2002 HONDA CIVIC sensor

Your Supplemental Restraint System
(SRS) includes:Two f ront airbags. The driver’s
airbag is stored in the center of
the steering wheel; the f ront
passenger’sairbagisstoredinthe
dashboard. Both are marked ‘‘SRS
AIRBAG.’’
If you ever have a moderate to
severe f rontal collision, the sensors
will detect the vehicle’s rapid
deceleration. If the rate of
deceleration is high enough, the
control unit will instantly inf late the
f ront airbags.
A sophisticated electronic system
that continually monitors and
records inf ormation about the
sensors, the control unit, the
airbag activators, and driver and
passenger seat belt use when the
ignition is ON (II).
Sensors that can detect a
moderate to severe frontal
collision.
Automatic seat belt tensioners
(see page ).
An indicator light on the
instrument panel that alerts you to
a possible problem with the
system (see page ).
Emergency backup power in case
your car’s electrical system is
disconnected in a crash.51
46
SRS Components
How Your Front A irbags Work
Additional Inf ormation About Your Airbags
Driver and Passenger Saf ety48

This can occur when the severity of
a collision is at the margin, or
threshold, that determines whether
or not the airbags will deploy. In
such cases, the seat belt will provide
suf f icient protection, and the
supplemental protection of f ered by
the airbag would be minimal.
Since both airbags use the same
sensors, both airbags normally
inf late at the same time. However, it
is possible f or only one airbag to
inf late.
Af ter inf lating, the f ront airbags
immediately def late, so they won’t
interf ere with the driver’s visibility,
or the ability to steer or operate
other controls.
During a f rontal crash, your seat
belts help restrain your lower body
and torso. Your airbag provides a
cushion to help restrain and protect
your head and chest.
The total time for inflation and
def lation is approximately one-tenth
of a second, so f ast that most
occupants are not aware that the
airbags deployed until they see them
lying in their laps.
After a crash, you may see what
looks like smoke. This is actually
powder f rom the airbag’s surf ace.
Although the powder is not harmf ul,
people with respiratory problems
mayexperiencesometemporary
discomf ort. If this occurs, get out of
the car as soon as it is safe to do so.
CONT INUED
Additional Inf ormation About Your Airbags
Driver and Passenger Saf ety49

To get the best protection f rom the
side airbags, front seat occupants
should wear their seat belts and sit
upright and well back in their seats.
If you ever have a moderate to
severe side impact, the sensors will
detect rapid deceleration and signal
the control unit to instantly inf late
either the driver’s or the passenger’s
side airbag.
Only one airbag will deploy during a
side impact. If the impact is on the
passenger’s side, the passenger’s
side airbag will deploy even if there
is no passenger.
Your car is equipped with side
airbags f or the driver and a f ront
seat passenger. The airbags are
stored in the outer edges of the f ront
seat-backs, and both are marked
‘‘SIDE AIRBAG.’’
U.S. Owners:
For additional information on how
your airbags work, see the booklet
titled
that came with your
owner’s manual.
Canadian Owners:
For additional information on how
your airbags work, ask your dealer
f or a copy of the booklet titled
SRS: What You Need to Know
About Airbags
SRS:
What You Need to Know About Airbags
.
Only on U.S. models equipped with side airbags.
Additional Inf ormation About Your Airbags
Driver and Passenger Saf ety
How Your Side A irbags Work
50

Two f actors normally contribute to
causing corrosion in your car:Moisture trapped in body cavities.
Dirtandroadsaltthatcollectsin
hollows on the underside of the
car stays damp, promoting
corrosion in that area.
Removal of paint and protective
coatings f rom the exterior and
underside of the car. Many corrosion-preventive measures
are built into your Honda. You can
help keep your car f rom corroding
by perf orming some simple periodic
maintenance:
Repair chips and scratches in the
paint as soon as you discover them.
Inspect and clean out the drain
holes in the bottom of the doors
and body.
Check the f loor coverings f or
dampness. Carpeting and f loor
mats may remain damp f or a long
time, especially in winter. This
dampness can eventually cause
the f loor panels to corrode. Use a high-pressure spray to clean
the underside of your car. This is
especially important in areas that
useroadsaltinwinter.Itisalsoa
good idea in humid climates and
areas subject to salt air. Cars
equipped with ABS have a sensor
and wiring at each wheel. Be
caref ul not to damage them.
Have the corrosion-preventive
coatings on the underside of your
car inspected and repaired
periodically.
1. 2.
Corrosion Prot ect ion
Appearance Care263

If you are planning to take your
Honda outside the U.S. or Canada,
contact the tourist bureaus in the
areas you will be traveling in to f ind
out about the availability of unleaded
gasoline with the proper octane
rating.
If unleaded gasoline is not available,
be aware that using leaded gasoline
in your Honda will af f ect perf or-
mance and fuel mileage, and damage
its emissions controls. It will no
longer comply with U.S. and
Canadian emissions regulations, and
will be illegal to operate in North
America. To bring your car back into
compliance will require the replace-
ment of several components, such as
theoxygensensorsandthethree
way catalytic converter. These re-
placements are not covered under
warranty.
Driving in Foreign Countries
T echnical Inf ormation301

The emissions control systems are
covered by warranties separate f rom
the rest of your car. Read your
warranty manual f or more inf orma-
tion.
The emissions control systems are
designed and certif ied to work to-
gether in reducing emissions to
levels that comply with the Clean Air
Act. To make sure the emissions
remain low, you should use only new
Genuine Honda replacement parts or
their equivalent f or repairs. Using
lowerqualitypartsmayincreasethe
emissions f rom your car.
The exhaust emissions controls
include three or f our systems: PGM-
FI, Ignition Timing Control, Exhaust
Gas Recirculation (SOHC VTEC
engine only), and Three Way
Catalytic Converter. These three or
f our systems work together to
control the engine’s combustion and
minimize the amount of HC, CO, and
NOx that comes out the tailpipe. The
exhaust emissions control systems
are separate from the crankcase and
evaporative emissions control
systems.
The PGM-FI System uses sequential
multiport f uel injection.
It has three subsystems: Air Intake,
Engine Control, and Fuel Control.
The Engine Control Module (ECM)
or the Powertrain Control Module
(PCM) uses various sensors to
determine how much air is going
into the engine. It then controls how much f uel to inject under all operat-
ing conditions.
This system constantly adjusts the
ignition timing, reducing the amount
of HC, CO and NOx produced.
The Exhaust Gas Recirculation
(EGR) system takes some of the
exhaust gas and routes it back into
the intake manif old. Adding exhaust
gas to the air/f uel mixture reduces
the amount of NOx produced when
the f uel is burned.
The three way catalytic converter is
in the exhaust system. Through
chemical reactions, it converts HC,
CO, and NOx in the engine’s exhaust
to carbon dioxide (CO ), dinitrogen
(N ), and water vapor.
2
2
On EX model only
Replacement Parts
Exhaust Emissions Controls
Emissions Cont rols
T echnical Inf ormation
PGM-FI Syst em Ignit ion T iming Cont rol Syst em
Exhaust Gas Recirculat ion (EGR)Syst em
Three Way Catalytic Converter
303