2001 HONDA ACCORD SEDAN air condition

Emissions Controls

The burning of gasoline in your car's engine produces several byproducts.
Some of these are carbon monoxide (CO), oxides of nitrogen (NOx) and
hydrocarbons (HC). Gasoline evaporating from the tank also
produces hydrocarbons. Controlling
the production of NOx, CO, and HC is important to the environment.
Under certain conditions of sunlightand climate, NOx and HC react to
form photochemical "smog." Carbon monoxide does not contribute tosmog 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
224.

* 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 car has a Positive Crankcase
Ventilation System. This keeps gasses that build up in the engine'scrankcase from going into the
atmosphere. The Positive Crankcase
Ventilation valve routes them from the crankcase back to the intake
manifold. They are then drawn into
the engine and burned.
Evaporative Emissions Control

System

As gasoline evaporates in the fuel tank, an evaporative emissions
control canister filled with charcoaladsorbs 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.
Onboard Refueling Vapor
Recovery
The Onboard Refueling Vapor Recovery (ORVR) system captures
the fuel vapors during refueling. The
vapors are adsorbed in a canister filled with activated carbon. While driving, the fuel vapors are drawn
into the engine and burned off.
Technical Information

Emissions Controls

Exhaust Emissions Controls
The exhaust emissions controls include three systems: PGM-FI,Ignition Timing Control and Three
Way Catalytic Converter. These three systems work together tocontrol the engine's combustion and
minimize the amount of HC, CO, and
NOx that comes out the tailpipe. The
exhaust emissions control systemsare 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 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 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.
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 (CO 2), 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 car.

The emissions control systems are
covered by warranties separate from

the rest of your car. Read your

warranty manual for more informa-
tion.
Technical Information

Index

Accessories and Modifications.... 186 Accessories................................. 186Additional Safety Precaution.... 187 Modifications............................. 187
ACCESSORY (Ignition Key Position)........................................ 74
Accessory Power Socket.............. 106
Additives, Engine Oil..................... 234
Airbag (SRS) ...................................... 9

Air Cleaner Element...................... 253

Air Conditioning............................. 110
Maintenance............................... 265

Usage.......................................... 110

Air Conditioning Filter.................. 266
Air Pressure, Tires........................ 268
Alcohol in Gasoline........................ 331

Antifreeze....................................... 239

Anti-lock Brakes (ABS)
Description................................. 204

Indicator............................... 55, 205
Operation.................................... 204

Anti-theft Steering Column Lock.. 73

Appearance Care........................... 287

Audio System................ 125, 137, 153

Automatic Speed Control................

68


Automatic Transmission............... 196

Capacity, Fluid........................... 326

Checking Fluid Level....... 247, 249
Shifting........................................ 196

Shift Lever Position Indicator.. 197

Shift Lever Positions................. 197

Shift Lock Release..................... 200

Battery Charging System Light...... 54, 310

Jump Starting............................. 304
Maintenance............................... 260

Specifications............................. 329

Before Driving............................... 177

Belts, Seat........................................... 8
Beverage Holder............................ 104
Body Repair.................................... 296
Brakes Anti-lock System (ABS)............ 204Break-in, New Linings .............. 178
Bulb Replacement..................... 281

Fluid............................................ 251
Parking........................................ 101
System Indicator.......................... 55
Wear Indicators......................... 203
Braking System.............................. 203
Break-in, New Car......................... 178 Brightness Control, Instruments... 63
Brights, Headlights......................... 62
Bulb Replacement Back-up Lights........................... 281
Brake Lights............................... 281Ceiling Light............................... 282
Courtesy Light........................... 283
Front Parking Lights................. 278
Front Side Marker Lights......... 277
Headlights.................................. 276
High-mount Brake Light.......... 281
License Plate Lights.................. 281
Specifications............................. 327
Spotlight...................................... 283
Trunk Light................................ 284
Turn Signal Lights..................... 277
Bulbs, Halogen............................... 276

CONTINUED

Index
Driving............................................ 191 Economy..................................... 185
In Bad Weather.......................... 209
In Foreign Countries................. 332
Economy, Fuel............................... 185
Emergencies on the Road............. 295 Battery, Jump Starting.............. 304
Brake System Indicator............ 313Changing a Flat Tire................. 297
Charging System Indicator...... 310
Checking the Fuses................... 316
Low Oil Pressure Indicator...... 309
Malfunction Indicator Lamp.... 311 Manually Closing Moonroof.... 314
Overheated Engine................... 307
Emergency Brake.......................... 101
Emergency Flashers....................... 66
Emergency Towing....................... 320
Emissions Controls........................ 333
Engine
Belts.............................................266

Coolant Temperature Gauge ..... 59 Malfunction Indicator
Lamp................................. 55, 311
Oil Pressure Indicator......... 54, 309 Oil, What Kind to Use............... 234
Overheating................................ 307
Specifications............................. 327
Speed Limiter..................... 196, 200
Starting........................................ 193
Engine Speed Limiter........... 196, 200
Ethanol in Gasoline ....................... 331
Evaporative Emissions Controls.. 333
Exhaust Fumes................................ 49
Expectant Mothers, Use of Seat Belts by......................................... 17
Exterior, Cleaning the................... 290
Fabric, Cleaning............................. 291

Fan, Interior.................................... 110

Features, Comfort and Convenience............................... 109

Filling the Fuel Tank..................... 178
Filter
Air Conditioning........................ 266
Oil................................................ 234 5-speed Manual Transmission
Checking Fluid Level................ 249
5-speed Manual Transmission Shifting the................................. 195
Flashers, Hazard Warning.............. 66
Flat Tire, Changing a.................... 297
Fluids Automatic Transmission .. 247, 248
Brake...........................................251
Clutch.......................................... 252
Manual Transmission............... 249 Power Steering........................... 252
Windshield Washer................... 246
FM Stereo Radio Reception.................................... 158
Folding Rear Seat............................ 92
Foreign Countries, Driving in...... 332
Four-way Flashers........................... 66
Fuel.................................................. 178 Fill Door and Cap....................... 178Gauge............................................ 58
Octane Requirement................. 178
Oxygenated................................ 331
Tank, Filling the......................... 178
Fuses, Checking the...................... 316
CONTINUED