warning light TOYOTA SIENNA HYBRID 2022 Service Manual

2154-1. Before driving
4
Driving
WARNING
●Do not leave a door or window
open if the curved glass is
coated with a metallized film
such as a silver-colored one.
Reflected sunlight may cause
the glass to act as a lens, caus-
ing a fire.
●Always apply the parking brake,
shift the shift lever to P, stop the
hybrid system and lock the vehi-
cle.
Do not leave the vehicle unat-
tended while the “READY” indi-
cator is illuminated.
If the vehicle is parked with the
shift lever in P but the parking
brake is not set, the vehicle may
start to move, possibly leading
to an accident.
●Do not touch the exhaust pipes
while the “READY” indicator is
illuminated or immediately after
turning the hybrid system off.
Doing so may cause burns.
■When taking a nap in the
vehicle
Always turn the hybrid system off.
Otherwise, if you accidentally
move the shift lever or depress
the accelerator pedal, this could
cause an accident or fire due to
hybrid system overheating. Addi-
tionally, if the vehicle is parked in
a poorly ventilated area, exhaust
gases may collect and enter the
vehicle, leading to death or a seri-
ous health hazard.
■When braking
●When the brakes a re wet, drive
more cautiously.
Braking distance increases
when the brakes are wet, and
this may cause one side of the
vehicle to brake differently than
the other side. Also, the parking
brake may not securely hold the
vehicle.
●If the electronically controlled
brake system does not operate,
do not follow other vehicles
closely and avoid hills or sharp
turns that require braking.
In this case, braking is still pos-
sible, but the brake pedal
should be depressed more
firmly than usual. Also, the brak-
ing distance will increase. Have
your brakes fixed immediately.
●The brake system consists of 2
or more individual hydraulic sys-
tems; if one of the systems fails,
the other will still operate. In this
case, the brake pedal should be
depressed more firmly than
usual and the braking distance
will increase. Have your brakes
fixed immediately.
■If the vehicle becomes stuck
(AWD models)
Do not spin the wheels exces-
sively when any of the tires is up
in the air, or the vehicle is stuck in
sand, mud, etc. This may damage
the driveline components or pro-
pel the vehicle forward or back-
ward, causing an accident.
NOTICE
■When driving the vehicle
●Do not depress the accelerator
and brake pedals at the same
time during driving, as this may
restrain the hybrid system out-
put.
●Do not use the accelerator
pedal or depress the accelera-
tor and brake pedals at the
same time to hold the vehicle on
a hill.

2364-2. Driving procedures
Modes can be changed by
pressing the power switch with
the brake pedal released. (The
mode changes each time the
switch is pressed.)
WARNING
■Stopping the hybrid system
in an emergency
●If you want to stop the hybrid
system in an emergency while
driving the vehicle, press and
hold the power switch for more
than 2 seconds, or press it
briefly 3 times or more in suc-
cession. (P.457)
However, do not touch the
power switch while driving
except in an emergency. Turn-
ing the hybrid system off while
driving will not cause loss of
steering or braking control.
However, power assist for the
steering wheel may be lost mak-
ing it difficult to steer smoothly
before stopping the vehicle
depending on the remaining
charge in the 12-volt battery or
usage conditions. In this situa-
tion, you should pull over and
stop the vehicle as soon as it is
safe to do so.
●If the power switch is operated
while the vehicle is running, a
warning message will be shown
on the multi-info rmation display
and a buzzer sounds.
●When restarting the hybrid sys-
tem after an emergency shut-
down, shift the shift lever to N
and press the power switch
shortly and firmly.
■When parking
Exhaust gases include harmful
carbon monoxide (CO), which is
colorless and odorless. Observe
the following precautions.
Failure to do so may cause
exhaust gases to enter the vehicle
and may lead to an accident
caused by light-headedness, or
may lead to death or a serious
health hazard.
●If the vehicle is in a poorly venti-
lated area or a closed area,
such as a garage, stop the
hybrid system.
●Do not leave the vehicle with
the hybrid system operating for
a long time. If such a situation
cannot be avoided, park the
vehicle in an open space and
ensure that exhaust fumes do
not enter the ve hicle interior.
●Do not leave the hybrid system
operating in an area with snow
build-up, or where it is snowing.
If snowbanks build up around
the vehicle while the hybrid sys-
tem is operating, exhaust gases
may collect and enter the vehi-
cle.
Changing power switch
modes

