change key battery BUICK CENTURY 1998 Owner's Manual

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Mode 5: Headlamps, parking lamps and cornering
lamps (if equipped) flash and horn chirps when locking;
exterior lamps flash when unlocking vehicle.
Vehicles are delivered programmed in Mode 5. To
change to another mode:
1. Turn the ignition key to OFF.
2. Press and hold LOCK on the driver's power door
lock switch throughout the procedure.
3. Press the trunk button on the transmitter to enter the
programming mode. The transmitter will remain in
its current mode.
4. Press the trunk button again. Each time the trunk
button is pressed, the horn will chirp and the
transmitter will advance to the next mode.
5. Release the power door lock switch.
This procedure changes the mode for only the
transmitter used to change this setting. The procedure
will need to be repeated for the second transmitter.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 only four transmitters
matched to it.
See your dealer to match additional transmitters to
your vehicle.
Battery Replacement
Under normal use, the battery in your remote keyless
entry transmitter should last about two 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.

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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.
For battery replacement, use a Duracell
battery, type
DL
-2032, or a similar type.To replace the battery:
1. Insert a coin into the notch near the key ring.
Turn the coin to the left to separate the two halves of
the transmitter.
2. Once the transmitter is separated, use a pencil eraser
to remove the old battery. Do not use a metal object.
3. Remove and replace the battery. Insert the new
battery as the instructions under the cover indicate.
4. Snap the transmitter back together tightly to be sure
no moisture can enter.
5. Test the operation of the transmitter with your
vehicle. If the transmitter does not work,
resynchronize the transmitter.
Resynchronization
After you have changed the battery in your transmitter,
or if only the instant alarm button works, the transmitter
needs to be resynchronized to the receiver. Do this by
pressing and holding both the LOCK and UNLOCK
buttons on the transmitter for about eight seconds. You
must be within range of the vehicle.
Once the transmitter has been resynchronized, the horn
will chirp and the exterior lamps will flash once. The
system should now operate properly.

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NOTICE:
Holding your key in START for longer than
15 seconds at a time will cause your battery to be
drained much sooner. And the excessive heat can
damage your starter motor. Wait about
15 seconds between each try to help avoid
draining your battery or damaging your starter.
2. If it doesn't start right away, hold your key in
START for about three to five seconds at a time until
your engine starts. Wait about 15 seconds between
each try to help avoid draining your battery or
damaging your starter.
3. If your engine still won't start (or starts but then
stops), it could be flooded with too much gasoline.
Try pushing your accelerator pedal all the way to the
floor and holding it there as you hold the key in
START for about three seconds. If the vehicle starts
briefly but then stops again, do the same thing, but
this time keep the pedal down for five or six seconds.
This clears the extra gasoline from the engine. After
waiting about 15 seconds, repeat the normal
starting procedure.
NOTICE:
Your engine is designed to work with the
electronics in your vehicle. If you add electrical
parts or accessories, you could change the way
the engine operates. Before adding electrical
equipment, check with your dealer. If you don't,
your engine might not perform properly.
If you ever have to have your vehicle towed, see
the part of this manual that tells how to do it
without damaging your vehicle. See ªTowing
Your Vehicleº in the Index.