sensor CHEVROLET HHR 2007 1.G Owners Manual

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 has an electronic
frontal sensor which helps 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 for the
reduced deployment is about 10 to 16 mph
(16 to 26 km/h), and the threshold level for a full
deployment is about 25 to 30 mph (40 to 49 km/h).
The threshold level can vary, however, with
specic vehicle design, so that it can be somewhat
above or below this range.
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Passenger Sensing System
Your vehicle has a passenger sensing system for
the right front passenger’s position. A passenger
airbag status indicator on the instrument panel will
be visible when you turn your ignition key to
START or RUN.
The words ON and OFF or the symbol for on and
off, will be visible during the system check. If
you are using remote start to start your vehicle
from a distance, you may not see the system
check. When the system check is complete, either
the word ON or the word OFF, or the symbol
for on or the symbol for off will be visible.
SeePassenger Airbag Status Indicator on
page 182.The passenger sensing system will turn off the
right front passenger’s frontal airbag under certain
conditions. The driver’s airbags are not part of
the passenger sensing system.
The passenger sensing system works with
sensors that are part of the right front passenger’s
seat and safety belt. The sensors are designed
to detect the presence of a properly-seated
occupant and determine if the passenger’s frontal
airbag should be enabled (may inate) or not.
Accident statistics show that children are safer if
they are restrained in the rear rather than the front
seat. We recommend that child restraints be
secured in a rear seat, including an infant riding in
a rear-facing infant seat, a child riding in a
forward-facing child seat and an older child riding
in a booster seat.
United StatesCanada
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Adding Equipment to Your
Airbag-Equipped Vehicle
Q:Is there anything I might add to the front
or sides of the vehicle that could keep the
airbags from working properly?
A:Yes. If you add things that change your
vehicle’s frame, bumper system, height,
front end or side sheet metal, they may keep
the airbag system from working properly.
Also, the airbag system may not work properly
if you relocate any of the airbag sensors. If
you have any questions about this, you should
contact Customer Assistance before you
modify your vehicle. The phone numbers and
addresses for Customer Assistance are in
Step Two of the Customer Satisfaction
Procedure in this manual. SeeCustomer
Satisfaction Procedure on page 412.
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:Changing or moving any parts of the
front seats, safety belts, the airbag sensing
and diagnostic module, steering wheel,
instrument panel, ceiling headliner, ceiling and
pillar garnish trim, roof-mounted airbag
modules, or airbag wiring can affect the
operation of the airbag system. 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.
SeeCustomer Satisfaction Procedure on
page 412.
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Wiper Activated Headlamps
This feature activates the headlamps and parking
lamps after the windshield wipers are turned
on. For this feature to work, automatic lighting
must be enabled. SeeHeadlamps on page 163for
additional information.
When the ignition is turned off, the wiper-activated
headlamps will immediately turn off. They will
also turn off 15 seconds after the windshield wiper
control is turned off.
Headlamps on Reminder
If you open the driver’s door with the ignition off
and the lamps on, you will hear a warning chime.
Daytime Running Lamps (DRL)
Daytime Running Lamps (DRL) can make it easier
for others to see the front of your vehicle during
the day. DRL can be helpful in many different
driving conditions, but they can be especially
helpful in the short periods after dawn and before
sunset. Fully functional daytime running lamps
are required on all vehicles rst sold in Canada.Your vehicle has a light sensor on top of the
instrument panel. Make sure it is not covered or
the headlamps will come on when you do not
need them.
The DRL system will make the headlamps come
on at reduced brightness when the following
conditions are met:
The ignition is on.
The exterior lamp control is turned to AUTO.
The light sensor detects daytime light.
The shift lever is not in PARK (P).
While the DRL system is on, the taillamps,
sidemarker lamps, and instrument panel lights will
not be illuminated.
The DRL system will be off any time your vehicle
is in PARK (P). The DRL system on U.S.
vehicles can also be turned off by using the off/on
switch for one ignition cycle.
As with any vehicle, you should turn on the
regular headlamp system when you need it.
164

Automatic Headlamp System
When it is dark enough outside, your automatic
system will turn on your headlamps at the normal
brightness along with other lamps such as the
taillamps, sidemarker, parking lamps, instrument
panel lights, and interior switch backlighting.
Your vehicle has a light sensor on top of the
instrument panel. Make sure it is not covered, or
the headlamps may remain on when you do
not need them.
The system may also be on when driving through
a parking garage, heavy overcast weather or a
tunnel. This is normal.
There is a delay in the transition between the
daytime and nighttime operation of the automatic
lamp control system so that driving under
bridges or bright overhead street lights does not
affect the system. The automatic lamp control
system will only be affected when the light sensor
sees a change in lighting lasting longer than
this delay.If you start your vehicle in a dark garage, the
automatic lamp system will come on immediately.
Once you leave the garage, it will take about
20 seconds for the automatic lamp system
to change to DRL if it is light outside. During that
delay, the instrument panel cluster may not be
as bright as usual. Make sure the instrument panel
brightness control is in the full bright position.
SeeInstrument Panel Brightness on page 166.
To idle your vehicle with the system off, turn
the ignition on and turn the exterior light switch to
the off/on position. For Canadian vehicles, the
transaxle must stay in PARK (P) for this function
or the parking brake must be set for vehicles
with manual transaxles.
As with any vehicle, you should turn on the
regular headlamps when you need them.
165

Airbag Readiness Light
There is an airbag readiness light on the
instrument panel, which shows the airbag symbol.
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 sensor, the airbag modules,
the wiring and the crash sensing and diagnostic
module. For more information on the airbag
system, seeAirbag System on page 71.
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 key to RUN or
START. If the light does not come on then,
have it xed so it will be ready to warn you if there
is a problem.
181

Engine Air Cleaner/Filter
SeeEngine Compartment Overview on page 298
for the location of the engine air cleaner/lter.
When to Inspect the Engine
Air Cleaner/Filter
Inspect the air cleaner/lter at the MaintenanceII
intervals and replace it at the rst oil change after
each 50,000 mile (85 000 km) interval. See
Scheduled Maintenance on page 393for more
information. If you are driving in dusty/dirty
conditions, inspect the lter at each engine oil
change.
How to Inspect the Engine
Air Cleaner/Filter
To inspect the air cleaner/lter remove the lter
from the vehicle and lightly shake the lter to
release loose dust and dirt. If the lter remains
caked with dirt, a new lter is required. Never use
compressed air to clean the lter.
Because this operation can be a little difficult, you
may choose to have this done at the dealership
service department.
To inspect or replace the lter, do the following:
1. Disconnect the MAF sensor, PCV hose,
and both ducts.
2. Pull the entire system from the top of the
engine.
3. Flip the system over and place it on a soft,
non-abrasive surface.
4. Remove the screws that hod the housing and
cover together and lift off the housing.
5. Inspect or replace the engine air cleaner/lter.
6. Reverse the steps to reinstall the system.
Be sure to reinstall the housing tightly.
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