2002 BUICK CENTURY ECU

2-9 Rear-Door Child Security Locks
Your vehicle is equipped with rear-door child security
locks that help prevent passengers from opening the rear
doors of your vehicle from the inside. To use one of
these locks:
1. Open one of the rear doors.
2. On the inside of the rear
door will be a lock.
Insert your door key into
this lock and turn it
upward. This will
engage the safety lock.
To disengage the feature,
turn the lock downward.
3. Close the door.
4. Do the same thing to the other rear door lock.
The rear doors of your vehicle cannot be opened from
the inside when this feature is in use. If you want to
open the rear door when the security lock is on, unlock
the door from the inside and then open the door from
the outside.
Lockout Protection Feature
This feature prevents a driver who has left the key in the
vehicle's ignition from locking the doors by using the
power door locks while any door is open. The feature
works by disabling the power door locks when a key is
in the ignition and any door is open.
You may override the lockout protection feature by
holding the power door lock switch in the lock position
for more than three seconds while the key is in the
ignition and any door is open.
Remember, this feature can't guarantee that you'll
never be locked out of your vehicle. If you use the
manual door lock or if you don't leave the key in the
ignition, you could still lock your keys inside your
vehicle. Always remember to take your keys with you.
Leaving Your Vehicle
If you are leaving the vehicle, take your keys, open your
door and set the locks from inside. Then get out and
close the door. (Also see ªDelayed Lockingº in this
section for more information.)

2-11 Operation
Press UNLOCK once to
unlock the driver's door and
to turn on the interior lamps
(see ªIllumination on
Remote Activationº in the
Index for more details).
Press UNLOCK again within five seconds to unlock all
the doors. To lock all doors, press LOCK. To unlock the
trunk, press the button with the trunk symbol on the
remote keyless entry transmitter. The trunk will only
unlock if your transaxle is in PARK (P).Panic Alarm
This feature allows you to activate an alarm by pressing
the panic button on the remote keyless entry transmitter.
Your ignition must be off for the panic alarm to work.
When you press the panic button with the horn symbol on
the remote keyless entry transmitter, the headlamps will
flash, the horn will honk repeatedly, and the interior lamps
will illuminate, attracting attention if you need it. The
alarm will continue until one of the following occurs:

You press the panic button on the remote keyless
entry transmitter a second time,

the ignition is moved to RUN, or

an alarm period of about two minutes has elapsed.
Security Feedback
Security feedback provides audible and/or visible
feedback that a remote keyless entry lock or unlock
command has been received and executed. The ignition
must be off for this feature to work.
You may select one of four operating modes for reception
of a lock command. You may also select one of four
operating modes for reception of an unlock command.
The selection and programming of the lock and unlock
operating modes are independent of each other.

2-12
Programmable Modes
Your vehicle can be programmed to one of the
following modes.
Mode 1: No Verification
Mode 2: Horn Chirp only
Mode 3: Headlamp Flash only
Mode 4: Horn Chirp and Headlamp Flash
Before your vehicle was shipped from the factory, it
was programmed to Mode 3. The mode to which your
vehicle was programmed may have been changed since
it left the factory. To determine the security feedback
lock mode to which your vehicle is programmed or
to program your vehicle to a different mode, do
the following:
1. Close all doors and turn the ignition key to RUN.
2. Press and hold the power door lock switch in the
lock position.3. While holding the door lock switch in the lock
position, press and release the remote keyless
entry transmitter LOCK button. This will start the
customization mode. While in the customization
mode, the feature will sound the number of chimes
corresponding to the current lock mode. (If you do
not wish to change the current mode, you can either
exit the programming mode by following the
instructions listed here or program the next feature
available on your vehicle.)
4. Each additional press of the remote keyless entry
transmitter LOCK button will cause your vehicle to
advance the lock mode by one, starting from the
current lock mode.
5. If cycled beyond lock Mode 4, the vehicle will enter
Mode 1. When the door lock switch is released, the
vehicle will remain in the most recent lock mode.

