2000 HONDA S2000 engine

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 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.
250 Technical Information
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
148.
* 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's
crankcase 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 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.

Exhaust Emissions Controls
The exhaust emissions controls
include four 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 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)
uses various sensors to determine
how much air is going into the
engine.
It then controls how much
fuel to inject under all operating
conditions.
Ignition Timing Control System
This system constantly adjusts the
ignition timing, reducing the amount
of
HC, CO and NOx produced.
Secondazy Air Injection System
During engine warm-up, air is
pumped into the exhaust to reduce
emissions when
the engine is cold.
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
(COz), dinitrogen
(Nz), and water vapor.
Emissions Controls
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 new
Genuine 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 251

Three Way Catalytic Converter
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 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 fire any com­
bustible materials that come near
it.
Park your car away from high grass,
dry leaves, or other flammables.
252 Technical Information
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.

Authorized Manuals
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260
Service 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.
Electrical Troubleshooting Manual:
This manual complements the Service Manual by
providing in-depth troubleshooting information for each
electrical circuit
in your car.
Body Repair Manual:
This manual describes the procedures involved in the
replacement of damaged body parts.

A
Accessories Installation .................................. 122
Accessory
Power Socket ................ 81
ACCESSORY (Ignition Key
Position) ........................................
61
Adding
Brake Fluid ................................. 170
Clutch Fluid ................................ 171
Engine Coolant.. ......................... 161
Engine
Oil ................................... 157
Manual Transmission Fluid ..... 168
Windshield
Washer Fluid ......... 167
Additional Information About
Your
Seat Belts ........................ 33
Lap/Shoulder Belt.. ..................... 33
Seat Belt Maintenance ................ 34
Seat Belt System Components
... 33
Additional Information About
Your SRS ...................................
37
Additional Safety Precautions .... 38
How
the Automatic Seat Belt
Tensioners Work ..................... 37
How Your Airbags Work ............ 35
How the SRS Indicator
Works ........................................ 37
SRS Components ......................... 35
Additives, Engine Oil... .................. 158
Adjustments
Mirrors ..........................................
79
Seats .............................................. 68
Airbag (SRS) ...................................... 9
Air Cleaner Element.. ....................
l72
Air Conditioning ............................... 86
Maintenance ............................... 182
Usage ............................................. 86
Air Outlets (Vents) .......................... 88
Air Pressure,
Tires ........................ 185
Alarm, Anti-theft.. .......................... 113
Alcohol in Gasoline ........................ 248
Aluminum Wheels, Cleaning ........
206-
Antifreeze ....................................... 161
Anti-lock
Brakes (ABS)
Indicator Light ..................... 45, 138
Operation .................................... 136
Anti-theft Steering Column Lock
.. 60
Anti-theft System ........................... 113
Appearance Care ...........................
203
Audio Panel. ...................................... 82
Audio System ................................... 94
Index
Automatic Car Washes ................. 204
Automatic Speed Control.. .............. 55
IB
Back-up Lamp Replacement.. ....... 198
Battery Charging System
Indicator.. .......................... 44, 227
Jump Starting ............................. 220
Maintenance ............................... 177
Specifications ............................. 245
Before Driving ............................... 115
Belts, Seat ........................................... 8
Beverage Holder ..............................
81
Body Repair .................................... 210
Brakes ............................................. 136
Anti-lock System (ABS) ............ 137
Break-in, New Linings .............. 116
Fluid ............................................
170
Light, Burned-out ...................... 198
Parking .......................................... 80
System Indicator .......................... 44
Wear Indicators, Disc ............... 136
CONTINUED

Index
Brakes,ABS Certification Label ......................... 242
Vinyl ............................................ 207
Operation
.................................... 137 Chains ............................................. 191 Windows ..................................... 208
System
Indicator .................. 44, 139 Change Oil Climate Control System .................. 86
Braking System .............................. 136 Howto ......................................... 159 Clutch Fluid .................................... 171
Break-in, New Car ......................... 116 When to ....................................... 146 CO in the Exhaust ......................... 250
Brightness Control, Instruments ... 52 Changing a Flat Tire ..................... 213 Cold Weather, Starting in ............. 132
Brights, Headlights ......................... 51 Changing Engine Coolant.. ........... 163 Compact Spare Tire ....................... 212
Bulb Replacement... ....................... 192 Charging System Indicator .... 44, 227 Controls, Instruments and .............. 41
Back-up Lights ........................... 198 Check Engine Light ................ 45, 228
Covertible Top ................................. 71
Brake Lights ............................... 198 Checking
Closing the Convertible Top ...... 7 4
Headlights ..................................
195 Battery Condition ...................... 177 Convertible Top Cover. ............... 76
License Plate Lights .................. 200 Brake Fluid ................................. 170 Maintenance ................................. 77
Parking Lights ........................... 196 Clutch Fluid ................................ 171 Opening the Covertible Top ....... 71
Side Marker Lights ................... 198
Drive Belt.. .................................. 184 Coolant
Specifications .............................
245 Engine Coolant.. ......................... 120 Adding ......................................... 161
Turn Signal Lights ..................... 196 Engine Oil.. ................................. 119 Checking ..................................... 120
Bulbs, Halogen ............................... 194 Fuses ........................................... 232 Proper Solution .......................... 161
Manual Transmission Fluid ..... 168 Temperature Gauge .................... 47
c Checklist, Before Driving ............. 115 Corrosion Protection ..................... 208
Cleaner, Air .................................... 172 Crankcase Emission Control
Cables, Jump Starting With ..........
220 Cleaning .......................................... 203 System ......................................... 250
Capacities Chart. ............................ 244
Aluminum Wheels ..................... 206 Cruise Control Operation ............... 55
Carbon Monoxide Hazard .............. 39 Exterior ....................................... 204 Customer Relations
Cargo, Carrying .............................
124 Interior ........................................ 207 Information ................................. 254
CAUTION, Explanation of ............... ii Leather ........................................ 207
CD Changer. ................................... 107 Seat Belts .................................... 207
II

