2002 HONDA CR-V air condition

Î
ÎThe 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 f rom 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 f orm photochemical ‘‘smog.’’
Carbon monoxide does not contri-
bute to smog creation, but it is a
poisonous gas. 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
.
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.
Your vehicle has a Positive
Crankcase Ventilation System. This
keeps gasses that build up in the
engine’s crankcase f rom going into
the atmosphere. The Positive Crank-
case Ventilation valve routes them from the 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.
The Onboard Ref ueling Vapor
Recovery (ORVR) system captures
the f uel vapors during ref ueling. The
vapors are adsorbed in a canister
f illed with activated carbon. While
driving, the f uel vapors are drawn
into the engine and burned of f .
238
The Clean Air Act
Crankcase Emissions Control
System Evaporative Emissions Control
System
Onboard Ref ueling Vapor
Recovery
Emissions Cont rols
T echnical Inf ormation348

The exhaust emissions controls
include three systems: PGM-FI,
Ignition Timing Control and Three
Way Catalytic Converter. These
three 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.The emissions control systems are
covered by warranties separate from
the rest of your vehicle. Read your
warranty manual for more inf orma-
tion. 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 vehicle.
This system constantly adjusts the
ignition timing, reducing the amount
of HC, CO, and NOx produced.
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 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)
or the Powertrain Control Module
(PCM) uses various sensors to
determine how much air is going
into the engine. It then controls how
much f uel to inject under all operat-
ing conditions.
2
2
Replacement Parts
Exhaust Emissions ControlsPGM-FI Syst em
Ignit ion T iming Cont rol Syst emThree Way Catalytic Converter
Emissions Cont rols
T echnical Inf ormation349

CONT INUED
...
Accessories and Modif ications . 191
................................
Accessories .191
.
Additional Safety Precautions . 192
............................
Modif ications .192
ACCESSORY (Ignition Key .......................................
Position) .87
............
Accessory Power Sockets . 122
....................
Additives, Engine Oil . 248
.............................
Airbag (SRS) .10, 54
.....................
Air Cleaner Element .265
..............
Air Conditioning System . 128
..............................
Maintenance .274
.........................................
Usage .128
.......................
Air Outlets (Vents) .130
.......................
Air Pressure, Tires .278
..................
High Speed Driving . 279
.........................
Normal Driving .279
.......................
Alcohol in Gasoline .346
......................................
Antif reeze .251
Anti-lock Brakes (ABS) ...............................
Indicator .68, 214
...................................
Operation .212
..............
Anti-thef t, Audio System . 178Anti-thef t Steering Column
..............................................
Lock .87
..........................
Appearance Care .297
................................
Audio System .137
...
Automatic Seat Belt Tensioners . 52
.............
Automatic Speed Control . 179
..............
Automatic Transmission . 204
..........................
Capacity,Fluid .342
...............
Checking Fluid Level . 260
.......................................
Shif ting .205
.
Shif t Lever Position Indicator . 204
................
Shif t Lever Positions . 205
....................
Shif t Lock Release . 209
Battery Charging System ...........................
Indicator .66, 326
............................
Jump Starting .320
..............................
Maintenance .269
............................
Specif ications .343
..............................
Bef ore Driving .183
....................................
Belts,Seat .8,50
.........................
Beverage Holders .116
.................................
Body Repairs .305 Brakes
...........
Anti-lock System (ABS) . 212
.............
Break-in, New Linings . 184
....................
Bulb Replacement .290
...........................................
Fluid .263
.........................................
Parking .82
.................
System Indicator . 66,329
........................
Wear Indicators .211
.............................
Braking System .211
.................
Break-in, New Vehicle . 184
..
Brightness Control, Instruments . 77
........................
Brights, Headlights .76
.................................
Built-in Table .117
Bulb Replacement ..........................
Back-up Lights .290
..............................
Brake Lights .290
......................
Cargo Area Light .293
..............................
Ceiling Light .293
................
Front Parking Lights . 289
........
Front Side Marker Lights . 288
.................................
Headlights .287
.........
High-mount Brake Light . 292
...........................
Interior Lights .293
...................
License Plate Light . 291
Index
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