ignition TOYOTA SEQUOIA 2003 1.G Repair Manual

03_SEQUOIA_U (L/O 0301)
299
2003 SEQUOIA from Jan. ’03 Prod. (OM34422U)
Before starting the engine, be sure to fol-
low the instructions in “(a) Before crank-
ing”.
Normal starting procedure
The multiport fuel injection system/sequen-
tial multiport fuel injection system in your
engine automatically controls the proper
airfuel mixture for starting. You can start
a cold or hot engine as follows:1. With your foot off the accelerator ped- al, turn the ignition key to “START”
position, then release it.
2. After the engine runs for about 10 se- conds, you are ready to drive.
If the weather is below freezing, let the
engine warm up for a few minutes before
driving.
If the engine stalls...
Simply restart it, using the correct proce-
dure given in normal starting.
If the engine will not start...
See “If your vehicle will not start” on page
316 in Section 4.NOTICE
 Do not race a cold engine.
 If the engine becomes difficult to
start or stalls frequently, have the
engine checked immediately.
Always slow down in gusty crosswinds.
This will allow you much better control.
Drive slowly onto curbs and, if pos-
sible, at a right angle. Avoid driving
onto high, sharpedged objects and
other road hazards. Failure to do so
can lead to severe tire damage such
as a tire burst.
Drive slowly when passing over bumps
or travelling on a bumpy r oad. Other-
wise, the impact could cause severe
damage to the tires and/or wheels.
When parking on a hill, turn the front
wheels until they touch the curb so
that the vehicle will not roll. Apply the
parking brake, and place the transmis-
sion in “P”. If necessary, block the
wheels.
Washing your vehicle or driving through
deep water may get the brakes wet. To
see whether they are wet, check that
there is no traffic near you, and then
press the pedal lightly. If you do not
feel a normal braking force, the brakes
are probably wet. To dry them, drive
the vehicle cautiously while lightly
pressing the brake pedal with the park-
ing brake applied. If they still do not
work safely, pull to the side of the road
and call a Toyota dealer for assistance.
(b) Starting the engine Tips for driving in various
conditions

03_SEQUOIA_U (L/O 0301)
316
2003 SEQUOIA from Jan. ’03 Prod. (OM34422U)
Before making these checks, make sure
you have followed the correct starting
procedure given in “How to start the
engine” on page 298 in Section 3 and that
you have sufficient fuel. Also check
whether the other keys will start the
engine. If they work, your key may be
broken. Have the key checked at your
Toyota dealer. If none of your keys work,
the system is possibly broken. Call your
Toyota dealer. (See “Keys” on page 10 in
Section 12.)
If the engine is not turning over or is
turning over too slowly—1. Check that the battery terminals are tight and clean.
2. If the battery terminals are O.K., switch on the interior light.
3. If the light is out, dim or goes out when the starter is cranked, the battery
is discharged. You may try jump start-
ing. See “(c) Jump starting” for further
instructions.
If the light is O.K., but the engine still will
not start, it needs adjustment or repair.
Call a Toyota dealer or qualified repair
shop.NOTICE
Do not pull or pushstart the ve-
hicle. It may damage the vehicle or
cause a collision when the engine
starts. Also the threeway catalytic
converter may overheat and become a
fire hazard.
If the engine turns over at its normal
speed but will not start—
1. Turn the ignition key to “ACC” or “LOCK” and try starting the engine
again.
2. If the engine will not start, the engine may be flooded because of repeated
cranking. See “(b) Starting a flooded
engine” for further instructions.
3. If the engine still will not start, it needs adjustment or repair. Call a Toyota
dealer or qualified repair shop. If the engine will not start, your engine
may be flooded because of repeated
cranking.
If this happens, turn the ignition key to
“START” with the accelerator pedal held
down, and hold the key at this position for
about 30 seconds. Then the cranking hold
function stops cranking automatically, and
you can try starting the engine with your
foot off the accelerator pedal.
If the engine does not start, wait a few
minutes and try again.
If the engine still will not start, it needs
adjustment or repair. Call a Toyota dealer
or qualified repair shop for assistance.
If your vehicle will not start—
(a) Simple checks
(b) Starting a flooded engine

