2004 HONDA CIVIC engine

The exhaust emissions controls
include three or f our systems: PGM-
FI, Ignition Timing Control, Exhaust
Gas Recirculation (SOHC VTEC
engine only), and Three Way
Catalytic Converter. These three or
f our 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 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 howmuch 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 ), nitrogen
(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
lowerqualitypartsmayincreasethe
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
203
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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.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.Keep the engine tuned-up.
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.
Parkyourvehicleawayfromhigh
grass, dry leaves, or other f lamma-
bles. 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 vehicle’s three way
catalytic converter.
Have your vehicle diagnosed and
repaired if it is misf iring, back-
f iring, stalling, or otherwise not
running properly.
(DX, LX models)
(EX, Canadian Si models)
Three Way Catalytic Converter
T echnical Inf ormation204
THREE WAY CATALYTIC CONVERTER THREE WAY CATALYTIC CONVERTER
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Make sure the gas tank is nearly,
but not completely, f ull (around
3/4).
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.
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 vehicle has been
parked with the engine of f f or 8
hours or more. Keep the vehicle in Park
(automatic transmission) or
Neutral (manual transmission).
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).
St at e Emissions T est ing
T esting of Readiness Codes
T echnical Inf ormation205
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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 describes the procedures involved in the
replacement of damaged body parts.
This manual complements the Service Manual by
providing in-depth troubleshooting inf ormation f or each
electrical circuit in your vehicle.
Authorized Manuals
Service Manual:
Electrical T roubleshooting Manual:
Body Repair Manual:
212 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.
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CONT INUED
....................................
Accessories . 117
ACCESSORY (Ignition Key
.......................................
Position) . 69
...............
Accessory Power Socket . 85
....................
Additives, Engine Oil . 145
.............................
Airbag (SRS) . 10, 22
...
Airbags, Additional Information . 22
...
Additional Safety Precautions . 28
.............................
Airbag Service . 28
How the Side Airbag Cutof f
......................
Indicator Works . 27
..
How the SRS Indicator Works . 26
How Your Front Airbags
.........................................
Work . 22
...
How Your Side Airbags Work . 25
........................
SRS Components . 22
................
Air Conditioning System . 89
.......................
Air Pressure, Tires . 162
..................
High Speed Driving . 162
.........................
Normal Driving . 162
.......................
Alcohol in Gasoline . 200
......................................
Antif reeze . 147
Anti-lock Brakes (ABS)
...............................
Indicator . 55, 133 ...................................
Operation . 133
..............
Anti-thef t, Audio System . 105
Anti-thef t Steering Column
..............................................
Lock . 69
..................................
Audio System . 92
...
Automatic Seat Belt Tensioners . 20
.............
Automatic Speed Control . 107
..............
Automatic Transmission . 128
..........................
Capacity, Fluid . 196
...............
Checking Fluid Level . 149
.......................................
Shif ting . 128
.
Shif t Lever Position Indicator . 128
................
Shif t Lever Positions . 128
....................
Shif t Lock Release . 130
Battery Charging System ...........................
Indicator . 55, 182
............................
Jump Starting . 178
..............................
Maintenance . 167
............................
Specif ications . 197
..............................
Bef ore Driving . 111
....................................
Belts,Seat .8,19
.............................
Beverage Holder . 85 Brakes
...........
Anti-lock System (ABS) . 133
.............
Break-in, New Linings . 112
....................
Bulb Replacement . 153
...........................................
Fluid . 151
.......................................
Parking . 131
.................
System Indicator . 55, 184
........................
Wear Indicators . 132
.............................
Braking System . 132
.................
Break-in, New Vehicle . 112
..
Brightness Control, Instruments . 64
........................
Brights, Headlights . 63
Bulb Replacement
..........................
Back-up Lights . 157
..............................
Brake Lights . 156
................
Front Parking Lights . 155
........
