2006 TOYOTA MATRIX ECU

’06 MATRIX_U (L/O 0508)
238
8. Reinstall all the wheel nuts fin-ger tight.
Reinstall the wheel nuts (tapered end
inward) and tighten them as much as
you can by hand. Press back on the
tire back and see if you can tighten
them more.
CAUTION
Never use oil or grease on the
bolts or nuts. Doing so may lead
to overtightening the nuts and
damaging the bolts. The nuts
may loose and the wheels may
fall off, which could cause a seri-
ous accident. If there is oil or
grease on any bolt or nut, clean
it.
9. Lower the vehicle completely and tighten the wheel nuts.
Turn the jack handle counterclock-
wise to lower the vehicle.
Use only the wheel nut wrench and
turn it clockwise to tighten the nuts.
Do not use other tools or any addition-
al leverage other than your hands,
such as a hammer, pipe or your foot.
Make sure the wrench is securely en-
gaged over the nut.
Tighten each nut a little at a time in
the order shown. Repeat the process
until all the nuts are tight.
—Reinstalling wheel nuts —Lowering your vehicle

’06 MATRIX_U (L/O 0508)
239
CAUTION
When lowering the vehicle,
make sure all portions of your
body and all other persons
around will not be injured as
the vehicle is lowered to the
ground.
 Have the wheel nuts tightened
with torque wrench to 103 N·m
(10.5 kgf·m, 77 ft·lbf), as soon
as possible after changing
wheels. Otherwise, the nuts
may loosen and the wheels
may fall off, which could cause
a serious accident.
10.Restow all the tools and jack se-
curely in the luggage storage
box. Then secure the flat tire in
the luggage compartment with
the tire tiedown belts and tie
down hooks as follows.
CAUTION
Before driving, make sure all the
tools, jack and flat tire are se-
curely in place in their storage
location to reduce the possibility
of personal injury during a colli-
sion or sudden braking.
1. Aluminum wheels—Before stow-ing the flat tire, remove the center
wheel ornament by pushing from
the reverse side.
Be careful not to lose the wheel orna-
ment.
—Stowing flat tire

’06 MATRIX_U (L/O 0508)
241
5. Position the tire edge against therear center end of the rear luggage
storage box lid. Then pull the ends
of the belts to se cure the tire se-
curely.
After stowing the flat tire, check that
the tire and belts are secured.
To loosen the tire tie −down belts, see
“Tie −down hooks and tire tie −down
belts” on page 176 in Section 1 −10. 11. Check the air pressure of the re-
placed tire.
Adjust the air pressu re to the specifi-
cation designated on page 306 in
Section 8. If the pressure is lower,
drive slowly to the nearest service
station and fill to the correct pressure.
Do not forget to reinstall the tire infla-
tion valve cap as dirt and moisture
could get into the valve core and
possibly cause air leakage. If the cap
is missing, have a new one put on as
soon as possible.
As soon after changing wheels as
possible, tighten the wheel nuts to the
torque specified on page 306 in Sec-
tion 8 with a torque wrench. Have a
technician repair the flat tire.
—After changing wheels

’06 MATRIX_U (L/O 0508)
246
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 eyelet
under the front of the vehicle. Use ex-
treme caution when towing vehicle.
NOTICE
Only use specified towing eyelet;
otherwise your vehicle may be dam-
aged.
A driver must be in the vehicle to steer
it and operate the brakes.
Towing in this manner may be done only
on hard−surfaced roads for a short dis-
tance and at low speeds. Also, the
wheels, axles, drive train, steering and
brakes must all be in good condition.
CAUTION
Use extreme caution when towing ve-
hicles. Avoid sudden starts or erratic
driving maneuvers which would place
excessive stress on the emergency
towing eyelet and towing cable or
chain. The eyelet and towing cable or
chain may break and cause serious
injury or damage.
NOTICE
Use only a cable or chain specifically
intended for use in towing vehicles.
Securely fasten the cable or chain to
the towing eyelet provided.
Before towing, release the parking brake
and put the transmission in neutral (manu-
al) or “N” (automatic). The key must be
in “ACC” (engine off) or “ON” (engine run-
ning).
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.
—Emergency towing

