2004 HONDA PILOT engine

If the indicator comes on
while driving, it means one
of the engine’s emission control
systems may have a problem. Even
though you may f eel no dif f erence in
your vehicle’s perf ormance,
continued operation may cause
serious damage.
If you have recently ref ueled your
vehicle, the cause of this indicator
coming on could be a loose or
missing f uel f ill cap. Check the cap
or replace it. Tightening the cap will
not make the indicator turn of f
immediately; it takes at least three
days of normal driving.
If the indicator remains on or the
f uel cap was not loose or missing,
have the vehicle checked by the
dealer as soon as possible. If the malf unction indicator lamp
comes on along with the ‘‘D’’
indicator, there is a problem in the
automatic transmission control
system.
Your vehicle has certain ‘‘readiness
codes’’ that are part of the on-board
diagnostics f or the emissions
systems. In some states, part of the
emissions testing is to make sure
these codes are set. If they are not
set, the test cannot be completed.If your vehicle battery has been
disconnected or gone dead, these
codes are erased. It takes at least
three days of driving under various
conditions to set the codes again.
To check if they are set, turn the
ignition to ON (II), without starting
the engine. The Malf unction
Indicator Lamp will come on f or 20
seconds. If it then goes of f , the
readiness codes are set. If it blinks 5
times, the readiness codes are not
set. If possible, do not take your
vehicle f or a state emissions test
until the readiness codes are set.
Refer to State Emissions Testing for
more information (see page ).
226
Malf unction Indicator L amp
Readiness Code
Malf unction Indicator
T aking Care of t he Unexpect ed207
NOTICE:If you keep driving with the
Malf unction Indicator Lamp on, you
can damage your vehicle’s emission
controls and the engine. Those repairs
may not be covered by your vehicle’s
warranties.

Your vehicle has several identif ying
numbers in various places.
The Vehicle Identif ication Number
(VIN) is the17-digit number your
Honda dealer uses to register your
vehicle f or warranty purposes. It is
also necessary f or licensing and
insuring your vehicle. The easiest
placetofindtheVINisonaplate
fastened to the top of the dashboard.
Youcanseeitbylookingthrough
the windshield on the driver’s side. It
is also on the Certification label at-
tached to the driver’s doorjamb, and
is stamped on the engine com-
partment bulkhead. The VIN is also
provided in bar code on the
Certif ication label.
Identif ication Numbers
T echnical Inf ormation216
VEHICLE IDENTIFICATION NUMBER
CERTIFICATION LABEL

The Engine Number is stamped into
the engine block. It is on the f ront.
The Transmission Number is on a
label on top of the transmission.
Identif ication Numbers
T echnical Inf ormation217
ENGINE NUMBERAUTOMATIC TRANSMISSION NUMBER

µµ ÎÎ
Î
Î
Î Î
Î
Î
Specif ications
T echnical Inf ormation218
Dimensions
Weights
Air Conditionig Capacities
1.74 US gal (6.6
)
2.25 US gal (8.5)
5.1 US qt (4.8
)
4.5 US qt (4.3
)
5.8 US qt (5.5
)
3.2 US qt (3.0)
8.2 US qt (7.8)
0.16 US gal (0.6
) 19.3 US gal (73
)
2.79 US qt (2.64
)
188.0 in (4,775 mm)
76.3 in (1,938 mm)
70.6 in (1,793 mm)
4.8 US qt (4.5
)
66.3 in (1,685 mm)
66.5 in (1,690 mm)
9,700 lbs (4,400 kg)
HFC-134a (R-134a)
24.7 26.5 oz (700 750 g) ND-OIL8
106.3 in (2,700 mm)
Excluding the oil remaining in the engine. Including the coolant in the reserve tank and that remaining in the
engine.
Reserve tank capacity:
The GCWR must be reduced 2 percent for every 1,000 feet (305
meters) of elevation. Equipped with transmission fluid cooler and power steering
fluid cooler.
Length
Width
Height
Wheelbase
Track
See the tire information label atta-
ched to the driver’s doorjamb.
Gross vehicle weight rating
Gross combined weight
rating (GCWR)
Refrigerant type
Charge quantity
Lubricant type Fuel tank
Engine
coolant
Engine oil
Automatic
transmission
fluid
Rear
differential
fluid
Windshield
washer
reservoir
Approx.
Front
Rear
1:
2:Change
Total
Change
Including
filter
Without
filter
Total
Change
Total
Change
1:
2:
2 1
2
1

µ µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
µ
Specif ications
T echnical Inf ormation219
Lights
Battery
Fuses
Engine
Alignment
Tires
60 W/55 W
12 V
60 psi (420 kPa , 4.2 kgf/cm
)
32 psi (220 kPa , 2.2 kgf/cm)
T155/90D16 110M P235/70R16 104S 1°88’
0°50’ 0°50’
0.00 in (0.0 mm)
0.00 in (0.0 mm) 10.0 : 1
211.8 cu-in (3,471 cm
)
3.50 x 3.66 in (89.0 x 93.0 mm)
12 V
12 V
12 V
12 V
12 V
12 V
12 V
12 V
12 V 12 V
12 V
12 V
5W
27 W/8 W
5W
21 W/5 W
21 W/5 W
21 CP (18 W)
5W
18 W
6.2 W
5W
1.1 W
3.8 W
12 V 65 AH/20 HR 14 V 12 V 12.4 W 1.4 W
Headlights
Front side marker lights
Front turn signal lights/
Parking lights
Rear side marker lights
Rear turn signal/hazard lights
Stop/Taillights
Backup lights
License plate lights
High-mount brake light
Individual map lights
Tailgate light
Vanity mirror light
Door (Courtesy) light
Grabrail lights
Console lights
Capacity Interior
Under-hood
Type
BorexStroke
Displacement
Compression ratio
Spark plugs
Water cooled 4-stroke SOHC,
V6 gasoline engine
Toe-in
Camber
Caster
Size
Pressure See page
213or the fuse label
attached to the dashboard.
See page 213or the fuse label
attached to the inside of the fuse
box door under the dashboard.
See page 212or the fuse box
cover.
PZFR5F-11
PKJ16CR-L11
Front/Rear
Spare
Front/Rear
Spare Front
Rear
Front
Rear
Front
Driver’s side
Passenger’s side
(1157 NA)
(168)
(7443)
(7443) (921)
(168)
(921)
(204)
(HB2)
(168)
Front
Rear
Front
Rear
Front NGK:
DENSO:

ÎÎIn Canada, Honda vehicles comply
with the Canadian emission
requirements, as specif ied in an
agreement with Environment
Canada, 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 .
The 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
.
164
Crankcase Emissions Control
System Evaporative Emissions Control
System
Onboard Ref ueling Vapor
Recovery
The Clean Air Act
Emissions Cont rols
T aking Care of t he Unexpect ed223

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 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
operating conditions.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 from
the rest of your vehicle. Read your
warranty manual f or more informa-
tion.
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. 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.
2
2
Exhaust Emissions Controls Replacement Parts
PGM-FI Syst emT hree Way Cat alyt ic Convert er
Ignit ion T iming Cont rol Syst em
Exhaust Gas Recirculat ion (EGR)Syst em
Emissions Cont rols
T echnical Inf ormation224

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.
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.
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.
Have your vehicle diagnosed and
repaired if it is misf iring, back-
f iring, stalling, or otherwise not
running properly.
Three Way Catalytic Converter
T echnical Inf ormation225
THREE WAY CATALYTIC CONVERTER