engine HONDA PILOT 2003 1.G Owners Manual

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 emissions control systems are
covered by warranties separate from
the rest of your vehicle. Read your
warranty manual f or more informa-
tion.
The PGM-FI System uses sequential
multiport f uel injection.
It has three subsystems: Air Intake,
Engine Control, and Fuel Control.
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
genuine Honda replacement parts or
their equivalent f or repairs. Using
lowerqualitypartsmayincreasethe
emissions f rom your vehicle.
2
2
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
T echnical Inf ormation
Emissions Cont rols
369

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.Keep the engine tuned-up.
Have your vehicle diagnosed and
repaired if it is misf iring, back-
f iring, stalling, or otherwise not
running properly.
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.
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. 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.
Three Way Catalytic Converter
T echnical Inf ormation370
THREE WAY CATALYTIC CONVERTER

Make sure the gas tank is nearly,
but not completely, f ull (around
3/4).
Make sure the vehicle has been
parked with the engine of f f or 8
hours or more.
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.Keep the vehicle in Park.
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).
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. Select a nearby lightly traveled
major highway where you can
maintain a speed of 50 to 60 mph
(80to97km/h)foratleast20
minutes. Drive on the highway in
D. Do not use the cruise control.
When traffic allows, drive for 90
seconds without moving the
accelerator pedal. (Vehicle speed
may vary slightly; this is okay.) If
you cannot do this f or a
continuous 90 seconds because of
traf f ic conditions, drive f or at least
30 seconds, then repeat it two
more times (for a total of 90
seconds).
T echnical Inf ormation
T esting of Readiness Codes
St at e Emissions T est ing
371

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) This manual complements the Service Manual by
providing in-depth troubleshooting inf ormation f or each
electrical circuit in your vehicle.
This manual describes the procedures involved in the
replacement of damaged body parts. 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. Service Manual:
Electrical T roubleshooting Manual:
Body Repair Manual:
Authorized Manuals
378
NOTE: Dealers and Companies please provide dealer or company name,
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below for a quotation.
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Apartment Number
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City
Daytime Telephone Number
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Do not send cash
Master
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Check here if your billing address is different
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()
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days of delivery. On returns, a restocking fee may be applied against the original order.

CONT INUED
...
Accessories and Modif ications . 223
................................
Accessories .223
...
Additional Safety Precaution . 224
............................
Modif ications .224
ACCESSORY (Ignition Key .......................................
Position) .82
............
Accessory Power Sockets . 110
....................
Additives, Engine Oil . 284
...............................
Airbag (SRS) .9, 50
.....................
Air Cleaner Element .297
......
Air Conditioning System . 118,130
..............................
Maintenance .306
.....................
Rear A/C Control .135
.................................
Usage .118, 130
...............
Air Outlets (Vents) . 120,128
.......................
Air Pressure, Tires .308
.......................
Alcohol in Gasoline .366
.......
Aluminum Wheels, Cleaning . 327
......................................
Antif reeze .287
Anti-lock Brakes (ABS) ....................
Indicator Light .63, 243
...................................
Operation .242
..............
Anti-thef t, Audio System . 153
.
Anti-thef t Steering Column Lock . 81..........................
Appearance Care .325
................
Audio System . 137,153,168
...
Automatic Seat Belt Tensioners . 48
...
Automatic Lighting Off Feature . 73
.............
Automatic Speed Control . 207
..............
Automatic Transmission . 233
..........................
Capacity, Fluid .362
...............
Checking Fluid Level . 293
.......................................
Shif ting .234
.
Shif t Lever Position Indicator . 233
................
Shif t Lever Positions . 234
....................
Shif t Lock Release . 236
Battery Charging System ...........................
Indicator .62, 348
............................
Jump Starting .343
..............................
Maintenance .302
............................
Specif ications .363
..............................
Bef ore Driving .215
....................................
Belts,Seat .8,46
.........................
Beverage Holders .105
.................................
Body Repairs .332 Brakes
...........
Anti-lock System (ABS) . 242
.............
Break-in, New Linings . 216
...........................................
Fluid .295
....................
Bulb Replacement .320
.......................................
Parking .104
.................
System Indicator . 63,351
........................
Wear Indicators .241
.............................
Braking System .241
.................
Break-in, New Vehicle . 216
..
Brightness Control, Instruments . 73
........................
Brights, Headlights .72
Bulb Replacement ..........................
Back-up Lights .321
..............................
Brake Lights .320
......................
Cargo Area Light .323
................
Front Parking Lights . 318
........
Front Side Marker Lights . 319
.................................
Headlights .317
..............
Individual Map Lights . 322
...................
License Plate Light . 321
.................................
Rear Bulbs .320
............................
Specif ications .363
............
Turn Signal Lights . 318,320
..............................
Bulbs, Halogen .317
Index
A
B
I