2-13
Before your vehicle was shipped from the factory,
it was programmed to Mode 3. The mode to which
your vehicle was programmed may have been changed
since it left the factory. To determine the security
feedback unlock mode to which your vehicle is
programmed or to program your vehicle to a
different mode, do the following:
1. Close all doors and turn the ignition key to RUN.
2. Press and hold the power door lock switch in the
unlock position. While holding the door lock switch
in the unlock position, press and release the remote
keyless entry transmitter UNLOCK button. This will
start the customization mode. While in the
customization mode, the feature will sound the
number of chimes corresponding to the current
unlock mode. (If you do not wish to change the
current mode, you can either exit the programming
mode by following the instructions listed here or
program the next feature available on your vehicle.)3. Each additional press of the remote keyless entry
transmitter UNLOCK button will cause your vehicle
to advance the unlock mode by one, starting from the
current unlock mode.
4. If cycled beyond Mode 4, the vehicle will enter
Mode 1. When the door lock switch is released, the
vehicle will remain in the most recent unlock mode.
The mode you selected is now set. You can either exit
the programming mode by following the previous
instructions or program the next feature available on
your vehicle.
Disconnecting the vehicle's battery for up to a year will
not change the programmed mode for the lock and
unlock security feedback features.

2-15
During this procedure, the chime will sound, providing
you with feedback. In Mode 1, a single chime will
be heard if the delayed locking feature is disabled.
In Mode 2, two chimes will be heard if the feature is
enabled. When the door unlock switch is released, the
vehicle will remain in the most recent operating mode.
Disconnecting the vehicle battery for up to a year will
not change the programmed mode for the delayed
locking feature.
Illumination on Remote Activation
This feature provides interior lighting when a remote
keyless entry door unlock command is received and
executed by your vehicle. Your ignition must be off for
the illumination on remote activation feature to work.
The interior lamps will light until either the ignition is
turned to RUN or a period of 40 seconds has elapsed.
If a door is opened during this period, the timed lighting
will be canceled, and the interior lamps will remain on.Matching Transmitter(s) to Your Vehicle
Each remote keyless entry transmitter is coded to
prevent another transmitter from unlocking your vehicle.
If a transmitter is lost or stolen, a replacement can be
purchased through your dealer. Remember to bring any
remaining transmitters with you when you go to your
dealer. When the dealer matches the replacement
transmitter to your vehicle, any remaining transmitters
must also be matched. Once your dealer has coded the
new transmitter, the lost transmitter will not unlock your
vehicle. Each vehicle can have a maximum of four
transmitters matched to it.

2-18 Trunk Assist Handle (If Equipped)
Your vehicle may have an assist handle located on
the inside of the trunk lid toward the driver's side of
the vehicle.Pull down on the handle to lower the trunk lid.
Then close the trunk with your other hand. If the trunk
is not properly closed, the DOOR/TRUNK light will
appear in the message center of your instrument panel
cluster. See ªDOOR/TRUNK Lightº in the Index for
more information.
NOTICE:
The trunk assist handle was not designed to be
used to tie down the trunk lid or as an anchor
point when securing items in the trunk. Improper
use of the trunk assist handle could damage it.

2-19 Trunk Release Handle (If Equipped)
NOTICE:
The trunk release handle was not designed to be
used to tie down the trunk lid or as an anchor
point when securing items in the trunk. Improper
use of the trunk release handle could damage it.
There is a glow-in-the-dark trunk release handle
located inside the trunk on the latch. This handle will
glow following exposure to light. Pull the release handle
up to open the trunk from the inside.

2-20 Trunk Release Sensor TrapAlert
System
(If Equipped)
Your vehicle may have a sensor located on the underside
of the filler panel inside the trunk.The sensor is designed to open the trunk automatically.
If the sensor detects motion and a difference in
temperature in the trunk, the sensor will sound the horn
if the ignition is in OFF. There will be three short chirps
and a pause repeated for up to two minutes. After one
minute, the trunk latch will release. If the ignition is not
in OFF, the trunk latch will not release automatically
and the horn will not sound.
To cancel the horn alarm and automatically release
the trunk lid before two minutes are up, turn the
ignition to ON.
Do not cover the sensor with items you put into the
trunk or with add
-on accessory equipment. If the
sensor's field of view is blocked, it will not detect
motion and will not function properly.
Be sure to secure items in your trunk so that they
won't move around and cause the trunk to open.