2012 TOYOTA SIENNA headlights

713
4-3. Do-it-yourself maintenance
4
Maintenance and care
SIENNA_U (OM45477U)
■
Front turn signal/parking and front side marker lights
For left side only:
Open the fuse box cover. ( P. 696)
Vehicles without discharge headlights Turn the bulb base counterclock-
wise.
Vehicles with discharge headlights
Remove the light bulb.
STEP1
STEP2
STEP2
STEP3

718 4-3. Do-it-yourself maintenance
SIENNA_U (OM45477U)
CAUTION
■Replacing light bulbs
● Turn off the lights. Do not attempt to replace the bulb immediately after
turning off the lights.
The bulbs become very hot and may cause burns.
● Do not touch the glass portion of the light bulb with bare hands. Hold the
bulb by the plastic or metal portion.
If the bulb is scratched or dropped it may blow out or crack.
● Fully install light bulbs and any parts used to secure them. Failure to do so
may result in heat damage, fire, or water entering the headlight unit. This
may damage the headlights or cause condensation to build up on the lens.
●Vehicles with discharge headlights:
While the low beam headlights are
turned on, and for a short time after
they have been turned off, metal com-
ponents at the rear of the headlight
assembly will be extremely hot. To pre-
vent burns, do not touch these metal
components until you are certain they
have cooled down.
Metal components

719
4-3. Do-it-yourself maintenance
4
Maintenance and care
SIENNA_U (OM45477U)
CAUTION
■
Discharge headligh ts (if equipped)
● Contact your Toyota dealer before replacing discharge headlights (includ-
ing light bulbs).
● Do not touch the discharge headlight’s high voltage socket when the head-
lights are turned on.
An extremely high voltage of 30000 V will be discharged and could result
in serious injury or death by electric shock.
● Do not attempt to take apart or repair the low beam headlight bulbs, con-
nectors, power supply circuits, or related components.
Doing so could result in electric shock and serious injury or death.
■ To prevent damage or fire
Make sure bulbs are fully seated and locked.
NOTICE
■When installing the back door trim
To prevent damage, be careful not to pinch any of the wire harnesses or
connectors with the back door trim.

762
5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
If the engine will not star t
If the engine will not start even though correct starting procedures
are being followed ( P. 226, 229), consider each of the following
points:
■ The engine will not start even though the starter motor
operates normally.
One of the following may be the cause of the problem:
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
● The engine may be flooded.
Try to restart the engine again following correct starting proce-
dures. ( P. 226, 229)
● There may be a malfunction in the engine immobilizer system
(if equipped). ( P. 159)
■ The starter motor turns over slowly, the interior lights and
headlights are dim, or the horn does not sound or sounds at
a low volume.
One of the following may be the cause of the problem:
●The battery may be discharged. ( P. 770)
● The battery terminal connec tions may be loose or corroded.
■ The starter motor does not turn over.
The engine starting system may be malfunctioning due to an
electrical problem such as an open circuit or a blown fuse. How-
ever, an interim measure is available to start the engine.

5
When trouble arises
763
5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
Emergency start function (vehicles with a smart key system)
When the engine does not start, the following steps can be used as
an interim measure to start the engine if the “ENGINE START STOP”
switch is functioning normally: Set the parking brake.
Shift the shift lever to P.
Turn the “ENGINE START STOP” switch to ACCESSORY
mode.
Press and hold the “ENGINE START STOP” switch for about
15 seconds while depressing the brake pedal firmly.
Even if the engine can be start ed using the above steps, the system
may be malfunctioning. Have the vehicle inspected by your Toyota
dealer.
■ The starter motor does not turn over, the interior lights and
headlights do not turn on, or the horn does not sound.
One of the following may be the cause of the problem:
● One or both of the battery terminals may be disconnected.
● The battery may be discharged. ( P. 770)
● There may be a malfunction in the steering lock system (vehi-
cle with a smart key system).
Contact your Toyota dealer if the problem cannot be repaired, or if
repair procedures are unknown.
STEP1
STEP2
STEP3
STEP4

5
When trouble arises
773
5-2. Steps to take in an emergency
SIENNA_U (OM45477U)
■
Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■ To prevent battery discharge
● Turn off the headlights and the audio system while the engine is off.
● Turn off any unnecessary electrical components when the vehicle is run-
ning at a low speed for an extended period, such as in heavy traffic.
■ When the battery is removed or discharged
● The power sliding door (if equipped) must be initialized. ( P. 67)
● The power back door (if equipped) must be initialized. ( P. 82)
● The moon roof (if equipped) must be initialized. ( P. 150)
■ Charging the battery
The electricity stored in the battery will discharge gradually even when the
vehicle is not in use, due to natural discharge and the draining effects of cer-
tain electrical appliances. If the vehicle is left for a long time, the battery may
discharge, and the engine may be unable to start. (The battery recharges
automatically during driving.)
CAUTION
■Avoiding battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flam-
mable gas that may be emitted from the battery:
● Make sure the jumper cable is connected to the correct terminal and that it
is not unintentionally in contact with any other than the intended terminal.
● Do not allow the + and - clamps of the jumper cables to come into contact
with each other.
● Do not smoke, use matches, cigarette lighters or allow open flame near
the battery.

796 6-1. Specifications
SIENNA_U (OM45477U)
Light bulbs
A: D4S discharge bulbsB: H11 halogen bulbs
C: HB3 halogen bulbs D: Wedge base bulbs (clear)
E: Wedge base bulbs (amber) F: Double end bulbs
Light BulbsBulb No.WTy pe
Exterior Headlights (low beam)
Discharge bulbs
Halogen bulbs 
35
55 A
B
Headlights (high beam) 9005 60 C
Front fog lights 55 B
Front turn signal/parking/side
marker lights 3457NAK 28/8 E
Rear turn signal lights WY21W 21 E
Tail lights W5W 5 D
Back-up lights 921 16 D
License plate lights W5W 5 D
Outer foot lights W6W 6 D
Interior Front personal/interior lights W5W 5 D
Rear personal/interior lights W5W 5 D
Luggage compartment light
5F
Vanity lights 2.8 F
Front door courtesy lights 5D

818 6-2. Customization
SIENNA_U (OM45477U)
ItemFunctionDefault settingCustomizedsetting
Power
sliding door
(if equipped)
(
P. 67) Operation signal
(buzzer)
Off On
Opening and closing
operation One short push Push and hold
Automatic
light control
system
( P. 266) Time elapsed before
headlights automati-
cally turn off after doors
are closed
*
30 seconds
0 second
60 seconds
90 seconds
Daytime running light
system (U.S.A. only) On Off
Light sensor sensitivity Level 3 Level 1 to 5
Automatic High Beam
(if equipped)
*On Off
Alarm
system
( P. 162) Time elapsed before
the alarm is set
14 seconds 30 seconds
Multi-
information
display
( P. 252) Language selection
*English
French
Spanish