sensor GMC ACADIA 2009 Owner's Manual

However, they are only designed to
inate if the impact exceeds a
predetermined deployment
threshold. Deployment thresholds
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 the 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.
Frontal airbags may inate at
different crash speeds. For example:
If the vehicle hits a stationary
object, the airbags could inate at
a different crash speed than if the
vehicle hits a moving object.
If the vehicle hits an object that
deforms, the airbags could inate
at a different crash speed than if
the vehicle hits an object that
does not deform.
If the vehicle hits a narrow object
(like a pole), the airbags 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 airbags could
inate at a different crash speed
than if the vehicle goes straight
into the object.
Thresholds can also vary with
specic vehicle design.
Frontal airbags are not intended to
inate during vehicle rollovers, rear
impacts, or in many side impacts.
In addition, the vehicle has
dual-stage frontal airbags.
Dual-stage airbags adjust the
restraint according to crash severity.
The vehicle has electronic frontal
sensors, which help the sensing
system distinguish between a
moderate frontal impact and a
more severe frontal impact.For moderate frontal impacts,
dual-stage airbags inate at a level
less than full deployment. For
more severe frontal impacts, full
deployment occurs.
The vehicle has seat-mounted side
impact and roof-rail airbags. See
Airbag System on page 1-48.
Seat-mounted side impact and
roof-rail airbags are intended to
inate in moderate to severe side
crashes. In addition, these roof-rail
airbags are intended to inate during
a rollover or in a severe frontal
impact. Seat-mounted side impact
and roof-rail airbags will inate if the
crash severity is above the system’s
designed threshold level. The
threshold level can vary with specic
vehicle design.
Seat-mounted side impact airbags
are not intended to inate in frontal
impacts, near-frontal impacts,
rollovers, or rear impacts.
1-52 Seats and Restraint System

In many crashes severe enough to
inate the airbag, windshields
are broken by vehicle deformation.
Additional windshield breakage
may also occur from the right front
passenger airbag.
Airbags are designed to inate
only once. After an airbag
inates, you will need some new
parts for the airbag system. If
you do not get them, the airbag
system will not be there to
help protect you in another crash.
A new system will include
airbag modules and possibly
other parts. The service manual
for your vehicle covers the
need to replace other parts.
The vehicle has a crash sensing
and diagnostic module which
records information after a crash.
SeeVehicle Data Recording
and Privacy on page 7-16
andEvent Data Recorders on
page 7-16.
Let only qualied technicians
work on the airbag systems.
Improper service can mean that
an airbag system will not
work properly. See your
dealer/retailer for service.
Passenger Sensing
System
The vehicle has a passenger
sensing system for the right front
passenger position. The passenger
airbag status indicator will be
visible on the instrument panel when
the vehicle is started.The words ON and OFF, or the
symbol for on and off, are visible
during the system check. If you are
using remote start, if equipped,
to start the vehicle from a distance,
you may not see the system
check. When the system check is
complete, either the word ON
or OFF, or the symbol for on or off,
will be visible. SeePassenger
Airbag Status Indicator on
page 3-36.
The passenger sensing system turns
off the right front passenger frontal
airbag under certain conditions. The
driver airbag, seat-mounted side
impact airbags and the roof-rail
airbags are not affected by the
passenger sensing system.
The passenger sensing system
works with sensors that are part of
the right front passenger seat. The
sensors are designed to detect the
presence of a properly-seated
occupant and determine if the right
front passenger frontal airbag should
be enabled (may inate) or not. United States
Canada
Seats and Restraint System 1-55

