Page 9 of 340
03 SIENNA_U (L/O 0207)
52003 MY SIENNA (OM45410U)
1. Engine coolant temperature gauge
2. Tachometer
3. Service reminder indicators andindicator lights 4. Speedometer
5. Fuel gauge
6. Trip meter reset knob
7. Odometer and two trip meters
Instrument cluster overview
With tachometer
Page 10 of 340
03 SIENNA_U (L/O 0207)
62003 MY SIENNA (OM45410U)
1. Engine coolant temperature gauge
2. Service reminder indicators andindicator lights
3. Speedometer 4. Odometer and two trip meters
5. Fuel gauge
6. Trip meter reset knob
Without tachometer
Page 139 of 340
03 SIENNA_U (L/O 0207)
1352003 MY SIENNA (OM45410U)
OPERATION OF INSTRUMENTS AND
CONTROLS
Gauges, Meters and Service reminder indicators
Fuel gauge136
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . .
Engine coolant temperature gauge 136
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Tachometer 137
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . . . .
Odometer and two trip meters 138
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service reminder indicators and warning buzzers 139
. . . . . . . . . . . . . .
SECTION 1 5
Page 142 of 340

03 SIENNA_U (L/O 0207)
1382003 MY SIENNA (OM45410U)
With tachometer
Without tachometer
This meter displays the odometer and
two trip meters.1. Odometer—It shows the total distance the vehicle has been driven.
2. Two trip meters—Show two different distances independently driven since
the last time each trip meter was set
to zero.
You can use one trip meter to calculate
the fuel economy and the other to
measure the distance on each trip. All
trip meter data is cancelled if the elec-
trical power source is disconnected.
3. Trip meter reset knob—Resets the two trip meters to zero, and also change
the meter display.
To change the meter display, quickly
push and release the knob. The meter
display changes in the order from the
odometer to trip meter A to trip meter
B, then back to the odometer each
time you push.
To reset the trip meter A to zero, dis-
play the meter A reading, then push
and hold the knob until the meter is
set to zero. The same process can be
applied for resetting the trip meter B.
Odometer and two trip meters
Page 307 of 340

03 SIENNA_U (L/O 0207)
3032003 MY SIENNA (OM45410U)
Tread wear indicator
CHECKING YOUR TIRES
Check the tires tread for the tread wear
indicators. If the indicators show, re-
place the tires.
The tires on your Toyota have built in
tread wear indicators to help you know
when the tires need replacement. When
the tread depth wears to 1.6 mm (0.06
in.) or less, the indicators will appear. If
you can see the indicators in two or more
adjacent grooves, the tire should be re-
placed. The lower the tread, the higher
the risk of skidding.
The effectiveness of snow tires is lost
if the tread wears down below 4 mm
(0.16 in.).Check the tires regularly for damage
such as cuts, splits and cracks. If any
damage is found, consult with a techni-
cian and have the tire repaired or re-
placed.
Even if the damage does not appear seri-
ous, a qualified technician should examine
the damage. Objects which have pene-
trated the tire may have caused internal
damage.
Any tires which are over 6 years old
must be checked by a qualified techni-
cian even if damage is not obvious.
Tires deteriorate with age even if they
have never or seldom been used.
This applies also to the spare tire and
tires stored for future use.
REPLACING YOUR TIRES
When replacing a tire, use only the
same size and construction as original-
ly installed and with the same or great-
er load capacity.
Using any other size or type of tire may
seriously affect handling, ride, speedome-
ter/odometer calibration, ground clearance,
and clearance between the body and tires
or snow chains.
CAUTION
Observe the following instructions.
Otherwise, an accident may occur re-
sulting in death or serious injuries.
Do not mix radial, bias belted, or
bias ply tires on your vehicle, as
this may cause dangerous handling
characteristics resulting in loss of
control.
Do not use tires other than the
manufacturer ’s recommended size,
as this may cause dangerous han-
dling characteristics resulting in
loss of control.
Toyota recommends all four tires, or at
least both front or rear tires be re-
placed as a set.
See “If you have a flat tire” in Section 4
for tire change procedure.
When a tire is replaced, the wheel
should always be balanced.
An unbalanced wheel may affect vehicle
handling and tire life. Wheels can get out
of balance with regular use and should
therefore be balanced occasionally.
Checking and replacing tires