Page 221 of 672

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2214-1. Before driving
4
Driving
■Maintenance
●If you tow a trailer, your vehicle will require more frequent maintenance due
to  the  additional  load.  (See  “Scheduled  Maintenance  Guide”  or  “Owner’s
Manual Supplement”.)
● Retighten the fixing bolts of the towing ball and bracket after approximately
600 miles (1000 km) of trailer towing.
■ If trailer sway occurs
One  or  more  factors  (crosswinds,  passing  vehicles,  rough  roads,  etc.)  can
adversely affect handling of your vehicle and trailer, causing instability.
●If trailer swaying occurs:
• Firmly grip the steering wheel. Steer straight ahead. 
Do not try to control trailer swaying by turning the steering wheel.
• Begin  releasing  the  accelerator  pedal  immediately  but  very  gradually  to reduce speed. 
Do not increase speed. Do not apply vehicle brakes.
If  you  make  no  extreme  correction  with  the  steering  or  brakes,  your  vehicle
and trailer should stabilize.
● After the trailer swaying has stopped:
• Stop in a safe place. Get all occupants out of the vehicle.
• Check the tires of the vehicle and the trailer.
• Check the load in the trailer. 
Make sure the load has not shifted. 
Make sure the tongue weight is appropriate, if possible.
• Check the load in the vehicle.  Make sure the vehicle is not overloaded after occupants get in.
If you cannot find any problems, the speed at which trailer swaying occurred
is beyond the limit of your particular vehicle-trailer combination. 
Drive  at  a  lower  speed  to  prevent  instability.  Remember  that  swaying  of  the
towing vehicle-trailer increases as speed increases. 
     
        
        Page 474 of 672

474
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7-2. Maintenance
Maintenance requirements
General maintenance should be performed on a daily basis. This can
be done by yourself or by a Toyota dealer.
Scheduled  maintenance  should  be performed  at  specified  intervals
according to the maintenance schedule.
For  details  about  maintenance  items  and  schedules,  refer  to  the  “Sched-
uled Maintenance Guide” or “Owner’s Manual Supplement”.
You can perform some maintenance procedures by yourself. 
Please be aware that do-it-yourself  maintenance may affect warranty
coverage.
The use of Toyota Repair Manuals is recommended.
For details about warranty coverage, see the separate “Owner’s Warranty
Information Booklet” or “Owner’s Manual Supplement”.
To ensure safe and economical driving, day-to-day care and reg-
ular maintenance are essential. It is the owner’s responsibility to
perform regular checks. Toyota recommends the following main-
tenance:
General maintenance
Scheduled maintenance
Do-it-yourself maintenance 
     
        
        Page 475 of 672

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4757-2. Maintenance
7
Maintenance and care
■Repair and replacement
It  is  recommended  that  genuine  Toyota  parts  be  used  for  repairs  to  ensure
performance of each system. If non-Toyota parts are used in replacement or if
a  repair  shop  other  than  a  Toyota  dealer  performs  repairs,  confirm  the  war-
ranty coverage.
■ Resetting the message indicating maintenance is required (U.S.A. only)
After  the  required  maintenance  is  preformed  according  to  the  maintenance
schedule, please reset the message.
To reset the message, follow the procedures described below:
Using the odometer and trip meter display
Turn the engine switch to the “LOCK” position (vehicles without a smart key
system) or off (vehicles with a smart key system) with the trip meter A read-
ing shown. ( P. 88)
While  pressing  the  odometer/trip  meter  display  change  button  ( P.  87),
turn  the  engine  switch  to  the  “ON”  position  (vehicles  without  a  smart  key
system) or IGNITION ON mode (vehicles with a smart key system) (do not
start the engine because otherwise the reset mode will be canceled).
Continue to press and hold the button until the trip meter displays “000000”
and the multi-information display indicates that the reset is complete.
Using the multi-information display (vehicles with color display)
While  the  engine  is  running,  switch  the  multi-information  display  to  the
“Settings” screen. ( P. 624)
Select “Maintenance Reset” on the “Settings” screen.
Select “Yes” on the “Maintenance Reset” screen.
“Maintenance Reset Complete” will be displayed on the multi-information dis-
play when the reset procedure has been completed.
■ Allow inspection and repairs to be performed by a Toyota dealer
●Toyota  technicians  are  well-trained  specialists  and  are  kept  up  to  date  with
the  latest  service  information.  They  are  well  informed  about  the  operations
of all systems on your vehicle.
● Keep  a  copy  of  the  repair  order.  It  proves  that  the  maintenance  that  has
been  performed  is  under  warranty  cove rage.  If  any  problem  should  arise
while  your  vehicle  is  under  warranty,  your  Toyota  dealer  will  promptly  take
care of it.
1
2
3
1
2
3 
     
