JPS6337743B

PURPOSE:To prevent miss setting of theft preventer due to erroneous function of unlock detection switch caused through over-turning of key cylinder in the unlocking direction when drawing a key, by providing means for releasing function of locking operation confirming section only when unlocked state has been detected during operation of timer means provided in locking operation confirming means. CONSTITUTION:Locking operation confirming means A will confirm locking operation of key cylinder fixed to the chassis outer shell open/close section such as a trunk. With correspondence to confirmation of locking operation by means of said means A, theft prevention controlling section B is set to unauthorized intrusion waiting state while reset by means of reset operation controlling means C to detect unauthorized intrusion on the basis of open/close signal from open/ close state detecting means D fixed to the door only under unauthorized intrusion waiting state.