1998 HONDA ODYSSEY air condition

Emissions Controls

The 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 from 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 form photochemical "smog." Carbon monoxide does not contri-
bute to smog creation, but it is a
poisonous gas. The Clean Air Act
The United States Clean Air Act* sets standards for automobile
emissions. It also requires that
automobile manufacturers explain to
owners how their emissions controls
work and what to do to maintain them. This section summarizes how
the emissions controls work.Scheduled maintenance is on page
164.

* In Canada, Honda vehicles comply
with the Canadian Motor Vehicle Safety Standards (CMVSS) for
Emissions valid at the time they are

manufactured.
Crankcase Emissions Control

System

Your vehicle has a Positive Crankcase Ventilation System. This
keeps gasses that build up in the engine's crankcase from going into
the atmosphere. The Positive Crank- case Ventilation valve routes them
from the crankcase back to the intake manifold. They are thendrawn into the engine and burned.
Evaporative Emissions Control
System
As gasoline evaporates in the fuel tank, an evaporative emissionscontrol canister filled with charcoal
adsorbs the vapor. It is stored in this
canister while the engine is off. After
the engine is started and warmed up,
the vapor is drawn into the engine and burned during driving.

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Emissions Controls
Exhaust Emissions Controls

The exhaust emissions controls include four 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 from the crankcase and
evaporative emissions control
systems.

PGM-FI System

The PGM-FI System uses sequential multiport fuel 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 fuel to inject under all operat-
ing conditions. Ignition Timing Control System
This system constantly adjusts the ignition timing, reducing the amountof HC, CO and NOx produced.
Exhaust Gas Recirculation (EGR)
System

The Exhaust Gas Recirculation (EGR) system takes some of the
exhaust gas and routes it back into
the intake manifold. Adding exhaust
gas to the air/fuel mixture reduces
the amount of NOx produced when
the fuel is burned.
Three Way Catalytic Converter
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 (CO2), dinitrogen
(N2), and water vapor.
Replacement Parts

The emissions control systems are designed and certified 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 newGenuine Honda replacement parts or
their equivalent for repairs. Using
lower quality parts may increase the emissions from your vehicle.
The emissions control systems are covered by warranties separate from
the rest of your vehicle. Read your
warranty manual for more informa-
tion.

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Index

Accessories and Modifications.... 134 Accessories................................. 134
Additional Safety Precaution.... 135Modifications............................. 135
ACCESSORY (Ignition Key
Position)........................................ 70

Adding Automatic Transmission

Fluid........................................ 177

Brake Fluid................................. 183
Engine Coolant........................... 177

Engine Oil................................... 173

Power Steering Fluid................. 184
Windshield Washer Fluid......... 181
Additional Information About
Your Seat Belts........................ 41
Lap Belt......................................... 42
Lap/Shoulder Belt....................... 41
Seat Belt Maintenance................ 42
Seat Belt System Components... 41
Additional Information About
Your SRS.................................. 42
Additional Safety Precautions.... 46 How Your Airbags Work............ 44
How Your SRS Indicator

Works........................................ 46

SRS Components......................... 44

Additives, Engine Oil..................... 175

Adjustments
Mirrors.......................................... 84

Head Restraints........................... 76

Seats.............................................. 74

Steering Wheel............................ 62

Airbag (SRS) ...................................... 7

Air Cleaner Element...................... 185

Air Conditioning............................... 94
Maintenance............................... 194

Usage............................................. 94

Air Outlets (Vents).......................... 96
Air Pressure, Tires........................ 196
Alcohol in Gasoline........................ 128
Antifreeze....................................... 177
Anti-lock Brakes (ABS) Indicator Light..................... 53, 149Operation.................................... 148
Anti-theft Steering Column Lock.. 70
Appearance Care........................... 213
Ashtray.............................................. 89
Audio System................................. 103
Automatic Speed Control................ 64
Automatic Transmission............... 142

Capacity, Fluid........................... 248

Checking Fluid Level................ 182

Shifting........................................ 142

Shift Lever Positions................. 142

Shift Position Indicator............. 142

Shift Lock Release..................... 145

Battery
Charging System
Indicator............................ 52, 235

Jump Starting............................. 230
Maintenance............................... 189

Specifications............................. 249

Before Driving............................... 127

Belts, Seat........................................... 6

Beverage Holder.............................. 86
Body Repair.................................... 219

CONTINUEDProCarManuals.comMain Menu s t

Index

Brakes Anti-lock System (ABS)............ 148
Break-in, New Linings .............. 128

Fluid............................................ 183

Light, Burned-out...................... 196
Parking.......................................... 85
System Indicator.......................... 52
Wear Indicators......................... 147
Brakes, ABS Operation.................................... 148
System Indicator.................. 53, 149
Braking System.............................. 147
Break-in, New Car......................... 128
Brightness Control, Instruments... 59
Brights, Headlights......................... 58
Bulb Replacement Back-up Lights........................... 208
Brake Lights............................... 208
Ceiling Light............................... 210
Front Parking Lights................. 207
Front Side Marker Lights......... 207
Headlights.................................. 206
License Plate Lights.................. 209
Specifications............................. 249
Turn Signal Lights..................... 207
Bulbs, Halogen............................... 206 Cables, Jump Starting With.......... 231
Capacities Chart............................. 248
Carbon Monoxide Hazard.............. 47
Carrying Cargo.............................. 137
Cassette Player Care............................................. 121
Operation............................ 107, 119
CAUTION, Explanation of............... ii
CD Player ............................... 110, 122
Center Pocket.................................. 88
Certification Label......................... 246
Chains............................................. 201
Change Oil
How to......................................... 175

When to....................................... 164

Changing a Flat Tire..................... 223
Changing Engine Coolant............. 179
Charging System Indicator.... 52, 235
Checking Automatic Transmission

Fluid........................................ 182

Battery Condition...................... 189
Brake Fluid................................. 183
Drive Belts.................................. 195
Engine Coolant........................... 132

Engine Oil................................... 131
Fuses........................................... 240
Power Steering Fluid................. 184
Checklist, Before Driving............. 140
Childproof Door Locks................... 72

Cigarette Lighter............................. 89

Cleaner, Air.................................... 185

Cleaning
Aluminum Wheels..................... 215
Carpeting.................................... 216

Exterior....................................... 214

Fabric.......................................... 216

Interior........................................ 216

Seat Belts.................................... 217
Vinyl............................................ 216

Window....................................... 217

CLEAN Light................................. 121

Clock, Setting the ............................ 86

CO in the Exhaust......................... 255

Cold Weather, Starting in............. 141
Compact Spare............................... 222
Consumer Information*................ 260
Controls, Instruments and.............. 49ProCarManuals.comMain Menu s t