2000 Acura RL engine

Emission
s Control s

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 sunlight
and climate, NOx and HC react to
form photochemical "smog." Carbon
monoxide does not contribute to smog creation, but it is a poisonous

gas.
Th
e Clea n Ai r Ac t

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
206.

* In Canada, Acura vehicles comply

with the Canadian Motor Vehicle
Safety Standards (CMVSS) for

Emissions valid at the time they are

manufactured.

Crankcas e Emission s Contro l
Syste m
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.
Evaporativ e Emission s Contro l
Syste m
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.
Onboar d Refuelin g Vapo r
Recover y
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 Informatio n

Emission
s Control s

Exhaus t Emission s Control s
The exhaust emissions controls include four systems: PGM-FI,
Ignition Timing Control, ExhaustGas 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 areseparate 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. Throughchemical reactions, it converts HC,
CO, and NOx in the engine's exhaust
to carbon dioxide (CO 2), dinitrogen
(N 2), and water vapor. Replacemen
t Part s

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 Acura 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.

Technica l Informatio n

Thre
e Wa y Catalyti c Converte r
The three way catalytic converter contains precious metals that serve
as catalysts, promoting chemical
reactions to convert the exhaust
gasses without affecting the metals.
The catalytic converter is referred to as a three-way catalyst, since it acts
on HC, CO, and NOx. A replacement
unit must be an original Acura 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 fire any com-
bustible materials that come near it. Park your car away from high grass,dry leaves, or other flammables. A defective three way catalytic
converter contributes to air pollution,
and can impair your engine's per-
formance. Follow these guidelines to protect your car'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 ineffective. Keep the engine tuned-up.
Have your car diagnosed and
repaired if it is misfiring, back-
firing, stalling, or otherwise not running properly.

Technical Informatio n

THRE
E WA Y CATALYTI C CONVERTE R

Authorize
d Manual s

These Publications cannot be returned for credit without receiving advance authorization within 14 days of delivery. On returns, a restocking fee may be applied against the original order.
P.O. BOX 07280 DETROIT, MICHIGAN 48207 1-800-782-4356
Servic
e Manual :
This manual covers maintenance and recommended procedures for repair to engine and chassis components.
It is written for the Journeyman mechanic, but is simple
enough for most mechanically-inclined owners to under-
stand.

Electrica l Troubleshootin g Manual :
This manual complements the Service Manual by providing in-depth troubleshooting information for each
electrical circuit in your vehicle.
Bod y Repai r Manual :
This manual describes the procedures involved in the replacement of damaged body parts.

Inde
x

Accessories and Modifications.... 174 Accessories................................. 174
Additional Safety Precautions.. 175Modifications............................. 175
ACCESSORY (Ignition Key Position)........................................ 80
Accessory Power Socket.............. 114
Adding Automatic Transmission

Fluid........................................ 226

Brake Fluid................................. 227

Differential Oil........................... 227

Engine Coolant........................... 219

Engine Oil................................... 215

Power Steering Fluid................. 228
Windshield Washer Fluid......... 225
Additional Information About Your Airbags............................ 48
Additional Safety Precautions.... 48
Airbag Service.............................. 48
Additional Information About Your Front Airbags................. 43
How the SRS Indicator Works... 45
How Your Front Airbags

Work.......................................... 43

SRS Components......................... 43
Additional Information About Your Seat Belts........................ 40
Automatic Seat Belt Tensioners................................ 41
Lap/Shoulder Belt....................... 40
Seat Belt Maintenance................ 42
Seat Belt System Components... 40
Additional Information About
Your Side Airbags.................... 46
How The Side Airbag Indicator Light Works............................. 47
How Your Side Airbags Work.... 46
Additives, Engine Oil..................... 216
Adjustments Head Restraints........................... 95
Mirrors.......................................... 98

