Answer Back (Horn Signaling) On/Off Selection: Notes
WARNING: This page is about a different car, the 2002 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
Using the horn, the system will audibly signal when doors lock and unlock. To activate the answer back function, push the transmitter's UNLOCK/DISARM button, then simultaneously push for more than 2 seconds the LOCK/ARM and UNLOCK/DISARM buttons. Push the buttons again to deactivate the audible signal.