2464-2. Driving procedures
When the shift lever is shifted
from P, the parking brake will
be released, and the parking
brake indicator light and park-
ing brake switch indicator will
turn off.
 When the shift lever is shifted
to P, the parking brake will be
set, and the parking brake
indicator light and parking
brake switch indicator will turn
on.
Operate the shift lever with the
vehicle stopped and the brake
pedal depressed.
■Turning the automatic
mode off
While the vehicle is stopped and
depressing the brake pedal,
press and hold the parking
brake switch until a buzzer
sounds and a message is
shown on the multi-information
display.
■Parking brake operation
●When the power s witch is not in
ON, the parking brake cannot be
released using the parking brake
switch.
●When the power s witch is not in ON, automatic mode (automatic
brake setting and releasing) is not
available.
■Parking brake automatic
release function
The parking brake will be released
automatically when the accelerator
pedal is slowly depressed under the
following conditions:
●The driver’s door is closed
●The driver is wearing the seat belt
●The shift lever is in a forward or
reverse position.
●The malfunction in dicator lamp or
brake system warning light is not
illuminated
If the automatic release function
does not operate, release the park-
ing brake manually.
■Parking brake automatic lock
function
The parking brak e will be locked
automatically when the brake pedal
is released under the following con-
ditions:
●The vehicle is stopped
●The driver’s door is not closed
●The driver is not wearing the seat
belt
●The shift lever is in a forward or
reverse position
●The malfunction in dicator lamp or
brake system warning light is not
illuminated
■If “Parking Brake Temporarily
Unavailable” is displayed on
the multi-info rmation display
If the parking brake is operated
repeatedly over a short period of
time, the system may restrict opera-
tion to prevent ove rheating. If this
happens, refrain from operating the
parking brake. Normal operation will
return after about 1 minute.

2474-2. Driving procedures
4
Driving
■If “Parking Brake Unavailable”
is displayed on the multi-infor-
mation display
Operate the parking brake switch. If
the message does not disappear
after operating the switch several
times, the system may be malfunc-
tioning. Have the vehicle inspected
by your Toyota dealer.
■Parking brake operation sound
When the parking brake operates, a
motor sound (whirring sound) may
be heard. This does not indicate a
malfunction.
■Parking brake indicator light
●Depending on the power switch
mode, the parking brake indicator
light will turn on and stay on as
described below:
ON: Comes on until the parking
brake is released.
Not in ON: Stays on for approxi-
mately 15 seconds.
●When the power switch is turned
off with the parking brake set, the
parking brake indicator light will
stay on for about 15 seconds. This
does not indicate a malfunction.
■When the parking brake switch
malfunctions
Automatic mode (automatic brake
setting and releas ing) will be turned
on automatically.
■Parking the vehicle
 P.210
■Parking brake engaged warning
buzzer
A buzzer will sound if the vehicle is
driven with the parking brake
engaged. “Parking Brake ON” is dis-
played on the multi-information dis-
play (with the vehicle reaching a
speed of 3 mph [5 km/h]).
■If the brake system warning
light comes on
 P.464
■Usage in winter time
 P.344
WARNING
■When parking the vehicle
Do not leave a child in the vehicle
alone. The parking brake may be
released unintentionally by a child
and there is the danger of the
vehicle moving that may lead to
an accident resulting in death or
serious injury.
■Parking brake switch
Do not set any objects near the
parking brake switch. Objects
may interfere with the switch and
may lead the parking brake to
unexpectedly operate.
NOTICE
■When parking the vehicle
Before you leave the vehicle, shift
the shift lever to P, set the parking
brake and make s ure that the
vehicle does not move.
■When the system malfunc-
tions
Stop the vehicle in a safe place
and check the warning messages.
■When the parking brake can-
not be released due to a mal-
function
Driving the vehicle with the park-
ing brake set will lead to brake
components overheating, which
may affect braking performance
and increase brake wear. Have
the vehicle inspected by your
Toyota dealer immediately if this
occurs.

