2004 HONDA ACCORD COUPE sensor

Make sure the rear f loor mat is
properly hooked to the f loor mat
anchor. Your vehicle is equipped
with f ront passenger’s seat weight
sensors. If the rear passenger’s f loor
mat is on the seat rail of the f ront
passenger’s seat, the sensors will
detect the decreased weight on the
seat and they may not work properly.
If you use non-Honda f loor mats,
make sure they f it properly and that
theycanbeusedwiththefloormat
anchors. Do not put additional f loor
mats on top of the anchored mat.
Maint enance
Floor Mat s
241
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If you are planning to take your
Honda outside the U.S. or Canada,
contact the tourist bureaus in the
areas you will be traveling in to f ind
out about the availability of unleaded
gasoline with the proper octane
rating.
If unleaded gasoline is not available,
be aware that using leaded gasoline
in your Honda will af f ect perf or-
mance and fuel mileage, and damage
its emissions controls. It will no
longer comply with U.S. and
Canadian emissions regulations, and
will be illegal to operate in North
America. To bring your vehicle back
into compliance will require the re-
placement of several components,
such as the oxygen sensors and the
three way catalytic converter. These
replacements are not covered under
warranty.
Driving in Foreign Countries
T echnical Inf ormation292
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The exhaust emissions controls
include f our systems: PGM-FI,
Ignition Timing Control, Exhaust
Gas 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 are
separate f rom the crankcase and
evaporative emissions control
systems.
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.
This system constantly adjusts the
ignition timing, reducing the amount
of HC, CO, and NOx produced.
The Exhaust Gas Recirculation
(EGR) system takes some of the
exhaust gas and routes it back into
the intake manif old. Adding exhaust
gas to the air/f uel mixture reduces
the amount of NOx produced when
the f uel is burned.
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
Honda replacement parts or their
equivalent f or repairs. Using lower
qualitypartsmayincreasethe
emissions f rom your vehicle.
The emissions control systems are
covered by warranties separate f rom
the rest of your vehicle. Read your
warranty manual f or more inf orma-
tion.
2
2
Emissions Cont rols
T echnical Inf ormation
Exhaust Emissions Controls Replacement Parts
PGM-FI Syst emIgnit ion T iming Cont rol Syst em
Exhaust Gas Recirculat ion (EGR)Syst em
Three Way Catalytic Converter
294
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......
Taillights, Changing Bulbs in . 238
.
Taking Care of the Unexpected . 255
Technical Descriptions
......
DOT Tire Quality Grading . 288
.....
Emissions Control Systems . 293
.....................
Oxygenated Fuels . 164
Three Way Catalytic
...............................
Converter . 295
.......................
Temperature Gauge . 67 ........
Temperature, Inside Sensor . 119
....................
Temperature, Outside . 66
..............
Tether Anchorage Points . 45
..
Three Way Catalytic Converter . 295
..................
Tilt the Steering Wheel . 74
..........................
Time, Setting the . 154
....................................
Timing Belt . 232
....................................
Tire Chains . 250
.........
Tire, How to Change a Flat . 257
...........................
Tire Inf ormation . 290
...............................................
Tires . 245
......................
Air Pressure . 245, 246
........................................
Chains . 250
.........................
Checking Wear . 247
..........................
Compact Spare . 256
......
DOT Tire Quality Grading . 288
......................................
Inf lation . 245
..................................
Inspection . 247
.....................................
Labeling . 290
...................................
Replacing . 248
......................................
Rotating . 248
...........................................
Snow . 250
....................
Specif ications . 285, 287
...................
Tools, Tire Changing . 257
Towing
.....................................
A Trailer . 194 ................
Emergency Wrecker . 272
....
Equipment and Accessories . 196
.....................
Weight Limit . 194, 195
..
Traction Control System (TCS) . 191
...
TCS Activation Indicator . 60, 192
......................
TCS Indicator . 60, 191
...............
TCS ON/OFF Switch . 192
.............................
Trailer Loading . 194
......................
Trailer Towing Tips . 198
Transmission
Checking Fluid Level, ......................
Automatic . 225, 226
Checking Fluid Level, ...................................
Manual . 228
..................
Fluid Selection . 225, 228
..............
Identif ication Number . 283
.............
Shif ting the Automatic . 183
..................
Shif ting the Manual . 180
.....................................
Treadwear . 288
.......................................
Trip Meter . 66
................................................
Trunk . 82
....................
Emergency Opener . 82
.........................................
Hooks . 176
.................................
Opening the . 82
.............
Open Monitor Indicator . 61
....................................
Turn Signals . 70
Steering Wheel
..................................
Adjustment . 74
.............
Anti-theft Column Lock . 77
...............
Steering Wheel Buttons . 152
Stereo Sound
........................................
System . 120
....................
Storing Your Vehicle . 254
........................................
Sun Visor . 101
........................
Sunglasses Holder . 103
Supplemental Restraint System
......................................
Servicing . 30
.........................
SRS Indicator . 27, 59
...................
System Components . 21
..................................
Synthetic Oil . 218
Index
T
VIII
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