2004 HONDA PILOT engine

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 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 1/4 of the
scale (approximately 3 minutes).
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 esting of Readiness Codes
St at e Emissions T est ing
T echnical Inf ormation226

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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 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. Body Repair Manual: Electrical T roubleshooting Manual: Service Manual:
Authorized Manuals
234
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.

CONT INUED
BatteryCharging System ...........................
Indicator .48, 206
............................
Jump Starting .202
..............................
Maintenance .193
............................
Specif ications .219
..............................
Bef ore Driving .123
....................................
Belts,Seat .8,16
...........................
Beverage Holders .77
..................................
Booster Seats .39 Brakes
...........
Anti-lock System (ABS) . 145
.............
Break-in, New Linings . 124
...........................................
Fluid .178
....................
Bulb Replacement .182
.........................................
Parking .75
.................
System Indicator . 49,208
........................
Wear Indicators .145
.............................
Braking System .144
.................
Break-in, New Vehicle . 124
..
Brightness Control, Instruments . 59
........................
Brights, Headlights .58
Bulb Replacement ..............................
Brake Lights .182
................
Front Parking Lights . 181
........
Front Side Marker Lights . 183
.................................
Headlights .180
........
High-mount Brake Lights . 182
.................................
Rear Bulbs .182
............................
Specif ications .219
.............
Turn Signal Light . 181,182
..............................
Bulbs, Halogen .180
...
Accessories and Modif ications . 129
ACCESSORY (Ignition Key .......................................
Position) .64
..............
Accessory Power Sockets . 77
....................
Additives, Engine Oil . 172
...............................
Airbag (SRS) .9, 19
.....
Airbags, Additional Infomation . 19
...
Additional Safety Precautions . 24
.............................
Airbag Service .24
How the Side Airbag Of f ......................
Indicator Works .23
..
How the SRS Indicator Works . 23
How Your Front Airbags .........................................
Work .20
...
How Your Side Airbags Work . 22
........................
SRS Components .19
................
Air Conditioning System . 82
.......................
Rear A/C Control .87
.......................
Air Pressure, Tires .188
......................................
Antif reeze .174
Anti-lock Brakes (ABS) ....................
Indicator Light .49, 146
...................................
Operation .145
..............
Anti-thef t, Audio System . 102 .
Anti-thef t Steering Column Lock . 64
..................................
Audio System .88
...
Automatic Seat Belt Tensioners . 18
...
Automatic Lighting Off Feature . 58
.............
Automatic Speed Control . 116
..............
Automatic Transmission . 138
..........................
Capacity, Fluid .218
...............
Checking Fluid Level . 176
.......................................
Shif ting .138
.
Shif t Lever Position Indicator . 138
................
Shif t Lever Positions . 139
....................
Shif t Lock Release . 141
Index
A
B
I

Î
................................
Cancel Button .117
............................
Capacities Chart .218
.............
Carbon Monoxide Hazard . 42
........................
Cargo, .131
Cassette Player ..............................................
Care .95
.....................................
Operation .98
..............
CAUTION, Explanation of . ii
...........................................
CD Care .95
.....................................
CD Changer .94
.........
CD Changer Error Message . 97
.........................................
CD Player .93
.............
CD Player Error Message . 96
........................
Certif ication Label .216
...................................
Chains, .192
....................
Changing a Flat Tire .197
Change Oil ........................................
How to .172
.............................
When to .164, 165
...
Charging System Indicator . 48,206
............
Checklist, Bef ore Driving . 136
..................
Childproof Door Locks . 65
.....................................
Child Saf ety .25
..............................
Booster Seats .39 ...................................
Child Seats .30
.....
Important Saf ety Reminders . 25
..........................................
Inf ants .29
..........................
Larger Children .38
.........................................
LATCH .33
......................
Risks with Airbags .26
.............................
Small Children .30
.........................................
Tethers .37
.........
Where Should a Child Sit? . 26
Child Seats .........................................
LATCH .33
...........................
Lower Anchors .33
..........
Tether Anchorage Points . 37
.................
Climate Control System . 86
.........................
Clock, Setting the .103
..............................................
Clock .103
.....................
Code, Audio System .102
........................
CO in the Exhaust .223
............
Cold Weather, Starting in . 137
.......................
Compact Spare .196
...................
Console Compartment . 77
...............
Consumer Inf ormation . 230
.............
Controls, Instruments and . 45
Coolant ........................................
Adding .174
....................................
Checking .127 .........................
Proper Solution .174
...................
Temperature Gauge . 55
Crankcase Emissions Control ........................................
System .223
................
Cruise Control Indicator . 51
............
Cruise Control Operation . 116
.....................................
Cup Holders .77
....
Customer Service Inf ormation . 230
................
DANGER, Explanation of . ii
...................................
Dashboard .2, 46
................
Daytime Running Lights . 59
Daytime Running Lights .......................................
Indicator .51
.................................
Dead Battery .202
............
Def ects, Reporting Saf ety . 232
................
Def ogger, Rear Window . 60
..........
Def rosting the Windows . 83,85
....................................
Dimensions .218
...............
Dimming the Headlights . 58
Dipstick ..........
Automatic Transmission . 176
..................................
Engine Oil .127
..........................
Directional Signals .58
how to carry
tires tire
Index
C
D
II

