2004 BUICK LESABRE ECU

If your vehicle is equipped with the DIC, the numbers on
the back of your transmitter correspond to DRIVER #1
and DRIVER #2 on the DIC. For more information
seeDriver Information Center (DIC) on page 3-45.
W(Unlock):Press this
button to unlock the
driver’s door. Press it again
within ve seconds to
unlock all of the doors. See
“Security Feedback”
later in this section.
Pressing the unlock button may also illuminate the
interior lamps. See “Entry Lighting” underInterior Lamps
on page 3-17.
Q(Lock):Press this button to lock all doors.
V(Trunk):Press this button to unlock the trunk
when the ignition is in OFF. It will also work when the
ignition is on, but only while the transaxle is in PARK (P)
or NEUTRAL (N).
L(Instant Alarm):Press this button to make the
horn sound and the headlamps and taillamps ash for
up to 30 seconds. This can be turned off by pressing the
instant alarm button again or by turning the ignition
on. If your vehicle is equipped with the content
theft-deterrent feature, you may also turn off the instant
alarm by unlocking the vehicle with a key.
Personalization Features
The following features, if available on your vehicle, can
be programmed to each driver’s preference.
Automatic Door Locks:This feature programs
your door locks to automatically lock or unlock
when shifting in and out of PARK (P).
Security Feedback:This feature provides feedback
to the driver when the vehicle receives a command
from the remote keyless entry transmitter.
2-6

Delayed Locking:This feature allows for a ve
second delay in locking the doors after the
closing of the last door.
Perimeter Lighting:This feature provides for the
daytime running lamps (DRL), parking lamps and
the back-up lamps to turn on when the unlock
button on the remote keyless entry transmitter is
pressed.
For more detailed information and programming
instructions, refer toDIC Vehicle Personalization on
page 3-50for each individual feature listed above.
Security Feedback
This feature provides feedback when the vehicle
receives a command from the remote keyless entry
transmitter. Feedback is only provided if all doors are
closed, the ignition is off and the Retained Accessory
Power (RAP) is inactive. One of the following modes
may be selected for each transmitter:
Mode 1:No feedback when locking or unlocking
vehicle.
Mode 2:Parking lamps, back-up lamps and the DRL
exterior lamps will ash twice when unlocking the vehicle
and ash once when locking the vehicle.Mode 3:Horn chirps when all doors are unlocked
(second time the button is pressed) and when locking
the vehicle.
Mode 4:Parking lamps, back-up lamps and the DRL
exterior lamps will ash twice each time the unlock
button is pressed; the horn chirps when all doors are
unlocked. Parking lamps and the DRL exterior
lamps ash once and the horn chirps when locking the
vehicle.
The exterior lamps will not ash if the manual parking
lamps are on.
If your vehicle is equipped with the DIC, you must
program this feature using it. SeeDriver Information
Center (DIC) on page 3-45.
If your vehicle is not equipped with the DIC, do the
following to change to another mode:
1. Close all the doors and turn the ignition on. Keep
all doors closed throughout this procedure.
2. Press and hold LOCK on the driver’s power door
lock switch throughout this procedure. All the
doors will lock.
3. Press the trunk button on the transmitter. The
security feedback will remain in its current mode.
The horn will chirp as feedback.
2-7

4. Press the trunk button again. Each time the trunk
button is pressed, the security feedback will
advance to the next mode, and the horn will chirp.
5. Release the power door lock switch. The security
feedback will remain in the most current mode
selected.
This procedure only changes the mode for the
transmitter used to change this setting.
To verify the mode selected, remove the key from the
ignition and close all of the doors after you’ve exited the
vehicle. Press the lock button on the transmitter to be
veried and conrm the appropriate feedback.
Repeat with the unlock button.
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 toyour 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.
See your dealer to have additional transmitters matched
to your vehicle.
Battery Replacement
Under normal use, the battery in your remote keyless
entry transmitter should last about four years.
You can tell the battery is weak if the transmitter won’t
work at the normal range in any location. If you have
to get close to your vehicle before the transmitter works,
it’s probably time to change the battery.
Notice:When replacing the battery, use care not to
touch any of the circuitry. Static from your body
transferred to these surfaces may damage the
transmitter.
2-8

Rear Door Security Locks
Your vehicle is equipped
with rear door security
locks that prevent
passengers from opening
the rear doors of your
vehicle from the inside.
To use one of these locks, do the following:
1. Open the rear door you want to lock.
2. Move the lever located on the inside door edge, all
the way to the lock symbol.
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.
To open a rear door when the security lock is on, do the
following:
1. Unlock the door.
2. Open the door from the outside.If you don’t cancel the security lock feature, adults or
older children who ride in the rear seat won’t be able to
open the rear door from the inside. You should let
adults and older children know how these security locks
work, and how to cancel the locks.
To cancel the rear door lock, do the following:
1. Unlock and open the door from the outside.
2. Move the lever all the way to the unlock symbol.
3. Do the same for the other rear door.
The rear door locks will now work normally.
Lockout Protection
The power door locks will not work if the key is in the
ignition and a door is open. You can override this feature
by holding the driver’s side power door lock switch for
more than three seconds.
Leaving Your Vehicle
If you are leaving the vehicle, take your keys, open your
door and set the locks from the inside. Then get out and
close the door. Or, press the lock button on the remote
keyless entry transmitter after shutting the doors.
If your vehicle has a theft-deterrent system, seeContent
Theft-Deterrent on page 2-18.
2-13