Seats.............................................. 93

Steering Wheel............................ 71

Airbag (SRS).......................... 9, 43, 46

Air Cleaner Element...................... 229
Air Conditioning Filter.................. 240
Air Conditioning System............... 120
Maintenance............................... 239
Usage.................................. 122, 127
Air Outlet
s (Vents)........................ 120
Air Pressure, Tires........................ 242
Alarm, Anti-theft............................ 162
Alcohol in Gasoline........................ 303
Aluminum Wheels, Cleaning........ 263
Antifreeze....................................... 219
Anti-lock Brakes (ABS)
Indicator Light..................... 56, 187
Operation.................................... 18
6
Anti-theft, Audio System............... 162
Anti-theft Steering Column

Lock............................................... 80

Anti-theft System........................... 163

Appearance Care........................... 261

Armrest............................................. 96

Ashtrays.......................................... 116 Audio Controls, Remote................ 161

Audio System................................. 134
Automatic Climate Control System......................................... 120
Automatic Lighting.......................... 64
Automatic Seat Belt Tensioners.................................... 41
CONTINUED

Inde
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Automatic Speed Control................ 73

Automatic Transmission............... 180
Capacity, Fluid........................... 298

Checking Fluid Level................ 226

Shifting........................................ 180

Shift Lever Position Indicator.. 180

Shift Lever Positions................. 180

Shift Lock Release..................... 183

Battery
Charging System
Indicator............................ 54, 283

Jump Starting............................. 278

Maintenance............................... 234
Specifications............................. 299
Before Driving............................... 165
Belts, Seat..................................... 8, 40
Beverage Holder............................ 111
Body Repair.................................... 267

Brakes
Anti-lock System (ABS)............ 186
Break-in, New Linings .............. 166
Fluid............................................ 227
Light, Burned-out...................... 254 Parking........................................ 108
System Indicator.................. 54, 285
Wear Indicators......................... 185
Brakes, ABS Operation.................................... 186System Indicator.................. 56, 187
Braking System.............................
. 185
Break-in, New Car......................... 166
Brightness Control, Instruments... 66
Brights, Headlights......................... 63
Bulb Replacement Back-up Lights........................... 254
Brake Lights............................... 254
Ceiling Lights............................. 257
Courtesy Lights......................... 257
Fog Lights.................................. 251 Front Side Marker Lights......... 253
Headlights.................................. 250
High-mount Brake Light.......... 255
License Plate Lights.................. 256
Specifications............................. 299
Trunk Light................................ 258
Turn Signal Lights..................... 253
Bulbs, Halogen............................... 250
Cables, Jump Starting With.......... 278

Cancel Button................................... 75

Capacities Chart............................. 298

Carbon Monoxide Hazard.............. 49

Carrying, Cargo............................. 174

Cassette Player

Care............................................. 154

Operation........................... 139, 151

CAUTION, Explanation of............... ii

CD Changer................. 142, 155, 157

Ceiling Lights................................. 117

Certification Label......................... 296

Chains............................................. 247

Change Oil
How to......................................... 217

When to....................................... 206

Changing a Flat Tire..................... 271

Changing Engine Coolant............. 221

Charging System Indicator.... 54, 283

Checking Automatic Transmission

Fluid........................................ 226

Battery Condition...................... 234

Brake Fluid................................. 227

Inde
x

Differential Oil........................... 227

Drive Belts.................................. 240
Engine Coolant........................... 170

Engine Oil................................... 169

Fuses........................................... 288 Power Steering Fluid................. 228
Checklist, Before Driving............. 178
Childproof Door Locks................... 85
Cigarette Lighter........................... 115
Cleaner, Air.................................... 229
Cleaning Aluminum Wheels..................... 263
Carpeting.................................... 264
Exterior....................................... 262
Fabric.......................................... 264
Interior........................................ 264

Leather........................................ 264

Seat Belts.................................... 264
Vinyl............................................ 264
Windows..................................... 265