.....................................
Fan, Interior .82
Features, Comfort and ................................
Convenience .81
....................
Filling the Fuel Tank . 125
Filters ...............................................
Oil .172
.............
Flashers, Hazard Warning . 59
...................
Flat Tire, Changing a . 197
Fluids ..........
Automatic Transmission . 176
..........................................
Brake .178
..........................
Power Steering .179
..................
Windshield Washer . 175
FM Stereo Radio .....................................
Reception .91
...................
Folding the Third Seat . 71
..........................
Four-way Flashers .59
............................
Front Airbags .10, 19
Front Seat ................................
Adjusting .68, 69
.........................................
Heaters .67
.....................................
Airbags .9, 19
........
Disc Brake Wear Indicators . 145
.....................
Disposal of Used Oil .173
Doors ..............
Locking and Unlocking . 65
....................
Lockout Prevention . 65
......................
Power Door Locks .65
..........
DOT Tire Quality Grading . 220
...........
Driver and Passenger Safety . 5
...........................................
Driving .135
....................................
Economy .128
...................................
DVD Player .104
........
DVD Player Error Message . 112
..............................
Economy, Fuel .128
Emergencies ............................
Jump Starting .202
.......................................
Towing .208
..............
Hazard Warning .59
............
Emergencies on the Road . 195
.............
Battery, Jump Starting . 202
...........
Brake System Indicator . 208
................
Changing a Flat Tire . 197
.....
Charging System Indicator . 206
..................
Checking the Fuses . 210 .....
Low Oil Pressure Indicator . 206
...
Malf unction Indicator Lamp . 207
..................
Overheated Engine . 204
...........................
Emergency Brake .75
......................
Emergency Flashers .59
......................
Emergency Towing .208
.......................
Emissions Controls .223
.............
Emissions Testing, State . 226
Engine ....
Coolant Temperature Gauge . 55
.............................. 137
Malf unction Indicator ................................
Lamp .48, 207
........
Oil Pressure Indicator . 48,206
..............
Oil, What Kind to Use . 171
...............................
Overheating .204
............................
Specif ications .219
............................
Speed Limiter .140
.......................................
Starting .137
.
Evaporative Emissions Controls . 223
...............................
Exhaust Fumes .42
Exhaust Gas Recirculation ........................................
System .224
Expectant Mothers, Use of Seat ........................................
Belts by .15
CONT INUED
Button If it won’t start
Index
E F
III

.................................................
Fuel .124
......................
Fill Door and Cap .125
...........................................
Gauge .54
................
Octane Requirement . 124
........................
Reserve Indicator .51
........................
Tank, Filling the .125
.....................
Fuses, Checking the .210
...............
Gas Mileage, Improving . 128
.........................................
Gasoline .124
...............
Fuel Reserve Indicator . 51
...........................................
Gauge .54
................
Octane Requirement . 124
........................
Tank, Filling the .125
................
Gas Station Procedures . 125
Gauges ...
Engine Coolant Temperature . 55
...............................................
Fuel .54
GAWR (Gross Axle Weight .......................................
Rating) .148
GCWR (Gross Combined Weight .......................................
Rating) .148
............
Gearshif t Lever Positions . 139
........................................
Glove Box .78 GVWR (Gross Vehicle Weight
.......................................
Rating) .148
.............
Halogen Headlight Bulbs . 180
.................
Hazard Warning Button . 59
........................................
Headlights .58
........................................
Aiming .180
..............
Automatic Lighting Off . 58
............
Daytime Running Lights . 59
..................
High Beam Indicator . 51
...........
High Beams, Turning on . 58
............
Low Beams, Turning on . 58
.........................
Reminder Chime .58
........
Replacing Halogen Bulbs . 180
...................................
Turning on .58
...................................
Headphones .113
..............................
Head Restraints .72
.................................
Heated Mirror .74
.....................................
Heater, Seat .67
.......................
Heating and Cooling .82
.............
High Altitude, Starting at . 137
.................
High-Low Beam Switch . 58
..............
High-mount Brake Light . 182HomeLink Universal
................................
Transceiver .118
.......................
Hood, Opening the .126
..................................................
Horn .56
...
Identif ication Number, Vehicle . 216
Ignition ..............................................
Keys .62
...........................................
Switch .64
............
Timing Control System . 224
........................
Immobilizer System .62
.........
Important Safety Precautions . 6
Indicators .......................
A/T Temperature .52
...............
ABS (Anti-lock Brake) . 49
Brake (Parking and Brake ....................................
System) .49
.................................
Brake Lamp .50
........................
Charging System .48
.............................
Cruise Control .51
DRL (Daytime Running ......................................
Lights) .51
...................................
High Beam .51
........
Key (Immobilizer System) . 49
Index
G H
I
IV