Î
................................
Cancel Button .209
............................
Capacities Chart .362
.............
Carbon Monoxide Hazard . 56
.............................
Carrying Cargo .225
Cassette Player ............................................
Care .181
...................
Operation . 149,160,178
..............
CAUTION, Explanation of . ii
..................
CD Changer . 145,165,184
......................
CD Player .143, 163,182
........................
Certif ication Label .360
............................................
Chains .315
Change Oil ........................................
How to .285
.............................
When to .274, 276
....................
Changing a Flat Tire .335
............
Changing Engine Coolant . 289
...
Charging System Indicator . 62,348
............
Checklist, Bef ore Driving . 231
..................
Childproof Door Locks . 87
.....................................
Child Saf ety .21
.......................................
Child Seats .21
..........
Tether Anchorage Points . 42
....................
Cleaner Element, Air . 297Cleaning
....................
Aluminum Wheels .327
...................................
Carpeting .328
......................................
Exterior .326
.........................................
Fabric .329
.......................................
Interior .328
.......................................
Leather .329
...................................
Seat Belts .329
...........................................
Vinyl .329
....................................
Windows .330
...............
Climate Control System . 128
......................................
Coat Hook .111
.....................
Code, Audio System .189
........................
CO in the Exhaust .368
........................................
Coin Box .111
............
Cold Weather, Starting in . 232
..............................
Compact Spare .334
...............
Consumer Inf ormation . 374
.............
Controls, Instruments and . 59
Coolant ........................................
Adding .287
....................................
Checking .221
.........................
Proper Solution .287
...................................
Replacing .289
...................
Temperature Gauge . 68
....................
Corrosion Protection .331 Crankcase Emissions Control
........................................
System .368
............
Cruise Control Operation . 207
Customer Relations ................................
Inf ormation .374
................
DANGER, Explanation of . ii
...................................
Dashboard .2, 60
................
Daytime Running Lights . 73
............
Def ects, Reporting Saf ety . 376
................
Def ogger, Rear Window . 77
......
Def rosting the Windows . 125,133
....................................
Dimensions .362
...............
Dimming the Headlights . 72
Dipstick ..........
Automatic Transmission . 293
..................................
Engine Oil .220
..........................
Directional Signals .74
........
Disc Brake Wear Indicators . 241
.....................
Disposal of Used Oil .286
Doors ..............
Locking and Unlocking . 82
....................
Lockout Prevention . 83
......................
Power Door Locks .82
Index
C
D
II

CONT INUED
..........
DOT Tire Quality Grading . 364
.....................................
Drive Belts .307
...........
Driver and Passenger Safety . 5
...........................................
Driving .229
....................................
Economy .222
.........................
In Bad Weather .245
................
In Foreign Countries . 367
..................
Dust and Pollen Filter . 307
...................................
DVD Player .190
..............................
Economy, Fuel .222
............
Emergencies on the Road . 333
.............
Battery, Jump Starting . 343
...........
Brake System Indicator . 351
................
Changing a Flat Tire . 335
.....
Charging System Indicator . 348
..................
Checking the Fuses . 353
.....
Low Oil Pressure Indicator . 347
...
Malf unction Indicator Lamp . 349
..................
Overheated Engine . 345
.........................
Emergency Brake .104
......................
Emergency Flashers .76
......................
Emergency Towing .358
.......................
Emissions Controls .368 Engine
....
Coolant Temperature Gauge . 68
.................................
Drive Belts .307
Malf unction Indicator ................................
Lamp .62, 349
........
Oil Pressure Indicator . 62,347
..............
Oil, What Kind to Use . 283
...............................
Overheating .345
............................
Specif ications .363
............................
Speed Limiter .236
.......................................
Starting .232
......................
Ethanol in Gasoline .366
.
Evaporative Emissions Controls . 368
...............................
Exhaust Fumes .56
Exhaust Gas Recirculation ........................................
System .369
Expectant Mothers, Use of Seat ........................................
Belts by .19
..................
Exterior, Cleaning the . 326
............................
Fabric, Cleaning .329
..........................
Fan, Interior .118, 131
Features, Comfort and ..............................
Convenience .117 ....................
Filling the Fuel Tank . 217
Filters ...............................................
Air .297
.......................
Air Conditioning .306
...............................................
Oil .285
.............
Flashers, Hazard Warning . 76
...................
Flat Tire, Changing a . 335
Fluids ..........
Automatic Transmission . 293
..........................................
Brake .295
..........................
Power Steering .296
..................
Windshield Washer . 292
FM Stereo Radio ...................................
Reception .176
...................
Folding the Third Seat . 95
.....
Foreign Countries, Driving in . 367
..........................
Four-way Flashers .76
.................................................
Fuel .216
......................
Fill Door and Cap .217
...........................................
Gauge .68
................
Octane Requirement . 216
...............................
Oxygenated .366
........................
Reserve Indicator .65
........................
Tank, Filling the .217
.....................
Fuses, Checking the .353
Index
E
F
III

