2003 TOYOTA COROLLA check engine

’03 Corolla U (L/O 0201)
2122003 MY COROLLA_U (OM12744U)
CAUTION
To prevent burning yourself, do not
remove the radiator cap when the en-
gine is hot.
Coolant type selection
Use of improper coolants may damage
your engine cooling system. Your coolant
must contain ethyleneglycol type coolant
for a proper corrosion protection of your
engine that contains aluminum compo-
nents. Use “TOYOTA Long Life Coolant”
or equivalent.
In addition to preventing freezing and sub-
sequent damage to the engine, this type
of coolant will also prevent corrosion. Fur-
ther supplemental inhibitors or additives
are neither needed nor recommended.
Read the coolant container for information
on freeze protection. Follow the manufac-
turer’s directions for how much to mix
with plain water (preferably demineralized
water or distilled water). The total capacity
of the cooling system is given on page
235 in Section 8. We recommend to use 50% solution for
your Toyota, to provide protection down to
about 35
C (31 F). When it is extreme-
ly cold, to provide protection down to
about 50 C (58 F), 60% solution is rec-
ommended. Do not use more than 70%
solution for better coolant performance.NOTICE
Do not use alcohol type antifreeze or
plain water alone.
If any of the above parts are extremely
dirty or you are not sure of their condi-
tion, take your vehicle to Toyota dealer.
CAUTION
To prevent yourself from burning, be
careful not to touch the radiator or
condenser when the engine is hot.
NOTICE
To prevent damage to the radiator
and condenser, do not perform the
work by yourself.
Checking the radiator and
condenser

’03 Corolla U (L/O 0201)
2132003 MY COROLLA_U (OM12744U)
To check the fluid level, simply look at
the seethrough reservoir. The level
should be between the “MAX” and
“MIN” lines on the reservoir.
It is normal for the brake fluid level to go
down slightly as the brake pads wear. So
be sure to keep the reservoir filled.
If the reservoir needs frequent refilling, it
may indicate a serious mechanical prob-
lem. If the level is low, add SAE J1703 or
FMVSS No.116 DOT 3 brake fluid to the
brake reservoir.
Remove and replace the reservoir cap by
hand. Fill the brake fluid to the dotted
line. This brings the fluid to the correct
level when you put the cap back on.
Use only newly opened brake fluid. Once
opened, brake fluid absorbs moisture from
the air, and excess moisture can cause a
dangerous loss of braking.
CAUTION
Take care when filling the r
eservoir
because brake fluid can harm your
eyes and damage painted surfaces. If
fluid gets in your eyes, flush your
eyes with clean water immediately. If
you still feel uncomfortable with your
eyes, go to the doctor.
NOTICE
If you spill some of the fluid, be sure
to wash it off with water to prevent
it from damaging the parts or paint.
If cold O.K.
If cold add If hot O.K.
If hot add
Close
Open
Check the fluid level through the reser-
voir. If necessary, add automatic trans-
mission fluid DEXRON
 II or III.
If the vehicle has been driven around 80
km/h (50 mph) for 20 minutes (a little
more in frigid temperatures), the fluid is
hot (60 C—80 C or 140 F—175 F). You
may also check the level when the fluid
is cold (about room temperature,
10 C—30 C or 50 F—85 F) if the engine
has not been run for about five hours.
Checking brake fluid Checking power steering fluid

’03 Corolla U (L/O 0201)
2232003 MY COROLLA_U (OM12744U)
NOTICE
Be sure the engine and all accesso-
ries are off before performing main-
tenance.
 When checking the battery, remove
the ground cable from the negative
terminal (“” mark) first and rein-
stall it last.
 Be careful not to cause a short cir-
cuit with tools.
 Take care no solution gets into the
battery when washing it.
Ty p e A
Green Dark Clear or
light yellow
Ty p e B Blue White Red
CHECKING BY INDICATOR
Check the battery condition by the indi-
cator color.
Indicator color
ConditionTy p e ATy p e B
GreenBlueGood
DarkWhite
Charging necessary.
Have battery
checked by your
Toyota dealer.
Clear orlight
yellow
Red
Have battery
checked by your
Toyota dealer.
During recharging, the battery is pro-
ducing hydrogen gas.
Therefore, before recharging:
1. If recharging with the battery installed on the vehicle, be sure to disconnect
the ground cable.
2. Be sure the power switch on the re- charger is off when connecting the
charger cables to the battery and when
disconnecting them.
CAUTION
Always charge the battery in an un-
confined area. Do not charge the
battery in a garage or closed room
where there is not sufficient ventila-
tion.
Only do a slow charge (5 A or
less). Charging at a quicker rate is
dangerous. The battery may ex-
plode, causing personal injuries.
NOTICE
Never recharge the battery while the
engine is running. Also, be sure all
accessories are turned off.
—Checking battery c ondition Battery recharging pr ecautions

’03 Corolla U (L/O 0201)
2352003 MY COROLLA_U (OM12744U)
ENGINE
Valve clearance (engine cold), mm (in.):Intake 0.15—0.25 (0.006—0.010)
Exhaust 0.25—0.35 (0.010—0.014)
Spark plug type: DENSO SK16R11
NGK IFR5A11
Spark plug gap, mm(in.): 1.1 (0.043) ENGINE LUBRICATION
Oil capacity (drain and ref
ill),
L (qt., Imp. qt.):
With filter 3.7 (3.9, 3.3)
Without filter 3.5 (3.7, 3.1)
Oil grade: API grade SL “EnergyConserving” or
ILSAC multigrade engine oil is recom-
mended.
Recommended oil viscosity: SAE 5W30
Outside temperature
COOLING SYSTEM
Total capacity, L (qt., Imp. qt.):6.5 (6.9, 5.7)
Coolant type: “TOYOTA Long Life Coolant” or equiva-
lent
With ethyleneglycol type coolant for a
proper corrosion protection of aluminum
components
Do not use alcohol type antifreeze or
plain water alone.
BATTERY
Open voltage
∗ at 20 C (68 F):
12.6—12.8 V Fully charged
12.2—12.4 V Half charged
11.8—12.0 V Discharged
∗: Voltage that is checked 20 minutes af-
ter the key is removed with all the
lights turned off.
Charging rates: 5 A max.
CLUTCH
Pedal free play, mm (in.): 5—15 (0.2—0.6)
Fluid type: SAE J1703 or FMVSS No.116 DOT 3
Service specifications

’03 Corolla U (L/O 0201)
2372003 MY COROLLA_U (OM12744U)
Engine compartment
Tires
Tire size
P185/65R15 86S Front
P195/65R15 89S210 (2.1, 30)
210 (2.1, 30) Rear
210 (2.1, 30)
210 (2.1, 30) Wheel size
15 6 JJ
15 6 JJ
Compact spare tire kPa (kgf/cm
2 or bar, psi) Wheel size
T125/70R16 96M 420 (4.2, 61) 16  4T
Wheel nut torque, N·m (kgf·m, ft·lbf): 102.9 (10.5, 76)
NOTE: For a complete information on tires (e.g. replacing tires or replacing wheels), see “Checking tire pressure” through “Aluminum wheel precautions”, pages
214 through 219, in Section 72.
Tire size and pressure:
kPa (kgf/cm
2 or bar, psi)
Fuses