air condition TOYOTA SIENNA 2006 XL20 / 2.G Service Manual

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1. Reduce your speed gradually,keeping a straight line. Move cau-
tiously off the road to a safe place
well away from the traffic. Avoid
stopping on the center divider of
a highway. Park on a level spot
with firm ground.
2. Stop the engine and turn on your emergency flashers.
3. Firmly set the parking brake and put the transmission in “P”.
4. Have everyone get out of the ve- hicle on the side away from traffic.
5. Read the following instructions thoroughly.
NOTICE
Do not continue driving with a
deflated tire. Driving even a
short distance can damage a
tire and wheel beyond repair.
COMPACT SPARE TIRE
The compact spare tire is designed
for temporary emergency use only.
The compact spare tire is identified
by the distinctive wording
“TEMPORARY USE ONLY” molded
into the side wall of the tire.
The compact spare tire saves space
in your luggage compartment, and its
lighter weight helps to improve fuel
economy and permits easier installa-
tion in case of a flat tire. The compact spare tire can be used
many times, if necessary. It has tread
life of up to 4800 km (3000 miles) de-
pending on road conditions and your
driving habits. When tread wear indi-
cators appear on the tire, replace the
tire.
See also the tire information on page
471 in Section 7−
2 for details on the
tread wear indicators and other ser-
vice information.CAUTION
 The compact spare tire was de-
signed especially for your To-
yota. Do not use it on any other
vehicle.
 Do not use more than one com-
pact spare tire at the same
time.
 The pressure for the compact
spare tire must be 420 kPa (4.2
kgf/cm
2 or bar, 60 psi).
 Do not exceed 80 km/h (50
mph) when driving with the
compact spare tire.
If you have a flat tire—
—Standard tires information

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Replace the compact spare tire
with the standard tire as soon
as possible.
 Avoid sudden a cceleration,
sudden d eceleration and sharp
turns with the compact spare
tire.
NOTICE
Your ground clearance is re-
duced when the compact spare
tire is installed so avoid driving
over obstacles and drive slowly
on rough, unpaved roads and
speed bumps. Also, do not at-
tempt to go through an auto-
matic car wash as the vehicle
may get caught, resulting in
damage.
Some vehicles are equipped with
runflat (RFT) tires. The runflat
tire allows you to continue driving
for up to 160 km (100 miles) at a
speed below 90 km/h (55 mph)
even if any tire goes flat. However,
in some conditions (such as high
temperatures), you could not con-
tinue driving for up to 160 km (100
miles).
A spare tire is not provided on ve-
hicles with runflat tires. When the tire goes flat or when the
tire pressure is below 100 kPa (1.0
kgf/cm
2 or bar, 15 psi), the tire
must be replaced. If you are not
sure, consult your Toyota dealer.
Do not use the repaired tire.
There is an “RFT” or “DSST” mark on
the sidewall of the run −flat tire.
For details about the run −flat tire, see
“Run −flat tires” on page 476 in Sec-
tion 7 −2.
—Runflat tires information

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CAUTION
As the runflat tire allows you to
continue driving if any tire goes
flat, the tire performance is not
the same as normal condition. If
the runflat tire goes flat, take
your vehicle to the nearest Toyo-
ta dealer or authorized tire dealer
as soon as possible, observing
the following instructions:
Decelerate as soon as possible
to the lowest appropriate
speed that conditions permit.
Do not drive for longer than
160 km (100 miles) or over 90
km/h (55 mph).
 Avoid abrupt steering wheel
maneuvering and braking. If
t h e veh i cl e ti res det eri o rat e,
you could lose control of the
steering wheel or the brakes,
causing death or serious inju-
ry.
Do not replace or repair the tire
by yourself. When the tires
must be replaced or repaired,
consult your Toyota dealer or
authorized tire dealer.NOTICE
 Take due care not to go over
a curb stone and be careful
of holes in the road because
deflated tire pressure affects
tire cushion performance.
The wheels, tires, body, sus-
pension and other compo-
nents could be damaged.
 Your ground clearance is re-
duced if the runflat tire
goes flat, so avoid driving
over obstacles and drive
slowly on rough, unp aved
roads and speed bumps.
Also, do not attempt to go
through an automatic car
wash as the vehicle may get
caught, resulting in damage.

