page 94 TOYOTA MR2 SPYDER 2003 W30 / 3.G Workshop Manual

2112003 MR2 from Aug. ’03 Prod. (OM17511U)
SB72031
Ty p e A
SB72030
Ty p e BKeep your tire inflation pressures
at the proper level.
The recommended cold tire inflation
pressures, tire
sizes and the com-
bined weight of occupants and cargo
(vehicle capacity weight) are de-
scribed on page 238 and 242. They
are also described on the tire and
loading information label. Either type
A or B of the tire and loading informa-
tion label is affixed on your vehicle
as shown.
You should check the tire inflation
pressures every two weeks, or at
least once a month. And do not forget
the spare!
The following instructions for
checking tire inflation pressure
should be observed:
 The pressure s hould be
checked only when the tires are
cold. If your vehicle has been
parked for at least 3 hours and has
not been driven for more than 1.5
km or 1 mile since, you will get
an accurate cold tire inflation pres-
sure reading.
03 07.07
Checking tire inflation
pressure

2142003 MR2 from Aug. ’03 Prod. (OM17511U)
The tires on your Toyota have builtin
tread wear indicators to help you
know when the tires need replace-
ment. When the tread depth wears to
1.6 mm (0.06 in.) or less, the indica-
tors will appear. If you can see the
indicators in two or more adjacent
grooves, the tire should be replaced.
The lower the tread, the higher the
risk of skidding.
Vehicles equipped with 185/55R15
or 215/45R16 tires: Your Toyota has
been fitted with specially developed
tires which provide exceptional dy-
namic performance under general
road conditions. However your riding
comfort may worsen a little and road
noise may increase during driving.
You may also notice that your tires
will wear more rapidly and tire grip
performance will be reduced on the
snowy and/or icy roads when
compared to standard tires. Be sure
to have snow tires or tire chains on
the snowy and/or icy roads and drive
carefully with the speed appropriate
for road conditions. NOTICE
Low profile tire like 185/55R15
or 215/45R16 may have greater
damage than usual tires to its
tire wheel when receiving im-
pact from the road surface.
Therefore, pay attention to the
followings.

Be sure to use with proper
tire pressure. If the tire pres-
sure is low, the tire may
have a greater damage. For
detailed information about
tire pressure, see page 242 in
Section 8.
 Avoid driving onto high,
sharpedged objects and oth-
er road hazards. Failure to
do so can lead to severe tire
damage.
The effectiveness of snow tires is
lost if the tread wears down below
4 mm (0.16 in.).
If you have tire damage such as
cuts, splits, cracks deep e nough to
expose the fabric, or bulges indi-
cating internal damage, the tire
should be repl aced.
If a tire often goes flat or cannot be
properly repaired due to the size or
location of a cut or other damage, it
should be replaced. If you are not
sure, consult with your Toyota dealer.
If an air loss occurs while driving, do
not continue driving with a deflated
tire. Driving even a short distance can
damage a tire beyond repair.
An y ti res wh i ch are over 6 years
old must be checked by a qualified
technician even if damage is not
obvious.
Tires deteriorate with age even if they
have never or seldom been used.
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2152003 MR2 from Aug. ’03 Prod. (OM17511U)
This also applies to the spare tire and
tires stored for future use.
REPLACING YOUR TIRES
When replacing a tire, use a tire of
the same size and construction,
and the same or greater maximum
load as the originally installed
tires. Also, all the tires must be the
same brand and have the same
tread patterns.
Using any other size or type of tire
may seriously affect handling, ride,
speedometer/odometer calibration,
ground clearance, and clearance be-
tween the body and tires or snow
chains.Check that the maximum load of the
replaced tire is greater than 1/2 of the
Gross Axle Weight Ratings (GAWR)
of either the front axle or the rear
axle, whichever greater. As for the
maximum load of the tire, see the load
limit at maximum cold tire inflation
pressure mentioned on the sidewall
of the tire, and as for the Gross Axle
Weight Ratings (GAWR), see the Cer-
tification Label. For details about the
sidewall of the tire and the Certifica-
tion Label, see pages 141 and 139.CAUTION
Observe the following instruc-
tions. Otherwise, an accident
may occur resulting in death or
serious injuries.

