2004 TOYOTA HIGHLANDER ECU

’04 HIGHLANDER_U (L/O 0308)
338
2004 HIGHLANDER from Aug. ’03 Prod. (OM48478U)
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.
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, 76 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.
—Lowering your vehicle

’04 HIGHLANDER_U (L/O 0308)
339
2004 HIGHLANDER from Aug. ’03 Prod. (OM48478U)
Ty p e A
Ty p e B 10.Reinstall the wheel ornament.
1. Put the wheel ornament into posi- tion.
2. Then tap it firmly with the side or heel of your hand to snap it into
place.
CAUTION
Take due care in handling the or-
nament to avoid unexpected per-
sonal injury.
11. Check the air pressure of the re- placed tire.
Adjust the air pressu re to the specifi-
cation designated on page 402 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 th e valve core and
possibly cause air leakage. If the cap
is missing, have a new one put on as
soon as possible.
12.Restow all the tools, jack and flat tire securely.
As soon after changing wheels as
possible, tighten the wheel nuts to the
torque specified on page 402 in Sec-
tion 8 with a torque wrench. Have a
technician repair the flat tire and re-
place the spare tire with it.
Initial adjustment of the tire pres-
sure warning system is necessary
after you have replaced your tires
or wheels. See “Tire pressure
warning system” on page 155 in
Section 17.
—Reinstalling wheel ornament —After changing wheels

’04 HIGHLANDER_U (L/O 0308)
343
2004 HIGHLANDER from Aug. ’03 Prod. (OM48478U)
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 one of the emergency towing
eyelets on the front of the vehicle. Use
extreme caution when towing the ve-
hicle.
To install the front towing eyelet, see
“—Installing front towing eyelet” on page
344 in this Section.
NOTICE
Only use specified towing eyelet;
otherwise your vehicle may be dam-
aged.
 Never tow a vehicle from the rear
with four wheels on the ground.
This may cause serious damage to
the transmission.
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 “N”. The key
must be in “ACC” (engine off) or “ON”
(engine running).
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

’04 HIGHLANDER_U (L/O 0308)
344
2004 HIGHLANDER from Aug. ’03 Prod. (OM48478U)
1. Remove the front towing eyelet cover
on the front bumper by pushing the
outside of the cover.2. Use the front towing eyelet in the lug-gage compartment. Secure it to the
hole on the bumper by turning clock-
wise. (For the towing eyelet location,
see “—Required tools and spare tire”
on page 330 in this Section.)3. Tighten the front towing eyelet securelyby a wheel nut wrench.
CAUTION
When installing the eyelet on the ve-
hicle, be sure to tighten the front
eyelet securely. If the eyelet is loose,
it may come off when being towed
and result in death or serious injury.
—Installing front towing eyelet

’04 HIGHLANDER_U (L/O 0308)
360
2004 HIGHLANDER from Aug. ’03 Prod. (OM48478U)
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 377 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 287 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. Check headlight aim.
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 seat controls such as seat
adjusters, seatback recliner, etc. operate
smoothly and that all latches lock securely
in any position. Check that the head re-
straints 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.
Brake pedal
Check the pedal for smooth operation and
that the pedal has the proper clearance.
Check the brake booster function.
Brakes
At a safe place, check that the brakes do
not pull to one side when applied. Parking brake
Check that the pedal 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.
Doors and engine hood
Check that all side doors and back door
operate smoothly and all latches lock se-
curely. Make sure the engine hood sec-
ondary latch secures the hood from open-
ing when the primary latch is released.

