2005 BUICK LESABRE Ect sensor

When Should an Airbag Inate?
The driver’s and right front passenger’s frontal airbags
are designed to inate in moderate to severe frontal
or near-frontal crashes. But they are designed to inate
only if the impact exceeds a predetermined deployment
threshold. Deployment thresholds take into account
a variety of desired deployment and non-deployment
events and are used to predict how severe a crash
is likely to be in time for the airbags to inate and help
restrain the occupants. Whether your frontal airbags
will or should deploy is not based on how fast your
vehicle is traveling. It depends largely on what you hit,
the direction of the impact and how quickly your
vehicle slows down.
In addition, your vehicle has “dual stage” frontal airbags,
which adjust the restraint according to crash severity.
Your vehicle is equipped with electronic frontal sensors,
which help the sensing system distinguish between a
moderate frontal impact and a more severe frontal
impact. For moderate frontal impacts, these airbags
inate at a level less than full deployment. For
more severe frontal impacts, full deployment occurs. If
the front of your vehicle goes straight into a wall
that does not move or deform, the threshold level forthe reduced deployment is about 10 to 16 mph
(18 to 26 km/h), and the threshold level for a full
deployment is about 18 to 24 mph (29 to 38.5 km/h).
(The threshold level can vary, however, with specic
vehicle design, so that it can be somewhat above
or below this range.)
Airbags may inate at different crash speeds.
For example:
If the vehicle hits a stationary object, the airbag
could inate at a different crash speed than if
the object were moving.
If the object deforms, the airbag could inate at
a different crash speed than if the object does
not deform.
If the vehicle hits a narrow object (like a pole) the
airbag could inate at a different crash speed
than if the vehicle hits a wide object (like a wall).
If the vehicle goes into an object at an angle the
airbag could inate at a different crash speed
than if the vehicle goes straight into the object.
The frontal airbags (driver and right front passenger) are
not intended to inate during vehicle rollovers, rear
impacts, or in many side impacts because ination
would not likely help the occupants.
1-52

The Rainsense™ system is activated by turning the
wiper control band to one of the ve sensitivity levels
within the delay area. The delay position closest to OFF
is the lowest sensitivity setting, level one. The highest
sensitivity setting, level ve, is closest to LO. A
single wipe will occur each time you turn the wiper
control band to a higher sensitivity level to indicate that
the sensitivity level has been increased.
Notice:Going through an automatic car wash with
the wipers on can damage them. Turn the wipers
off when going through an automatic car wash.
The MIST and wash cycles operate as normal and are
not affected by the Rainsense™ function. The system
can be overridden at any time by manually changing the
wiper control to LO or HI speed.
Notice:Do not place stickers or other items on the
exterior glass surface directly in front of the rain
sensor. Doing this could cause the rain sensor
to malfunction.Windshield Washer
At the top of the turn signal/multifunction lever, there is
a paddle with the word PUSH on it. To spray washer
uid on the windshield, push the paddle. The wipers will
clear the window and either stop or return to your
preset speed. For more washer cycles, push and hold
the paddle.
{CAUTION:
In freezing weather, do not use your washer
until the windshield is warmed. Otherwise the
washer uid can form ice on the windshield,
blocking your vision.
Ice build up can block washer nozzles. Remove ice for
proper operation.
SeeWindshield Washer Fluid on page 5-34for
more information.
3-10

Light Sensor
Your Twilight
Sentinel®and DRL work
with the light sensor
located on top of the
instrument panel.
Do not cover it up. If you do, it will sense darkness and
the Twilight Sentinel
®lighting will turn on.
Exterior Lighting Battery Saver
If the exterior lamp button has been left on, the exterior
lamps will turn off about 10 minutes after the ignition
is turned to LOCK and a door has been opened.
This protects against draining the battery in case you
have accidentally left the headlamps or parking
lamps on. If you need to leave the lamps on for more
than 10 minutes, use the manual control to turn the
lamps back on after the ignition is turned to LOCK and
any door is opened. To delay the lamps from turning
off, seeTwilight Sentinel
®on page 3-16.
Instrument Panel Brightness
The lever for this feature is
located to the left of the
steering column.
The brightness of the instrument panel lights can be
adjusted by sliding the INTERIOR lever from LO to HI.
The instrument panel lights will be on only while the
parking lamps are on. The interior courtesy lamps can
be turned on by sliding the INTERIOR lever all the
way to HI.
Courtesy Lamps
If it is dark enough outside, when any door is opened,
several lamps go on. They make it easy for you to enter
and leave the vehicle. You can also turn these lamps
on by sliding the INTERIOR lever all the way to HI.
3-17

