tire pressure reset TOYOTA SIENNA 2018 Owners Manual (in English)

20Pictorial index
SIENNA_OM_OM08019U_(U)
■Switches
Power window switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 184
Window lock switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 184
Driving position memory switches
*1. . . . . . . . . . . . . . . . . . P. 169
Outside rear view mirror switches . . . . . . . . . . . . . . . . . . . . P. 181
Door lock switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 114
Inside lock buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 114, 122
Power quarter window switch
*1. . . . . . . . . . . . . . . . . . . . . . P. 187
VSC OFF switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 323
Intuitive parking assist switch
*1 . . . . . . . . . . . . . . . . . . . . . P. 314
Panoramic view monitor switch
*1, 2
Heated steering wheel switch*1. . . . . . . . . . . . . . . . . . . . . . P. 344
Manual headlight leveling dial
*1 . . . . . . . . . . . . . . . . . . . . . P. 243
Power sliding door main switch
*1. . . . . . . . . . . . . . . . . . . . P. 124
Power back door main switch
*1. . . . . . . . . . . . . . . . . . . . . . P. 136
Seat heater dials
*1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 344
Tire pressure warning reset switch . . . . . . . . . . . . . . . . . . . P. 421
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422
SIENNA_OM_OM08019U_(U)
6-3. Do-it-yourself maintenance
Press and hold the tire pres-
sure warning reset switch
until the tire pressure warn-
ing light blinks slowly 3 times.
Vehicles without a smart key system: Wait for a few minutes with
the engine switch in the “ON” position and then turn the engine
switch to the “ACC” or “LOCK” position.
Vehicles with a smart key system : Wait for a few minutes with the
engine switch in IGNITION ON mode and then turn the engine
switch off.
◆Registering ID codes
The tire pressure warning valve and transmitter is equipped wit h a
unique ID code. When replacing a tire pressure warning valve an d
transmitter, it is necessary to register the ID code. Have the ID code
registered by your Toyota dealer.
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SIENNA_OM_OM08019U_(U)
4256-3. Do-it-yourself maintenance
6
Maintenance and care
■Situations in which the tire pressure warning system may not oper-
ate properly
The tire pressure warning syst em will be disabled in the follow ing condi-
tions:
(When the condition becomes normal, the system will work properly.)
●If tires not equipped with tire pressure warning valves and tra nsmitters
are used.
●If the ID code on the tire pressure warning valves and transmit ters is not
registered in the tire pr essure warning computer.
●If the tire inflation pressure is 73 psi (500 kPa, 5.1 kgf/cm2 or bar) or
higher.
The tire pressure warning system may be disabled in the followi ng condi-
tions:
(When the condition becomes normal, the system will work properly.)
●If electronic devices or facilitie s using similar radio wave frequencies are
nearby.
●If a radio set at similar frequen cies is in use in the vehicle.
●If a window tint that affects the radio wave signals is installed.
●If there is a lot of snow or ice on the vehicle, in particular around the
wheels or wheel housings.
●If non-genuine Toyota wheels are used. (Even if you use Toyota wheels,
the tire pressure warning system may not work properly with som e types
of tires.)
●If tire chains are used.
■Initializing the tire pressure warning system
Initialize the system with the tire inflation pressure adjusted to the speci-
fied level.
■If you press the tire pressure warning reset switch accidentall y
If initialization is performed, adjust the tire inflation press ure to the speci-
fied level and initialize the tire pressure warning system again.
■When the initializati on of the tire pressure warning system has failed
Initialization can be completed i n a few minutes. However, in the following
cases, the settings has not been recorded and the system will n ot operate
properly. If repeated attempts to record tire inflation pressur e settings are
unsuccessful, have the vehicle in spected by your Toyota dealer.
●When operating the tire pressure warning reset switch, the tire pressure
warning light does no t blink 3 times.
●After driving for a certain period of time since the initializa tion has been
completed, the warning light comes on after blinking for 1 minute.

SIENNA_OM_OM08019U_(U)
4276-3. Do-it-yourself maintenance
6
Maintenance and care
WARNING
■When inspecting or replacing tires
Observe the following precautions to prevent accidents. Failure to do so
may cause damage to parts of the drive train, as well as danger ous han-
dling characteristics, which may lead to an accident resulting in death or
serious injury.
●Do not mix tires of different ma kes, models or tread patterns.
Also, do not mix tires of re markably different treadwear.
●Do not use tire sizes other th an those recommended by Toyota.
●Do not mix differently constructed tires (radial, bias-belted o r bias-ply
tires).
●Do not mix summer, all season and snow tires.
●Do not use tires that have b een used on another vehicle.
Do not use tires if you do not kn ow how they were used previous ly.
●Vehicles with a compact spare tire: Do not tow if your vehicle has a
compact spare tire installed.
■When initializing the tire pressure warning system
Do not operate the tire pressure warning reset switch without first
adjusting the tire inflation pressure to the specified level. O therwise, the
tire pressure warning light may not come on even if the tire in flation
pressure is low, or it may come on when the tire inflation pres sure is
actually normal.