Trunk Security Override
The remote keyless entry transmitter will unlock the
trunk even if the trunk release lockout switch is in LOCK.
Emergency Trunk Release Handle
Notice:Using the emergency trunk release handle
as a tie-down or anchor point when securing
items in the trunk may damage it. Use the
emergency trunk release handle only to help you
open the trunk lid.
There is a glow-in-the-dark emergency trunk release
handle located near the trunk latch. This handle will glow
following exposure to light. Pull the release handle up
to open the trunk from the inside.
2-15

Theft-Deterrent Systems
Vehicle theft is big business, especially in some cities.
Although your vehicle has a number of theft-deterrent
features, we know that nothing we put on it can make it
impossible to steal.
Content Theft-Deterrent
Your vehicle may have a
content theft-deterrent
alarm system. With
this system, the
SECURITY light will ash
as you open the door
if your ignition is off.
This light reminds you to activate the content
theft-deterrent system when leaving your vehicle.
To activate the system, do the following:
1. Open the door.
2. Lock the door with the power door lock switch or
with the remote keyless entry transmitter. The
SECURITY light should come on and stay on.
3. Close all doors. The SECURITY light should go off
after about 30 seconds. The alarm is not armed
until the SECURITY light goes off.If a door is opened without the key or remote
keyless entry transmitter, the alarm will go off. Your
vehicle’s lamps will ash and the horn will sound
for 30 seconds. The lamps and horn will then turn off to
save battery power.
Remember, the content theft-deterrent system will not
activate if you lock the doors with a key or use the
manual door lock. It activates only if you use a power
door lock switch with a door open, or with the remote
keyless entry transmitter. You should also remember
that you can start your vehicle with the correct ignition
key if the alarm has been set off.
Here is how to avoid setting off the alarm by accident:
If you do not want to activate the theft-deterrent
system, the vehicle should be locked with the
door keyafterthe doors are closed.
Always unlock a door with a key, or use the remote
keyless entry transmitter. Unlocking a door any
other way will set off the alarm.
If you set off the alarm by accident, unlock the driver’s
door with your key. You can also turn off the alarm
by pressing the unlock button on the remote keyless
entry transmitter. The alarm will not stop if you try
to unlock a door any other way.
2-18

Testing the Alarm
The alarm can be tested by following these steps:
1. From inside the vehicle, roll down the driver’s
window and open the driver’s door.
2. Activate the system by locking the doors with the
power door lock switch while the door is open, or
with the remote keyless entry transmitter.
3. Get out of the car, close the door and wait for the
SECURITY light to go out.
4. Then reach in through the window, unlock the door
with the manual door lock and open the door. This
should set off the alarm.
If the alarm does not sound when it should, but the
vehicle’s lamps ash, check to see if the horn works.
The horn fuse may be blown. To replace the fuse,
seeFuses and Circuit Breakers on page 5-92.
If the alarm does not sound or the vehicle’s lamps do
not ash, the vehicle should be serviced by an
authorized service center.
PASS-Key®III
Your PASS-Key®III system operates on a radio
frequency subject to Federal Communications
Commission (FCC) Rules and with Industry Canada.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1. this device may not cause harmful interference, and
2. this device must accept any interference received,
including interference that may cause undesired
operation.
This device complies with RSS-210 of Industry Canada.
Operation is subject to the following two conditions:
1. this device may not cause interference, and
2. this device must accept any interference received,
including interference that may cause undesired
operation of the device.
Changes or modications to this system by other than
an authorized service facility could void authorization to
use this equipment.
PASS-Key
®III uses a radio frequency transponder in
the key that matches a decoder in your vehicle.
2-19

PASS-Key®III Operation
Your vehicle is equipped
with the PASS-Key®III
(Personalized Automotive
Security System)
theft-deterrent system.
PASS-Key
®III is a passive
theft-deterrent system.
This means you don’t have
to do anything different
to arm or disarm the
system. It works when you
insert or remove the key
from the ignition.
When the PASS-Key
®III system senses that someone
is using the wrong key, it shuts down the vehicle’s
starter and fuel systems. The starter will not work and
fuel will stop being delivered to the engine. Anyone
using a trial-and-error method to start the vehicle will be
discouraged because of the high number of electrical
key codes.
When trying to start the vehicle, if the engine does not
start and the SECURITY light comes on, the key
may have a damaged transponder. Turn the ignition off
and try again.If the engine still does not start, and the key appears to
be undamaged, try another ignition key. At this time,
you may also want to check the fuse. SeeFuses
and Circuit Breakers on page 5-92. If the engine still
does not start with the other key, your vehicle needs
service. If your vehicle does start, the rst key may be
faulty. See your dealer who can service the
PASS-Key
®III to have a new key made.
It is possible for the PASS-Key
®III decoder to learn the
transponder value of a new or replacement key. Up
to 10 additional keys may be programmed for the
vehicle. This procedure is for programming additional
keys only.
Canadian Owners:If you lose or damage your keys,
only a GM dealer can service PASS-Key
®III to
have new keys made. To program additional keys you
will need two current driver’s keys. You must add a step
to the following procedure. After Step 2, repeat
Steps 1 and 2 with the second current driver’s key. Then
continue with Step 3.
To program the new key, do the following:
1. Verify that the new key has PK3 stamped on it.
2. Insert the current driver’s key in the ignition
and start the engine. If the engine will not start, see
your dealer for service.
3. After the engine has started, turn the key to OFF,
and remove the key.
2-20