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Toyota, through the diligent research, de-
sign and use of the most advanced
technology available, helps prevent corro-
sion and provides you with the finest qual-
ity vehicle construction. Now, it is up to
you. Proper care of your Toyota can help
ensure long −term corrosion prevention.
The most common causes of corrosion
to your vehicle are:
The accumulation of road salt, dirt and
moisture in hard −to −reach areas under
the vehicle.
Chipping of paint, or undercoating
caused by minor accidents or by
stones and gravel.
Care is especially important if you live
in particular areas or operate your ve-
hicle under certain environmental condi-
tions:
Road salt or dust control chemicals will
accelerate corrosion, as will the pres-
ence of salt in the air near the sea −
coast or in areas of industrial pollution.
High humidity accelerates corrosion es-
pecially when temperatures range just
above the freezing point.
Wetness or dampness to certain parts
of your vehicle for an extended period
of time, may cause corrosion even
though other parts of the vehicle may
be dry.
High ambient temperatures can cause
corrosion to those components of the
vehicle which do not dry quickly due to
lack of proper ventilation.
The above signifies the necessity to keep
your vehicle, particularly the underside, as
clean as possible and to repair any dam-
age to paint or protective coatings as
soon as possible.
To help prevent corrosion on your
Toyota, follow these guidelines:
Wash your vehicle frequently. It is, of
course, necessary to keep your vehicle
clean by regular washing, but to prevent
corrosion, the following points should be
observed:
If you drive on salted roads in the
winter or if you live near the ocean,
you should hose off the undercarriage
at least once a month to minimize cor-
rosion.
High pressure water or steam is effec-
tive for cleaning the vehicle’s underside
and wheel housings. Pay particular
attention to these areas as it is difficult
to see all the mud and dirt. It will do
more harm than good to simply wet the
mud and debris without removing. The
lower edge of doors, rocker panels and
frame members have drain holes which
should not be allowed to clog with dirt
as trapped water in these areas can
cause corrosion.
Wash the underside of the vehicle thor-
oughly when winter is over.
See “Washing and waxing your Toyota” on
page 445 in this Section for more tips.
Check the condition of your vehicle’s
paint and trim. If you find any chips or
scratches in the paint, touch them up im-
mediately to prevent corrosion from start-
ing. If the chips or scratches have gone
through the bare metal, have a qualified
body shop make the repair.
Protecting your Toyota from
corrosion

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Carpets
Use a good foamtype shampoo to
clean the carpets.
Begin by vacuuming thoroughly to remove
as much dirt as possible. Several types of
foam cleaners are available; some are in
aerosol can sand others are powders or
liquids which you mix with water to pro-
duce a foam. To shampoo the carpets,
use a sponge or brush to apply the foam.
Rub in overlapping circles.
Do not apply water—the best results are
obtained by keeping the carpet as dry as
possible. Read the shampoo instructions
and follow them closely.
Seat belts
The seat belts may be cleaned with
mild soap and water or with lukewarm
water.
Use a cloth or sponge. As you are clean-
ing, check the belts for excessive wear,
fraying, or cuts.
NOTICE
Do not use dye or bleach on the
belts—it may weaken them.
 Do not use the belts until they be-
come dry.
Windows
The windows may be cleaned with any
household window cleaner.
NOTICE
When cleaning the inside of the
rear window, be careful not to
scratch or damage the heater wires
or connectors.
 With onglass antenna: When clean-
ing the inside of the rear window,
be careful not to scratch or damage
the printed antenna.
Air conditioning control panel, audio
panel, instrument panel, console panel,
and switches
Use a soft damp cloth for cleaning.
Soak a clean soft cloth in water or luke-
warm water then lightly wipe off dirt.
NOTICE
Do not use organic substances (sol-
vents, kerosene, alcohol, gasoline,
etc.) or alkaline or acidic solutions.
These chemicals can cause discol-
oring, staining or peeling of the
surface.
 If you use cleaners or polishing
agents, make sure their ingredients
do not include the substances men-
tioned above.
 If you use a liquid car freshener, do
not spill the liquid onto the ve-
hicle’s interior surfaces. It may con-
tain the ingredients mentioned
above. Immediately clean any spill
using the method mentioned above.

