2012 TOYOTA SIENNA light

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4-3. Do-it-yourself maintenance
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Maintenance and care
SIENNA_U (OM45477U)
CAUTION
■
Chemicals in the battery
Batteries contain poisonous and corrosive sulfuric acid and may produce
hydrogen gas which is flammable and explosive. To reduce the risk of death
or serious injury, take the following precautions while working on or near the
battery:
● Do not cause sparks by touching the battery terminals with tools.
● Do not smoke or light a match near the battery.
● Avoid contact with eyes, skin and clothes.
● Never inhale or swallow electrolyte.
● Wear protective safety glasses when working near the battery.
● Keep children away from the battery.
■ Where to safely charge the battery
Always charge the battery in an open area. Do not charge the battery in a
garage or closed room where there is insufficient ventilation.

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4-3. Do-it-yourself maintenance
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Maintenance and care
SIENNA_U (OM45477U)
Washer fluid
If any washer does not work or
the low washer fluid warning light
comes on, the washer tank may
be empty. Add washer fluid.
CAUTION
■When refilling washer fluid
Do not refill washer fluid when the engine is hot or running, as washer fluid
contains alcohol and may catch fire if spilled on the engine etc.
NOTICE
■Do not use any fluid other than washer fluid
Do not use soapy water or engine antifreeze instead of washer fluid.
Doing so may cause streaking on the vehicle’s painted surfaces.
■ Diluting washer fluid
Dilute washer fluid with water as necessary.
Refer to the freezing temperatures listed on the washer fluid tank.

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4-3. Do-it-yourself maintenance
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Maintenance and care
SIENNA_U (OM45477U)
Turn the engine switch to the “O
N” position (vehicles without a
smart key system) or “ENGINE START STOP” switch to IGNI-
TION ON mode (vehicles with a smart key system).
Press and hold the tire pressure
warning reset switch until the tire
pressure warning 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 START STOP” switch in IGNITION ON mode
and then turn the “ENGINE START STOP” switch off.
STEP3
STEP4
STEP5

676 4-3. Do-it-yourself maintenance
SIENNA_U (OM45477U)
Registering ID codesThe tire pressure warning valve and transmitter is equipped with a
unique ID code. When replacing a tire pressure warning valve and
transmitter, it is necessary to regi ster the ID code. Have the ID code
registered by your Toyota dealer.
■When to replace your vehicle’s tires
Tires should be replaced if:
●You have tire damage such as cuts, splits, cracks deep enough to
expose the fabric, and bulges indicating internal damage
●A tire goes flat repeatedly or c annot be properly repaired due to the
size or location of a cut or other damage
If you are not sure, consult with your Toyota dealer.
■Replacing tires and wheels
If the ID code of the tire pressure warning valve and transmitter is not
registered, the tire pre ssure warning system will not work properly. After
driving for about 20 minutes, the tire pressure warning light blinks for
1 minute and stays on to indicate a system malfunction.

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4-3. Do-it-yourself maintenance
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Maintenance and care
SIENNA_U (OM45477U)
■Initializing the tire pressure warning system
Initialize the system with the tire infl
ation pressure adjusted to the speci-
fied level.
■If the tread on snow tires wears down below 0.16 in. (4 mm)
The effectiveness of the tires as snow tires is lost.
■If you press the tire pressure warning reset switch accidentally
If initialization is performed, adjust t he tire inflation pressure to the speci-
fied level and initialize the tire pressure warning system again.
■When the initialization of the tire pressure warning system has
failed
Initialization can be completed in a few minutes. However, in the follow-
ing cases, the settings has not bee n recorded and the system will not
operate properly. If repeated attempts to record tire inflation pressure
settings are unsuccessful, have the vehicle inspected by your Toyota
dealer.
●When operating the tire pressure warning reset switch, the tire pres-
sure warning light doe s not blink 3 times.
●After driving for a certain period of time since the initialization has
been completed, the wa rning light comes on after blinking for 1
minute.

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4-3. Do-it-yourself maintenance
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Maintenance and care
SIENNA_U (OM45477U)
CAUTION
■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 dangerous 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 remarkably different treadwear.
●Do not use tire sizes other than those recommended by Toyota.
●Do not mix differently constructed ti res (radial, bias-belted or bias-ply
tires).
●Do not mix summer, all season and snow tires.
●Do not use tires that have been used on another vehicle.
Do not use tires if you do not know how they were used previously.
●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 wa rning reset switch without first adjust-
ing the tire inflation pr essure to the specified level. Otherwise, the tire
pressure warning light may not come on even if the tire inflation pressure
is low, or it may come on when the ti re inflation pressure is actually nor-
mal.

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4-3. Do-it-yourself maintenance
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Maintenance and care
SIENNA_U (OM45477U)
Fuse layout and amperage ratings
■ Engine compartment
FuseAmpereCircuit
1H-LP LVL
*17.5 A Headlight leveling system
2DSS1 7.5 A PCS (Pre-collision system),
dynamic radar cruise control sys-
tem
3 ST NO.2 7.5 A Starting system, multiport fuel
injection system/sequential multi-
port fuel injection system
4H-LP LH
*120 A Left-hand headlight (low beam)
5H-LP RH
*120 A Right-hand headlight (low beam)

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SIENNA_U (OM45477U)
FuseAmpereCircuit
6 ECT 7.5 A Multiport fuel injection system/
sequential multiport fuel injection
system, automatic transaxle
7 EFI NO.2 10 A Multiport fuel injection system/
sequential multiport fuel injection
system
8 H-LP RH HI 10 A Right-hand headlight (high beam)
9 H-LP LH HI 10 A Left-hand headlight (high beam)
10 SPARE 10 A Spare-fuse 11 SPARE 15 A Spare-fuse
12 SPARE 20 A Spare-fuse
13 MG CLT 7.5 A A/C magnetic clutch
14 INV 20 A Inverter
15 PTC HTR
NO.1
*250 A PTC heater
16 PTC HTR
NO.2
*230 A PTC heater
17 PTC HTR
NO.3
*230 A PTC heater
18 A/C RR 40 A Rear air conditioning system
19 PBD 30 A Power back door
20 FOLD SEAT
*330 A Power third seat
21 HTR 50 A Air conditioning system
22 PSB
*330 A Pre-collision seat belt
23 A/A SEAT 30 A AUTO ACCESS SEAT