Sensors
The solar sensor on your vehicle monitors the solar
radiation and the air inside of your vehicle. This
information is then used to maintain the selected
temperature by initiating needed adjustments to the
temperature, the fan speed, and the air delivery system.
The system may also supply cooler air to the side of the
vehicle facing the sun. The recirculation mode will also be
activated, as necessary. Do not cover the solar sensor
located in the center of the instrument panel, near the
windshield, or the system will not work properly.
Defogging and Defrosting
Fog on the inside of windows is a result of high humidity
(moisture) condensing on the cool window glass. This
can be minimized if the climate control system is
used properly. This mode allows you to clear fog or
frost from your windshield.
1FRONT (Defrost):Pressing this button directs
most of the air to the windshield and the outboard outlets
(for the side windows), with some air directed to the
oor outlets. In this mode, the system will automatically
turn off recirculation and run the air conditioning
compressor, unless the outside temperature is at or
below freezing. Recirculation cannot be selected while
in FRONT defrost mode. Do not drive the vehicle until all
the windows are clear.
Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog or frost from the rear window.
=REAR (Rear Window Defogger):Press this
button to turn the rear window defogger on or off. Be
sure to clear as much snow from the rear window
as possible.
At speeds above 35 mph (55 km/h), the defogger will
operate continuously until you press the REAR
button again. After 10 minutes of driving below 35 mph
(55 km/h), the defogger will turn off automatically. If
you need additional warming time, push the button
again. The system will then operate for ve minutes
before going off by itself.
If your vehicle has heated outside rearview mirrors, the
mirrors will heat to help clear fog or frost from the
surface of the mirror when the rear window defogger
button is pressed.
Notice:Using a razor blade or sharp object to clear
the inside rear window may damage the rear
window defogger. Repairs would not be covered by
your warranty. Do not clear the inside of the rear
window with sharp objects.
3-26

Dual Automatic Climate
Control System
With this system you can control the heating, cooling
and ventilation for your vehicle.
Automatic Operation
AUTO (Automatic):Press the AUTO button for
automatic control of the inside temperature, the air
delivery mode and the fan speed.
1. Press the AUTO button.2. Adjust the temperature to 75°F (24°C).
Choosing the coldest or warmest temperature
setting will not cause the system to heat or cool any
faster. If you set the system at the warmest
temperature setting, the system will remain in
manual mode at that temperature and it will not go
into automatic mode.
In cold weather, the system will start at reduced fan
speeds to avoid blowing cold air into your vehicle
until warmer air is available. The system will
start out blowing air at the oor but may change
modes automatically as the vehicle warms up
to maintain the chosen temperature setting. The
length of time needed for warm up will depend on
the outside temperature and the length of time
that has elapsed since your vehicle was last driven.
3. Wait for the system to regulate. This may take
from 10 to 30 minutes. Then adjust the temperature,
if necessary.
Do not cover the solar sensor located in the center of
the instrument panel, near the windshield. For more
information on the solar sensor, see “Sensors” later in
this section.
3-27