Wood Trim................................. 265

Climate Control System................ 120
Clock, Setting the.......................... 108
Code, Audio System...................... 162
CO in the Exhaust......................... 305
Coin Box......................................... 112 Cold Weather, Starting in............. 179
Compact Spare............................... 270
Console Compartment.................. 112
Consumer Information*................ 310
Controls, Instruments and.............. 51
Coolant
Adding......................................... 219
Checking..................................... 170
Proper Solution.......................... 219
Replacing.................................... 221
Temperature Gauge.................... 60
Corrosion Protection..................... 266
Courtesy Lights............................. 118 Crankcase Emissions Control System......................................... 305
Cruise Control Operation............... 73
Customer Relations Office........... 310
DANGER, Explanation of................. ii
Dashboard.................................... 2, 52
Daytime Running Lights................. 65
Dead Battery, What to Do............ 278
Defects, Reporting Safety............. 313
Defogger, Rear Window................. 71
Defrosting the Windows....... 126, 131

DEXRON
®
III Automatic

Transmission Fluid.................... 226

Differential Oil ............................... 227

Dimensions..................................... 298
Dimming the Headlights................ 63

Dipstick
Automatic Transmission........... 226

Engine Oil................................... 169

Directional Signals........................... 66

Disabled, Towing Your Car If...... 292

Disc Brake Wear Indicators......... 185

Disposal of Used Oil...................... 218

Doors
Locking and Unlocking............... 81

Lockout Prevention..................... 82

Monitor Light............................... 57

Power Door Locks....................... 81

DOT Tire Quality Grading........... 301

Drive Belts...................................... 240

Driver and Passenger Safety............ 5

CONTINUED

Inde
x

Driving............................................ 177
Economy..................................... 171

In Bad Weather.......................... 192

In Foreign Countries................. 304

Driving Position Memory
System......................................... 100

Economy, Fuel............................... 171

Emergencies on the Road............. 269
Battery, Jump Starting.............. 278

Brake System Indicator............ 285
Changing a Flat Tire................. 271

Charging System Indicator...... 283

Checking the Fuses................... 288

Low Oil Pressure Indicator...... 282

Malfunction Indicator Lamp.... 284

Manually Closing Moonroof.... 286

Overheated Engine................... 280

Emergency Brake.......................... 108

Emergency Flashers....................... 70

Emergency Towing....................... 292

Emissions Controls........................ 305

Engine
Belts............................................. 240
Coolant Temperature Gauge ..... 60
Malfunction IndicatorLamp................................. 55, 284
Oil Pressure Indicator......... 54, 282
Oil, What Kind to Use............... 215
Overheating................................ 280
Specifications............................. 299
Speed Limiter............................. 182
Engine Speed Limiter.................... 182
Ethanol in Gasoline ....................... 303
Evaporative Emissions Controls.. 305
Exhaust Fumes................................ 49
Exhaust Gas Recirculation
System......................................... 306

Expectant Mothers, Use of Seat Belts by......................................... 18
Exterior, Cleaning the................... 262

Fabric, Cleaning............................. 264

Fan, Interior........................... 124, 129

Features, Comfort and
Convenience............................... 119

Filling the Fuel Tank..................... 167
Filters
Air Cleaner................................. 229
Air Conditioning........................ 240

Oil................................................ 217

First Gear, Shifting........................ 182
Flashers, Hazard Warning.............. 70
Flat Tire, Changing a.................... 271

Fluids
Automatic Transmission........... 226
Brake........................................... 227
Differential................................. 227
Power Steering........................... 228
Windshield Washer................... 225
FM Stereo Radio
Reception............................ 135, 145
Fog Lights......................................... 67
Foreign Countries, Driving in...... 304
Four-way Flashers........................... 70
Front Airbags............................... 9, 43
Front End, Towing by Emergency Wrecker................. 292
Fuel.................................................. 166
Fill Door and Cap....................... 167

Gauge............................................ 60
Octane Requirement................. 166

Oxygenated................................ 303