 39) pivotably coupled to said frame (2) and configured to pivot between a closed position and an open position,
• an actuator (5),
• a transmission part (4) coupled to the plurality of flaps (30, 31, 32, 33, 34, 35, 36, 37, 38, 39) and configured to transmit a movement of the actuator (5) to said flaps (30, 31, 32, 33, 34, 35, 36, 37, 38, 39), and
• a diagnostic system which allows an absence of at least one of the plurality of flaps (30, 31, 32, 33, 34, 35, 36, 37, 38, 39) to be detected during an evaluation process which is performed when the plurality of flaps (30, 31, 32, 33, 34, 35, 36, 37, 38, 39) pivot from the closed position to the open position and/or from the open position to the closed position,
• wherein the diagnostic system comprises transmission elements (60, 61, 62, 63, 64, 65, 66, 67, 68, 69) associated with the plurality of flaps (30, 31, 32, 33, 34, 35, 36, 37, 38, 39) which cooperate with one another, causing a concatenated force transmission, such that said diagnostic system detects the absence of at least one flap of the plurality of flaps (30, 31, 32, 33, 34, 35, 36, 37, 38, 39) when the concatenated force transmission is interrupted or altered by the absence of the transmission elements (60, 61, 62, 63, 64, 65, 66, 67, 68, 69) associated with said plurality of flaps (30, 31, 32, 33, 34, 35, 36, 37, 38, 39).