Index
D In Bad Weather. ......................... 140 Malfunction Indicator
In Foreign Countries .................
249 Lamp ................................. 45, 228
DANGER, Explanation of.. ............... ii Oil Pressure Indicator ......... 44, 226
Dashboard ........................................
42 E Oil, What Kind to Use ............... 157
Daytime Running Lights ................. 52 Overheating ................................ 223
Dead Battery, What to Do ............ 220 Economy, Fuel ............................... 121 Specifications ............................. 244
Defects, Reporting
Safety ............. 258 Emergencies on the Road ............. 211 Engine Cover, Opening the .......... 118
Defrosting
the Windows ................. 91 Battery, Jump Starting .............. 220 Ethanol in Gasoline ....................... 248
Dimensions ..................................... 244 Changing
a Flat Tire .................
213 Evaporative Emission Controls .... 250
Dimming the Headlights ................ 51 Charging System Indicator ...... 227 Exhaust Fumes ................................ 39
Dipstick Checking the Fuses ................... 232 Expectant Mothers, Use of Seat
Engine Oil.. ................................. 119 Closing the Convertible Top .... 230 Belts by ......................................... 17
Directional Signals ........................... 53 Low Oil Pressure Indicator ...... 226 Exterior,
Cleaning the ................... 204
Disabled, Towing Your Car If ...... 238 Malfunction Indicator Lamp .... 228
Disc Brake
Wear Indicators ......... 136 Overheated Engine ................... 223 F
Disposal of Used Oil.. .................... 160 Emergency Brake ............................ 80
Do Not Tow a Trailer .................... 141 Emergency Flashers ....................... 79 Fabric, Cleaning ............................. 207
Doors Emission
Controls ......................... 250 Fan, Interior ...................................... 86
Locking and Unlocking ............... 62 Engine Features, Comfort and
Monitor Light.. .............................
45 Check Engine Light ............ 45, 228 Convenience
................................. 85
Power Door Locks ....................... 62 Compartment, Checking Filling the Fuel Tank ..................... 117
DOT Tire Quality Grading ........... 246
in the ....................................... 118
Downshifting, 6-speed Manual Coolant ........................................ 120
Transmission .............................. 134 Coolant Temperature Gauge ..... 4 7
Driving ............................................
129 Drive Belt. ................................... 184
Economy ..................................... 121 CONTINUED
Ill

Index
Filters
Oil ................................................ 159
Flashers, Hazard Warning .............. 79
Flat Tire, Changing a .................... 213
Fluids
Brake ...........................................
170
Clutch
.......................................... 171
Manual Transmission ............... 168
Windshield Washer ................... 167
FM Stereo Radio Reception ......... 100
Foreign Countries, Driving in ...... 249
Four-way Flashers ........................... 79
Front End, Towing by Emergency
W reeker ......................................
238
Fuel .................................................. 116
Fill Door and
Cap ....................... 117
Gauge ............................................ 48
Octane Requirement.. ............... 116
Oxygenated ................................ 248
Reserve Indicator .........................
46
Tank, Filling the ......................... 117
Fuel Mileage, Improving ............... 121
Fuel Station Procedures ............... 117
Fuses, Checking the ...................... 232
IV
G
Gasohol ........................................... 248
Gasoline .......................................... 116
Fuel Reserve Indicator. ...............
46
Gauge ............................................ 48
Octane Requirement ................. 116
Oxygenated Fuels ...................... 248
Tank, Filling the .........................
117
Gauges .............................................. 47
Engine Coolant Temperature .... 47
Fuel ................................................ 48
Gearshift Lever Positions
6-speed Manual
Transmission ..........................
133
Glass Cleaning ............................... 208
IH
Halogen Headlight Bulbs .............. 194
Hazard Warning Flashers ............... 79
Headlights
Daytime Running Lights .............
52
High Beam Indicator ................... 46
High Beams, Turning on ............ 51
Low Beams, Turning on ............. 51
Reminder Tone ............................ 51
Replacing Halogen Bulbs ......... 195
Turning on .................................... 51
Heating and Cooling System .......... 86
High Altitude, Starting at.. ............ 132
High-Low Beam Switch .................. 51
High Speed, Shifting at ................. 134
Hood Latch ..................................... 17 4
Hood, Opening
the ........................ 118
Hot Coolant, Warning about ........ 161
Hydraulic Clutch ............................ 171
Hydroplaning .................................. 141
I
Identification Number,
Vehicle ........................................
242
If Your Car has to be Towed ........ 238
Ignition
Keys ...............................................
58
Switch ............................................ 60
Timing Control System ............. 251
Indicator Lights, Instrument
Panel .............................................. 43
Inflation, Proper Tire .................... 185
Inside Mirror .................................... 79