Do not mix radial, bias belted,
or biasply tires on your ve-
hicle, as this may cause dan-
gerous handling characteris-
tics resulting in loss of control.
 Do not use tires other than the
manufacturer’s recommended
size, as this may cause danger-
ous handling characteristics
resulting in loss of control.
 Do not use tires of different
brands, sizes, construction or
tread patterns, as this may
cause dangerous handling
characteristics resulting in
loss of control.
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2162003 MR2 from Aug. ’03 Prod. (OM17511U)
Toyota recommends all four tires,
or at least both front or rear tires
be replaced as a set.
See “If you have a flat tire—” on page
167 in Section 4 for tire change proce-
dure.
When a tire is replaced, the wheel
should always be balanced.
An unbalanced wheel may affect ve-
hicle handling and tire life. Wheels
can get out of balance with regular
use and should therefore be balanced
occasionally.
When replacing a tubeless tire, the
air valve should also be replaced
w i t h a new on e.
Rotating tires
SB72017Tu r ning dir ec t ion
Turning direction indicators
SB72019
Do not rotate the tires as the tire
sizes are different such as with
front to rear, left to right or using
the spare tire. Performing such tire
rotation may result in the tires in-
terfering with the body or in un-
even wear of the tires, so that
steerability of the vehicle is im-
paired.
Tires with turning direction indicator—
The tire is a unidirectional type and
cannot be used for tire rotation. Using
the tire on the opposite side to the
designated side will impair the tire
performance.
The spare tire—
The tire is designed for temporary use
only and cannot be used for tire rota-
tion.
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2242003 MR2 from Aug. ’03 Prod. (OM17511U)
Checking and replacing fuses
SB73035
GoodBlown
Ty p e A
SB73036
Good Blown
Ty p e B
SB73037
Good Blown
Ty p e C
SB73066
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 200 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 243 in Section 8 of this manual for
the functions controlled by each circuit.
Type A fuses can be pulled out by the
pullout tool. The location of the pullout
tool is shown in the illustration.
03 07.07

2422003 MR2 from Aug. ’03 Prod. (OM17511U)
Tires
Tire size and cold tire inflation pressure:
Except spare tire
Ti r e siz eTi r e inf lat ion pr es s ur e
kPa (kgf/cm2 or bar, psi)Wheel size
Front185/55R15 81V180 (1.8, 26)15 6JJ
Rear215/45R16 86W220 (2.2, 32)16 7JJ
Spare tire
Ti r e siz e
Tire inflation pressure kPa (kgf/cm2 or bar, psi)Wheel size
185/55R15 81V180 (1.8, 26)156JJ
Wheel nut torque, N·m (kgf·m, ft·Ibf):
103 (10.5, 76)
NOTE: For a complete information on tires (e.g. replacing tires or replacing wheels), see “Checking tire inflation pres- sure” through “Aluminum wheel precautions”, page 211 through 219 in Section 72.
03 07.07

2003 MR2 from Aug. ’03 Prod. (OM17511U)
03 07.07
C
Publication No. OM17511U
Part No. 01999-17511
Printed in Japan 01030800
MR2(U)
Quick index
If a service reminder indicator or warning buzzer comes on 77 . . . .
 If your vehicle will not start 162 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
 If your engine stalls while driving 165 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
 If your vehicle overheats 166 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\

 If you have a flat tire 167 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . .
 If your vehicle needs to be towed 177 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
 Tips for driving during breakin period 130 . . . . . . . . . . . . . . . . . . . . . . . .
 How to start the engine 154 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
.
 General maintenance 193 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . .
 Complete index 247 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . .
Gas station information
Fuel type:
UNLEADED gasoline, Octane Rating 87
(Research Octane Number 91) or higher
See page 130 for detailed information.
Fuel tank capacity:
48 L (12.7 gal., 10.6 lmp. gal.)
Engine oil:
API grade SL “EnergyConserving” or ILSAC multigrade engine oil
is recommended.
See page 206 for detailed information.
Tire information: See pages 211 through 219.
Tire pressure: See page 242.
U6