...............
Gas Mileage, Improving . 222
..........................................
Gasohol .366
.........................................
Gasoline .216
...............
Fuel Reserve Indicator . 65
...........................................
Gauge .68
................
Octane Requirement . 216
........................
Tank, Filling the .217
................
Gas Station Procedures . 217
Gauges ...
Engine Coolant Temperature . 68
...............................................
Fuel .68
...............................
Speedometer .67
.................................
Tachometer .67
GAWR (Gross Axle Weight .......................................
Rating) .248
GCWR (Gross Combined Weight .......................................
Rating) .248
............
Gearshif t Lever Positions . 234
..............................
Glass Cleaning .330
........................................
Glove Box .88
GVWR (Gross Vehicle Weight .......................................
Rating) .248 .............
Halogen Headlight Bulbs . 317
..............
Hazard Warning Flashers . 76
........................................
Headlights .72
........................................
Aiming .317
..............
Automatic Lighting Off . 73
............
Daytime Running Lights . 73
..................
High Beam Indicator . 65
...........
High Beams, Turning on . 72
............
Low Beams, Turning on . 72
.........................
Reminder Chime .72
........
Replacing Halogen Bulbs . 317
...................................
Turning on .72
..............................
Head Restraints .93
...............................
Heated Mirror .104
.....................
Heating and Cooling .118
.............
High Altitude, Starting at . 232
.................
High-Low Beam Switch . 72
HomeLink Universal ...............................
Transmitter .210
....................................
Hood Latch .298
.......................
Hood, Opening the .218
..................................................
Horn .71
.................................
Hydroplaning .246 ...
Identif ication Number, Vehicle . 360
Ignition ..............................................
Keys .79
...........................................
Switch .81
............
Timing Control System . 369
........................
Immobilizer System .80
.........
Important Safety Precautions . 6
.........
Indicators, Instrument Panel . 61
..................
Individual Map Lights . 114
.........................
Inf ant Restraint .26, 30
................................
Inf ant Seats .26, 30
...................
Inf lation, Proper Tire . 308
.................................
Inside Mirror .102
.............................
Inspection, Tire .310
........................
Instrument Panel .2 ,60
........
Instrument Panel Brightness . 73
...........................
Interior Cleaning .328
...............................
Interior Lights .112
........................................
Introduction .i
.................
Jacking up the Vehicle . 338
.......................................
Jack, Tire .335
Index
GHI
J
IV