03_SEQUOIA_U (L/O 0301)
319
2003 SEQUOIA from Jan. ’03 Prod. (OM34422U)
5. Start your engine in the normal way.After starting, run it at about 2000 rpm
for several minutes with the accelerator
pedal lightly depressed.
6. Carefully disconnect the cables in the exact reverse order: the negative cable
and then the positive cable.
7. Carefully dispose of the battery cover cloths—they may now contain sulfuric
acid.
8. If removed, replace all the battery vent plugs.
If the cause of your battery discharging is
not apparent (for example, lights left on),
you should have it checked at your Toyota
dealer. If your engine stalls while driving...
1. Reduce your speed gradually, keeping a straight line. Move cautiously off the
road to a safe place.
2. Turn on your emergency flashers.
3. Turn the ignition key to “ACC” or “LOCK”, and try starting the engine
again.
If the engine will not start, see “If your
vehicle will not start” on page 316 in this
section.
CAUTION
If the engine is not running, the pow-
er assist for the brakes and steering
will not work so steering and braking
will be much harder than usual.
If the engine speed does not increase with
the accelerator pedal depressed down, there
may be a problem somewhere in your elec-
tronic throttle control system.
At this time, vibration may occur. Howev-
er, if you depress the accelerator pedal
more firmly and slowly, you can drive your
vehicle at low speeds. Have your vehicle
checked by your Toyota dealer as soon as
possible.
Even if the abnormality of the electronic
throttle control system is corrected during
low speed driving, the system may not be
recovered until the engine is stopped and
the ignition key is turned to “ACC” or
“LOCK” position.
CAUTION
Be especially careful to prevent erro-
neous pedal operation.
If your engine stalls while
driving If you cannot incr
ease the
engine speed

03_SEQUOIA_U (L/O 0301)
331
2003 SEQUOIA from Jan. ’03 Prod. (OM34422U)
If towing is necessary, we recom-
mended you have it done by your
Toyota dealer or a commercial tow
truck service. In consultation with them,
have your vehicle towed using either (a)
or (b).
Only when you cannot receive a towing
service from a Toyota dealer or com-
mercial tow truck service, tow your ve-
hicle carefully in accordance with the
instructions given in “—Emergency tow-
ing” on page 332 in this section.
Proper equipment will help ensure that
your vehicle is not damaged while being
towed. Commercial operators are generally
aware of the state/provincial and local
laws pertaining to towing.
Your vehicle can be damaged if it is
towed incorrectly. Although most operators
know the correct procedure, it is possible
to make a mistake. To avoid damage to
your vehicle, make sure the following pre-
cautions are observed. If necessary, show
this page to the tow truck driver.TOWING PRECAUTIONS:
Use a safety chain system for all towing,
and abide by the state/provincial and local
laws. The wheels and axle on the ground
must be in good condition. If they are
damaged, use a towing dolly.
Twowheel drive models—
(a) Towing with wheel lift type truck
From front—
Use a towing dolly under the rear wheels.
NOTICE
Never tow a vehicle from the front
with the rear wheels on the ground,
as this may cause serious damage to
the transmission.
From rear—
Place the ignition key in the “ACC” posi-
tion.
NOTICE

When lifting wheels, take care to
ensure adequate ground clearance
for towing at the opposite end of
the raised vehicle. Otherwise, the
bumper and/or underbody of the
towed vehicle will be damaged dur-
ing towing.
 Do not tow with the key removed or
in the “LOCK” position, as the
steering lock mechanism is not
strong enough to hold the front
wheels straight while towing.
(b) Using flat bed truck
Fourwheel drive models—
(a) Towing with wheel lift type truck
From front—
Use a towing dolly under the rear wheels.
NOTICE
Never tow a vehicle from the front
with the rear wheels on the ground,
as this may cause serious damage to
the transmission.

03_SEQUOIA_U (L/O 0301)
332
2003 SEQUOIA from Jan. ’03 Prod. (OM34422U)
From rear—We recommend using a tow-
ing dolly under the front wheels. If you do
not use a towing dolly, place the ignition
key in the “ACC” position, put the trans-
mission in neutral and the transfer in “H”
(2WD mode).
NOTICE
Do not tow with the key removed or
in the “LOCK” position when towing
from the rear without a towing dolly.
The steering lock mechanism is not
strong enough to hold the front
wheels straight.
(b) Using flat bed truck
(c) Towing with sling type truck
All models—
(c) Towing with sling type truck
NOTICE
Do not tow with sling type truck, ei-
ther from the front or rear. This may
cause body damage.
If towing is necessary, we recommend
you to have it done by your Toyota
dealer or a commercial tow truck ser-
vice.
If towing service is not available in an
emergency, your vehicle may be tempo-
rarily towed by a cable or chain se-
cured to the emergency towing hook
under the front of the vehicle. Use ex-
treme caution when towing the vehicle.
NOTICE
Only use specified towing hook;
otherwise your vehicle may be dam-
aged.
—Emergency towing

