Page 412 of 668

4126-1. Using the air conditioning system and defogger
SIENNA_OM_OM08013U_(U)■
Switching between outside air and recirculated air modes
Press  .
The  mode  switches  between  outside  air  mode  (   appears  on  the
display) and recirculated air mode (  appears on the display) each
time the button is pressed.
■
Defogging the windshield
Defoggers  are  used  to  defog  the  windshield  and  front  side  win-
dows.
Press 
.
Set   to outside air mode if the recirculated air mode is used. (It
may switch automatically.)
To defog the windshield and the side windows early, turn the air flow and
temperature up.
To  return  to  the  previous  mode,  press    again  when  the  wind-
shield is defogged.
■
Rear window defogger, outside  rear view mirror defoggers (if
equipped) and windshield wi per de-icer (if equipped)
Defoggers are used to defog the rear window, and to remove rain-
drops, dew  and frost  from the  outside rear  view mirrors. The wind-
shield  wiper  de-icer  is  used  to  prevent  ice  from  building  up  on  the
windshield and wiper blades.
Press  .
The  defoggers  and  windshield  wiper  de-icer  will  automatically  turn  off
after a period of time.
Other functions 
     
        
        Page 465 of 668

SIENNA_OM_OM08013U_(U)
4657-1. Maintenance and care
7
Maintenance and care
■Aluminum wheels
●Remove any dirt immediately by using a neutral detergent. Do not use hard
brushes  or  abrasive  cleaners.  Do  not  use  strong  or  harsh  chemical  clean-
ers. 
Use the same mild detergent and wax as used on the paint.
● Do  not  use  detergent  on  the  wheels  when  they  are  hot,  for  example  after
driving for long distance in the hot weather.
● Wash detergent from the wheels immediately after use.
■ Bumpers and side moldings
Do not scrub with abrasive cleaners.
WARNING
■When washing the vehicle
Do not apply water to the inside of the engine compartment. Doing so may
cause the electrical components etc. to catch fire.
■ When cleaning the windshield (veh icles with rain-sensing windshield
wiper)
● When  the  upper  part  of  the  windshi eld  where  the  raindrop  sensor  is
located is touched by hand
● When a wet rag or similar is held close to the raindrop sensor
● If something bumps against the windshield
● If  you  directly  touch  the  raindrop  sensor  body  or  if  something  bumps  into
the raindrop sensor
■ Precautions regarding the exhaust pipe
Exhaust gasses cause the exhaust pipe to become quite hot.
When  washing  the  vehicle,  be  careful  not  to  touch  the  pipe  until  it  has
cooled sufficiently, as touching a hot exhaust pipe can cause burns.
■ Precaution regarding the Blind Spot Monitor
If the paint of the rear bumper is chipped or scratched, the system may mal-
function. If this occurs, consult your Toyota dealer.
Set the wiper switch to off.
If  the  wiper  switch  is  in  “AUTO”,  the  wip-
ers  may  operate  unexpectedly  in  the  fol-
lowing  situations,  and  may  result  in
hands being caught or other serious inju-
ries  and  cause  damage  to  the  wiper
blades.
Off 
     
        
        Page 466 of 668

466
SIENNA_OM_OM08013U_(U)
7-1. Maintenance and care
NOTICE
■To prevent paint deterioration and  corrosion on the body and compo-
nents (aluminum wheels etc.)
● Wash the vehicle immediately in the following cases:
• After driving near the sea coast
• After driving on salted roads
• If coal tar or tree sap is present on the paint surface
• If you see dead insects, insect droppings or bird droppings on the paint
• After  driving in an  area  contaminated  with  soot,  oily  smoke,  mine  dust,
iron powder or chemical substances
• If the vehicle becomes heavily soiled in dust or mud
• If liquids such as benzene and gasoline are spilled on the paint surface
● If the paint is chipped or scratched, have it repaired immediately.
● To prevent the wheels from corroding, remove any dirt and store in a place
with low humidity when storing wheels.
■ Cleaning the exterior lights
●Wash carefully. Do not use organic substances or scrub with a hard brush. 
This may damage the surface of the lights.
● Do not apply wax on the surfaces of the lights.
Wax may cause damage to the lenses.
■ When using an automatic car wash  (vehicles with rain-sensing wind-
shield wipers)
Set the wiper switch to the off position. If the wiper switch is in “AUTO”, the
wipers may operate and the wiper blades may be damaged.
■ When using a high pressure car wash
Do  not  bring  the  nozzle  tip  close  to  boots  (rubber  or  resin  manufactured
cover), connectors or the following parts. The parts may be damaged if they
come into contact with high-pressure water.
• Traction related parts
• Steering parts
• Suspension parts
• Brake parts 
     
        
        Page 475 of 668
SIENNA_OM_OM08013U_(U)
4757-2. 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.