Adding Equipment to
Your Airbag-Equipped
Vehicle
Q:Is there anything I might add
to or change about the
vehicle that could keep the
airbags from working
properly?
A:Yes. If you add things that
change the vehicle’s frame,
bumper system, height, front end
or side sheet metal, they may
keep the airbag system from
working properly. Changing or
moving any parts of the front
seats, safety belts, the airbag
sensing and diagnostic module,
steering wheel, instrument panel,
roof-rail airbag modules, ceiling
headliner or pillar garnish trim,
front sensors, side impact
sensors, rollover sensor module,
or airbag wiring can affect the
operation of the airbag system.In addition, the vehicle has a
passenger sensing system for the
right front passenger position,
which includes sensors that are
part of the passenger seat. The
passenger sensing system may
not operate properly if the original
seat trim is replaced with non-GM
covers, upholstery or trim, or with
GM covers, upholstery or trim
designed for a different vehicle.
Any object, such as an
aftermarket seat heater or a
comfort enhancing pad or device,
installed under or on top of the
seat fabric, could also interfere
with the operation of the
passenger sensing system.
This could either prevent proper
deployment of the passenger
airbag(s) or prevent the
passenger sensing system from
properly turning off the passenger
airbag(s). SeePassenger
Sensing System on page 1-55.If you have questions, call
Customer Assistance. The phone
numbers and addresses for
Customer Assistance are in Step
Two of the Customer Satisfaction
Procedure in this manual. See
Customer Satisfaction Procedure
on page 7-1.
If the vehicle has rollover
roof-rail airbags, seeDifferent
Size Tires and Wheels on
page 5-50for additional
important information.
1-60 Seats and Restraint System

Q:Because I have a disability,
I have to get my vehicle
modied. How can I nd out
whether this will affect my
airbag system?
A:If you have questions, call
Customer Assistance. The phone
numbers and addresses for
Customer Assistance are in Step
Two of the Customer Satisfaction
Procedure in this manual. See
Customer Satisfaction Procedure
on page 7-1.
In addition, your dealer/retailer and
the service manual have information
about the location of the airbag
sensors, sensing and diagnostic
module and airbag wiring.
Restraint System
Check
Checking the Restraint
Systems
Safety Belts
Now and then, check the safety belt
reminder light, safety belts, buckles,
latch plates, retractors, and
anchorages are all working properly.
Look for any other loose or damaged
safety belt system parts that might
keep a safety belt system from doing
its job. See your dealer/retailer to
have it repaired. Torn or frayed
safety belts may not protect you in a
crash. They can rip apart under
impact forces. If a belt is torn or
frayed, get a new one right away.
Make sure the safety belt reminder
light is working. SeeSafety Belt
Reminders on page 3-35for more
information.Keep safety belts clean and dry.
SeeCare of Safety Belts on
page 5-84.
Airbags
The airbag system does not need
regularly scheduled maintenance or
replacement. Make sure the
airbag readiness light is working.
SeeAirbag Readiness Light
on page 3-36for more information.
Notice:If an airbag covering
is damaged, opened, or broken,
the airbag may not work properly.
Do not open or break the airbag
coverings. If there are any opened
or broken airbag covers, have
the airbag covering and/or airbag
module replaced. For the
location of the airbag modules,
seeWhat Makes an Airbag
Inflate? on page 1-53. See your
dealer/retailer for service.
Seats and Restraint System 1-61

warning message in the Driver
Information Center (DIC) will indicate
that the liftgate is open. After
removing the obstructions, manually
open the liftgate to the full open
position or close the liftgate to the
fully closed and latched position. The
liftgate will now resume normal
power operation.
Your vehicle has pinch sensors
located on the side edges of
the liftgate. If an object is caught
between the liftgate and the
body and presses against this
sensor, the liftgate will reverse
direction and open fully. The liftgate
will remain open until it is activated
again or closed manually. Do
not force the liftgate open or closed
during a power cycle.Manual Operation of Power
Liftgate
To change the liftgate to manual
operation, press the switch on
the center console to the OFF
position.
With the power liftgate disabled and
all of the doors unlocked, the liftgate
can be manually opened and closed.
To open the liftgate, press the
touchpad on the handle on the
outside of the liftgate, and lift the
gate open. To close the liftgate, use
the pull cup to lower the liftgate andclose. The liftgate latch will power
close. Always close the liftgate
before driving.
If the RKE button or the power close
button on the liftgate is pressed while
power operation is disabled, the
lights will ash three times, but the
liftgate will not move.
It is not recommended that you drive
with the liftgate open, however, if you
must drive with the liftgate open, the
liftgate should be set to manual
operation by pressing the OFF
switch on the center console.
The liftgate has an electric latch. If
the battery is disconnected or
has low voltage, the liftgate will not
open. The liftgate will resume
operation when the battery is
reconnected and charged.
If the battery is properly connected
with adequate voltage, the switch
is not disabled, and the liftgate
still will not function, your vehicle
should be taken to a dealer/retailer
for service.
Features and Controls 2-13

