Remote Keyless Entry (RKE) Circuit Description

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.

LOCK (SWITCHES)
The lock operation of the driver's and passenger's door switches is the same as when operated by the transmitter, except battery voltage is provided to the switches through the body fuse.

FUEL DOOR LOCK AND UNLOCK (TRANSMITTER AND SWITCHES)
The fuel door lock and unlock operation is controlled by a fuel door lock motor located in the fuel door latch assembly. The operation of the lock and unlock functions is the same as the passenger door unlock and lock functions. The fuel door lock motor is connected between the door lock relay and other doors unlock relay by circuits 294 and 295.

UNLOCK (TRANSMITTER) DRIVER'S DOOR
When an unlock command is received from the transmitter, the body control module provides battery voltage through circuit 1391 to the driver door UNLOCK relay in the RIPFB. The UNLOCK relay coil, grounded by circuit 450, energizes and causes the relay contacts to close. When the contacts close, battery voltage is provided through the LOCKS fuse, through the relay, and out the RIPFB to the driver door motor.

The Saturn Security System is disabled when the UNLOCK button is pressed. If the horn chirp mode is enabled, the horn will chirp twice for confirmation that the Saturn Security System is disarmed.

UNLOCK (TRANSMITTER) ALL DOORS EXCEPT DRIVER'S DOOR
When a second unlock command is received from the transmitter within five Seconds of the first unlock command, the remote keyless entry module provides battery voltage through circuit 194 to the OTHER DOORS UNLOCK relay in the RIPFB. The UNLOCK 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 (in opposite direction of "lock"), except the driver's door lock motor. The door lock motors are grounded through the LOCK relay by the RIPFB ground circuit 450.

UNLOCK (SWITCHES)
The unlock operation of the driver's and passenger's door switches, excluding the driver's door unlock, is the same as when operated by the transmitter, except battery voltage is provided by either switch to the UNLOCK relay instead of by the remote keyless entry module. The driver's door unlock signal is detected by the body control module, through circuit 780. The remote keyless entry module provides battery voltage to the driver's door lock motor (in opposite direction of "lock").

DECKLID/LIFTGATE
The circuit description for the decklid and liftgate is explained on the facing pages of chart 4 and chart 5.

DOME LAMP
The circuit description of the dome lamp is explained in the "Interior Lamps,"

HORN
The circuit description of the horn is explained in the "Horn System,"