2005 TOYOTA SIENNA traction control

05 SIENNA_U (L/O 0409)
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2005 SIENNA from Sep. ’04 Prod. (OM45431U)
Spark ignition system of yourTo y o t a
The spark ignition system in your Toyota meets all require-
ments of the Canadian Interference −Causing Equipment
Standard.
Installation of a mobile twoway radio system
As the installation of a mobile two −way radio system in
your vehicle could affect electronic systems such as
multiport fuel injection system/sequential multiport fuel
injection system, electronic throttle control system, cruise
control system, dynamic laser cruise control system, anti −
lock brake system, traction control system, vehicle stability
control system, SRS airbag system and seat belt preten-
sioner system, be sure to check with your Toyota dealer
for precautionary measures or special instructions regard-
ing installation.
Tires and loading on your To y o t a
Underinflated or overinflated tire pressure and the
excess load may result in the deterioration of
steering ability and braking ability, leading to an
accident. Check the tire inflation pressure periodi-
cally and be sure to keep the load limits given in
this Owner ’s Manual. For details about tire inflation
pressure and load limits, see pages 398 and 471.

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2005 SIENNA from Sep. ’04 Prod. (OM45431U)
Brake system warning light∗1or
Driver ’s seat belt reminder light∗1
or Malfunction indicator lamp∗1
Discharge warning light∗1
Low engine oil pressure warning light∗1
or Anti −lock brake system warning light∗
1
Open door warning light∗1
SRS warning light∗1
Low windshield washer fluid level warning
light∗1
Low tire pressure warning light∗1
Front passenger ’s seat belt reminder light∗1
Vehicle stability control system/traction control
system warning light∗1
Engine oil replacement reminder light∗1
(for vehicles sold in U.S.A.)
Indicator symbols on the instrument panel

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2005 SIENNA from Sep. ’04 Prod. (OM45431U)
Cruise control indicator light∗2 or dynamic laser
cruise control indicator light∗ 3
Automatic transmission indicator lights Headlight high beam indicator light
∗1: For details, see “Service reminder indicators and warning
buzzers” on page 175 in Section 1 −6.
∗
2: If this light flashes, see “Cruise control” on page 201 in
Section 1 −7.
∗
3: If this light flashes, see “Dynamic laser cruise control” on
page 203 in Section 1 −7.
Slip indicator light
Traction control system off indicator light
(two −wheel drive models)
Turn signal indicator lights
Dynamic laser cruise control ready mode
indicator light
Conventional cruise control mode indicator light
Engine immobilizer/theft deterrent system
indicator light
“AIRBAG ON” indicator light
“AIRBAG OFF” indicator light

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2005 SIENNA from Sep. ’04 Prod. (OM45431U)
Vehicles with the vehicle stability con-
trol system—
The light comes on when the ignition key
is turned to the “ON” position. If the anti−
lock brake system and the brake assist
system works pr operly, the light turns off
after a few seconds. Thereafter, if the
system malfunctions, the light comes on
again.
When the “ABS” warning light is on (and
the brake system warning light is off), the
anti −lock brake system, the brake assist
system, the traction control system and
the vehicle stability control system do not
operate, but the brake system still oper-
ates conventionally.
When the “ABS” warning light is on (and
the brake system warning light is off), the
anti −lock brake system does not operate
so that the wheels could lock up during
a sudden braking or braking on slippery
road surfaces. If either of the following conditions
occurs, this indicates a malfunction
somewhere in the components moni-
tored by the warning light system. Con-
tact your Toyota dealer as soon as
possible to service the vehicle.
The light does not come on when the
ignition key is turned to the “ON” posi-
tion, or remains on.
The light comes on while you are driv-
ing.
A warning light turning on briefly during
operation does not indicate a problem.
CAUTION
If the “ABS” warning light remains on
together with the brake system warn-
ing light, immediately stop your ve-
hicle at a safe place and contact your
Toyota dealer.
In this case, not only the antilock
brake system will fail but also the
vehicle will become extremely unsta-
ble during braking.
(i) Open Door Warning Light
This light remains on until all the doors
are completely closed.
(j) SRS Warning Light
This light will come on when the igni-
tion key is turned to the “ON” position.
After about 6 seconds, the light will go
off. This means the system of the air-
bag and front seat belt pretensioners
are operating properly.
The warning light system monitors the air-
bag sensor assembly, front airbag sen-
sors, side and curtain shield airbag sensor
assemblies, curtain shield airbag sensor
assemblies, driver ’s seat position sensor,
driver’s seat belt buckle switch, front pas-
senger occupant classification system,
“AIRBAG ON” indicator light, “AIRBAG
OFF” indicator light, front passenger ’s seat
belt buckle switch, seat belt pretensioner
assemblies, inflators, interconnecting wir-
ing and power sources.
If either of the following conditions occurs,
this indicates a malfunction somewhere in
the parts monitored by the warning light
system. Contact your Toyota dealer as
soon as possible to service the vehicle.