This feature can be turned on or off
through the Driver Information
Center (DIC). SeeDIC Vehicle
Customization (With DIC Buttons)
on page 3-64andMemory Seat and
Mirrors on page 1-6for more
information.
Outside Convex Mirror
{CAUTION
A convex mirror can make things
(like other vehicles) look farther
away than they really are. If you
cut too sharply into the right lane,
you could hit a vehicle on the
right. Check the inside mirror or
glance over your shoulder before
changing lanes.
The passenger side mirror is convex
shaped. A convex mirror’s surface
is curved so more can be seen from
the driver seat.
Outside Heated Mirrors
For vehicles with heated mirrors:
<(Rear Window Defogger):
Press to heat the mirrors.
See “Rear Window Defogger” under
Dual Automatic Climate Control
System on page 3-25for more
information.
Object Detection
Systems
Ultrasonic Rear Parking
Assist (URPA)
For vehicles with the Ultrasonic Rear
Parking Assist (URPA) system, it
operates at speeds less than 5 mph
(8 km/h), and assists the driver with
parking and avoiding objects while in
R (Reverse). The sensors on the rear
bumper are used to detect the
distance to an object up to 8 feet
(2.5 m) behind the vehicle, and at
least 10 inches (25.4 cm) off the
ground.
2-34 Features and Controls

The following describes how the URPA display lights appear as the vehicle
gets closer to a detected object:
DescriptionEnglishMetric
amber light 8 ft2.5 m
amber/amber lights 40 in1.0 m
amber/amber/red lights 23 in0.6 m
amber/amber/red lights ashing 1 ft 0.3 m
The system can be disabled through
the Driver Information Center
(DIC). See “Park Assist” under DIC
Operation and Displays (With
DIC Buttons) on page 3-46 orDIC
Operation and Displays (Without
DIC Buttons) on page 3-51 for more
information.
When the System Does Not
Seem to Work Properly
If the URPA system will not activate
due to a temporary condition, the
message PARK ASSIST OFF will be
displayed on the DIC and a red
light will be shown on the rear URPA display when the shift lever is
moved into R (Reverse). This may
occur under the following
conditions:
The driver disables the system.
The parking brake pedal is
depressed.
The ultrasonic sensors are not
clean. Keep the vehicle’s rear
bumper free of mud, dirt,
snow, ice and slush. For cleaning
instructions, see
Washing Your
Vehicle on page 5-84 .
A trailer was attached to the
vehicle, or a bicycle or an
object was hanging out of the
liftgate during the last drive cycle,
the red light may illuminate in
the rear display. Once the
attached object is removed,
URPA will return to normal
operation.
A tow bar is attached to the
vehicle.
The vehicle’s bumper is
damaged. Take the vehicle to
your dealer/retailer to repair
the system.
Other conditions may affect
system performance, such
as vibrations from a jackhammer
or the compression of air
brakes on a very large truck.
If the system is still disabled, after
driving forward at least 15 mph
(25 km/h), take the vehicle to your
dealer/retailer.
2-36 Features and Controls

