
00 SIENNA(U)
225
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 under the vehicle. Use extreme
caution when towing vehicles.
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 eyelets and towing cable or
chain. The eyelets 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 eyelets 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.
If you lose your keys
Please contact your nearest Toyota
dealer and ask for duplicating key. You
must inform them of the key number
and, in case of making the immobiliser
key, one of the master keys must be
presented.
See the suggestion given in “Keys” in
Section 1−2.
If your keys are locked in the vehicle and
you cannot get a duplicate, many Toyota
dealers can still open the door for you,
using their special tools. If you must
break a window to get in, we suggest
breaking the smallest side window be-
cause it is the least expensive to replace.
Be extremely cautious to avoid cuts from
the glass.
Vehicles with engine immobiliser system—
Even if you lose only one key, contact
your Toyota dealer to make a new key.
However, if you lose all your master keys,
the dealer cannot duplicate key but only
replace the whole system.
ProCarManuals.com

00 SIENNA(U)
235
If you are a skilled do−it−yourself mechan-
ic, the Toyota service manuals are recom-
mended. Please be aware that do−it−your-
self maintenance can affect your warranty
coverage. See “Owner ’s Warranty Informa-
tion Booklet” or “Owner ’s Manual Supple-
ment” for the details.
General maintenance
Listed below are the general maintenance
items that should be performed as fre-
quently as specified. In addition to check-
ing the items listed, if you notice any
unusual noise, smell or vibration, you
should investigate the cause or take your
vehicle to your Toyota dealer or a quali-
fied service shop immediately. It is recom-
mended that any problem you notice be
brought to the attention of your dealer or
the qualified service shop for their advice.
CAUTION
Make these checks only where ade-
quate ventilation can be obtained if
you run the engine.
OUTSIDE THE VEHICLE
Items listed below should be performed
from time to time, unless otherwise
specified.
Tire pressure
Check the pressure with a gauge every
two weeks, or at least once a month. See
Section 7−2 for additional information.Tire surface and wheel nuts
Check the tires carefully for cuts, damage
or excessive wear. See Section 7−2 for
additional information. 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 every 12000 km (7500
miles). See Section 7−2 for additional in-
formation.
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 doors including trunk lid
operate smoothly and all latches lock se-
curely. Make sure the engine hood secon-
dary latch secures the hood from opening
when the primary latch is released.
INSIDE THE VEHICLE
Items listed below should be checked
regularly, e.g. while performing periodic
services, cleaning the vehicle, etc.
ProCarManuals.com

00 SIENNA(U)
236
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 rear 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
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
On a safe incline, check that your vehicle
is held securely with the selector lever in
“P” position and all brakes released.IN THE ENGINE COMPARTMENT
Items listed below should be checked
from time to time, e.g. each time when
refueling.
Washer fluid
Make sure there is sufficient fluid in the
tank. See Section 7−3 for additional infor-
mation.
Engine coolant level
Make sure the coolant level is between
the “FULL” and “LOW” lines on the see−
through reservoir when the engine is cold.
See Section 7−2 for additional information.
Battery electrolyte level
Make sure the electrolyte level of all bat-
tery cells is between upper and lower lev-
el lines on the case. Add only distilled
water when replenishing. See Section 7−3
for additional information.
Brake fluid level
Make sure the brake fluid level is correct.
See Section 7−2 for additional information.
Engine oil level
Check the level on the dipstick with the
engine turned off and the vehicle parked
on a level spot. See Section 7−2 for addi-
tional information.
ProCarManuals.com

00 SIENNA(U)
240
Engine compartment overview
1. Engine coolant reservoir
2. Power steering fluid reservoir
3. Engine oil level dipstick
4. Engine oil filler cap
5. Brake fluid reservoir
6. Fuse blocks
7. Battery
8. Electric cooling fans
9. Windshield and rear window washer
fluid tank
ProCarManuals.com

00 SIENNA(U)
249
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 reservoir
because brake fluid can harm your
eyes and damage painted surfaces. If
fluid gets in your eyes, flush your
eyes with clean water.
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.
Checking power steering fluid
If hot
O.K.
If cold
O.K. Close
If hot
addIf cold
add Open
Check the fluid level through the reser-
voir. If necessary, add automatic trans-
mission fluid DEXRONII 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 (60C—80C or 140F—175F). You
may also check the level when the fluid
is cold (about room temperature,
10C—30C or 50F—85F) if the engine
has not been run for about five hours.Clean all dirt from outside of the reservoir
tank and look at the fluid level. If the fluid
is cold, the level should be in the “COLD”
range. Similarly, if it is hot, the fluid level
should be in the “HOT” range. If the level
is at the low side of either range, add
automatic transmission fluid DEXRONII
or III to bring the level within the range.
To remove the filler cap, turn it counter-
clockwise and lift up. To reinstall it, turn
it clockwise. After replacing the filler
cap,visually check the steering box case,
vane pump and hose connections for
leaks or damage.
CAUTION
The reservoir tank may be hot so be
careful not to burn yourself.
NOTICE
Avoid overfilling, or the power steer-
ing could be damaged.
ProCarManuals.com

