2004 TOYOTA SIENNA ECU

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2004 SIENNA from Aug. ’04 Prod. (OM45422U)
To store the jack, turn the jack joint
until the jack base fits securely with
the vehicle body.
This prevents the jack from flying for-
ward during a collision or sudden
stop.To remove the wheel nut wrench, turn
the wingnut counterclockwise.
When storing the wheel nut wrench,
turn the wingnut clockwise and make
sure the wrench is securely held.To remove the spare tire:
1. Remove the lid.
2. Loosen the nut and remove it.
3. Remove the spare tire cover.
4. Loosen the bolt, then remove the bolt and spacer.
Then take the spare tire out of the
vehicle.

04 SIENNA_U (L/O 0408)
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2004 SIENNA from Aug. ’04 Prod. (OM45422U)
When storing the spare tire, put it in
place with the outer side of the wheel
facing up. Then secure the tire by re-
peating the above removal steps in
reverse order to prevent it from flying
forward during a collision or sudden
braking.
2. Block the wheel diagonally op-posite the flat tire to keep the
vehicle from rolling when it is
jacked up.
When blocking the wheel, place a
wheel block in front of one of the front
wheels or behind one of the rear
wheels.3. Remove the wheel ornament.
Pry off the wheel ornament, using the
beveled end of the wheel nut wrench
as shown.
CAUTION
Do not try to pull off the orna-
ment by hand. Take due care in
handling the ornament to avoid
unexpected personal injury.
—Blocking the wheel —Removing wheel ornament
(steel wheels)

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2004 SIENNA from Aug. ’04 Prod. (OM45422U)
9. Lower the vehicle completelyand tighten the wheel nuts.
Turn the jack handle counterclock-
wise to lower the vehicle.
Use only the wheel nut wrench to
tighten the nuts. Do not use other
tools or any additional leverage other
than your hands, such as a hammer,
pipe or your foot. Make sure the
wrench is securely engaged 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.
10.Reinstall the wheel ornament.
1. Put the wheel ornament into posi- tion.
Align the cutout of the wheel orna-
ment with the valve stem as shown. 2. Press hand firmly on one side of wheel ornament and then firmly
tap the other side around the edge
of wheel ornament with the heel
of your hand to snap into place.
—Lowering your vehicle —Reinstalling wheel ornament
(steel wheels)

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2004 SIENNA from Aug. ’04 Prod. (OM45422U)
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 463 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 370 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
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
and detachable second seats, 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
In 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
On a safe incline, check that your vehicle
is held securely with the selector lever in
“P” position and all brakes released.
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 the doors including back
door operate smoothly and all latches lock
securely. Make sure the engine hood sec-
ondary latch secures the hood from open-
ing when the primary latch is released.

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2004 SIENNA from Aug. ’04 Prod. (OM45422U)
13. DOME 10 A: Interior lights, personal
lights, vanity lights, door courtesy
lights, luggage compartment light, igni-
tion switch light, multi −information dis-
play
14. ECUB 10 A: Power sliding door, air
conditioning system, power windows,
multiplex communication system, meter
and gauge, wireless remote control
system
15. RAD NO.1 20 A: Audio system, navi-
gation system
16. SPARE 15 A: Spare fuse
17. SPARE 20 A: Spare fuse
18. SPARE 30 A: Spare fuse
19. SPARE 30 A: Spare fuse
20. SPARE 7.5 A: Spare fuse
21. HLP RH 10 A: Right−hand headlight
22. HLP LH 10 A: Left−hand headlight
23. RSE 7.5 A: Rear seat audio system,
rear seat entertainment system
24. MIR HTR 10 A: Outside rear view mir-
ror heaters
25. RAD2 7.5 A: Audio system, navigation
system, rear seat audio system, rear
seat entertainment system 26. PWR OUTLET 15 A:
Power outlets
27. CIG 15 A: Cigarette lighter
28. ECU ACC 7.5 A: Shift lock control
system, air c onditioning system, power
rear view mirror control
29. GAUGE2 7.5 A: Meter and gauge
30. IGN 7.5 A: Multiport fuel injection sys-
tem/sequential multiport fuel injection
system, SRS airbag system, multiplex
communication system
31. INJ 15 A: Multiport fuel injection sys-
tem/sequential multiport fuel injection
system
32. RR WIP 15 A: Rear window wiper
33. WIP 30 A: Windshield wiper and rear
window wiper
34. GAUGE1 10 A: Back−up lights, turn
signal lights, emergency flashers
35. SHTR 15 A: Seat heaters
36. WSH 20 A: Windshield washer and
rear window washer
37. HTR 10 A: Air conditioning system 38. ECUIG 10 A:
Toyota park assist sys-
tem, rear view monitor system, multi-
plex communication system, multiport
fuel injection system/sequential multi-
port fuel injection system, anti −lock
brake system, traction control system,
vehicle stability control system, shift
lock control system, dynamic laser
cruise control system, seat heaters,
power back door, electronic moon roof,
multi −information display, auto anti−
glare inside rear view mirror, power
windows, power outlets (115V)
39. PANEL 10 A: Air conditioning system,
seat heaters, audio system, navigation
system, power sliding door, power back
door, multi −information display, rear
wi

ndow defogger, emergency flashers,
instrument panel lights, steering switch
lights
40. TAIL 10 A: Stop/tail lights, license
plate lights, parking lights, side marker
lights
41. S/ROOF 25 A: Electronic moon roof
42. AC INV 15 A: Power outlets (115V)
43. FR DEF 15 A: Windshield wiper de−
icer
44. AM1 7.5 A: Multiport fuel injection sys-
tem/sequential multiport fuel injection
system