Fuel system TOYOTA COROLLA 2003 E120 / 9.G Owner's Manual

’03 Corolla U (L/O 0201)
2002003 MY COROLLA_U (OM12744U)
Some states have vehicle emission in-
spection programs which include OBD
(OnBoard Diagnostics) checks.
The OBD system monitors the operation
of the emission control system. When the
OBD system determines that a problem
exists somewhere in the emission control
system, the malfunction indicator lamp
comes on. In this case, your vehicle may
not pass the I/M test and need to be
repaired. Contact your Toyota dealer to
service the vehicle.
Even if the malfunction indicator lamp
does not come on, your vehicle may not
pass the I/M test as readiness codes
have not been set in the OBD system.
Readiness codes are automatically set
during ordinary driving. However, when the
battery is disconnected or run down, the
codes are erased. Also, depending on
your driving habits, the codes may not be
completely set. Also, if the malfunction indicator lamp had
come on recently due to temporary mal-
function such as a loose fuel tank cap,
your vehicle may not pass the I/M test.
The malfunction indicator lamp will go off
after taking several driving trips, but the
error code in the OBD system will not be
cleared unless about 40 trips or more are
taken.
If your vehicle does not pass the I/M test
even the malfunction indicator lamp does
not come on, contact your Toyota dealer
to prepare the vehicle for retesting.
Emissions Inspection and
Maintenance (I/M) programs

’03 Corolla U (L/O 0201)
2112003 MY COROLLA_U (OM12744U)
API service symbol
ILSAC certification mark
Oil identification marks
Either or both API registered marks are
added to some oil containers to help
you select the oil you should use.
The API Service Symbol is located any-
where on the outside of the container.
The top portion of the label shows the oil
quality by API (American Petroleum Insti-
tute) designations such as SL. The center
portion of the label shows the SAE viscos-
ity grade such as SAE 5W30. “Energy
Conserving” shown in the lower portion,
indicates that the oil has fuelsaving ca-
pabilities.
The ILSAC (International Lubricant Stan-
dardization and Approval Committee) Certi-
fication Mark is displayed on the front of
the container.Look at the seethrough coolant reser-
voir when the engine is cold. The cool-
ant level is satisfactory if it is between
the “FULL” and “LOW” lines on the
reservoir. If the level is low, add ethyl-
eneglycol type coolant for a proper
corrosion protection of aluminum com-
ponents.
The coolant level in the reservoir will vary
with engine temperature. However, if the
level is on or below the “LOW” line, add
coolant. Bring the level up to the “FULL”
line.
Always use ethyleneglycol type coolant
for a proper corrosion protection of alumi-
num components. See information in the
next column.
If the coolant level drops within a short
time after replenishing, there may be a
leak in the system. Visually check the
radiator, hoses, engine coolant filler cap,
radiator cap and drain cock and water
pump.
If you can find no leak, have your Toyota
dealer test the cap pressure and check
for leaks in the cooling system.
Checking the engine coolant
level

’03 Corolla U (L/O 0201)
2382003 MY COROLLA_U (OM12744U)
Instrument panel
Fuses (type A)1. FOG 15 A: Front fog lights
2. HEAD LH UPR 10 A: Lefthand head-
light (high beam)
3. HEAD RH UPR 10 A: Righthand
headlight (high beam), high beam indi-
cator light
4. SPARE 30 A: Spare fuse
5. SPARE 15 A: Spare fuse
6. SPARE 10 A: Spare fuse
7. MAIN 30 A: Starting system, “AM2”
fuse 8. DOME 15 A:
Car audio system, clock,
personal lights, interior light, trunk light,
open door warning light, wireless re-
mote control system
9. HORN 10 A: Horn
10. HAZARD 10 A: Emergency flashers ,
turn signal lights
11. EFI 15 A: Multiport fuel injection sys-
tem/sequential multiport fuel injection
system, emission control system
12. ALTS 5 A: Charging system
13. HEAD LH LWR 10 A: Lefthand head-
light (low beam)
14. HEAD RH LWR 10 A: Righthand
headlight (low beam)
15. TAIL 15 A: Tail lights, license plate
lights, instrument panel lights , instru-
ment cluster lights
16. OBD 7.5 A: Onboard diagnosis sys-
tem
17. WIPER 25 A: Windshield wipers
18. AM2 15 A: Charging system, multiport
fuel injection system/sequential multi-
port fuel injection system, starting sys-
tem, SRS airbag system 19. STOP 15 A:
Stop lights, high mounted
stoplight, antilock brake system, shift
lock control system, engine control sys-
tem, cruise control system
20. DOOR 25 A: Power door lock system
21. AM1 25 A: “CIG” fuse
22. ECUIG 10 A: Electric cooling fan,
antilock brake system, shift lock con-
trol system, cruise control system
23. RR WIPER 15 A: No circuit
24. A/C 10 A: Air conditioning system
25. INV 15 A: No circuit
26. P/POINT 15 A: Power outlet (in the
rear console box)
27. ECUB 10 A: Daytime running light
system
28. CIG 15 A: Power outlet (on the instru-
ment panel) or cigarette lighter, car au-
dio system, clock, power rear view mir-
ror control, shift lock control system
29. GAUGE 10 A: Gauges and meters, air
conditioning system, daytime running
light system, charging system, auto
antiglare inside rear view mirror, pow-
er windows, cruise control system, rear
window defogger, backup lights, front
passenger ’s seat belt reminder light