00 SIENNA(U)
253
WHEN TO USE SNOW TIRES OR
CHAINS
Snow tires or chains are recommended
when driving on snow or ice.
On wet or dry roads, conventional tires
provide better traction than snow tires.
SNOW TIRE SELECTION
If you need snow tires, select the same
size, construction and load capacity as
the original tires on your Toyota.
Do not use tires other than those men-
tioned above. Do not install studded tires
without first checking local regulations for
possible restrictions.
SNOW TIRE INSTALLATION
Snow tires should be installed on all
wheels.
Installing snow tires on the front wheels
only can lead to an excessive difference
in road grip capability between the front
and rear tires which could cause loss of
vehicle control.
When storing removed tires, you should
store them in a cool dry place. Mark the
direction of rotation and be sure to install
them in the same direction when replac-
ing.CAUTION
Do not drive with the snow tires
incorrectly inflated.
Never drive over 120 km/h (75 mph)
with any type of snow tires.
TIRE CHAIN SELECTION
Use the tire chains of correct size and
type.
Use SAE Class “S” type radial tire chains
except radial cable chains or V−bar type
chains.
Regulations regarding the use of tire
chains vary according to location or
type of road, so always check them
before installing chains.
CHAIN INSTALLATION
Install the chains on the front tires as
tightly as possible. Do not use tire
chains on the rear tires. Retighten
chains after driving 0.5—1.0 km
(1/4—1/2 mile).
When installing chains on your tires, care-
fully follow the instructions of the chain
manufacturer.If wheel covers are used, they will be
scratched by the chain band, so remove
the covers before putting on the chains.
CAUTION
Do not exceed 50 km/h (30 mph) or
the chain manufacturer ’s recom-
mended speed limit, whichever is
lower.
Drive carefully avoiding bumps,
holes, and sharp turns, which may
cause the vehicle to bounce.
Avoid sharp turns or locked−wheel
braking, as use of chains may ad-
versely affect vehicle handling.
NOTICE
Do not attempt to use a tire chain on
the compact spare tire, as it may re-
sult in damage to the vehicle as well
as the tire.
Installing snow tires and
chains
ProCarManuals.com

00 SIENNA(U)
271
Engine compartment
(with daytime running light system)
9. AM2 30 A: “IGN” and “STARTER”
fuses
10. H−LP LH 15 A: Left−hand headlight
11. RADIO NO.1 20 A: Car audio system
12. DOME 10 A: Clock, personal lights,
vanity mirror lights, door courtesy
lights, luggage compartment light, open
door warning light, ignition switch light,
theft deterrent system, daytime running
light system, interior lights
13. ECU−B 10 A: Cruise control system,
SRS warning light, power sliding door
14. DRL 5 A: Daytime running light system
Instrument panel
15. H−LP LH (LWR) 10 A: Left−hand head-
light (low beam)
16. H−LP RH (LWR) 10 A: Right−hand
headlight (low beam)
17. HEATER 10 A: Air conditioning system,
rear window defogger
18. GAUGE 10 A: Gauges and meters,
service reminder indicators and warning
buzzers (except discharge and open
door warning light), power windows,
daytime running light system, back−up
lights
Instrument panel
19. WIPER 25 A: Windshield wipers and
washer
20. MIRROR−HEATER 10 A: Multiport fuel
injection system/sequential multiport
fuel injection system, outside rear view
mirror defogger
21. ECU−IG 15 A: Cruise control system,
anti−lock brake system, locking with
wireless remote control system, theft
deterrent system
ProCarManuals.com

00 SIENNA(U)
272
22. IGN 5 A: Gauges and meters, charging
system, SRS airbag system, seat belt
pretensioners, multiport fuel injection
system/sequential multiport fuel injec-
tion system
23. STOP 15 A: Stop lights, cruise control
system, high−mounted stoplight, tail
lights
24. TAIL 10 A: Parking lights, front side
marker lights, license plate lights, tail
lights
25. PWR−VENT 15 A: Power rear quarter
windows
26. OBD 7.5 A: On−board diagnosis sys-
tem
27. PWR−OUTLET 15 A: Power outlet
28. STARTER 5 A: Gauges and meters,
SRS airbag system, seat belt preten-
sioners, multiport fuel injection system/
sequential multiport fuel injection sys-
tem
29. DOOR 20 A: Power door lock system,
theft deterrent system
30. PANEL 7.5 A: Gauge and meter, car
audio system, clock, air conditioning
system, instrument panel light control,
rear window defogger, electronically
controlled automatic transmission sys-
tem, emergency flashers, parking lights31. TURN 7.5 A: Turn signal lights, emer-
gency flashers
32. RADIO NO.2 7.5 A: Car audio system
33. CIG 15 A: Cigarette lighter, clock, pow-
er rear view mirror controls, SRS air-
bag system, seat belt pretensioners,
back−up lights, theft deterrent system
34. A/C 5 A: Air conditioning system
35. A/F HTR 25 A: EFI system
Fuses (type B)
36. CDS FAN 40 A: Electric cooling fans
37. RDI FAN 40 A: Electric cooling fans
38. CDS FAN 30 A: Electric cooling fans
39. RDI FAN 30 A: Electric cooling fans
40. MAIN 40 A: “DRL”, “H−LP RH” and
“H−LP LH” fuses
41. R/R A/C 40 A: Rear air conditioning
system
42. HTR 50 A: Air conditioning system
43. DEF 30 A: Rear window defogger,
“MIRROR−HEATER” fuse
44. AM1 40 A: “INP” fuse
45. PWR 30 A: Power windows, electric
moon roof, power seat, power sliding
door, “PWR−VENT” fuseFuses (type C)
46. ALT 140 A: Charging system, “FL
ABS”, “INP”, “HTR” and “R/R A/C”
fuses
47. INP 100 A: “AM1” and “DEF” fuses
48. FL ABS 60 A: Anti−lock brake system
ProCarManuals.com