2017 TOYOTA SIENNA ECU

484
SIENNA_OM_OM08007U_(U)
7-3. Do-it-yourself maintenance
WARNING
■Pre-driving check
Check that the hood is fully closed and locked.
If the hood is not locked properly, it may open while the vehicle is in motion
and cause an accident, which may result in death or serious injury.
■ After installing the support rod into the slot
Make sure the rod supports the hood securely from falling down on to your
head or body.
NOTICE
■When closing the hood
Be sure to return the support rod to its clip before closing the hood. Closing
the hood with the support rod up could cause the hood to bend.

SIENNA_OM_OM08007U_(U)
5217-3. Do-it-yourself maintenance
7
Maintenance and care
Install a new light bulb.
Align the 3 tabs on the light bulb
with the mounting, and insert.
Turn and secure the bulb
base.
Install the connector.
Shake the bulb base gently to
check that it is not loose, turn
the headlights on once and visu-
ally confirm that no light is leak-
ing through the mounting.
For left side only: Install the fuse box cover.
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5
6
7

522
SIENNA_OM_OM08007U_(U)
7-3. Do-it-yourself maintenance
■Headlight high beams and bulb type daytime running lights (if
equipped)
For left side only:
Open the fuse box cover. ( P. 514)
Turn the bulb base counter-
clockwise.
Unplug the connector while
pushing the lock release.
Install a new light bulb.
Align the 3 tabs on the light bulb
with the mounting, and insert.
Turn and secure the bulb
base.
Shake the bulb base gently to
check that it is not loose, turn
the headlights on once and visu-
ally confirm that no light is leak-
ing through the mounting.
For left side only: Install the fuse box cover.
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2
ITO43P165
P
Q
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S

524
SIENNA_OM_OM08007U_(U)
7-3. Do-it-yourself maintenance
Install a new light bulb.
Align the 3 tabs on the light bulb
with the mounting and insert.
Turn clockwise and secure
the bulb base.
Install the connector.
Shake the connector gently to
check that it is not loose, turn
the fog lights on once and visu-
ally confirm that no light is leak-
ing through the mounting.
When installing the engine under cover, reverse the step .
4
5
6
71

528
SIENNA_OM_OM08007U_(U)
7-3. Do-it-yourself maintenance
■Rear turn signal lights (vehicles with LED type stop/tail lights)Remove the securing bolts
and remove the unit.
Turn the bulb base counter-
clockwise.
Remove the light bulb.
1
2
3

SIENNA_OM_OM08007U_(U)
5297-3. Do-it-yourself maintenance
7
Maintenance and care
■Rear turn signal lights and stop/tail lights (vehicles with bulb
type stop/tail lights)
Remove the securing bolts
and remove the unit.
Unplug the connector while
pushing the lock release.
Turn the bulb base counter-
clockwise.Rear turn signal lights
Stop/tail lights
Remove the light bulb. Rear turn signal lights
Stop/tail lights
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2
3
1
2
4
1
2

SIENNA_OM_OM08007U_(U)
5337-3. Do-it-yourself maintenance
7
Maintenance and care
WARNING
■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. When it is
unavoidable to hold the glass portion, use and hold with a clean dry cloth
to avoid getting moisture and oils on the bulb. Also, 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.
● Do not attempt to repair or disassemble the bulb, socket, electrical wiring,
or sub components. This may cause serious injury due to electric shock.
●Vehicles with discharge headlights:
While the low beam headlights are
turned on, and for a short time after they
have been turned off, metal compo-
nents 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

537
SIENNA_OM_OM08007U_(U)
8
When trouble arises
8-1. Essential information
If your vehicle has to be stopped in an emergency
Steadily step on the brake pedal with both feet and firmly depress it.
Do not pump the brake pedal repeatedly as this will increase the effort
required to slow the vehicle.
Shift the shift lever to N.
If the shift lever is shifted to N
After slowing down, stop the vehicle in a safe place by the road.
Stop the engine.
If the shift lever cannot be shifted to N
Keep depressing the brake pedal with both feet to reduce vehicle
speed as much as possible.
Vehicles without a smart key
system: Stop the engine by
turning the engine switch to the
“ACC” position.
Vehicles with a smart key sys-
tem: To stop the engine, press
and hold the engine switch for 2
consecutive seconds or more,
or press it briefly 3 times or
more in succession.
Stop the vehicle in a safe place by the road.
Only in an emergency, such as if it becomes impossible to stop
the vehicle in the normal way, st op the vehicle using the follow-
ing procedure:
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2
3
4
3
4
Press and hold for 2 seconds or
more or press briefly 3 times or
more
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