’06 MATRIX_U (L/O 0508)
260
Power steering fluid level
Check the level through the reservoir. The
level should be in the “HOT” or “COLD”
range depending on the fluid temperature.
See page 276 in Section 7−2 for addition-
al information.
Exhaust system
If you notice any change in the sound of
the exhaust or smell exhaust fumes, have
the cause located and corrected immedi-
ately. (See “Engine exhaust cautions” on
page 186 in Section 2.)
INSIDE THE VEHICLE
Items listed below should be checked
regularly, e.g. while performing periodic
services, cleaning the vehicle, etc.
Lights
Make sure the headlights, stop lights, tail
lights, turn signal lights, and other lights
are all working.
Service reminder indicators and warning
buzzers
Check that all service reminder indicators
and warning buzzers function properly.
Steering wheel
Check that it has the specified free play.
Be alert for changes in steering condition,
such as hard steering or strange noise. Seats
Check that all front seat controls such as
seat adjusters, seatback recliner, etc. op-
erate smoothly and that all latches lock
securely in any position. Check that the
head restraints move up and down
smoothly and that the locks hold securely
in any latched position. For folding
−down
rear seatbacks, check that the latches
lock securely.
Seat belts
Check that the seat belt system such as
buckles, retractors and anchors operate
properly and smoothly. Make sure the belt
webbing is not cut, frayed, worn or dam-
aged.
Accelerator pedal
Check the pedal for smooth operation and
uneven pedal effort or catching.
Clutch pedal
Check the pedal for smooth operation.
Brake pedal
Check the pedal for smooth operation and
that the pedal has the proper clearance.
Check the brake booster function.
Brakes
In a safe place, check that the brakes do
not pull to one side when applied. Parking brake
Check that the lever has the proper travel
and that, on a safe incline, your vehicle
is held securely with only the parking
brake applied.
Automatic transmission “Park” mecha-
nism
Check the lock release button of the se-
lector lever for proper and smooth opera-
tion. On a safe incline, check that your
vehicle is held securely with the selector
lever in “P” position and all brakes re-
leased.
OUTSIDE THE VEHICLE
Items listed below should be performed
from time to time, unless otherwise
specified.
Fluid leaks
Check underneath for leaking fuel, oil, wa-
ter or other fluid after the vehicle has
been parked for a while. If you smell fuel
fumes or notice any leak, have the cause
found and corrected immediately.

’06 MATRIX_U (L/O 0508)
261
Doors and engine hood
Check that all doors and back door includ-
ing glass hatch operate smoothly and all
latches lock securely. Make sure the en-
gine hood secondary latch secures the
hood from opening when the primary latch
is released.
Tire inflation pressure
Check the pressure with a gauge ev-
ery two weeks, or at least once a
month. See page 277 in Section 7−2
for additional information.
Tire surface and wheel nuts
Check the tires carefully for cuts,
damage or excessive wear. See page
280 in Section 7− 2 for additional in-
formation. When checking the tires,
make sure no nuts are missing, and
check the nuts for looseness. Tighten
them if necessary.
Tire rotation
Rotate the tires according to the
maintenance schedule. (For sched-
uled maintenance information, please
refer to the “Scheduled Maintenance
Guide” or “Owner ’s Manual Supple-
ment”.) See page 283 in Section 7 −2
for additional information.
Be on the alert for changes in perfor-
mance, sounds, and visual tip −offs that
indicate service is needed. Some impor-
tant clues are as follows:
Engine missing, stumbling, or pinging
Appreciable loss of power
Strange engine noises
A leak under the vehicle (however, wa-
ter dripping from the air conditioning
after use is normal.)
Change in exhaust sound (This may
indicate a dangerous carbon monoxide
leak. Drive with the windows open and
have the exhaust system checked im-
mediately.)
Flat −looking tire; excessive tire squeal
when cornering; uneven tire wear
Vehicle pulls to one side when driving
straight on a level road
Strange noises related to suspension
movement
Loss of brake effectiveness; spongy
feeling brake or clutch pedal; pedal al-
most touches floor; vehicle pulls to one
side when braking
Engine coolant temperature continually
higher than normal If you notice any of these clues, take your
vehicle to your Toyota dealer as soon as
possible. It probably needs adjustment or
repair.
CAUTION
Do not continue driving with the ve-
hicle unchecked. It could result in se-
rious vehicle damage and possibly
personal injury.
Does your vehicle need
repairing?

