2012 TOYOTA SIENNA Owners Manual

5
When trouble arises
729
SIENNA_U (OM45477U)
5-2. Steps to take in an emergency
If a war ning light turns on or a war ning buzzer sounds...
Stop the vehicle immediately. Continuing to drive the vehicle
may be dangerous.The following warning indicates a possible problem in the brake sys-
tem. Immediately stop the vehicle in a safe place and contact your
Toyota dealer.
*: Parking brake engaged warning buzzer: A buzzer will sound if the vehicle is driven at a speed of approximately 3 mph (5 km/h) or more.
Warning lightWarning light/Details
(U.S.A.)
(Canada) Brake system warning light (warning buzzer)
*
• Low brake fluid
• Malfunction in the brake system
This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released, the system is operating normally.
Calmly perform the following actio
ns if any of the warning lights
comes on or flashes. If a light comes on or flashes, but then goes
off, this does not necessarily indicate a malfunction in the system.
However, if this continues to o ccur, have the vehicle inspected by
your Toyota dealer.

730 5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
Stop the vehicle immediately.The following warnings indicate the possibility of damage to the vehi-
cle that may lead to an accident. Immediately stop the vehicle in a
safe place and contact your Toyota dealer.
Have the vehicle inspected immediately.Failure to investigate the cause of the following warnings may lead to
the system operating abnormally and possibly cause an accident.
Have the vehicle inspected by your Toyota dealer immediately.
Warning lightWarning light/Details
Charging system warning light Indicates a malfunction in the vehicle’s charging system
Low engine oil pressure warning light Indicates that the engine oil pressure is too low
Warning lightWarning light/Details
(U.S.A.)
(Canada) Malfunction indicator lamp
Indicates a malfunction in:
• The electronic engine control system;
• The electronic throttle control system; or
• The electronic automatic transaxle control system
SRS warning light Indicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system

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When trouble arises
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5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
Warning lightWarning light/Details
(U.S.A.)
(Canada) “ABS” warning light
Indicates a malfunction in:
• The ABS; or
• The brake assist system
Electric power steering system warning light
Indicates a malfunction in the EPS (Electric Power Steer-
ing) system
(comes on or flashes) Pre-collision system warni
ng light (if equipped)
Indicates a malfunction in the pre-collision system
The warning light will operate as follows, even when the
system is not malfunctioning:
• The light will flash quickly when the system is operating. (P. 336)
• The light will turn on when the pre-collision braking is dis- abled. ( P. 337)
• The light will turn on when the system cannot temporarily be used.
Slip indicator light Indicates a malfunction in:
• Enhanced VSC
•TRAC
The indicator will blink when the system listed above is
operational. ( P. 328)

732 5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
Warning lightWarning light/Details
(Flashes) Automatic High Beam indi
cator light (if equipped)
Indicates a malfunction in the Automatic High Beam sys-
tem ( P. 273)
(Flashes) Cruise control indicator
light (if equipped)
Indicates a malfunction in the cruise control system
( P. 293, 298)
(Flashes) Radar cruise control indicator light (if equipped)
Indicates a malfunction in the Dynamic radar cruise control
system ( P. 298)

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When trouble arises
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5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
Follow the correction procedures.
After taking the specified steps to correct the suspected problem,
check that the warning light turns off.
Warning lightWarning light/DetailsCorrection procedure
Open door warning light
(warning buzzer)
*1
Indicates that a door is not
fully closed. Check that all the doors are
closed.
Low fuel level warning
light Indicates remaining fuel is
approximately 3.0 gal.
(11.4 L, 2.5 Imp.gal.) or
less Refuel the vehicle.
Driver’s seat belt
reminder light
(warning buzzer)
*2
Warns the driver to fasten
his/her seat belt. Fasten the seat belt.
(on the center panel) Front passenger’s seat
belt reminder light
(warning buzzer)
*2
Warns the front passen-
ger to fasten his or her
seat belt.
Fasten the seat belt.
Master warning light A buzzer sounds and the
warning light comes on
and flashes to indicate that
the master warning system
has detected a malfunc-
tion. P. 744

734 5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
Warning lightWarning light/DetailsCorrection procedure
Tire pressure warning
light
When the light comes on:
Low tire inflation pressure
such as
• Natural causes (P. 738)
• Flat tire ( P. 745, 747) Adjust the tire inflation
pressure to the specified
level.
The light will turn off after
a few minutes. In case
the light does not turn off
even if the tire inflation
pressure is adjusted,
have the system checked
by your Toyota dealer.
When the light comes on
after blinking for 1 minute:
Malfunction in the tire
pressure warning system
(  P. 740) Have the system checked
by your Toyota dealer.
Low windshield washer
fluid warning light
Low level of washer fluid Fill the tank.

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When trouble arises
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5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
Warning lightWarning light/DetailsCorrection procedure
(U.S.A.) Maintenance required
reminder light
Indicates that mainte-
nance is requires accord-
ing to the driven distance
on the maintenance
schedule.
*3
Illuminates for about 3 sec-
onds and then flashes for
about 15 seconds approxi-
mately 4500 miles
(7200 km) after the mainte-
nance data has been reset. If necessary, perform main-
tenance.
Comes on and remains on if
the distance driven exceeds
5000 miles (8000 km) after
the maintenance data has
been reset. (The indicator
will not work property unless
the maintenance data has
been reset.) Perform the necessary
maintenance.
Please reset the mainte-
nance is performed.
(

P. 6 4 0)
Third seat warning light
(if equipped) Indicates that the third
seat operation is not yet
complete. Complete the third seat
operation.

736 5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
*1:Open door warning buzzer:A buzzer will sound if the vehicle reaches a speed of 3 mph (5 km/h) with any
door open.
*2:Driver’s and front passenger’s seat belt warning buzzers:The driver’s and front passenger’s seat belt warning buzzers sound to alert
the driver and front passenger that his or her seat belt is not fastened. The
buzzer sounds intermittently for 10 seconds after the vehicle has reached a
speed of 12 mph (20 km/h). Then, if the seat belt is still unfastened, the
buzzer will sound at a different tone for 20 more seconds.
*3:Refer to the separate “Scheduled Maintenance Guide” or “Owner’s ManualSupplement” for the maintenance interval applicable to your vehicle.
Warning lightWarning light/DetailsCorrection procedure
(AWD models) Active Torque Control
4WD system warning light
When the light blinks: The
system has been over-
loaded and front-wheel
drive has been automati-
cally engaged. Drop your speed or stop the
vehicle until the light stops
blinking. (Do not stop the
engine.)
When the light comes on:
Malfunction in the Active
Torque Control 4WD sys-
tem. Have the system checked
by your Toyota dealer.