Daytime Running
Lamps (DRL)/Automatic
Headlamp System
Daytime Running Lamps (DRL) can
make it easier for others to see
the front of your vehicle during the
day. Fully functional daytime
running lamps are required on all
vehicles rst sold in Canada.
The DRL system makes either the
low-beam headlamps come on at a
reduced brightness or the DRL lights,
for vehicles with High Intensity
Discharge (HID) headlamps when
the following conditions are met:
The ignition is in the ON/RUN
position.
The exterior lamps control is
in AUTO.
The engine is running.When the DRL are on, the regular
headlamps, taillamps, sidemarker,
and other lamps will not be on.
The instrument panel and cluster will
also not be lit.
For vehicles with HID headlamps, if
the DRL are on and the left or
right turn signal lamp is turned on,
the left or right DRL will go off.
The headlamps automatically
change from DRL to the regular
headlamps depending on the
darkness of the surroundings.
The other lamps that come on with
the headlamps will also come on.
When it is bright enough outside,
the headlamps will go off and
the DRL will come on.
The regular headlamp system
should be turned on when needed.
Do not cover the light sensor on
top of the instrument panel because
it works with the DRL.
Fog Lamps
Use the fog lamps for better vision
in foggy or misty conditions.
The fog lamps button is located on
the exterior lamps control to the
left of the steering column.
#(Fog Lamps):Press the exterior
lamps button to turn the fog lamps
on or off. A light comes on in the
instrument panel cluster when the
fog lamps are in use. The ignition
must be on for the fog lamps
to work.
When the headlamps are changed
to high-beam, the fog lamps will
turn off. The fog lamps come back
on again when the high-beam
headlamps are turned off.
Some localities have laws that
require the headlamps to be
on along with the fog lamps.
Instrument Panel 3-13

Notice:Improper use of the
power outlet can cause damage
not covered by the warranty.
Do not hang any type of
accessory or accessory bracket
from the plug because the
power outlets are designed for
accessory power plugs only.
Power Outlet 115
Volt Alternating Current
For vehicles with this power outlet,
it can be used to plug in electrical
equipment that uses a maximum
limit of 150 watts.The power outlet is located on the
rear of the center console.
An indicator light on the outlet turns
on to show it is in use. The light
comes on when the ignition is
in ON/RUN and equipment requiring
less than 150 watts is plugged
into the outlet, and no system fault
is detected.
The indicator light does not come
on when the ignition is in LOCK/OFF
or if no equipment is plugged into
the outlet.
If equipment is connected using
more than 150 watts or a system
fault is detected, a protection circuit
shuts off the power supply and
the indicator light turns off. To reset
the circuit, unplug the item and
plug it back in or turn the Remote
Accessory Power (RAP) off and then
back on. SeeRetained Accessory
Power (RAP) on page 2-21.
The power restarts when equipment
using 150 watts or less is plugged
into the outlet and a system
fault is not detected.The power outlet is not designed for
the following electrical equipment
and may not work properly if
these items are plugged into the
power outlet:
Equipment with high initial
peak wattage such as:
compressor-driven refrigerators
and electric power tools.
Other equipment requiring
an extremely stable power
supply such as:
microcomputer-controlled
electric blankets, touch sensor
lamps, etc.
SeeHigh Voltage Devices and
Wiring on page 5-89.
Instrument Panel 3-21

For vehicles with heated outside
rearview mirrors, fog or frost
is cleared from the surface of the
mirror when the rear window
defog button is pressed.
Notice:Do not use a razor blade
or sharp object to clear the
inside rear window. Do not adhere
anything to the defogger grid
lines in the rear glass. These
actions may damage the rear
defogger. Repairs would not be
covered by your warranty.
REAR:Press to turn the rear
heating and air conditioning on or
off. SeeRear Air Conditioning
and Heating System on page 3-31
orRear Air Conditioning and
Heating System and Electronic
Climate Controls on page 3-32.Sensors
The solar sensor, located in the
defrost grille in the middle of
the instrument panel, monitors the
solar heat. Do not cover the
solar sensor or the system will not
work properly.The interior temperature sensor
located on the instrument panel to
the right of the steering column,
measures the temperature of the air
inside the vehicle.
There is also an exterior temperature
sensor located behind the front grille.
This sensor reads the outside air
temperature and helps maintain the
temperature inside the vehicle. Any
cover on the front of the vehicle
could cause a false reading in the
displayed temperature.
The climate control system uses the
information from these sensors to
maintain comfort settings by
Instrument Panel 3-29