        
        Page 479 of 672
SIENNA_OM_OM08007U_(U)
4797-2. Maintenance
7
Maintenance and care
Vehicle exterior
ItemsCheck points
Doors• Do the doors operate smoothly?
Engine hood• Does  the  engine  hood  lock  system  workproperly?
Fluid leaks
• There  should  not  be  any  signs  of  fluidleakage  after  the  vehicle  has  been
parked.
Tires
• Is the tire inflatio n pressure correct?
• The  tires  should  not  be  damaged  or excessively worn.
• Have  the  tires  been  rotated  according to the maintenance schedule?
• The wheel nuts should not be loose.
Windshield wipers/
rear window wiper
• The  wiper  blades  should  not  show  any
signs of cracking, splitting, wear, contam-
ination or deformation.
• The  wiper  blades  should  clear  the  wind- shield/rear  window  without  streaking  or
skipping.
WARNING
■If the engine is running
Turn the engine off and ensure that there is adequate ventilation before per-
forming maintenance checks. 
     
        
        Page 510 of 672
510
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7-3. Do-it-yourself maintenance
Remove the filter and replace it
with a new one.
The“  UP”  marks  shown  on  the  fil-
ter should be pointing up.
■ Checking interval
Replace  the air  conditioning filter  according  to the  maintenance  schedule. In
dusty  areas  or  areas  with  heavy  traffic  flow,  more  frequent  cleaning  or  early
replacement  may  be  required.  (For   scheduled  maintenance  information,
please  refer  to  the  “Scheduled  Maintenance  Guide”  or  “Owner’s  Manual
Supplement”.)
■ If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace it if necessary.
5
NOTICE
■When using the ai r conditioning system
Make sure that a filter is always installed.
Using the air conditioning system without a filter may cause damage to the
system. 
     
        
        Page 563 of 672
5638-2. Steps to take in an emergency
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8
When trouble arises
Indicates  that  the  accelerator  and  brake  pedal
are being depressed simultaneously
Release the accelerator or brake pedal.
Indicates that the washer fluid level is low
 Add washer fluid.
Indicates  that  remaining  fuel  is  approximately
3.0 gal. (11.4 L, 2.5 Imp.gal.) or less
 Refuel the vehicle.
(U.S.A. only)
Indicates  that  all  maintenance  according  to  the
driven  distance  on  the  maintenance  schedule
*
should be performed soon.
Comes  on  approximately  4500  miles  (7200  km)
after the message has been reset.
If necessary, perform maintenance.
Warning messageDetails/Actions
(Flashes) 
     
        
        Page 564 of 672
5648-2. Steps to take in an emergency
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*: Refer to the separate “Scheduled Maintenance Guide” or “Owner’s ManualSupplement” for the maintenance interval applicable to your vehicle.
(U.S.A. only)
Indicates  that  all  maintenance  is  required  to  cor-
respond  to  the  driven  distance  on  the  mainte-
nance schedule
*.
Comes  on  approximately  5000  miles  (8000  km)
after the message has been reset. (The indicator
will  not  work  properly  unless  the  message  has
been reset.)
 Perform the necessary maintenance.
Please reset the message after the mainte-
nance is performed ( P. 475)
(If equipped)
Indicates  that  the  PCS  (Pre-collision  system)  is
not  currently  functional  because  the  grille  cover
or the sensor is dirty
Check the grille cover and the sensor and
clean them if they are dirty.
Warning messageDetails/Actions