2012 TOYOTA SIENNA low beam

699
4-3. Do-it-yourself maintenance
4
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)

701
4-3. Do-it-yourself maintenance
4
Maintenance and care
SIENNA_U (OM45477U)
FuseAmpereCircuit
24 FAN 60 A Electric cooling fans
25 HAZ 15 A Turn signal lights, gauges and
meters
26 RSE 15 A Rear seat entertainment system
27 MIRROR
*310 A Outside rear view mirror control,
outside rear view mirror heaters
28 AMP 30 A Audio system
29 VSC NO.2 30 A Vehicle dynamics integrated man-
agement, ABS, vehicle stability
control
30 ST 30 A Starting system
31 P/I 40 A Horn, left-hand headlight (low
beam), right-hand headlight (low
beam)
32 H-LP MAIN
*140 A Discharge headlight
SPARE
*430 A Spare-fuse
33 AM2
*530 A “ST NO.2”, “GAUGE NO.2” and
“IG2” fuses
34 VSC NO.1 50 A Vehicle dynamics integrated man-
agement, ABS, vehicle stability
control

702 4-3. Do-it-yourself maintenance
SIENNA_U (OM45477U)
FuseAmpereCircuit
35 ALT 140 A Charging system, horn, left-hand
headlight (low beam), right-hand
headlight (low beam), fog light, out-
side rear view mirror heaters, rear
window defoggers, windshield
wiper de-icer
36 RAD NO.1 15 A Audio system
37 DOME 7.5 A Vanity lights, personal/interior
lights, personal lights, engine
switch light, rear ceiling lights, door
courtesy lights, luggage compart-
ment light, gauges and meters,
clock
38 ECU-B 10 A Main body ECU, smart key system,
wireless remote control, power
back door, power sliding door, rear
view monitor, multi information dis-
play, power window, outside rear
view mirror control, steering angle
sensor, auto-anti glare inside rear
view mirror, AUTO ACCESS SEAT
remote control, front passenger
occupant classification system
39 ETCS 10 A Multiport fuel injection system/
sequential multiport fuel injection
system
40 A/F 20 A Multiport fuel injection system/
sequential multiport fuel injection
system
41 STRG LOCK
*620 A Steering lock system
42 ALT-S 7.5 A Charging system

709
4-3. Do-it-yourself maintenance
4
Maintenance and care
SIENNA_U (OM45477U)
Light bulbs
You may replace the following bulbs by yourself. The difficulty level
of replacement varies depending on the bulb. If necessary bulb
replacement seems difficult to perfor m, contact your Toyota dealer.
For more information about replacing other light bulbs, contact your
Toyota dealer.
■ Preparing for light bulb replacement
Check the wattage of the light bulb to be replaced. ( P. 796)
■ Turning off the power back door main switch
P. 8 4
■ Front bulb locations
Fog light Headlight high beam
and daytime running
lights Headlight
low beam
Front turn signal/parking
and front side marker
lights

710 4-3. Do-it-yourself maintenance
SIENNA_U (OM45477U)
Replacing light bulbs■ Headlight low beams (halogen bulb)
For left side only:
Open the fuse box cover. ( P. 696)
Unplug the connector while
pushing the lock release.
■ Rear bulb locations
Back-up lightRear turn
signal light
License plate
lightsTail light
STEP1
STEP2

717
4-3. Do-it-yourself maintenance
4
Maintenance and care
SIENNA_U (OM45477U)
■
Lights other than the above
If any of the lights listed below has burnt out, have it replaced by
your Toyota dealer.
● Headlight low beams (discharge bulbs)
● High mounted stoplight
● Stop/tail and rear side marker lights
● Outer foot lights (if equipped)
■Discharge headligh ts (if equipped)
If voltage to the discharge bulbs is insufficient, the bulbs may not come on,
or may go out temporarily. The discharge bulbs will come on when normal
power is restored.
■ LED lights
The stop/tail and rear side marker lights and high mounted stoplight consists
of a number of LEDs. If any of the LEDs burn out, take your vehicle to your
Toyota dealer to have the light replaced.
■ Condensation build-up on th e inside of the lens
Contact your Toyota dealer for more information in the following situations.
Temporary condensation build-up on the inside of the headlight lens does
not indicate a malfunction.
● Large drops of water have built up on the inside of the lens.
● Water has built up inside the headlight.
■ When replacing light bulbs
 P. 708

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.