Front Side Marker Lights . 155
.................................
Headlights . 153
.........
High-mount Brake Light . 158
.........
Rear Side Marker Lights . 156
............................
Specif ications . 197
Bulb Replacement ....................
Turn Signal Lights . 155
..............................
Bulbs, Halogen . 153
Index
A
B
I
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Î
............................
Capacities Chart . 196
.............
Carbon Monoxide Hazard . 46
.............................
Carrying Cargo . 119
Cassette Player
............................................
Care . 104
...................................
Operation . 102
..............
CAUTION, Explanation of . ii
.....................................
CD Changer . 98
.........................................
CD Player . 97
....................................
Ceiling Light . 83
........................
Certif ication Label . 194
............................................
Chains . 166
....................
Changing a Flat Tire . 171
Changing Oil
........................................
How to . 145
......................................
When to . 139
...
Charging System Indicator . 55, 182
............
Checklist, Bef ore Driving . 124
.....................................
Child Saf ety . 29
Child Seats
......
LATCH Anchorage System . 37
...........................
Lower Anchors . 37
..........
Tether Anchorage Points . 41
..................
Childproof Door Locks . 70 .........................
Clock, Setting the . 106
...................................
Clutch Fluid . 151
........................
CO in the Exhaust . 202
............
Cold Weather, Starting in . 125
..............................
Compact Spare . 170
...............
Consumer Inf ormation . 208
.............
Controls, Instruments and . 49
Coolant
........................................
Adding . 147
....................................
Checking . 115
.........................
Proper Solution . 147
...................
Temperature Gauge . 60
Crankcase Emissions Control ........................................
System . 202
............
Cruise Control Operation . 107
..........
Customer Relations Of f ice . 208
................
DANGER, Explanation of . ii
...................................
Dashboard . 2, 50
................
Daytime Running Lights . 63
............
Def ects, Reporting Saf ety . 210
..........................
Def og and Def rost . 91
................
Def ogger, Rear Window . 65
................
Def rosting the Windows . 91 ....................................
Dimensions . 196
...............
Dimming the Headlights . 63
Dipstick
..........
Automatic Transmission . 149
..................................
Engine Oil . 115
..........................
Directional Signals . 63
........
Disc Brake Wear Indicators . 132
.....................
Disposal of Used Oil . 146
Doors
..............
Locking and Unlocking . 70
......................
Power Door Locks . 70
..........
DOT Tire Quality Grading . 198
Downshif ting, 5-speed Manual
.............................
Transmission . 126
...........
Driver and Passenger Safety . 5
...........................................
Driving . 123
....................................
Economy . 116
................
In Foreign Countries . 201
..................
Dust and Pollen Filter . 159
..............................
Economy, Fuel . 116
............
Emergencies on the Road . 169
.............
Battery, Jump Starting . 178
...........
Brake System Indicator . 184
Index
C
D E
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CONT INUED
................
Changing a Flat Tire . 171
.....
Charging System Indicator . 182
..................
Checking the Fuses . 186
.....
Low Oil Pressure Indicator . 182
...
Malf unction Indicator Lamp . 183
...
Manually Closing Moonroof . 185
..................
Overheated Engine . 179
...........................
Emergency Brake . 82
......................
Emergency Flashers . 65
......................
Emergency Towing . 190
............
Emergency Trunk Opener . 71
.......................
Emissions Controls . 202
.............
Emissions Testing, State . 205 Engine
....
Coolant Temperature Gauge . 60
......
Engine Speed Limiter . 127, 130
Malf unction Indicator
................................
Lamp . 56, 183
........
Oil Pressure Indicator . 55, 182
..............
Oil, What Kind to Use . 144
...............................
Overheating . 179
............................
Specif ications . 196
.......................................
Starting . 125
......................
Ethanol in Gasoline . 200
.
Evaporative Emissions Controls . 202
...............................