2484-2. Driving procedures
Turn the brake hold system on
The brake hold standby indicator
(green) comes on. While the
system is holding the brake, the
brake hold operated indicator (yel-
low) comes on.
■Brake hold system operating
conditions
The brake hold system cannot be
turned on in the following condi-
tions:
●The driver’s doo r is not closed.
●The driver is not wearing the seat
belt. If any of the cond
itions above are
detected when the brake hold sys-
tem is enabled, the system will turn
off and the brake hold standby indi-
cator light will go off. In addition, if
any of the conditions are detected
while the system is holding the
brake, a warning buzzer will sound
and a message will be shown on the
multi-information display. The park-
ing brake will then be set automati-
cally.
■Brake hold function
●If the brake pedal is left released
for a period of about 3 minutes
after the system has started hold-
ing the brake, the parking brake
will be set automatically. In this
case, a warning buzzer sounds
and a message is shown on the
multi-information display.
●To turn the syste m off while the
system is holding the brake, firmly
depress the brake pedal and
press the button again.
●The brake hold function may not
hold the vehicle when the vehicle
is on a steep incline. In this situa-
tion, it may be ne cessary for the
driver to apply the brakes. A warn-
ing buzzer will sound and the
multi-information display will
inform the driver of this situation. If
a warning message is shown on
the multi-information display, read
the message and follow the
instructions.
■When the parking brake is set
automatically while the system
is holding the brakes
Perform any of the following opera-
tions to release the parking brake.
●Depress the accelerator pedal.
(The parking brake will not be
released automatically if the seat
belt is not fastened.)
●Operate the parkin g brake switch
with the brake pedal depressed.
Make sure that the parking brake
indicator light goes off. ( P.245)
Brake Hold
The brake hold system
keeps the brake applied
when the shift lever is in D,
S or N with the system on
and the brake pedal has
been depressed to stop the
vehicle. The system
releases the brake when the
accelerator pedal is
depressed with the shift
lever in D or S to allow
smooth start off.
Enabling the system
A
B

2524-3. Operating the lights and wipers
1With the headlights on, push
the lever away from you to
turn on the high beams.
Pull the lever toward you to the
center position to turn the high
beams off.
2Pull the lever toward you and
release it to flash the high
beams once.
You can flash the high beams with
the headlights on or off.1 Press the Automatic High
Beam switch.
NOTICE
■To prevent 12-volt battery dis-
charge
Do not leave the lights on longer
than necessary when the hybrid
system is not running.
Turning on the high beam
headlights
AHB (Automatic High
Beam)
The Automatic High Beam
uses an in-vehicle front
camera to assess the bright-
ness of streetlights, the
lights of vehicles ahead etc.,
and automatically turns the
high beam on or off as nec-
essary.
WARNING
■Limitations of the Automatic
High Beam
Do not overly rely on the Auto-
matic High Beam. Always drive
safely, taking care to observe
your surroundings and turning the
high beam on or off manually if
necessary.
■To prevent incorrect opera-
tion of the Automatic High
Beam system
Do not overload the vehicle.
Activating the Automatic
High Beam system

2594-3. Operating the lights and wipers
4
Driving
Operating the switch
operates the rear wiper as fol-
lows:
1
*1 or *2 Off
2
*1 or *2 Intermittent
operation
3
*1 or *2 Normal oper-
ation
*1: For the U.S.A.
*2: For Canada
WARNING
■Caution regarding the use of
windshield wipers in “AUTO”
mode (vehicles with rain-
sensing windshield wipers)
The windshield wipers may oper-
ate unexpectedly if the sensor is
touched or the windshield is sub-
ject to vibration in “AUTO” mode.
Take care that y our fingers or
anything else does not become
caught in the windshield wipers.
■Caution regarding the use of
washer fluid
When it is cold, do not use the
washer fluid until the windshield
becomes warm. The fluid may
freeze on the windshield and
cause low visibility. This may lead
to an accident, resulting in death
or serious injury.
NOTICE
■When the washer fluid tank is
empty
Do not operate the switch continu-
ally as the washer fluid pump may
overheat.
■When a nozzle becomes
blocked
In this case, conta ct your Toyota
dealer.
Do not try to clear it with a pin or
other object. The nozzle will be
damaged.
■To prevent 12-volt battery dis-
charge
Do not leave the wipers on longer
than necessary when the hybrid
system is off.
Rear window wiper
and washer
The rear window wiper and
washer can be used by
operating the lever.
NOTICE
■When the rear window is dry
Do not use the wiper, as it may
damage the rear window.
Operating the wiper lever