’04 HIGHLANDER_U (L/O 0308)
403
2004 HIGHLANDER from Aug. ’03 Prod. (OM48478U)
Instrument panel
Fuses (type A)
1. A/F 25 A: Air fuel ratio sensor
2. CRT 7.5 A: Rear seat entertainment
system, navigation system
3. STARTER 7.5 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system
4. EFI NO.2 10 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system
5. ETCS 10 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system
Engine compartment
(with daytime running light system)
6. RR HTR 15 A: Rear air conditioning
system
7. HEAD LP RH LWR 15 A: Right−hand
headlight (low beam)
8. HEAD LP LH LWR 15 A: Left−hand
headlight (low beam)
9. ALTS 7.5 A: Charging system
10. POWER OUTLET2 20 A: Power outlets
11. TOWING 20 A: Trailer lights
12. HORN 10 A: Horns
13. SECURITY 15 A: Theft deterrent sys-
tem 14. HLP RH UPR 10 A:
Right−hand head-
light (high beam)
15. ECU·B 7.5 A: Theft deterrent system,
air conditioning system, gauges and
meters, multiplex communication sys-
tem, electronic moon roof
16. EFI NO.1 20 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system, fuel pump
17. DOOR LOCK 25 A: Power door lock
system, theft deterrent system
18. HLP LH UPR 10 A: Left−hand head-
light (high beam)
19. RAD NO.1 25 A: Car audio system
20. DOME 10 A: Personal lights, interior
lights, vanity lights, ignition switch light,
wireless remote control system, gauges
and meters, navigation system
21. HAZARD 15 A: Emergency flashers,
instrument panel light, trailer lights
22. SPARE 7.5 A: Spare fuse
23. SPARE 15 A: Spare fuse
24. SPARE 25 A: Spare fuse
25. IGN 10 A: Gauges and meters, SRS
airbag system, multiport fuel injection
system/s equential multiport fuel injec-
tion system

’04 HIGHLANDER_U (L/O 0308)
404
2004 HIGHLANDER from Aug. ’03 Prod. (OM48478U)
26. RAD NO.2 7.5 A: Car audio system,
shift lock system, navigation system,
rear seat entertainment system, air
conditioning system, multiplex commu-
nication system
27. CIG 15 A: Cigarette lighter
28. P RR DOOR 20 A: Power windows
29. PWR OUTLET1 15 A: Power outlets
30. FR FOG 20 A: Front fog lights
31. ECUIG 10 A: Electric moon roof,
anti −lock brake system, vehicle stability
control system, shift lock system,
charging system, starting system
32. WIPER 25 A: Windshield wipers and
washer
33. D RR DOOR 20 A: Power windows
34. D FR DOOR 25 A: Power windows,
door courtesy lights, power door lock
system
35. S/ROOF 20 A: Electric moon roof
36. HEATER 10 A: Air conditioning system,
electric cooling fan, rear window defog-
ger, outside rear view mirror defogger,
gauges and meters 37. IG1 7.5 A:
Back−up lights, vehicle sta-
bility control system, multiport fuel in-
jection system/sequential multiport fuel
injection system, outside rear view mir-
ror heaters, power door lock system,
wireless remote control system, naviga-
tion system, multiplex communication
system
38. RR WIP 15 A: Rear window wiper
39. STOP 20 A: Stop lights, high mounted
stoplight, anti −lock brake system, ve-
hicle stability control system, shift lock
system, trailer lights, multiplex commu-
nication system, multiport fuel injection
system/se quential multiport fuel injec-
tion system
40. OBD 7.5 A: On−board diagnosis sys-
tem
41. SEAT HTR 15 A: Seat heaters
42. IG2 15 A: Multiport fuel injection sys-
tem/sequential multiport fuel injection
system, charging system, starter sys-
tem
43. WASHER 20 A: Low windshield washer
fluid level warning light
44. FR DEF 20 A: Air conditioning system,
outside rear view mirror defoggers 45. P FR DOOR 20 A:
Power windows,
door courtesy lights, multiplex commu-
nication system
46. TAIL 10 A: Tail lights, license plate
lights, instrument panel lights, front fog
lights, front side marker lights, rear
side marker lights, parking lights
47. PANEL 7.5 A: Instrument panel lights,
trailer lights
48. DRL 7.5 A: Daytime running light sys-
tem
Fuses (type B)
49. AM2 30 A: Multiport fuel injection sys-
tem/sequential multiport fuel injection
system, starting system
50. ABS2 50 A: Anti−lock brake system,
vehicle stability control system
51. ABS1 30 A: Anti−lock brake system,
vehicle stability control system
5

2. HTR 50 A: Air conditioning system
53. RDI 30 A: Electric cooling fans
54. RR DEF 30 A: Rear window defoggers
55. CDS 30 A: Electric cooling fans
56. MAIN 40 A: “H−LP RH LWR”, “H −LP
LH LWR”, “H −LP RH UPR” and “H −LP
LH UPR” fuses