CONT INUED
..................................................
Keys .79
..................................
Maintenance .269
...
Owner Maintenance Checks . 281
.................................
Record .279-280
......................
Required Indicator .69
..........................................
Saf ety .270
.............................
Schedule .274-276
.
Malf unction Indicator Lamp . 62,349
..............
Manual Seat Adjustments . 91
...............................
Meters, Gauges .67
...................
Methanol in Gasoline . 366
........................
Mirrors, Adjusting .103
...................
Neutral Gear Position . 235
..................
New Vehicle Break-in . 216
...................
NOTICE, Explanation of . i
...............
Numbers, Identif ication . 360..............................
Paint Touch-up .327
..............
Panel Brightness Control . 73
........................
Park Gear Position .234
................................
Jump Starting .343
.......................
Label, Certif ication .360
.................
Lane Change, Signaling . 74
..................
Lap/Shoulder Belts . 15,46
....................
Light Control Switch .112
.............................................
Lights .315
....................
Bulb Replacement .317
.......................................
Indicator .61
.......................................
Interior .112
.........................................
Parking .72
..................................
Turn Signal .74
....................................
Load Limits .226
......
LOCK (Ignition Key Position) . 81
Locks .......
Anti-thef t Steering Column . 81
............................
Fuel Fill Door .217
....................................
Glove Box .88
....................
Lockout Prevention . 83
.................................
Power Door .82 ........................
Low Coolant Level .221
.........................
Low Fuel Indicator .65
...
Low Oil Pressure Indicator . 62,347
...
Lubricant Specif ications Chart . 362
.........................................
Luggage .225 ...
Octane Requirement, Gasoline . 216
.........................................
Odometer .67
...............................
Odometer, Trip .67
Oil ........................
Change, How to .285
..............
Change, When to . 274,276
......................
Checking Engine .220
..............
Pressure Indicator . 62,347
Selecting Proper Viscosity ......................................
Chart .284
...........
ON (Ignition Key Position) . 82
..
Operation in Foreign Countries . 367
............................
Outside Mirrors .102
....................
Overheating, Engine .345
.......
Owner Maintenance Checks . 281
.........................
Oxygenated Fuels .366
Index
L K
N MO
P
V

Î
...........................................
Parking .240
...............................
Parking Brake .104
.................................
Parking Lights .72
..
Parking Over Things that Burn . 370
.............................
PGM-FI System .369
..................
Polishing and Waxing . 327
................
Power Seat Adjustments . 89
............
Pre-Drive Saf ety Checklist . 11
.........
Pregnancy, Using Seat Belts . 19
............................
Protecting Adults .12
...
Additional Safety Precautions . 19
.....
Advice f or Pregnant Women . 19
........................
Protecting Children .21
.......................
Protecting Inf ants .30
.......
Protecting Larger Children . 38
.........
Protecting Small Children . 35
Using Child Seats with .....................................
Tethers .42
.............................
Using LATCH .44 ..................................
Saf ety Belts .8, 46
.........
Safety Defects, Reporting . 376
.................................
Saf ety Features .7
..........................................
Air bags .9
..................................
Door Locks .10
..........................
Head Restraints .10
.......................................
Seat Belts .8
.....................
Seats & Seat-Backs .10
.............
Saf ety Labels, Location of . 57
...............................
Saf ety Messages .ii
.....................................
Seat Belts .8, 46
...............
Additional Information . 46
Automatic Seat Belt ...............................
Tensioners .48
.....................................
Cleaning .329
......................
Lap/Shoulder Belt .46
................................
Maintenance .49
Reminder Light and ................................
Beeper .46, 62
...................
System Components . 46
...............
Use During Pregnancy . 19
...
Wearing a Lap/Shoulder Belt . 15
...................
Radiator Overheating . 345
Radio/CD Sound .......................
System .137, 153,168
...............................
Rear A/C Unit .135 ........
Rear Entertainment System . 190
..
Rear Lights, Bulb Replacement . 320
..........................
Rear View Mirror .102
.................
Rear Window Def ogger . 77
.
Rear Window Wiper and Washer . 76
.........
Reclining the Seat Backs . 90,91
...........
Reclining the Second Seats . 92
................
Reclining the Third Seat . 92
.............................
Reminder Lights .61
................
Remote Audio Controls . 188
.......................
Remote Transmitter .84
Replacement Inf ormation .................
Air Cleaner Element . 297
.......................................
Coolant .289
................
Engine Oil and Filter . 285
..........................................
Fuses .353
................................
Light Bulbs .317
............................
Schedule .274, 276
................................
Spark Plugs .299
................................
Timing Belt .308
...........................................
Tires .312
.............................
Wiper Blades .304
Replacing Seat Belts Af ter a ............................................
Crash .49
...
Reserve Tank, Engine Coolant . 221
..................
Reverse Gear Position . 235................................
Rotation, Tire .311
Index
S
R
VI