2003 TOYOTA SIENNA Owners Manual

03 SIENNA_U (L/O 0207)
1972003 MY SIENNA (OM45410U)
To cool off your Toyota after it has
been parked in the hot sun, drive with
the windows open for a few minutes.
This vents the hot air, allowing the air
conditioning to cool the interior more
quickly.
Make sure the air intake grilles in front
of the windshield are not blocked (by
leaves or snow, for example).
On humid days, do not blow cold air
on the windshield. The windshield could
fog up because of the difference in air
temperature on the inside and outside
of the windshield.
Keep the area under the front seats
clear to allow air to circulate through-
out the vehicle.
On cold days, set the fan speed selec-
tor to adjust the fan speed high for a
minute to help clear the intake ducts
of snow or moisture. This can reduce
the amount of fogging on the windows.
When driving on dusty roads, close all
windows. If dust thrown up by the ve-
hicle is still drawn into the vehicle after
closing the windows, it is recommended
that the air intake selector be set to
FRESH and the fan speed selector to
any setting except “OFF”.
—Air flow selector settings—Operating tips

03 SIENNA_U (L/O 0207)
1982003 MY SIENNA (OM45410U)
If following another vehicle on a dusty
road, or driving in windy and dusty
conditions, it is recommended that the
air intake selector be temporarily set to
RECIRCULATE, which will close off the
outside passage and prevent outside
air and dust from entering the vehicle
interior.
Heating
For best results, set controls to:
For automatic operation—
Press in the “AUTO” button.
Temperature— To the desired
temperature
Air intake—FRESH (outside air)
Air conditioning—OFF
For manual operation—
Fan speed— To the desired fan speed
Temperature— Towards high temperature
Air intake—FRESH (outside air)
Air flow—FLOOR
Air conditioning—OFF
For quick heating, select recirculated
air for a few minutes. To keep the
windows from fogging, select fresh af-
ter the vehicle interior has been
warmed.
Press the “A/C” button on for dehumidi-
fied heating.
Choose floor/windshield air flow to heat
the vehicle interior while defrosting or
defogging the windshield.
Air conditioning
For best results, set controls to:
For automatic operation—
Press in the “AUTO” button.
Temperature— To the desired
temperature
Air intake—FRESH (outside air)
Air conditioning—ON
For manual operation—
Fan speed— To the desired fan speed
Temperature— Towards low temperature
Air intake—FRESH (outside air)
Air flow—PANEL
Air conditioning—ON
For quick cooling, select recirculated
air for a few minutes.
Ventilation
For best results, set controls to:
For automatic operation—
Press in the “AUTO” button.
Temperature— To w a r d s low temperature
Air intake—FRESH (outside air)
Air conditioning—OFF
For manual operation—
Fan speed— To the desired fan speed
Temperature— To w a r d s low temperature
Air intake—FRESH (outside air)
Air flow—PANEL
Air conditioning—OFF

03 SIENNA_U (L/O 0207)
1992003 MY SIENNA (OM45410U)
Defogging
The inside of the windshield
For best results, set controls to:
For automatic operation—Temperature— To w a r d s high temperature
to heat; low temperature
to cool
Air intake—FRESH (outside air)
Air flow—WINDSHIELD
For manual operation—
Fan speed— To the desired fan speed
Temperature— To w a r d s high temperature
to heat; low temperature
to cool
Air intake—FRESH (outside air)
Air flow—WINDSHIELD
If your windshield is fogging, turn on the
defogger by pushing the “MODE” button to
select the floor/windshield vent, or push
the windshield air flow button.
The defogger is not automatically set to
either floor/ windshield or windshield air
flow.
If the windshield is fogging, manually turn
on the defogger. When pressing the windshield air flow but-
ton, the air intake selects FRESH auto-
matically. This is to clean up the front
view more quickly.
If you want to return the setting to
RECIRCULATE mode, press the air intake
selector button once again.
Press the “A/C” button for dehumidified
heating or cooling. This setting clears the
front view more quickly.
On humid days, do not blow cold air
on the windshield—the difference be-
tween the outside and inside tempera-
tures could make the fogging worse.
Defrosting
The outside of the windshield
For best results, set controls to:
For automatic operation—
Temperature— To w a r d s high temperature
Air intake—FRESH (outside air)
Air flow—WINDSHIELD
For manual operation—
Fan speed— To the desired fan speed
Temperature— To w a r d s high temperature
Air intake—FRESH (outside air)
Air flow—WINDSHIELD
If your windshield is frosting, turn on the
defroster by pushing the “MODE” button to
select the floor/windshield vent, or push
the windshield air flow button.
The defroster is not automatically set to
either floor/windshield or windshield air
flow.
If the windshield is frosting, manually turn
on the defroster.
When pressing the windshield air flow but-
ton, the air intake selects FRESH auto-
matically. This is to clean up the front
view more quickly.
If you want to return the setting to
RECIRCULATE mode, press the air intake
selector button once again.
Press the “A/C” button for dehumidified
heating or cooling. This setting clears the
front view more quickly.
To heat the vehicle interior while de-
frosting the windshield, choose
floor/windshield air flow.

