1998 CHEVROLET BLAZER sensor

Downloaded from www.Manualslib.com manuals search engine How does an air bag restrain?
In moderate to severe frontal or near-frontal collisions,
even belted occupants can contact the steering wheel or
the instrument panel. Air bags supplement the protection
provided by safety belts. Air bags distribute the force of
the impact more
evenly over the occupant’s upper body,
stopping
the occupant more gradually. But air bags would
not help you in many types of collisions, including
rollovers, rear impacts and side impacts, primarily
because an occupant’s motion is not toward those air
bags. Air bags should never be regarded as anything more than
a supplement to safety belts, and then only in
moderate to severe frontal or near-frontal collisions.
What will you see after an air bag inflates?
After an air bag inflates, it quickly deflates, so quickly that
some people may not even realize the
air bag inflated.
Some components
of the air bag module -- the steering
wheel hub for the driver’s air bag, or the instrument panel
for the right front passenger’s bag
-- will be hot for a short
time. The parts of the bag that come into contact with you
may be warm, but not too hot to touch. There will be
some smoke and dust coming from vents
in the deflated
air bags. Air bag inflation doesn’t prevent the driver from
seeing or from being able to steer the vehicle, nor does
it
stop people from leaving the vehicle.
When an air bag inflates, there is dust in the air.
This dust could cause breathing problems for
people with a history
of asthma or other
breathing trouble.
To avoid this, everyone in the
vehicle should get out as soon as it is safe to do
so.
If you have breathing problems but can’t get out
of the vehicle after an air bag inflates, then get
fresh air by opening a window or door.
Air bags are designed to inflate only once. After they
inflate, you’ll need some new parts for your air bag
system. If you don’t get them, the air bag system
won’t be there to help protect you in another crash.
A new system will include air bag modules and
possibly other parts. The service manual for your
vehicle covers the need to replace other parts.
Your vehicle is equipped with a diagnostic module,
which records information about the air bag system.
The module records information about the readiness
of the system, when the sensors are activated and
driver’s safety belt usage at deployment.
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Downloaded from www.Manualslib.com manuals search engine 0 Let only qualified technicians work on your air bag
system. Improper service can mean that your air bag
system won’t work properly. See your dealer for service.
NOTICE:
If you damage the covering for the driver’s or the
right front passenger’s
air bag, the bag may not
work properly. You may have to replace the air
bag module in the steering wheel or both the air
bag module and the instrument panel for the
right front passenger’s air bag.
Do not open or
break the air bag coverings.
If your vehicle ever gets into a lot of water -- such as water up
to the carpeting or higher
-- or if water enters your vehicle
and
soaks the carpet, the air bag controller can be soaked and
ruined. If this ever happens, and then you
start your vehicle,
the damage could make the air bags inflate, even if there’s\
no crash. You would have to replace the air bags as well as the
sensors and related parts. If your vehicle is ever in a flood, or
if it’s exposed to water that soaks the carpet, you can avoid
needless repair costs by turning
off the vehicle immediately.
Don’t let anyone start the vehicle, even to tow
it, unless the
battery cables are first disconnected.
Servicing Your Air Bag-Equipped Vehicle
Air bags affect how your vehicle should be serviced.
There are parts
of the air bag system in several places
around your vehicle. You don’t want the system to
inflate while someone is working
on your vehicle. Your
dealer and the
GM Service Manual have information
about servicing your vehicle and the air bag system. To
purchase a service manual, see “Service and Owner
Publications’’
in the Index.
/A CAUTION:
For up to two minutes after the ignition key is
turned off and the battery is disconnected, an air
bag can still inflate during improper service. You
can be injured if you are close to an air bag when
it inflates. Avoid wires wrapped with yellow tape
or yellow connectors. They are probably part of
the air bag system. Be sure to follow proper
service procedures, and make sure the person
performing work for you is qualified to do
so.
The air bag system does not need regular maintenance.
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Downloaded from www.Manualslib.com manuals search engine Adding Equipment to Your Air
Bag-Equipped Vehicle
@’ If I add a push bumper bf ii bicycle rack to the
front of my vehicle,
will it keep the air bags
from working properly?
