2002 HONDA S2000 engine

Î
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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 page
.
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
f orm photochemical ‘‘smog.’’ Carbon
monoxide does not contribute to
smog creation, but it is a poisonous
gas.
Your car has a Positive Crankcase
Ventilation System. This keeps
gasses that build up in the engine’s
crankcase from going into the
atmosphere. The Positive Crankcase
Ventilation valve routes them fromthe 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.
In Canada, Honda vehicles comply
with the Canadian Motor Vehicle
Saf ety Standards (CMVSS) f or
Emissions valid at the time they are
manuf actured. 154
The Clean Air Act
Crankcase Emissions Control
System Evaporative Emissions Control
System
T echnical Inf ormation
Emissions Cont rols
258

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)
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 emissions control systems are
covered by warranties separate f rom
the rest of your car. Read your
warranty manual f or more inf orma-
tion.
The exhaust emissions controls
include f our systems: PGM-FI,
Ignition Timing Control, Secondary
Air Injection System, 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.
During engine warm-up, air is
pumped into the exhaust to reduce
emissions when the engine is cold.
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
Genuine Honda replacement parts or
their equivalent f or repairs. Using
lower quality parts may increase the
emissions f rom your car.
2
2
Exhaust Emissions Controls
Replacement Parts
PGM-FI Syst emIgnit ion T iming Cont rol Syst em
Secondary A ir Inject ion Syst em
Three Way Catalytic Converter
Emissions Cont rols
T echnical Inf ormation 259

Keep the engine tuned-up.
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.
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.
Park your car away f rom high grass,
dry leaves, or other f lammables.
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 car’s three way catalytic
converter. Have your car diagnosed and
repaired if it is misf iring, back-
f iring, stalling, or otherwise not
running properly.
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.
T echnical Inf ormation
Three Way Catalytic Converter
260
TTHHRREEEEWWAAYYCCAATTAALLYYTTIICCCCOONNVVEERRTTEERR

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 on Neutral.
Increase the engine speed to 2,000
rpm and hold it there until the
temperature gauge rises to at least
1/4of thescale(approximately3
minutes).
CONT INUED
T echnical Inf ormation
St at e Emissions T est ing
T esting of Readiness Codes
261

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This manual describes the procedures involved in the
replacement of damaged body parts.
This manual covers maintenance and recommended
procedures f or repair to engine and chassis components.
It is written f or the Journeyman mechanic, but is simple
enough f or most mechanically-inclined owners to under-
stand.
This manual complements the Service Manual by
providing in-depth troubleshooting inf ormation f or each
electrical circuit in your car.
Authorized Manuals
Service Manual:
Electrical T roubleshooting Manual:
Body Repair Manual:
268 NOTE: Dealers and Companies please provide dealer or company name,
and also the name of the person to whose attention the shipment should
be sent. For purchases outside U.S.A. please write to the address shown
below for a quotation.
P.O. BOX 07280·DETROIT, MICHIGAN 48207·1-800-782-4356
Customer Name
Attention
Apartment Number
State & Zip Code
City
Daytime Telephone Number
Check or money order enclosed payable to Helm Inc U.S. funds only.
Do not send cash
Master
Card VISA Check here if your billing address is different
from the shipping address shown above.
Account Number Expiration: Mo. Yr.
CUSTOMER SIGNATURE DATE
Street Address No P.O. Box Number
()
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.

CONT INUED
Accessories.................................
Installation . 128
...............
Accessory Power Socket . 80
ACCESSORY (Ignition Key
.......................................
Position) . 59
....................
Additives, Engine Oil . 164
.....................................
Airbag (SRS) . 9
.....................
Air Cleaner Element . 178
..............................
Air Conditioning . 84
..............................
Maintenance . 188
............................................
Usage . 84
.........................
Air Outlets (Vents) . 86
.......................
Air Pressure, Tires . 191
...........................
Alarm, Anti-theft . 116
.......................
Alcohol in Gasoline . 256
.......
Aluminum Wheels, Cleaning . 212
......................................
Antif reeze . 167
Anti-lock Brakes (ABS)
....................
Indicator Light . 45, 145
...................................
Operation . 143
.
Anti-thef t Steering Column Lock . 58
..........................
Anti-thef t System . 116
..........................
Appearance Care . 209
......................................
Audio Panel . 80 ..................................
Audio System . 92
................
Automatic Car Washes . 210
...............
Automatic Speed Control . 55
........
Back-up Lamp Replacement . 204
Battery
Charging System ...........................
Indicator . 44, 235
............................
Jump Starting . 228
..............................
Maintenance . 183
............................
Specif ications . 253
..............................
Bef ore Driving . 121
..........................................
Belts, Seat . 8
.............................
Beverage Holder . 80
...................................
Body Repair . 217
............................................
Brakes . 142
...........
Anti-lock System (ABS) . 143
.............
Break-in, New Linings . 122
....................
Bulb Replacement . 204
...........................................
Fluid . 176
.........................................
Parking . 79
.........................
System Indicator . 44
..............
Wear Indicators, Disc . 142
.............................
Braking System . 142 ........................
Break-in, New Car . 122
..
Brightness Control, Instruments . 52
........................
Brights, Headlights . 51
.........................
Bulb Replacement . 200
..........................
Back-up Lights . 204
..............................
Brake Lights . 204
.................................
Headlights . 200
.................
License Plate Lights . 206
..................
Side Marker Lights . 202
............................
Specif ications . 253
....................
Turn Signal Lights . 202
..............................
Bulbs, Halogen . 200
............................
Capacities Chart . 252
.............
Carbon Monoxide Hazard . 39
............................
Cargo, Carrying . 130
..............
CAUTION, Explanation of . ii
...................................
CD Changer . 106
........................
Certif ication Label . 250
............................................
Chains . 197
Index
B
A
C
I