03_SEQUOIA_U (L/O 0301)
355
2003 SEQUOIA from Jan. ’03 Prod. (OM34422U)
NOTICE
Remember that battery and ignition
cables carry high currents or volt-
ages. Be careful of accidentally
causing a short circuit.
 Add only demineralized or distilled
water to fill the radiator. And if you
spill some of the coolant, be sure
to wash it off with water to prevent
it from damaging the parts or paint.
 Do not allow dirt or anything else
to fall through the spark plug holes.
 Do not pry the outer electrode of a
spark plug against the center elec-
trode.
 Use only spark plugs of the speci-
fied type. Using other types will
cause engine damage, loss of per-
formance or radio noise.
 Do not overfill automatic transmis-
sion fluid, or the transmission
could be damaged.
Do not drive with the air cleaner
filter removed, or excessive engine
wear could result. Also backfiring
could cause a fire in the engine
compartment.
 Be careful not to scratch the glass
surface with the wiper frame.
 When closing the engine hood,
check to see that you have not for-
gotten any tools, rags, etc.Here is a list of parts and tools you will
need to perform doityourself mainte-
nance. Remember all Toyota parts are de-
signed in metric sizes, so your tools must
be metric.
CHECKING THE ENGINE OIL LEVEL
Parts (if level is low):
“Toyota Genuine Motor Oil” or equiva-
lent
See page 359 in Section 72 for de-
tails about engine oil selection.
Tools:
Rag or paper towel
Funnel (only for adding oil)
CHECKING THE ENGINE COOLANT
LEVEL
Parts (if level is low):
“Toyota Genuine Long Life Coolant” or
equivalent
See page 360 in Section 72 for de-
tails about coolant type selection.
Demineralized or distilled water
Tools:
Funnel (only for adding coolant)
Parts and tools

03_SEQUOIA_U (L/O 0301)
375
2003 SEQUOIA from Jan. ’03 Prod. (OM34422U)
If the headlights or other electrical
components do not work, check the
fuses. If any of the fuses are blown,
they must be replaced.
See “Fuse locations” on page 353 in Sec-
tion 71 for locations of the fuses.
Turn the ignition switch and inoperative
component off. Pull a suspected fuse
straight out and check it.
Determine which fuse may be causing the
problem. The lid of the fuse box shows
the name of the circuit for each fuse. See
page 388 in Section 8 of this manual for
the functions controlled by each circuit.
Type A fuses can be pulled out by using
the pullout tool. The location of the pull
out tool is shown in the illustration.
If you are not sure whether the fuse has
blown, try replacing the suspected fuse
with one that you know is good.
If the fuse has blown, push a new fuse
into the clip.
Only install a fuse with the amperage rat-
ing designated on the fuse box lid.
If you do not have a spare fuse, in an
emergency you can pull out the “DOME”
or “RAD” fuse, which may be dispensable
for normal driving, and use it if its amper-
age rating is the same.If you cannot use one of the same amper-
age, use one that is lower, but as close
as possible to the rating. If the amperage
is lower than that specified, the fuse
might blow out again but this does not
indicate anything wrong. Be sure to get
the correct fuse as soon as possible and
return the substitute to its original clip.
It is a good idea to purchase a set of
spare fuses and keep them in your ve-
hicle for emergencies.
If a new fuse immediately blows out, there
is a problem with the electrical system.
Have your Toyota dealer correct it as
soon as possible.
CAUTION
Never use a fuse with a higher am-
perage rating, or any other object, in
place of a fuse. This may cause ex-
tensive damage and possibly a fire.
If any washer does not work or low
windshield washer fluid level warning
light comes on, the washer tank may be
empty. Add washer fluid.
You may use plain water as washer fluid.
However, in cold areas where tempera-
tures range below freezing point, use
washer fluid containing antifreeze. This
product is available at your Toyota dealer
and most auto parts stores. Follow the
manufacturer ’s directions for how much to
mix with water.
NOTICE
Do not use engine antifreeze or any
other substitute because it may dam-
age your vehicle’s paint.
Adding washer fluid