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Tire inflation pressure
Check the pressure with a gauge ev-
ery two weeks, or at least once a
month. See page 471 in Section 7−2
for additional information.
Tire surface and wheel nuts
Check the tires carefully for cuts,
damage or excessive wear. See page
474 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 476 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 pedal; pedal almost
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?

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If you perform maintenance by yourself,
be sure to follow the correct procedure
given in this Section.
You should be aware that improper or in-
complete servicing may result in operating
problems.
Performing do−it−yourself maintenance
during the warranty period may affect your
warranty coverage. Read the separate
Toyota Warranty statement for details and
suggestions.
This Section gives instructions only for
those items that are relatively easy for an
owner to perform. As explained in Section
6, there are still a number of items that
must be done by a qualified technician
with special tools.
For information on tools and Sections for
do− it−yourself maintenance, see “Parts
and tools” on page 463 in this Section.
Utmost care should be taken when work-
ing on your vehicle to prevent accidental
injury. Here are a few precautions that
you should be especially careful to ob-
serve:CAUTION
When the engine is running, keep
hands, clothing, and tools away
from the moving fan and engine
drive belts. (Removing rings,
watches, and ties is advisable.)
Right after driving, the engine
compartment—the engine, radiator,
exhaust manifold and spark plug
boots, etc.—will be hot. So be care-
ful not to touch them. Oil, fluids
and spark plugs may also be hot.
If the engine is hot, do not remove
the radiator cap or loosen the drain
plugs to prevent burning yourself.
Do not leave anything that may
burn easily, such as paper or rags,
in the engine compartment.
Do not smoke, cause sparks or al-
low open flames around fuel or the
battery. Their fumes are flammable.
Do not get under your vehicle with
just the body jack supporting it. Al-
ways use automotive jack stands or
other solid supports.
Be sure that the ignition is off if
you work near the electric cooling
fans or radiator grille. With the
ignition on, the electric cooling fans
will automatically start to run if the
engine coolant temperature is high
and/or the air conditioning is on.
Use eye protection whenever you
work on or under your vehicle
where you may be exposed to flying
or falling material, fluid spray, etc.
Used engine oil contains potentially
harmful contaminants which may
cause skin disorders such as in-
flammation or skin cancer, so care
should be taken to avoid prolonged
and repeated contact with it. To re-
move used engine oil from your
skin, wash thoroughly with soap
and water.
Do not leave used oil within the
reach of children.
Dispose of used oil and filter only
in a safe and acceptable manner.
Do not dispose of used oil and fil-
ter in household trash, in sewers or
onto the ground. Call your dealer or
a service station for information
concerning recycling or disposal.
Doityourself service
precautions

