Lock (Transmitter)

When a lock command is received from the transmitter, the BCM provides battery voltage through circuit 195 to the LOCK relay in the IPFB. The LOCK relay coil, grounded by circuit 550, energizes and causes the relay contacts to close. When the relay contacts close, battery voltage is provided through the LOCKS fuse, through the relay, and out of the IPFB to each of the door lock motors. The driver door lock motor is grounded in the BCM through circuit 694. The other door lock motors are grounded through the UNLOCK relay circuit 550.

The Saturn Security System is automatically enabled when the LOCK button is pressed on the transmitter. The LOCK button can be pressed a second time for a horn chirp confirmation. If the LOCK button is pressed and any of the doors or trunk are open, the horn will sound 3 long horn chirps.

When the Saturn Security System is activated, the horn will chirp for 10 seconds (Pre-alarm). Following this 10 second pre-alarm warning, the horn will cycle at 1 Hz with 250 ms On time, the Daytime Running Lamps (DRL) and the dome lamp will flash (full alarm). The DRL lamp or dome lamp will not flash during the 10 second pre-alarm. Full-alarm will continue until any button is pressed on the transmitter, or 2 minutes have passed, whichever occurs first.