ect HONDA ODYSSEY 2004 RB1-RB2 / 3.G Owners Manual

Î
ÎThe burning of gasoline in your
vehicle’s engine produces several by-
products. Some of these are carbon
monoxide (CO), oxides of nitrogen
(NOx) and hydrocarbons (HC).
Gasoline evaporating f rom the tank
also produces hydrocarbons. Con-
trolling the production of NOx, CO,
and HC is important to the environ-
ment. Under certain conditions of
sunlight and climate, NOx and HC
react to f orm photochemical ‘‘smog.’’
Carbon monoxide does not contri-
bute to smog creation, but it is a
poisonous gas. The United States Clean Air Act
sets standards f or automobile
emissions. It also requires that
automobile manufacturers explain to
owners how their emissions controls
workandwhattodotomaintain
them. This section summarizes how
the emissions controls work.
Scheduled maintenance is on pages
and .
In Canada, Honda vehicles comply
with the Canadian emission
requirements, as specif ied in an
agreement with Environment
Canada, at the time they are
manuf actured.
Your vehicle has a Positive
Crankcase Ventilation System. This
keeps gasses that build up in the
engine’s crankcase f rom going into
the atmosphere. The Positive Crank- case Ventilation valve routes them
from the crankcase back to the
intake manif old. They are then
drawn into the engine and burned.
As gasoline evaporates in the f uel
tank, an evaporative emissions
control canister f illed with charcoal
adsorbs the vapor. It is stored in this
canister while the engine is of f . Af ter
the engine is started and warmed up,
the vapor is drawn into the engine
and burned during driving.
The Onboard Ref ueling Vapor
Recovery (ORVR) system captures
the f uel vapors during ref ueling. The
vapors are adsorbed in a canister
f illed with activated carbon. While
driving, the f uel vapors are drawn
into the engine and burned of f .
205
206
The Clean Air Act
Crankcase Emissions Control
System Evaporative Emissions Control
System
Onboard Ref ueling Vapor
Recovery
Emissions Cont rols
T echnical Inf ormation271

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 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
operating 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.
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 from
the rest of your vehicle. Read your
warranty manual f or more informa-
tion.
2
2
Exhaust Emissions Controls Replacement Parts
PGM-FI Syst emIgnit ion T iming Cont rol Syst em
Exhaust Gas Recirculat ion (EGR)Syst em
Three Way Catalytic Converter
T echnical Inf ormation
Emissions Cont rols
272

The three way catalytic converter
contains precious metals that serve
as catalysts, promoting chemical
reactions to convert the exhaust
gasses without af f ecting the metals.
The catalytic converter is ref erred to
as a three-way catalyst, since it acts
on HC, CO, and NOx. A replacement
unit must be an original Honda part
or its equivalent.
The three way catalytic converter
must operate at a high temperature
for the chemical reactions to take
place. It can set on f ire any com-
bustible materials that come near it.
Parkyourvehicleawayfromhigh
grass, dry leaves, or other f lamma-
bles.A defective three way catalytic
converter contributes to air pollution,
and can impair your engine’s per-
f ormance. Follow these guidelines to
protect your vehicle’s three way
catalytic converter.
Always use unleaded gasoline.
Even a small amount of leaded
gasoline can contaminate the
catalyst metals, making the three
way catalytic converter inef f ective. Keep the engine tuned-up.
Have your vehicle diagnosed and
repaired if it is misf iring, back-
f iring, stalling, or otherwise not
running properly.
Three Way Catalytic Converter
T echnical Inf ormation273
THREE WAY CATALYTIC CONVERTER

If you take your vehicle f or a state
emissions test shortly af ter the
battery has been disconnected or
gone dead, it may not pass the test.
This is because of certain ‘‘readiness
codes’’ that must be set in the on-
board diagnostics f or the emissions
systems. These codes are erased
when the battery is disconnected,
and set again only after several days
of driving under a variety of
conditions.If the testing f acility determines that
the readiness codes are not set, you
will be requested to return at a later
date to complete the test. If you must
get the vehicle re-tested within the
next two or three days, you can
condition the vehicle for re-testing
by doing the f ollowing.
Make sure the gas tank is nearly,
but not completely, f ull (around
3/4).
Make sure the vehicle has been
parked with the engine of f f or 8
hours or more.
Make sure the ambient
temperature is between 20° and
95°F. Without touching the accelerator
pedal, start the engine and let it
idle f or 20 seconds.
Keep the vehicle in Park
(automatic transmission). Increase
the engine speed to 2,000 rpm and
hold it there until the temperature
gauge rises to at least 1/4 of the
scale (approximately 3 minutes).
T esting of Readiness Codes
St at e Emissions T est ing
T echnical Inf ormation274

