Evap system HONDA CR-V 2002 RD4-RD7 / 2.G Owners Manual

Thediagramsinthissectiongive
you the dimensions and capacities of
your Honda, and the locations of the
identif ication numbers. It also
includes inf ormation you should
know about your vehicle’s tires and
emissions control systems.................
Identif ication Numbers . 340
................................
Specif ications .342
DOT Tire Quality Grading ......................
(U.S. Vehicles) .344
Unif orm Tire Quality ..................................
Grading .344
.................................
Treadwear .344
......................................
Traction .344
.............................
Temperature .345
.........................
Oxygenated Fuels .346
......
Driving in Foreign Countries . 347.......................
Emissions Controls .348
.....................
The Clean Air Act .348
Crankcase Emissions Control ....................................
System .348
Evaporative Emissions Control ....................................
System .348
Onboard Ref ueling Vapor ................................
Recovery .348
...
Exhaust Emissions Controls . 349
....................
PGM-FI System .349
Ignition Timing Control ................................
System .349
Three Way Catalytic ...........................
Converter .349
....................
Replacement Parts . 349
..
Three Way Catalytic Converter . 350
..............
State Emissions Testing . 351
T echnical Inf ormat ion
T echnical Inf ormation339

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
..............................
Economy, Fuel .190
............
Emergencies on the Road . 307
.............
Battery, Jump Starting . 320
...........
Brake System Indicator . 329................
Changing a Flat Tire . 308
.....
Charging System Indicator . 326
..................
Checking the Fuses . 332
.....
Low Oil Pressure Indicator . 325
...
Malf unction Indicator Lamp . 327
...
Manually Closing Moonroof . 330
..................
Overheated Engine . 323
...........................
Emergency Brake .82
......................
Emergency Flashers .81
......................
Emergency Towing .337
.......................
Emissions Controls .348
.............
Emissions Testing, State . 351
Engine ....
Coolant Temperature Gauge . 74
...................................
Drive Belt .277
......
Engine Speed Limiter . 203,208
Malf unction Indicator ................................
Lamp .66, 327
........
Oil Pressure Indicator . 66,325
..............
Oil, What Kind to Use . 247
...............................
Overheating .323
............................
Specif ications .342
.......................................
Starting .200
......................
Ethanol in Gasoline .346
.
Evaporative Emissions Controls . 348
...............................
Exhaust Fumes .60 Expectant Mothers, Use of Seat
........................................
Belts by .21
..................
Exterior,Cleaningthe .298
............................
Fabric, Cleaning .302
...................................
Fan, Interior .128
Features, Comfort and ..............................
Convenience .127
....................
Filling the Fuel Tank . 185
Filters ................................
Air Cleaner .265
.........................
Dust and Pollen .275
...............................................
Oil .249
5-speed Manual Transmission ...............
Checking Fluid Level . 261
................................
Shif ting the .202
.............
Flashers, Hazard Warning . 81
...................
Flat Tire, Changing a . 308
Dipstick
..........
Automatic Transmission . 260
..................................
Engine Oil .188
..........................
Directional Signals .77
........
Disc Brake Wear Indicators . 211
.....................
Disposal of Used Oil .250
Doors ..............
Locking and Unlocking . 88
......................
Power Door Locks .88
..........
DOT Tire Quality Grading . 344
Downshif ting, 5-speed Manual .............................
Transmission .202
.......................................
Drive Belt .277
...........................................
Driving .197
....................................
Economy .190
.........................
In Bad Weather .215
................
In Foreign Countries . 347
........................
Driving Guidelines .198
..................
Dust and Pollen Filter . 275
Index
E F
III