’06 MATRIX_U (L/O 0508)
308
18. TAIL 15 A: Tail lights, license plate
lights, instrument panel lights, instru-
ment cluster lights, clock
19. OBD 7.5 A: On−board diagnosis sys-
tem
20. WIPER 25 A: Windshield wipers
21. AM2 15 A: Charging system, multiport
fuel injection system/sequential multi-
port fuel injection system, starting sys-
tem, SRS airbag system
22. STOP 15 A: Stop lights, high mounted
stoplight, anti −lock brake system, shift
lock control system, multiport fuel in-
jection system/sequential multiport fuel
injection system, cruise control system
23. DOOR 25 A: Power door lock system,
glass hatch opener switch
24. AM1 25 A: “CIG” fuse
25. ECUIG 10 A: Electric cooling fan,
anti −lock brake system, traction control
system, vehicle stability control system,
brake assist system, shift lock control
system, cruise control system
26. RR WIPER 15 A: Rear window wiper
27. A/C 10 A: Air conditioning system
28. INV 15 A: Power outlet (115 VAC)
29. P/POINT 15 A: Power outlet (12 VDC/
in the rear console box) 30. ECUB 10 A:
Daytime running light
system
31. CIG 15 A: Power outlet (12 VDC/on
the instrument panel) or cigarette light-
er, audio system, clock, shift lock con-
trol system
32. GAUGE 10 A: Gauges and meters, air
conditioning system, daytime running
light system, charging system, auto
anti −glare inside rear view mirror, pow-
er windows, cruise control system, rear
window defogger, back −up lights, front
passenger ’s seat belt reminder light,
emergency flasher
33. WASHER 15 A: Windshield washer,
rear window washer
34. MHTR/DEF IUP 10 A: Engine control
system
Fuses (type B)
35. ABS NO.1 30 A: Anti−lock brake sys-
tem, traction control system, vehicle
stability control system, brake assist
system
36. RDI FAN 40 A: Electric cooling fan 37. ABS NO.2 40 A (without vehicle sta-
bility control system): Anti−lock brake
system
ABS NO.2 50 A (with vehicle stability
control system): Anti−lock brake sys-
tem, traction control system, vehicle
stability control system, brake assist
system
38. HEAD MAIN 40 A: “HEAD LH UPR”,
“ H

EAD RH UPR”, “HEAD LH LWR” and
“HEAD RH LWR” fuses
39. AIR PUMP 50 A (1.8 L 4cylinder [1ZZFE] engine with fourwheel
drive models and 1.8 L 4cylinder
[2ZZGE] engine only): Emission con-
trol system
40. HTR 40 A: Air conditioning system
41. DEF 30 A: Rear window defogger,
“M −HTR/DEF I −UP” fuse
42. POWER 30 A: Power windows, electric
moon roof
Fuses (type C)
43. ALT 100 A: “ABS NO.1”, “ABS NO.2”,
“RDI FAN”, “FOG”, “HTR”, “AM1”,
“POWER”, “DOOR”, “ECU −B”, “TAIL”,
“STOP”, “P/POINT”, “INV” and “OBD”
fuses, charging system