2003 HONDA PILOT check engine

If the temperature gauge stays at
the red mark, turn of f the engine.
Wait until you see no more signs
of steam or spray, then open the
hood.
If you don’t f ind an obvious leak,
check the coolant level in the
radiator reserve tank (see page). If the level is below the
MIN mark, add coolant to halfway
between the MIN and MAX marks.
If there was no coolant in the
reserve tank, you may also have to
add coolant to the radiator. Let the
engine cool down until the pointer reaches the middle of the tempera-
ture gauge, or lower, bef ore check-
ing the radiator.
Using gloves or a large heavy
cloth, turn the radiator cap
counterclockwise, without pushing
down, to the f irst stop. This
releases any remaining pressure in
the cooling system. After the
pressure releases, push down on
the cap and turn it until it comes
off.
Look f or any obvious coolant leaks,
such as a split radiator hose.
Everything is still extremely hot,
so use caution. If you f ind a leak, it
must be repaired bef ore you
continue driving (see
on page ). Start the engine and set the
temperature control dial to
maximum (climate control to
FULL AUTO at 90°F/32°C). Add
coolant to the radiator up to the
base of the f iller neck. If you do
not have the proper coolant
mixture available, you can add
plain water. Remember to have
the cooling system drained and
ref illed with the proper mixture as
soon as you can.
If the temperature stays normal,
check the coolant level in the
radiator reserve tank. If it has
gone down, add coolant to the
MAX mark. Put the cap back on
tightly. Put the radiator cap back on
tightly. Run the engine and watch
the temperature gauge. If it goes
back to the red mark, the engine
needs repair. (See
on page .)
4.
5.
6.
7.
8. 9.10.
11.
12.
358
221 358
T aking Care of t he Unexpect ed
If Your Engine Overheats
Emergency
Towing
Emergency
Towing
346
Removing the radiator cap
while the engine is hot can
cause the coolant to spray out,
seriously scalding you.
Always let the engine and
radiator cool down before
removing the radiator cap.

This indicator should light when the
ignition switch is ON (II), and go out
af ter the engine starts. It should
never come on when the engine is
running. If it starts f lashing, it
indicates that the oil pressure
dropped very low f or a moment, then
recovered. If the indicator stays on
with the engine running, it shows
that the engine has lost oil pressure
and serious engine damage is
possible. In either case, you should
take immediate action.Saf ely pull of f the road and shut
of f the engine. Turn on the hazard
warning indicators.
If necessary, add oil to bring the
level back to the full mark on the
dipstick (see page ). Let the vehicle sit f or a minute.
Open the hood and check the oil
level (see page ). Although oil
levelandoilpressurearenot
directly connected, an engine that
is very low on oil can lose pressure
during cornering and other driving
maneuvers.Start the engine and watch the oil
pressure indicator. If the light
does not go out within ten seconds,
turn of f the engine. There is a
mechanical problem that needs to
be repaired bef ore you can
continue driving. (See
on page .)
1.
2.
3. 4.
220 283 358
L ow Oil Pressure Indicator
T aking Care of t he Unexpect ed
Emergency
Towing
347
LOW OIL PRESSURE INDICATOR
Running the engine with low oil
pressure can cause serious mechanical
damage almost immediately. Turn of f
the engine as soon as you can saf ely get
the vehicle stopped.

If the indicator remains on past three
driving trips, or the f uel cap was not
loose or missing, have the vehicle
checked by the dealer as soon as
possible. Drive moderately until the
dealer has inspected the problem.
Avoid full-throttle acceleration and
driving at high speed.
Youshouldalsohavethedealer
inspect your vehicle if this indicator
comes on repeatedly, even though it
may turn of f as you continue driving.
This indicator comes on when you
turn the ignition switch ON (II), and
goes of f af ter the engine starts. If it
comes on at any other time, it
indicates one of the engine’s
emissions control systems may have
a problem. Even though you may
f eel no dif f erence in your vehicle’s
perf ormance, it can reduce your f uel
economy and cause your vehicle to
put out excessive emissions.
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
and tighten it until it clicks several
times. Replace the f uel f ill cap if it is
missing. Tightening the cap will not
make the indicator turn of f
immediately; it takes at least three
driving trips.
This indicator may also come on
along with the ‘‘D’’ indicator.
Malf unction Indicator L amp
T aking Care of t he Unexpect ed349
MALFUNCTION INDICATOR LAMP
If you keep driving with the
malf unction indicator lamp on, you can
damage your vehicle’s emissions
controls and engine. Those repairs may
not be covered by your vehicle’s
warranties.

If possible, do not take your vehicle
f or a state emissions test until the
readiness codes are set. To check if
they are set, turn the ignition ON (II),
but do not start 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. Ref er to State
Emissions Testing f or more
inf ormation.(See page .)
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’s battery has been
disconnected or gone dead, these
codes are erased. It takes several
days of driving under various
conditions to set the codes again.
371
T aking Care of t he Unexpect ed
Malf unction Indicator L amp
Readiness Codes
350

However, if the brake pedal does not
f eel normal, you should take
immediate action. Because of the
brake system’s dual-circuit design, a
problem in one part of the system
will still give you braking at two
wheels. You will f eel the brake pedal
go down much f arther bef ore the
vehicle begins to slow down, and you
will have to press harder on the
pedal. The distance needed to stop
will be much longer. If it comes on at any other time, it
indicates a problem with the vehicle’s
brake system. In most cases, the
problem is a low f luid level in the
brake f luid reservoir. Press lightly on
the brake pedal to see if it f eels
normal. If it does, check the brake
f luid level the next time you stop at a
service station (see page ). If the
f luid level is low, take the vehicle to
your dealer and have the brake
system inspected f or leaks or worn
brake pads.Slow down by shif ting to a lower
gear, and pull to the side of the road
when it is saf e. Because of the
longer distance needed to stop, it is
hazardous to drive the vehicle. You
should have it towed, and repaired as
soon as possible. (See
on page .)
If you must drive the vehicle a short
distance in this condition, drive
slowly and cautiously.
The Brake System Indicator comes
on when you turn the ignition ON
(II). If the parking brake is not set, it
goes of f af ter you start the engine. If
the parking brake is set, it goes of f
when you f ully release the parking
brake with the engine running. 295
358Emergency
Towing
Brake System Indicator
T aking Care of t he Unexpect ed351
BRAKE SYSTEM INDICATOR
U. S. indicator shown

If something electrical in your
vehicle stops working, the first thing
youshouldcheckforisablownfuse.
Determine f rom the chart on pagesand , or the diagram on the
f use box lid (the diagram f or the
driver’s side interior f use box is on
the kick panel below the f use box),
which f use or f uses control that
component. Check those f uses f irst,
but check all the f uses bef ore
deciding that a blown f use is not the
cause. Replace any blown f uses and
check the component’s operation.
Turn the ignition switch to LOCK
(0). Make sure the headlights and
all other accessories are off.
Remove the cover f rom the f use
box.
The secondary f use box is in the
engine compartment next to the
battery.
The primary under-hood f use box is
locatedonthepassenger’ssideof
the engine compartment. To open it,
pushthetabsasshown.
1.
2.356 357
CONT INUED
Checking and Replacing Fuses
Fuses
T aking Care of t he Unexpect ed353
UNDER-HOOD
UNDER-HOOD

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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
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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