A: As long as the push bumper or bicycle rack is
attached to your vehicle so that the vehicle’s basic
structure isn’t changed, it’s not likely to keep the
air bags from working properly in a crash.
e.’’ Is there anything I might add to the front of the
vehicle that could keep the air bags from working properly?
A: Yes. If you add things that change your vehicle’s
frame, bumper system, front end sheet metal or
height, they may keep the air bag system
from
working properly. Also, the air bag system may not
work properly if
you relocate any of the air bag
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.
See “Customer Satisfaction Procedure” in the Index.)
Center Front Passenger Position
(4-Door Models)
Lap Belt
If your vehicle has a front bench seat, someone can sit in
the center position.

Downloaded from www.Manualslib.com manuals search engine Rotate the knob to the right to the master lamps symbol
to turn on all the lamps listed as well as the headlamps.
Rotate the knob all the
way to the left to turn off your
lamps and put the system in auto headlamp mode.
Automatic Headlamp System
When it is dark enough outside, your automatic
headlamp system will turn on your headlamps at the
normal brightness along with other lamps such as the
taillamps, sidemarker, parking lamps and the instrument
panel lights. The radio lights will also be dim.
Your vehicle is equipped with a light sensor on the top
of the instrument panel under the radio speaker grill so
be sure it is not covered, which will cause the system to
be on whenever the ignition is on.
The system may also turn on your headlamps when
driving through a parking garage, heavy overcast
weather, a tunnel or fueling your vehicle in a low-light
area. This is normal. There is
a delay in the transition between the daytime and
nighttime operation of the Daytime Running Lamps
(DRL) and the automatic headlamp systems so that driving
under bridges or bright overhead street lights does not
affect the system. The
DRL and automatic headlamp
system will
only be affected when the light sensor sees a
change in lighting lasting longer than the delay.
To idle your vehicle with the automatic headlamp
system off, set the parking brake while the ignition is
off. Then
start your vehicle. The automatic headlamp
system will stay off until you release the parking brake.
As with any vehicle, you should turn on the regular
headlamp system when you need it.
Lamps On Reminder
A reminder chime will sound when your headlamps or
parking lamps are manually turned on and your ignition
is in
OFF, LOCK or ACCESSORY. To turn the chime
off, turn the knob all the way to the left or turn the
instrument panel dimmer down to the fully dimmed
position. In the automatic mode, the headlamps turn off
once the ignition key is in
OFF.
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Downloaded from www.Manualslib.com manuals search engine Air Bag Readiness Light
There is an air bag readiness light on the instrument
panel, which shows the air bag symbol. The system
checks the air bag’s electrical system for malfunctions.
The light tells
you if there is an electrical problem. The
system check includes the air bag sensors, the air bag
module, the wiring and the diagnostic module. For more information on the air bag system, see “Air Bag” in
the Index.
This light will come
on
when you start your engine,
and it will flash for a few
seconds. Then the light
should go out. This means
the system is ready.
Charging System Indicator Light
If the air bag readiness light stays on after you start the
engine or comes on when
you are driving, your air bag
system may not work properly. Have your vehicle
serviced right away.
The air bag readiness light should flash for a few
seconds when
you turn the ignition key to RUN. If the
light doesn’t come on then, have it fixed
so it will be
ready to warn you if there is a problem. The
charging system light
will
come on briefly when
you turn on the ignition,
but the engine is not
running, as
a check to
show
you it is working.
It should go out once the engine is running.
If it stays
on, or comes on while
you are driving, you may have a
problem with the charging system. It could indicate that
you have problems with a generator drive belt, or
another electrical problem. Have it checked right away.
Driving while this light is
on could drain your battery.
If you must drive a short distance with the light on, be
certain to turn off all your accessories, such as the radio
and air conditioner.
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Downloaded from www.Manualslib.com manuals search engine Temperature Knob Mode Knob - Automatic Operation
The middle knob on the control panel lets you select the
desired air temperature in your vehicle. This knob will
allow
you to adjust the interior air temperature
independently
of the function knob setting. Move the
knob to the right toward
82 for warmer air. Move the
knob to the left toward 66 for cooler air.
Full Hot: If you turn the temperature knob past 82°F
(28”C), the system will go into the
“full hot” mode. The
system will remain at that maximum heating setting and
the fan will blow at the speed the fan knob is set to. If
the fan is in AUTO, it will run at
full speed.