Exhaust Fumes . 46 Expectant Mothers, Use of Seat
........................................
Belts by . 17
.....................................
Fan, Interior . 89
Features, Comfort and
................................
Convenience . 87
....................
Filling the Fuel Tank . 113
Filters
.........................
Dust and Pollen . 159
...............................................
Oil . 145
5-speed Manual Transmission ...............
Checking Fluid Level . 150
................................
Shif ting the . 126
.............
Flashers, Hazard Warning . 65
...................
Flat Tire, Changing a . 171
Fluids
..........
Automatic Transmission . 149
..........................................
Brake . 151
.........................................
Clutch . 151
..............
Manual Transmission . 150
..........................
Power Steering . 152
..................
Windshield Washer . 148
FM Stereo Radio .....................................
Reception . 95 ...........................
Folding Rear Seat . 76
.....
Foreign Countries, Driving in . 201
..........................
Four-way Flashers . 65
............................
Front Airbags . 10, 22
.................................................
Fuel . 112
......................
Fill Door and Cap . 113
...........................................
Gauge . 59
................
Octane Requirement . 112
...............................
Oxygenated . 200
........................
Reserve Indicator . 56
........................
Tank, Filling the . 113
.....................
Fuses, Checking the . 186
...............
Gas Mileage, Improving . 116
..........................................
Gasohol . 200
.........................................
Gasoline . 112
...............
Fuel Reserve Indicator . 56
...........................................
Gauge . 59
................
Octane Requirement . 112
........................
Tank, Filling the . 113
................
Gas Station Procedures . 113
Index
F
G
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.................
Jacking up the Vehicle . 172
.......................................
Jack, Tire . 171
................................
Jump Starting . 178
..................................................
Keys . 67
Gauges
...
Engine Coolant Temperature . 60
...............................................
Fuel . 59
Gearshif t Lever Positions ..........
Automatic Transmission . 128
5-speed Manual
.........................
Transmission . 127
........................................
Glove Box . 85
.............
Halogen Headlight Bulbs . 153
..............
Hazard Warning Flashers . 65
Headlights
........................................
Aiming . 153
............
Daytime Running Lights . 63
..................
High Beam Indicator . 56
........................
Reminder Beeper . 63
........
Replacing Halogen Bulbs . 153
...................................
Turning on . 63
..............................
Head Restraints . 75
.......................
Heating and Cooling . 88
.............
High Altitude, Starting at . 125
.................
High-Low Beam Switch . 63
..............
High-mount Brake Light . 158
....................................
Hood Latch . 152 .......................
Hood, Opening the . 114
..................................................
Horn . 61
...........................
Hydraulic Clutch . 151
...
Identif ication Number, Vehicle . 194
Ignition
..............................................
Keys . 67
...........................................
Switch . 69
............
Timing Control System . 203
.........
Important Safety Precautions . 6
.........
Indicators, Instrument Panel . 54
...............................
Inf ant Restraint . 34
Inf ant Seats
......
LATCH Anchorage System . 37
...........................
Lower Anchors . 37
..........
Tether Anchorage Points . 41
...................
Inf lation, Proper Tire . 162
..................
High Speed Driving . 162
.........................
Normal Driving . 162
...................................
Inside Mirror . 80
.............................
Inspection, Tire . 163
........................
Instrument Panel . 2, 51
................
Instrument Panel Lights . 54
........
Instrument Panel Brightness . 64 .................................
Interior Lights . 83
........................................
Introduction . i
.......................
Label, Certif ication . 194
.................
Lane Change, Signaling . 63
..................
Lap/Shoulder Belts . 14, 19
...........
LATCH Anchorage System . 37
Lights
....................
Bulb Replacement . 153
.......................................
Indicator . 54
.........................................
Parking . 55
..................................
Turn Signal . 56
.....................................
Load Limit . 120
......
LOCK (Ignition Key Position) . 69
Index
H I
J K L
IV
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