Ive recently purchased 2001 civic EX. It has remote control unit to lock/unlock the doors which is quite good. My question is this: when i press unlock button in the remote control unit, car unlocks the driver door and flashes all 4 turn signals but does not make sound at all. During locking it doesn't make any sound either. Hard to know if its locked or unlocked sometimes. Shouldn't it sound when i press unlock button on remote control unit with flashing signals? Mine doesn't make any noise at all. Is this normal or is it supposed to make noise when the unlock button is pressed? It didn't come with owners manual so i can't look it up in it. Any help is appreciated.