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 RIPFB. The LOCK relay coil, grounded by circuit 450, 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 RIPFB to each of the door lock motors. The driver door lock motor is grounded through the driver unlock relay in the RIPFB circuit 450. The other door lock motors are grounded through the other doors relay in the RIPFB circuit 450.

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 twice, and any of the doors are open, the horn will not chirp.

When the Saturn Security System is activated, the BCM will chime at 200 chimes per minute for 10 seconds. (Pre-alarm). Following this 10 second pre-alarm warning, the horn will cycle at 1 Hz with 200 ms On time, and the Daytime Running Lamps (DRL) will flash (full alarm) The DRL 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.