Select a nearby lightly traveled
major highway where you can
maintain a speed of 50 to 60 mph
(80to97km/h)foratleast20
minutes. Drive on the highway in
D (A/T). Do not use the cruise
control. When traf f ic allows, drive
f or 90 seconds without moving the
accelerator pedal. (Vehicle speed
may vary slightly; this is okay.) If
you cannot do this f or a
continuous 90 seconds because of
traf f ic conditions, drive f or at least
30 seconds, then repeat it two
more times (for a total of 90
seconds).Then drive in city/suburban
traffic for at least 10 minutes.
When traf f ic conditions allow, let
the vehicle coast f or several
seconds without using the
accelerator pedal or the brake
pedal.
If the testing f acility determines the
readiness codes are still not set, see
your Honda dealer.
T echnical Inf ormation
St at e Emissions T est ing
275

Customer Service................................
Inf ormation .278
....................
Warranty Coverages .279
Reporting Saf ety Def ects ..........................
(U.S. Vehicles) .280
.....................
Authorized Manuals .281
Warranty and Customer Relations
Warrant y and Cust omer Relat ions277

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Your new Honda is covered by these
warranties:
covers your new vehicle, except f or
the battery, emissions control
systems, and accessories, against
def ects in materials and
workmanship.
these two
warranties cover your vehicle’s emis-
sions control systems. Time, mileage,
and coverage are conditional. Please
read the warranty manual for exact
inf ormation.
this warranty gives up
to 100 percent credit toward a
replacement battery. a seat
belt that f ails to f unction properly is
coveredfortheusefullifeof the
vehicle.
all exterior body panels are
covered f or rust-through f rom the
inside f or the specif ied time period
with no mileage limit.
Honda Accessories are covered
under this warranty. Time and
mileage limits depend on the type of
accessory and other f actors. Please
read your warranty manual f or
details.
covers all Honda
replacement parts against defects in
materials and workmanship. provides
coverageforaslongasthepur-
chaser of the muf f ler owns the
vehicle.
Restrictions and exclusions apply to
all these warranties. Please read the
2004 Honda Warranty Inf ormation
booklet that came with your vehicle
f or precise inf ormation on warranty
coverages. Your Honda’s original
tires are covered by their
manuf acturer. Tire warranty inf or-
mation is in a separate booklet.
Please ref er to the 2004 Warranty
Manual that came with your vehicle. provides prorated
coverage f or a replacement battery
purchased f rom a Honda dealer.
Warranty Coverages
Warrant y and Cust omer Relat ions
U.S. Owners
Canadian Owners
New Vehicle L imit ed Warrant yEmissions Cont rol Syst ems Def ect sWarrant y and EmissionsPerf ormance Warranty
Original Equipment Bat t ery L imit edWarranty Seat Belt Limited Warranty
Rust Perf orat ion L imit ed Warrant y
Accessory Limited Warranty
Replacement Part s L imit edWarranty Replacement Muf f ler L if et ime
Limited Warranty
Replacement Bat t ery L imit ed
Warranty
279

If you believe that your vehicle has a
def ect which could cause a crash or
could cause injury or death, you
should immediately inf orm the
National Highway Traf f ic Saf ety
Administration (NHTSA) in addition
to notifying American Honda Motor
Co., Inc.If NHTSA receives similar com-
plaints, it may open an investigation,
and if it f inds that a saf ety def ect
exists in a group of vehicles, it may
order a recall and remedy campaign.
However, NHTSA cannot become
involved in individual problems
between you, your dealer, or
American Honda Motor Co., Inc.To contact NHTSA, you may either
call the Auto Saf ety Hotline toll-f ree
at 1-800-424-9393 (or 366-0123 in
Washington D.C. area) or write to:
NHTSA, U.S. Department of
Transportation, Washington,
D.C. 20590. You can also obtain
other inf ormation about motor
vehicle safety from the Hotline.
Reporting Saf ety Def ects (U.S. Vehicles)
Warrant y and Cust omer Relat ions280

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) This manual covers maintenance and recommended
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It is written f or the journeyman mechanic, but is simple
enough f or most mechanically-inclined owners to under-
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providing in-depth troubleshooting inf ormation f or each
electrical circuit in your vehicle.
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