...
Octane Requirement, Gasoline . 124
.........................................
Odometer .54
...............................
Odometer, Trip .54
....................
Of f -Highway Driving . 155
...................
Of f -Road Precautions . 155
Oil ........................
Change, How to .172
..............
Change, When to . 164,165
......................
Checking Engine .127
..............
Pressure Indicator . 48,206
Selecting Proper Viscosity ......................................
Chart .171
...........
ON (Ignition Key Position) . 64
Onboard Ref ueling Vapor ................................
Recovery .223
..............................
Outside Mirrors .74
....................
Overheating, Engine .204
....
Owner’s Maintenance Checks . 163 ...................
Radiator Overheating . 204
Radio/CD Sound ..........................................
System .88
..........................
Readiness Codes .226
.................................
Rear A/C Unit .87
............
Rear Audio Control Panel . 107
........
Rear Entertainment System . 104
..
Rear Lights, Bulb Replacement . 182
............................
Rear View Mirror .74
.................
Rear Window Def ogger . 60
.
Rear Window Wiper and Washer . 57
.........
Reclining the Seat Backs . 68,69
...........
Reclining the Second Seats . 70
................
Reclining the Third Seat . 71
.............................
Reminder Lights .47
................
Remote Audio Controls . 101
.................
Remote Control (RES) . 109
.......................
Remote Transmitter .66
Replacement Inf ormation ..............
Dust and Pollen Filter . 185
................
Engine Oil and Filter . 172
.................................
Floor Mats .185
..........................................
Fuses .210
................................
Light Bulbs .180
..............
Panel Brightness Control . 59
........................
Park Gear Position .139 ...........................................
Parking .143
.................................
Parking Brake .75
Parking Brake and Brake System ...............................
Indicator .49, 208
.................................
Parking Lights .58
..
Parking Over Things that Burn . 225
............................
Playing the Radio .88
....................................
Playing a CD .93
....................
Playing a CD Changer . 94
.................................
Playing a Tape .98
.............................
PGM-FI System .224
..........................
Power Door Locks .65
................
Power Seat Adjustments . 68
.................
Power Socket Locations . 76
..............................
Power Windows .73
.........
Pregnancy, Using Seat Belts . 15
.........
Protecting Adults and Teens . 10
...
Additional Safety Precautions . 16
.....
Advice f or Pregnant Women . 15
........................
Protecting Children .25
.....................
General Guidelines .25
...........................
Protecting Inf ants .29
...........
Protecting Larger Children . 38
.............
Protecting Small Children . 30
Index
O
P R
VI

ÎÎ
.............................
Schedule .164-166
...................................
Seat Belts .184
................................
Timing Belt .177
...........................................
Tires .191
.............................
Wiper Blades .186
Replacing Seat Belts Af ter a ............................................
Crash .19
...
Reserve Tank, Engine Coolant . 127
...............................
Restraint, Child .25
..................
Reverse Gear Position . 139
......................................
Roof Rack .131
................................
Rotation, Tire .190
..................................
Saf ety Belts .8, 16
.........
Safety Defects, Reporting . 232
.................................
Saf ety Features .7
...........................................
Airbags .9
.......................................
Seat Belts .8
.............
Saf ety Labels, Location of . 43
...............................
Saf ety Messages .ii
.....................................
Seat Belts .8, 16
...............
Additional Information . 16
Automatic Seat Belt ...............................
Tensioners .18 .....................................
Cleaning .185
......................
Lap/Shoulder Belt .17
................................
Maintenance .18
Reminder Light and ................................
Beeper .16, 48
...................
System Components . 16
...............
Use During Pregnancy . 15
...
Wearing a Lap/Shoulder Belt . 12
....................................
Seat Heaters .67
.................................................
Seats .68
............
Folding the Second Seat . 70
...............
Folding the Third Seat . 71
..........................
Head Restraints .72
.........
Reclining the Second Seat . 70
............
Reclining the Third Seat . 71
.......................
Third Seat Access .70
............
Seats, Adjusting the . 10,68,69
............................
Security System .115
...............................
Serial Number .216
...........................
Service Intervals .161
...........................
Service Manual .233
.........
Service Station Procedures . 125
..........................
Setting the Clock .103
Shif ting the Automatic .............................
Transmission .138
.....
Shif t Lever Position Indicator . 138........................
Shif t Lock Release .141
Side Marker Lights, Bulb .........................
Replacement in .183
................................
Side Airbags .9 ,22
....................
Cutof f Indicator .23, 48
...............................
Signaling Turns .58
.....................................
Snow Tires .191
..................................
Sound System .88
Spare Tire ......................................
Inf lating .196
............................
Specif ications .219
....................
Specif ications Charts . 218
................................
Speed Control .116
..........
SRS, Additional Inf ormation . 19
...
Additional Safety Precautions . 24
.............................
Airbag Service .24
How the Side Airbag Of f ......................
Indicator Works .23
..
How the SRS Indicator Works . 23
How Your Front Airbags .........................................
Work .20
...
How Your Side Airbags Work . 22
........................
SRS Components .19
.............................
SRS Indicator .23 ,48
CONT INUED
Index
S
VII