2012 TOYOTA SIENNA flat tire

When trouble arises5
721
SIENNA_U (OM45477U)
5-1. Essential informationEmergency flashers ......... 722
If your vehicle needs to be towed ............................. 723
If you think something is wrong ............................. 727
Fuel pump shut off system ........................... 728 5-2. Steps to take in an
emergency
If a warning light turns on or a warning buzzer
sounds... ........................ 729
If a warning message is displayed ........................ 744
If you have a flat tire (vehicles with run-flat
tires) ............................... 745
If you have a flat tire (vehicles with standard
tires) ............................... 747
If the engine will not start ................................ 762
If the shift lever cannot be shifted from P ................. 764
If you lose your keys ........ 766
If the electronic key does not operate properly....... 767
If the battery is discharged ..................... 770
If your vehicle overheats .. 775
If the vehicle becomes stuck .............................. 778
If your vehicle has to be stopped in an
emergency ..................... 780

5
When trouble arises
727
5-1. Essential information
SIENNA_U (OM45477U)
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably
needs adjustment or repair. Contact your Toyota dealer as soon as
possible.
■ Visible symptoms
●Fluid leaks under the vehicle
(Water dripping from the air cond itioning after use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temperature g auge needle continually points
higher than normal
■ Audible symptoms
●Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
■ Operational symptoms
●Engine missing, stumbling or running rough
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, s pongy feeling, pedal almost
touches the floor

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.

738 5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
■If the malfunction indicator lamp comes on while driving
First check the following:
● Is the fuel tank empty?
If it is, fill the fuel tank immediately.
● Is the fuel tank cap loose?
If it is, tighten it securely.
The malfunction indicator lamp will go off after taking several driving trips.
If the malfunction indicator lamp does not go off even after several trips, con-
tact your Toyota dealer as soon as possible.
■
When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level.
Pushing the tire pressure warning reset switch will not turn off the tire
pressure warning light.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such
as natural air leaks and tire inflat ion pressure changes caused by tem-
perature. In this case, adjusting the tire inflation pressure will turn off the
warning light (after a few minutes).
■When a tire is replaced with a spare tire (vehicles with compact
spare tire)
The compact spare tire is not equipped with a tire pressure warning
valve and transmitter. If a tire goes flat, the tire pressure warning light will
not turn off even though the flat tire has been replaced with the spare
tire. Replace the spare tire with the re paired tire and adjust the tire infla-
tion pressure. The tire pressure wa rning light will go off after a few min-
utes.

5
When trouble arises
741
5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
CAUTION
■When the electric power steering system warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than usual when operating, hold
firmly and operate using more force than usual.
■If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could
cause loss of vehicle control and result in death or serious injury.
●Vehicles with standard tires:
• Stop your vehicle in a safe place as soon as possible. Adjust the
tire inflation pressure immediately.
• If the tire pressure warning light comes on even after tire inflation pressure adjustment, it is probable that you have a flat tire. Check
the tires. If a tire is flat, change it with the spare tire and have the
flat tire repaired by the nearest Toyota dealer.
• Avoid abrupt maneuvering and brak ing. If the vehicle tires deterio-
rate, you could lose control of th e steering wheel or the brakes.
●Vehicles with run-flat tires:
• Decelerate to the lowest appropr iate speed as soon as possible.
Do not drive over 55 mph (90 km/h).
• Check and adjust the tire inflation pressure immediately.
• If the tire pressure warning light comes on even after tire inflation pressure adjustment, it is probable that you have a flat tire. Have
the tire replaced by the nearest Toyota dealer.
• Avoid abrupt maneuvering and brak ing. If the vehicle tires deterio-
rate, you could lose control of th e steering wheel or the brakes.

742 5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
CAUTION
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.
■Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly
when cold and inflated to the inflation pressure recommended by the
vehicle manufacturer on the vehicle placard or tire inflation pressure
label (tire and load information label). (If your vehicle has tires of a differ-
ent size than the size indicated on the vehicle placard or tire inflation
pressure label [tire and load information label], you should determine the
proper tire inflation pr essure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire
pressure monitoring system (TPMS-ti re pressure warning system) that
illuminates a low tire pressure telltal e (tire pressure warning light) when
one or more of your tires is significantly under-inflated. Accordingly,
when the low tire pressu re telltale (tire pressure warning light) illumi-
nates, you should stop and check your tires as soon as possible, and
inflate them to the proper pressure. Driving on a significantly under-
inflated tire causes the tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel effi ciency and tire tread life, and may
affect the vehicle’s handling and stopping ability.
Please note that the TPMS (tire pressure warning system) is not a sub-
stitute for proper tire main tenance, and it is the driver’s responsibility to
maintain correct tire pressure, even if under-inflation has not reached the
level to trigger illu mination of the TPMS low tire pressure telltale (tire
pressure warning light).

5
When trouble arises
745
5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
If you have a flat tire (vehicles with run-flat tires)
■In some condition (such as at high temperatures)
You cannot continue driving for up to 100 miles (160 km).
■For the detailed information on run-flat tires
See the tire warranty booklet.
You can continue driving a vehicle with run-flat tires even if any
tire goes flat.
In this case, slow down and drive with extra caution.
■Run-flat tires (A “RFT” or “DSST” mark is molded on the
sidewall)
Take your vehicle to the near-
est Toyota dealer or autho-
rized tire dealer as soon as
possible if any tire goes flat.
The vehicle can be driven for
a maximum of 100 miles
(160 km) at a speed below 55
mph (90 km/h) after the tire
pressure warning light comes
on. (P. 733)

746 5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
NOTICE
■When replacing the tires
When removing or fitting the wheels, tires or the tire pressure warning
valve and transmitter, contact your Toyota dealer as the tire pressure
warning valve and transmitter may be damaged if not handled correctly.
■When driving over bumps
If a vehicle has a flat tire, the ve hicle height will be lower than usual.
Ensure that nothing strikes the bottom of the vehicle.
■To avoid damaging the tire pressure warning valves and transmit-
ters
Do not use liquid sealants on flat tires.