4767-2. Steps to take in an emergency
SIENNA_OM_OM08019U_(U)
■SRS warning light
This warning light system monitors the airbag sensor assembly, front impact
sensors, side impact sensors (front door), side impact sensors (rear), driver’s
seat position sensor, driver’s seat belt buckle switch, front passenger occu-
pant classification system (ECU and sensors), “AIR BAG ON” indi cator light,
“AIR BAG OFF” indicator light, front passenger’s seat belt buck le switch, seat
belt assemblies, airbags, inter connecting wiring and power sour ces. (P. 38)
■ Front passenger detection sensor, seat belt reminder and warnin g
buzzer
● If luggage is placed on the front passenger seat, the front pas senger detec-
tion sensor may cause the warning light to flash and the warnin g buzzer to
sound even if a passenger is not sitting in the seat.
● If a cushion is placed on the seat, the sensor may not detect a passenger,
and the warning light may not operate properly.
■ 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 light will go off after several driving trips.
If the light does not go off even after several trips, contact your Toyota dealer
as soon as possible.
■ Electric power steering system wa rning light (warning buzzer)
When the battery charge becomes insufficient or the voltage tem porarily
drops, the electric power steering system warning light may com e on and the
warning buzzer may sound.
■
When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level. Push-
ing the tire pressur e warning reset switch will not turn off the tire pressure
warning light.
■The tire pressure warning light may come on due to natural caus es
The tire pressure warning light may come on due to natural caus es such
as natural air leaks and tire inflation pressure changes caused by tem-
perature. In this case, adjusting the tire inflation pressure w ill turn off the
warning light (afte r a few minutes).

4967-2. Steps to take in an emergency
SIENNA_OM_OM08019U_(U)
■The compact spare tire
●The compact spare tire is identified by the label “TEMPORARY USE
ONLY” on the tire sidewall.
Use the compact spar e tire temporarily, and only in an emergenc y.
●Make sure to check the tire inflation pressure of the compact s pare tire.
(  P. 5 2 4 )
■After completing the tire change
The tire pressure warni ng system must be reset. ( P. 421)
■When using the compact spare tire
As the compact spare tire is not equipped with a tire pressure warning
valve and transmitter, low inflation pressure of the spare tire will not be
indicated by the tire pressure warning system. Also, if you rep lace the
compact spare tire after the tire pressure warning light comes on, the light
remains on.
■When the compact spa re tire is equipped
The vehicle becomes lower when driving with the compact spare t ire
compared to when driving with standard tires
■If you have a flat front tire on a road covered with snow or ic e
Install the compact spare tire on one of the rear wheels of the vehicle.
Perform the following steps and f it tire chains to the front tires:
Replace a rear tire with the compact spare tire.
Replace the flat front tire with the tire removed from the rear of the vehi-
cle.
Fit tire chains to the front tires.
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581Alphabetical index
SIENNA_OM_OM08019U_(U)
Door lock switch.................... 114
Driving position memory switches.............................. 169
Emergency flashers switch ................................. 462
Engine switch................ 225, 228
Fog light switch ..................... 251
Garage door opener switches.............................. 374
Heated steering wheel .......... 344
Ignition switch ............... 225, 228
Intuitive parking assist switch ................................. 314
LDA
(Lane Departure Alert)........ 282
Light switches ....................... 241
Moon roof switches ............... 189
Outside rear view mirror switches.............................. 181
Power back door ................... 134
Power door lock switch ......... 114
Power window switch.... 184, 187
Rear window wiper and
washer switch ..................... 256
Rear window and outside rear view mirror
defoggers switch ................ 336
Seat heater switches ............ 344
“SOS” button ......................... 385
Talk switch
*
Telephone switches*
Tire pressure warning reset switch ........................ 421
TRAC OFF switch ................. 323
Vehicle-to-vehicle distance switch ................................. 292
Window lock switch............... 184
Wiper and washer switch ......................... 252, 256 Tachometer ................................ 90
Tail lights
Light switch ........................... 241
Replacing light bulbs................... 453, 455, 456
Wattage ................................ 525
Talk switch
*
Telephone switch*
Theft deterrent system Alarm ...................................... 79
Engine immobilizer system ..... 77
Tire inflation pressure............. 429 Maintenance data ................. 522
Warning light......................... 474
Tire pressure warning system Function ................................ 421
Initializing .............................. 421
Installing tire pressure warning valves and
transmitters ........................ 421
Registering ID codes ............ 422
Tire pressure warning reset switch ........................ 421
Warning light......................... 474
T
*: Refer to “NAVIGATION AND MULTIMEDIA
SYSTEM OWNER’S MANUAL”