03 SIENNA_U (L/O 0207)
2002003 MY SIENNA (OM45410U)
Driver’s side
Passenger’s side
If air flow control is not satisfactory, check
the side vents. The side vents may be
opened or closed as shown.
Side vents

03 SIENNA_U (L/O 0207)
2012003 MY SIENNA (OM45410U)
1. Fan speed selector (front)
2. Fan speed selector (rear)
3. Temperature selector
4. Air flow selector
Rear manual air conditioning system—
—Controls

03 SIENNA_U (L/O 0207)
2022003 MY SIENNA (OM45410U)
Fan speed selector (front)
To turn the rear air conditioning system
on/off and adjust the fan speed.
To turn the “REAR” position—You can op-
erate the rear air conditioning system by
the rear controller.
Turn the knob to adjust the fan speed—to
the right to increase, to the left to de-
crease. To turn the knob to “OFF” turns
off the rear air conditioning system and
the system cannot be operated by the
rear controller.
Fan speed selector (rear)
When the front fan speed selector is in
“REAR”, you can operate it.
Turn the knob to adjust the fan speed—to
the right to increase, to the left to de-
crease.
Temperature selector
Turn the knob to adjust the tempera-
ture—to the right to warm, to the “A/C”
position to cool.
Air flow selector
Turn the knob to select the vents used for
air flow.1. “A/C”— Air flows only from the roof
panel vents.
This setting does not control air tem-
perature. It is only for blowing air con-
ditioned cool air.
2. Except “A/C”— Air flows only from the
floor vents.
This controls the air temperature. It is
for blowing air conditioned cool air and
warm air.
—Air flow selector settings

03 SIENNA_U (L/O 0207)
2032003 MY SIENNA (OM45410U)
1. Fan position selector
2. Fan speed selector
3. Temperature selector
Rear automatic air conditioning system—
—Controls

03 SIENNA_U (L/O 0207)
2042003 MY SIENNA (OM45410U)
Fan position selector
“OFF”—You can turn off the rear air con-
ditioning.
“REAR”—You can operate the rear air
conditioning system by the rear controller.
“AUTO”—You can adjust the temperature
and fan speed of the front and rear air
conditioning systems simultaneously by
using the front air conditioning switches.
Fan speed selector
When the front fan position selector is in
“REAR”, you can operate it.
Turn the knob to adjust the fan speed—to
the right to increase, to the left to de-
crease.
To turn the knob to the “AUTO”—In the
automatic operation mode, the rear air
conditioning selects the most suitable fan
speed and air flow according to the tem-
perature.Temperature selector
Turn the knob to adjust the tempera-
ture—to the right to warm, to the left to
cool.
Air flow from the roof panel vents and/or
floor vents is automatically adjusted ac-
cording to the temperature when both au-
tomatic and manual modes are on.
The floor vents provide only cool air.
The roof panel vents provide warm air and
cool air.
Open
Close
If air flow control is not satisfactory, check
the roof vents. The roof vents may be
opened or closed as shown.
Roof vents