2004 HONDA CIVIC COUPE sensor

Your airbag system includes:Two SRS (Supplemental Restraint
System) 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.’’
one f or the driver and one f or a
f ront passenger. The airbags are
stored in the outer edges of the
seat-backs. Both are marked
‘‘SIDE AIRBAG’’ (see page ).
Automatic front seat belt
tensioners (see page ).
Sensors that can detect a
moderate to severe frontal impact
or side impact in models equipped
with side airbags. A sophisticated electronic system
that continually monitors and
records inf ormation about the
sensors, the control unit, the
airbag activators, and driver and
frontpassengerseatbeltusewhen
the ignition is in the ON (II)
position.
If you ever have a moderate to
severe f rontal collision, sensors will
detect the vehicle’s rapid
deceleration. If the rate of
deceleration is high enough, the
control unit will instantly inf late the
driver’s and f ront passenger’s f ront
airbags, at the time and with the
f orce needed.
Emergency backup power in case
your vehicle’s electrical system is
disconnected in a crash.
An indicator on the instrument
panel that alerts you to a possible
problem with your airbags (see
page ).
an indicator on the dashboard that
alerts you that the passenger’s
side airbag has been turned of f
(see page ).
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On models equipped with side airbags, On models equipped with side airbags,
Airbag System Components How Your Front Airbags Work
Additional Inf ormation About Your Airbags
Driver and Passenger Saf ety22
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(On models equipped)
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.
A f ront seat passenger should not
use a cushion or other object as a
backrest. It may prevent the cutof f
system f rom working properly.
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.
The passenger’s side airbag has a
cutof f system designed to turn of f
the passenger’s f ront airbag if a
child’s head is in the airbag’s
deployment path (see page ).
If the side airbag of f indicator comes
on, have the passenger sit upright.
Once the passenger is out of the
deployment path of the side airbag,
the system will turn the airbag back
on and the indicator will go out. 27
How Your Side A irbags Work
Additional Inf ormation About Your Airbags
Driver and Passenger Saf ety25
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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
Honda replacement parts or their
equivalent f or repairs. Using lower
qualitypartsmayincreasethe
emissions f rom your vehicle.
The emissions control systems are
covered by warranties separate f rom
the rest of your vehicle. Read your
warranty manual f or more inf orma-
tion.
The exhaust emissions controls
include f our systems: PGM-FI,
Ignition Timing Control, Exhaust
Gas Recirculation and Three Way
Catalytic Converter. These four
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 f rom 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 ), nitrogen
(N ), and water vapor.
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T echnical Inf ormation
Replacement Parts
Exhaust Emissions Controls
PGM-FI Syst em Ignit ion T iming Cont rol Syst em
Exhaust Gas Recirculat ion (EGR)Syst em
Three Way Catalytic Converter
Emissions Cont rols
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