Full Cold: If you turn the temperature knob past 66°F
(1 9”C), the system will go into the “full cold” mode.
The system will remain at that maximum cooling setting
and the fan will blow at the speed the fan knob is set to. \
If the fan is in AUTO, it will run at
full speed.
Choosing either maximum setting will
not cause the
system to heat or cool any faster. The right knob
on the control panel allows you to
choose the direction of air delivery. When the system is
set for automatic operation, sensors will control the air
delivery mode. Air will come primarily from the floor or
instrument panel outlets, with some air directed to the
windshield
to prevent fogging.
When the system is
in AUTO mode, the air conditioning
light
will turn on, and the recirculation and outside air
lights turn off. With the system in full auto control (both
the fan and mode knobs in AUTO), you still have the ability to override any function. However, continually
overriding the outside air or the A/C compressor will
limit the ability of the system
to cool the
vehicle quickly.
If
you push a button for a function which is not
available,
the light next to that button will flash three
times
to alert you that it’s not available.
To find your comfort zone, start with the
74°F (23°C)
setting and allow about 20 minutes for the system to
adjust the temperature
if necessary.
3-4

Downloaded from www.Manualslib.com manuals search engine With the automatic setting, the air conditioning
compressor automatically cycles when needed to cool
the air. In cold weather, when the system senses the need
for heat, the airflow will be directed out the floor
outlets.
As the interior temperature approaches a desired
setting, the blower speed will decrease. To maintain
interior comfort, the airflow will adjust between the
instrument panel air outlets and floor outlets. On bright
sunny days in cool weather, the airflow may come out of
the air conditioning and floor outlets (bi-level mode) to
maintain comfort and prevent stuffiness.
To avoid blowing cold air in cold weather, the system
will delay turning on the fan until warm air is available.
The length of delay depends on the outside air
temperature, engine coolant temperature or the time
since the engine was last started. As the coolant warms
up, the blower fan speed will gradually increase and air
will flow from the heater outlets, with some airflow to
the windshield to prevent fogging under most
normal conditions.
If your vehicle
is sitting out on a warm day and you
have the fan set
on AUTO, the air will first flow out of
the floor air outlets for a few seconds. That is normal.
This
is to expel hot air from the air outlets. As the air is
cooled, the airflow will move through the air
conditioning outlets. Be careful
not to put anything over the solar sensor
located around the center of the instrument panel.
This sensor is used by the automatic system to
regulate temperature.
Mode Knob - Manual Operation
The right knob on the control panel allows you to
choose the direction of air delivery.
You can choose to set the climate control system
operations yourself, or let the system work for
you
by placing the system in AUTO mode. See “Mode
Knob
- Automatic Operation” earlier in this section.
+.
fl PANEL: This setting directs most of the air
through the instrument panel outlets and a small amount
through the floor outlets.
+H BI-LEVEL: Air is delivered through the heater
floor outlets as well as the instrument panel outlets.
+’ HEATER: This setting directs most of the
warmed air through the heater floor outlets and some
air through the windshield defroster outlets.
+.
e
3-5

Downloaded from www.Manualslib.com manuals search engine Fuse/Circuit Breaker Usage
2
3
4
8
9
10
11
12 Cigarette
Lighter, Data
Link Connector
Cruise Control Module and Switch,
Body Control Module, Heated Seats
Gages, Body Control Module,
Instrument Panel Cluster
Interior Lights
Not Used
Power Outside Mirror, Power
Lock Relay
Courtesy Lamps, Battery Run-Down
Protection
HVAC Control Head (Manual)
Turn Signal Cluster, Engine Control Module
Parking Lamps, Power Window
Switch, Body Control Module,
Ashtray Lamp
FuseKircuit
Breaker Usage
13
14
15
16
17
18
19
20
21
22 23
24 Auxiliary Power
Power Locks Motor
4WD Switch, Engine Controls
(VCM, PCM, Transmission)
Supplemental Inflatable Restraint,
SDM Module
Front Wiper
Not Used
Radio Battery
Not Used HVAC (Manual), HVAC
I
(Automatic), HVAC Sensors
(Automatic)
Anti-Lock Brakes
Rear Wiper
Radio, Ignition
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