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When the tire goes flat or when the
tire pressure is below 100 kPa (1.0
kgf/cm
2 or bar, 15 psi), the tire
must be replaced. If you are not
sure, consult your Toyota dealer.
Do not use the repaired tire.
There is an “RFT” or “DSST” mark on
the sidewall of the run −flat tire.
If you cannot distinguish between the
standard tire and run −flat tire, consult
your Toyota dealer.
The tire warranty book provides de-
tailed information on the run −flat tires.
For details, see the tire warranty
book.
CAUTION
 Do not use nongenuine
wheels, as this may cause dan-
gerous handling characteris-
tics resulting in loss of control.
 Do not use the runflat tires
equipped on your vehicle on
another model. These tires are
especially for this model.
Do not mix runflat tires with
standard tires.
If the tire pressure warning light
co mes on :
Decelerate at a speed below 90
km/h (55 mph), then adjust the tire
pressure to the specified level as
soon as possible. Do not drive
more than 160 km (100 miles).
 When the tire pressure is below
140 kPa (1.4 kgf/cm
2 or bar, 20
psi), consult your Toyota deal-
er. If the tire is flat or the tire
pressure is below 100 kPa (1.0
kgf/cm
2 or bar, 15 psi), the tire
must be replaced. Do not use
the repaired tire.
 When the tire pressure is 140
kPa (1.4 kgf/cm
2 or bar, 20 psi)
or more, adjust it to specified
level. (See “Tires” on page 501
in Section 8.) S ee “ Ti r e p r es s ur e
warning system”
on page 208 in Section 1 −7 and
“Checking tire infl at ion pr es s ur e” on
page 471 in this Section.
CAUTION
As the runflat tire allows you to
continue driving if any tire goes
flat, the tire performance is not
the same as normal condition. If
the runflat tire goes flat, take
your vehicle to the nearest Toyo-
ta dealer or authorized tire dealer
as soon as possible, observing
the following instructions:
 Decelerate as soon as possible
to the lowest appropriate
speed that conditions permit.
Do not drive for longer than
160 km (100 miles) or over 90
km/h (55 mph).

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Instrument panel (driver’s side)
Fuses (type A)1. ETCS 10 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system
2. EFI NO. 1 20 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system, “EFI NO. 2” fuse
3. HLP RL 15 A: Right−hand headlight
(low beam)
4. DRL 20 A: Daytime running light sys-
tem, “H −LP RH” and “H −LP LH” fuses
5. ALTS 7.5 A: Charging system
6. HLP LL 15 A: Left−hand headlight
(low beam), front fog lights
Instrument panel (passenger’s side)
7. DOOR NO. 2 25 A: Power door lock
system
8. HAZ 15 A: Turn signal lights, emergen-
cy flashers
9. RAD NO. 3 30 A: Audio system
10. A/F 25 A: Multiport fuel injection sys-
tem/sequential multiport fuel injection
system
11. HORN 10 A: Horns
12. EFI NO. 2 10 A: Multiport fuel injection
system/se quential multiport fuel injec-
tion system 13. DOME 10 A:
Personal lights, vanity
lights, door courtesy lights, luggage
compartment light, ignition switch light,
multi −information display
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, rear
seat entertainment 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 entertainment
system
24. MIR HTR 10 A: Outside rear view mir-
ror heaters
25. RAD2 7.5 A: Audio system, navigation
system, rear seat entertainment system
26. PWR OUTLET 15 A: Power outlets
27. CIG 15 A: Cigarette lighter

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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 (115 V), power
third seat, driving position memory sys-
tem
39. PANEL 10 A: Air conditioning system,
seat heaters, audio system, navigation
system, power sliding door, power back
door, multi −information display, rear
window 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 (115 V)
43. FR DEF 15 A: Windshield wiper de−
icer 44. AM1 7.5 A:
Multiport fuel injection sys-
tem/sequential multiport fuel injection
system, starter system
45. STOP 10 A: Stop/tail lights, high
mounted stoplight, shift lock control
system, anti −lock brake system, trac-
tion control system, vehicle stability
control system, multiport fuel injection
system/s equential multiport fuel injec-
tion system, multiplex communication
system
46. P/W 25 A: Power windows, power rear
view mirror
47. OBD 7.5 A: On−board diagnosis sys-
tem
48. FOG 15 A: Front fog lights
49. P/VENT 15 A: Power quarter windows
50. ST 7.5 A: Multiport fuel injection sys-
tem/sequential multiport fuel injection
system
51. A/C 7.5 A: Manual air conditioning sys-
tem
Fuses
(type B)
52. MAIN 30 A: Headlights, daytime run-
ning light system, “H −LP RL” and “H −
LP LL” fuses
53. AM2 30 A: “INJ”, “IGN” and “GAUGE2”
fuses