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2005 SIENNA from Sep. ’04 Prod. (OM45431U)
The light does not come on when the
ignition key is turned to the “ON” posi-
tion or remains on for more than 6
seconds or flashes.
The light comes on or starts flashing
while driving.
(k) “VSC” Warning Light
This light warns that there is a problem
somewhere in the vehicle stability control
system or traction control system.
The light will come on when the ignition
key is turned to “ON” and will go off after
a few seconds.
If the light comes on while driving, the
system does not work. However, as con-
ventional braking operates when applied,
there is no problem to continue your driv-
ing.
In the following cases, contact your Toyota
dealer:
The warning light does not come on
after the ignition key is turned to “ON”.
The warning light remains on after the
ignition key is turned to “ON”.
The warning light comes on while driv-
ing. Tw o
−wheel drive models only—The “TRAC
OFF” indicator light will come on when the
“VSC” warning light comes on even if the
“TRAC OFF” switch is not pushed.
(l) Low Tire Pressure Warning Light
This light warns that the tire pressure of
any one of the tires is critically low. The
light comes on when the ignition key is
turned to the “ON” position. It goes off
after a few seconds. This indicates that
the low tire pressure warning system is
functioning properly.
If the light comes on while driving, adjust
tire inflation pressure to the specified lev-
el. (See “Tires” on page 499 in Section 8.)
After the tire inflation pressure is adjusted,
the light should go off after driving at
least 30 km/h (19 mph) for some time. If
the light still remains or blinks once every
second, have the low tire pressure warn-
ing system checked at your Toyota dealer.
If the light blinks twice every second, the
low tire pressure warning system needs to
be initialized.
For details, see “Tire pressure warning
system” on page 196 in Section 1 −7. (m) Low Windshield Washer Fluid Level
Warning Light
The light warns that the windshield washer
fluid level is too low. Add washer fluid at
your earliest opportunity. (For instructions,
see “Adding washer fluid” on page 487 in
Section 7 −3.)
(n) Engine Oil Replacement Reminder Light (for vehicles sold in U.S.A.)
This light acts as a reminder to replace
the engine oil.
This light will come on when the ignition
key is turned to “ON” and will go off after
about a few seconds.
When you drive for about 8000 km (5000
miles) after the engine oil replacement,
this light illuminates for about 3 seconds
and then flashes for about 12 seconds
with the ignition key turned to the “ON”
position. If you continue driving without
replacing the engine oil, and if the dis-
tance driven exceeds 12000 km (7500
miles), the light will come on after the
ignition key is turned to “ON” position.
The light will remain on thereafter.
If the light is flashing, we recommend that
you replace the engine oil at an early
opportunity depending on the driving and
road conditions. If the light comes on,
replace it as soon as possible.

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2005 SIENNA from Sep. ’04 Prod. (OM45431U)
OPERATION OF INSTRUMENTS AND
CONTROLS
Ignition switch, Transmission and Parking brake
Ignition switch with steering lock186
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic transmission 187
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.
Traction control system 191
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. .
Vehicle stability control system 195
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire pressure warning system 196
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Parking brake 200
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . .
Cruise control 201
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . .
Dynamic laser cruise controll 203
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SECTION 1 7

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2005 SIENNA from Sep. ’04 Prod. (OM45431U)
The traction control system automatical-
ly helps prevent the spinning of front
wheels when the vehicle is started or
accelerated on slippery road surfaces.
When the ignition key is turned to “ON”,
the system automatically turns on.
CAUTION
Under certain slippery road condi-
tions, full traction of the vehicle and
power against front wheels cannot be
maintained, even though the traction
control system is in operation. Do not
drive the vehicle under any speed or
maneuvering conditions which may
cause the vehicle to lose traction
control. In situations where the road
surface is covered with ice or snow,
your vehicle should be fitted with
snow tires or tire chains. Always
drive at an appropriate and cautious
speed for the present road condi-
tions.
NORMAL DRIVING MODE
Leave the system on during the ordi-
nary driving so that it can operate
when needed.
You may hear a sound in the engine
compartment for a few seconds just after
the vehicle begins to move. This means
that the traction control system is in the
self−check mode, but does not indicate a
malfunction. When the traction control system is oper-
ating, the following conditions occur:
The system controls the spinning of the
front wheels. At this time, the slip indi-
cator light blinks.
You may feel vibration or noise in your
vehicle, caused by operation of the
brakes. This indicates the system is
functioning properly.
The slip indicator light comes on for a few
seconds when the ignition key is turned
to “ON”. If the indicator light does not
come on when the ignition is turned on,
contact your Toyota dealer.
Traction control system
(twowheel drive models)

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2005 SIENNA from Sep. ’04 Prod. (OM45431U)
TRACTION CONTROL OFF MODE
If your wheels get stuck in a ditch
when you are driving on a severe off
road and sand, turn off the traction
control system. This system that con-
trols engine performance interferes with
the process of freeing your wheels.
To turn off: Push “TRAC OFF” switch.
The “TRAC OFF” indicator light will come
on.
The vehicle stability control system is al-
ways activated, even if the traction control
system is turned off.
To turn on: Push “TRAC OFF” switch
once again.
The “TRAC OFF” indicator light will go off.“TRAC OFF” indicator light comes on for
a few seconds when the ignition key is
turned to “ON”. It will come on again
when you push the “TRAC OFF” switch to
turn off the system.
In the following cases, contact your Toyota
dealer:
The indicator light does not come on
when the ignition key is turned “ON”.
The indicator light remains on after the
ignition is turned on.
The indicator light comes on with the
normal driving mode while driving.
“VSC” warning light
This light warns that there is a problem
somewhere in the traction control system
or the vehicle stability control system.
The light will come on when the ignition
key is turned to “ON” and will go off after
a few seconds.
If the light comes on while driving, the
system does not work. However, as con-
ventional braking operates when applied,
there is no problem to continue your driv-
ing.