2634-4. Refueling
4
Driving
slightly in the opposite direction.
■When “Check Fuel Cap” is dis-
played on the multi-information
display
The fuel tank cap may be unfas-
tened or loose. Turn the power
switch off, check the cap and tighten
it securely. If the message remains,
wait a few seconds and then turn
the power switch off once again.
WARNING
■When replacing the fuel tank
cap
Do not use anything but a genu-
ine Toyota fuel tank cap designed
for your vehicle. Doing so may
cause a fire or other incident
which may result in death or seri-
ous injury.

2664-5. Using the driving support systems
WARNING
●Do not attach objects, such as
stickers, transparent stickers,
etc., to the outer side of the
windshield in fr ont of the front
camera (shaded area in the
illustration).
From the top of the windshield
to approximately 0.4 in. (1 cm)
below the bottom of the front
camera
Approximately 7.9 in. (20 cm)
(Approximately 4.0 in. [10 cm]
to the right and left from the
center of the front camera)
●If the part of the windshield in
front of the front camera is
fogged up or covered with con-
densation, or ice, use the wind-
shield defogger to remove the
fog, condensation, or ice.
( P.349)
●If water droplets cannot be
properly removed from the area
of the windshield in front of the
front camera by the windshield
wipers, replace the wiper insert
or wiper blade.
●Do not attach win dow tint to the
windshield.
●Replace the windshield if it is
damaged or cracked.
After replacing the windshield,
the front camera must be recali-
brated. Contact your Toyota
dealer for details.
A
B
●Do not allow liquids to contact
the front camera.
●Do not allow bright lights to
shine into the front camera.
●Do not dirty or damage the front
camera.
When cleaning the inside of the
windshield, do not allow glass
cleaner to contact the lens of
the front camera . Also, do not
touch the lens.
If the lens is dirty or damaged,
contact your Toyota dealer.
●Do not subject the front camera
to a strong impact.
●Do not change the installation
position or direction of the front
camera or remove it.
●Do not disassemble the front
camera.
●Do not modify any components
of the vehicle around the front
camera (inside rear view mirror,
etc.) or ceiling.
●Do not attach any accessories
to the hood, front grille or front
bumper that may obstruct the
front camera. Contact your
Toyota dealer for details.
●If a surfboard or other long
object is to be mounted on the
roof, make sure that it will not
obstruct the front camera.
●Do not modify the headlights or
other lights.

2674-5. Using the driving support systems
4
Driving
■If a warning message is displayed on the multi-information display
A system may be temporarily unava ilable or there may be a malfunction in
the system.
●In the following situations, perform the actions specified in t he table. When
the normal operating conditions are detected, the message will disappear
and the system will be come operational.
If the message does not disapp ear, contact your Toyota dealer.
●In the following situations, if the situation has changed (or the vehicle has
been driven for some time) and the normal operating conditions are
detected, the message will disappear and the system will become opera-
SituationActions
When the area around a camera is
covered with dirt, moisture (fogged
up, covered with condensation, ice,
etc.), or other foreign matterUsing the wiper and A/C function,
remove the dirt and other attached
matter. (P.349)
When the temperature around the
front camera is outside of the opera-
tional range, such as when the vehi-
cle is in the sun or in an extremely
cold environment
If the front camera is hot, such as
after the vehicle had been parked in
the sun, use the air conditioning sys-
tem to decrease the temperature
around the front camera.
If a sunshade was used when the
vehicle was parked, depending on its
type, the sunlight reflected from the
surface of the sunshade may cause
the temperature of the front camera
to become excessively high.
If the front camera is cold, such as
after the vehicle is parked in an
extremely cold environment, use the
air conditioning system to increase
the temperature around the front
camera.
The area in front o f the front camera
is obstructed, such as when the
hood is open or a sticker is attached
to the part of the win dshield in front
of the front camera.
Close the hood, rem ove the sticker,
etc. to clear the obstruction.
When “Pre-Collision System
Unavailable” is displayed.
Check whether there is attached
materials on the radar sensor and
radar sensor cover , and if there is,
remove it.