Changing Oil........................................
How to . 165
......................................
When to . 152
....................
Changing a Flat Tire . 221
............
Changing Engine Coolant . 169
...
Charging System Indicator . 44, 235
...............
Check Engine Light . 45, 236
............
Checklist, Bef ore Driving . 136
.....................................
Child Saf ety . 19
.......................................
Child Seats . 22
...................................
Cleaner, Air . 178
.........................................
Cleaning . 209
....................
Aluminum Wheels . 212
...................................
Carpeting . 213
......................................
Exterior . 210
.................................
Floor Mats . 213
.......................................
Interior . 213
.......................................
Leather . 214
...................................
Seat Belts . 214
...........................................
Vinyl . 214
....................................
Windows . 215
...................................
Clutch Fluid . 177
........................
CO in the Exhaust . 258
............
Cold Weather, Starting in . 138
......................
Compact Spare Tire . 220
.............
Controls, Instruments and . 41 ................................
Covertible Top . 70
...............
Convertible Top Cover . 75
..
Lowering the Convertible Top . 70
................................
Maintenance . 76
........
Raising the Covertible Top . 73
Coolant ........................................
Adding . 167
....................................
Checking . 126
.........................
Proper Solution . 167
...................
Temperature Gauge . 47
....................
Corrosion Protection . 215
Crankcase Emission Control
........................................
System . 258
..............
Cruise Control Operation . 55
Customer Relations
................................
Inf ormation . 264
..............................
Economy, Fuel . 127
............
Emergencies on the Road . 219
.............
Battery, Jump Starting . 228
................
Changing a Flat Tire . 221
.....
Charging System Indicator . 235
..................
Checking the Fuses . 241
................
DANGER, Explanation of . ii
.......................................
Dashboard . 42
................
Daytime Running Lights . 52
............
Defects, Reporting Safety . 268
................
Defrosting the Windows . 89
....................................
Dimensions . 252
...............
Dimming the Headlights . 51 Dipstick
..................................
Engine Oil . 125
..........................
Directional Signals . 53
........
Disc Brake Wear Indicators . 142
.....................
Disposal of Used Oil . 166
...................
Do Not Tow a Trailer . 147
Doors
..............
Locking and Unlocking . 60
..............................
Monitor Light . 45
......................
Power Door Locks . 60
..........
DOT Tire Quality Grading . 254
Downshif ting, 6-speed Manual
.............................
Transmission . 140
...........................................
Driving . 135
....................................
Economy . 127
.........................
In Bad Weather . 146
................
In Foreign Countries . 257
Index
D
E
II

CONT INUED
...
Closing the Convertible Top . 239
.....
Low Oil Pressure Indicator . 234
...
Malf unction Indicator Lamp . 236
..................
Overheated Engine . 231
...........................
Emergency Brake . 79
......................
Emergency Flashers . 78
............
Emergency Trunk Opener . 65
.......................
Emissions Controls . 258
.............
Emissions Testing, State . 261 Engine
...........
Check Engine Light . 45, 236
Compartment, Checking
......................................
in the . 124
.......................................
Coolant . 126
....
Coolant Temperature Gauge . 47
...................................
Drive Belt . 190
Malf unction Indicator
................................
Lamp . 45, 236
........
Oil Pressure Indicator . 44, 234
..............
Oil, What Kind to Use . 163
...............................
Overheating . 231
............................
Specif ications . 252
............................
Speed Limiter . 140
.......................................
Starting . 137
.........
Engine Cover, Opening the . 124
......................
Ethanol in Gasoline . 256 ...
Evaporative Emission Controls . 258
...............................
Exhaust Fumes . 39
Expectant Mothers, Use of Seat
........................................
Belts by . 17
..................
Exterior, Cleaning the . 210
..........................................
Gasohol . 256
.........................................
Gasoline . 122
...............
Fuel Reserve Indicator . 46
...........................................
Gauge . 48
................
Octane Requirement . 122
.....................
Oxygenated Fuels . 256
........................
Tank, Filling the . 123
............................
Fabric, Cleaning . 214
.....................................
Fan, Interior . 84
Features, Comfort and
................................
Convenience . 83
....................
Filling the Fuel Tank . 123
Filters
...............................................
Oil . 165
.............
Flashers, Hazard Warning . 78
...................
Flat Tire, Changing a . 221
Fluids
..........................................
Brake . 176
.........................................
Clutch . 177
..............
Manual Transmission . 174
..................
Windshield Washer . 173
........
FM Stereo Radio Reception . 101
.....
Foreign Countries, Driving in . 257
..........................
Four-way Flashers . 78 .................................................
Fuel . 122
......................
Fill Door and Cap . 123
...........................................
Gauge . 48
................
Octane Requirement . 122
...............................
Oxygenated . 256
........................
Reserve Indicator . 46
........................
Tank, Filling the . 123
..............
Fuel Mileage, Improving . 127
..............
Fuel Station Procedures . 123
.....................
Fuses, Checking the . 241
Index
F
G
III