RECIRC (Recirculation):Press this button to limit the
amount of outside air coming into the vehicle. It can
be used to prevent outside air and odors from entering
your vehicle or to help heat or cool the air inside
your vehicle more quickly. Press this button to turn the
recirculation mode on or off. When the button is
pressed, an indicator light will come on. The recirculation
mode cannot be used with the FRONT defrost or
VENT modes.
On hot days, open the windows to let hot air escape;
then close them. This helps to reduce the time it takes
for your vehicle to cool down. It also helps the system
to operate more efficiently.
For quick cool down on hot days, press the AUTO
button and the system will automatically enter
recirculation mode and the temperature will be at the full
cold position for maximum cooling.
Using these settings together for long periods of time
may cause the air inside of your vehicle to become too
dry. To prevent this from happening, after the air in
your vehicle has cooled, turn the recirculation mode off.
The air conditioning system removes moisture from
the air, so you may sometimes notice a small amount of
water dripping underneath your vehicle while idling or
after turning off the engine. This is normal.Sensors
The solar sensor on your vehicle monitors the solar
radiation and the air inside of your vehicle, then uses the
information to maintain the selected temperature by
initiating needed adjustments to the temperature, the fan
speed and the air delivery system. The system may also
supply cooler air to the side of the vehicle facing the sun.
The recirculation mode will also be activated, as
necessary. Do not cover the solar sensor located in the
center of the instrument panel, near the windshield, or the
system will not work properly.
Defogging and Defrosting
Fog on the inside of windows is a result of high humidity
(moisture) condensing on the cool window glass. This
can be minimized if the climate control system is
used properly.
1FRONT (Defrost):Press the FRONT button to
defrost the windshield by directing airow toward the
windshield and outboard outlets for the side windows. To
turn off FRONT, press the AUTO or AIR FLOW buttons.
If the AIR FLOW up button is pressed while in the FRONT
defrost mode, the system will direct the air toward the
instrument panel outlets. If the AIR FLOW down button is
pressed while in the FRONT defrost mode, the system
will direct the air toward the oor, and the FRONT defrost
mode will cancel. Do not drive the vehicle until all the
windows are clear.
3-29

Airbag Readiness Light
There is an airbag readiness light on the instrument
panel, which shows airbag. The system checks
the airbag’s electrical system for malfunctions. The light
tells you if there is an electrical problem. The system
check includes the airbag sensors, the airbag modules,
the wiring and the crash sensing and diagnostic
module. For more information on the airbag system, see
Airbag System on page 1-47.
This light will come on
when you start your
vehicle, and it will ash for
a few seconds. Then
the light should go out.
This means the system
is ready.
If the airbag readiness light stays on after you start the
vehicle or comes on when you are driving, your
airbag system may not work properly. Have your vehicle
serviced right away.{CAUTION:
If the airbag readiness light stays on after you
start your vehicle, it means the airbag system
may not be working properly. The airbags in
your vehicle may not inate in a crash, or they
could even inate without a crash. To help
avoid injury to yourself or others, have your
vehicle serviced right away if the airbag
readiness light stays on after you start
your vehicle.
The airbag readiness light should ash for a few
seconds when you turn the ignition to RUN. If the light
does not come on then, have it xed so it will be
ready to warn you if there is a problem.
3-37

Fuses Usage
14 Cruise Control
15 Direct Ignition System
16 Injector Bank #2
17 Not Used
18 Not Used
19 Powertrain Control Module Ignition
20 Oxygen Sensor
21 Injector Bank #1
22 Auxiliary Power
23 Cigarette Lighter
24 Fog Lamps/Daytime Running Lamps
25 Horn
26 Air Conditioner Clutch
Relays Usage
27 High-Beam Headlamp
28 Low-Beam Headlamp
29 Fog Lamps
30 Daytime Running Lamps
31 Horn
32 Air Conditioner Clutch
33 HVAC Solenoid
34 Accessory
Relays Usage
35 Not Used
36 Starter 1
37 Cooling Fan 1
38 Ignition 1
39 Cooling Fan Series/Parallel
40 Cooling Fan 2
Circuit
Breakers Usage
41 Starter
Fuses Usage
42 Not Used
43 Empty
44 ABS
45 Not Used
46 Cooling Fan 1
47 Cooling Fan 2
48 Spare
49 Spare
50 Spare
51 Spare
52 Spare
53 Fuse Puller
5-90