03_SEQUOIA_U (L/O 0301)
376
2003 SEQUOIA from Jan. ’03 Prod. (OM34422U)
The following illustrations show how to
gain access to the bulbs. When replacing
a bulb, make sure the ignition switch and
light switch are off. Use bulbs with the
wattage ratings given in the table.
CAUTION
To prevent burning yourself, do not
replace the light bulbs while they
are hot.
Halogen bulbs have pressurized gas
inside and require special handling.
They can burst or shatter if
scratched or dropped. Hold a bulb
only by its plastic or metal case.
Do not touch the glass part of a
bulb with bare hands.
NOTICE
Only use a bulb of the listed type.
Light bulbsBulbNo.WTy p e
Headlights—60/55A
Front fog lights900655B
Parking, front side
marker and front
turn signal lights3157 NA27/8C
Rear turn signal
lights744021D
Stop/tail and rear
side marker lights744321/5D
Backup lights92118D
Tail lights1685D
License plate lights1685D
High mounted stop
light1685D
Interior lights—8E
Personal lights—3.8D
Glove box light—1.2D
Luggage
compartment light—8E
Vanity lights—3D
Door courtesy
lights1943.4D
A: HB2 halogen bulbs
B: HB4 halogen bulbs
C: Wedge base bulbs (amber)
D: Wedge base bulbs (clear)
E: Double end bulbs
Replacing light bulbs—

03_SEQUOIA_U (L/O 0301)
390
2003 SEQUOIA from Jan. ’03 Prod. (OM34422U)
20. AM2 25 A: Starting system, multiport
fuel injection system/sequential multi-
port fuel injection system, electronic
throttle control system, “IGN 1” and
“IGN 2” fuses
21. TURNHAZ 20 A: Turn signal lights,
emergency flashers
22. RAD NO.3 20 A: Car audio/video sys-
tem
23. ST 30 A: Starting system, “STA” fuse
24. HORN 10 A: Horns
25. EFI NO.2 10 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system, electronic throttle control
system
26. DOME 10 A: Center interior and per-
sonal lights, personal lights, luggage
compartment light, air conditioning sys-
tem, wireless remote control system,
garage door opener, ignition switch
light, door courtesy lights, foot light,
vanity lights, power antenna 27. ECUB 7.5 A:
Multiplex communication
system (power door lock system, secu-
rity system, autodoor locking system,
automatic light control system, head-
light delay off system, tail light auto
cut system, illuminated entry system,
daytime running light system), back
door lock system, driver and front pas-
senger door lock system, gauges and
meters
28. MIR HTR 15 A: Outside rear view mir-
ror heaters
29. RAD NO.1 25 A: Car audio system
30. TAIL 15 A: Tail lights, back door cour-
tesy light, license plate lights
31. ECUIG 10 A: Charging system, cruise
control system, antilock brake system,
vehicle skid control system, traction
control system (twowheel drive mod-
els), active traction control system
(fourwheel drive models), electronical-
ly controlled automatic transmission
system, power antenna, electric moon
roof, back door lock system, driver and
front passenger door lock system,
gauges and meters, multiinformation
display, SRS airbag system, front seat
belt pretensioners
32. WSH 25 A: Wipers and washer
33. AC INV 15 A: Power outlets 34. IGN 2 20 A:
Starting system
35. PWR NO.3 20 A: Rear passenger ’s
power window (right side)
36. PWR NO.4 20 A: Rear passenger ’s
power window (left side)
37. CIG 15 A: Air conditioning systems,
power rear view mirror control, ciga-
rette lighter
38. RAD NO.2 7.5 A: Car audio/video sys-
tem, power antenna, power outlets,
multiplex communication system (power
door lock system, security system,
autodoor locking system, automatic
light control system, headlight delay off
system, tail light auto cut system, illu-
minated entry system, daytime running
light system)
39. 4WD 20 A: A.D.D. control system,
fourwheel drive system
40. STOP 15 A: Stop lights, highmounted
stop lights, multiport fuel injection sys-
tem/sequential multiport fuel injection
system, vehicle skid control system,
traction control system (twowheel
drive models), active traction control
system (fourw heel drive models), mul-
tiplex communication system (autodoor
locking system)