2023 TOYOTA SIENNA HYBRID warning

2214-1. Before driving
4
Driving
WARNING
■Overloading the vehicle
Do not overload the vehicle. It
may not only cause damage to
the tires, but also degrade steer-
ing and braking ability, resulting in
an accident.
Trailer towing (with-
out towing package)
Toyota does not recom-
mend towing a trailer with
your vehicle. Toyota also
does not recommend the
installation of a tow hitch or
the use of a tow hitch carrier
for a wheelchair, scooter,
bicycle, etc. Your vehicle is
not designed for trailer tow-
ing or for the use of tow
hitch mounted carriers.

2234-1. Before driving
4
Driving
●Dynamic radar cruise control with
full-speed range (P.291)
●PKSB (Parking Support Brake) (if
equipped) ( P.324)
●BSM (Blind Spot Monitor) (if
equipped) ( P.302)
●Intuitive parking assist (if
equipped) ( P.312)
●RCTA (Rear Cross Traffic Alert)
function (if equipped) ( P.308)
●RCD (Rear Camera Detection)
function (if equipped) ( P.320)
WARNING
■Trailer towing precautions
To tow a traile r safely, use
extreme care and drive the vehi-
cle in accordance with the trailer’s
characteristics and operating con-
ditions. Failure to do so could
cause an accident resulting in
death or serious injury. Vehicle
stability and braking performance
are affected by trailer stability,
brake setting and performance,
and the hitch. Your vehicle will
handle differently when towing a
trailer.
■To avoid accident or injury
●Do not exceed the TWR,
unbraked TWR, GCWR, GVWR
or GAWR.
●Vehicles without spare tire: Do
not tow a trailer when the tire
installed is re paired with the
emergency tire puncture repair
kit.
●If the gross trailer weight is over
2000 lb. (907 kg), a sway con-
trol device with sufficient capac-
ity is required.
●Adjust the tongue weight within
the appropriate range. Place
heavier loads as close to the
trailer axle as possible.
●Do not exceed 65 mph (104
km/h), the posted towing speed
limit or the spee d limit for your
trailer as set forth in your trailer
owner’s manual, whichever is
lowest. Slow down sufficiently
before making a turn, in cross
winds, on wet or slippery sur-
face, etc. to help avoid an acci-
dent. If you experience a
vehicle-trailer instability from
reducing a certain speed, slow
down and make sure you keep
your vehicle speed under the
speed of which you experience
the instability.
●Do not make jer ky, abrupt or
sharp turns.
●Do not apply the brakes sud-
denly as you may skid, resulting
in jackknifing and loss of vehicle
control. This is especially true
on wet or slippery surfaces.
●Do not exceed the trailer hitch
assembly weight, gross vehicle
weight, gross axle weight and
trailer tongue w eight capacities.
●Do not use dynamic radar
cruise control with full-speed
range when towing.
●Slow down and downshift
before descending steep or long
downhill grades. Do not make
sudden downshifts while
descending steep or long down-
hill grades.

2244-1. Before driving
■GCWR (Gross Combination
Weight Rating)
The maximum allowable gross
combination weight. The gross
combination weight is the sum
of the total vehicle weight
(including the occupants, cargo
and any optional equipment
installed on the vehicle) and the
weight of the trailer being towed
(including the cargo in the
trailer).
■GVWR (Gross Vehicle
Weight Rating)
The maximum allowable gross
vehicle weight. The gross vehi-
cle weight is the total weight of
the vehicle. When towing a
trailer, it is the sum of the vehi-
cle weight (including the occu-
pants, cargo and any optional
equipment installed on the vehi-
cle) and the tongue weight.
WARNING
●Vehicle-trailer instability is more
likely on steep long downhills.
Before descending steep or
long downhill grades, slow
down and downshift. Do not
make sudden downshifts when
descending steep or long down-
hill grades. Avoid holding the
brake pedal down too long or
applying the brakes too fre-
quently. This could cause the
brakes to overheat and result in
reduced braking efficiency.
●Vehicles with compact spare
tire: Do not tow a trailer when
the compact spare tire is
installed on your vehicle.
■When towing a trailer
Toyota recommends trailers with
brakes that confor m to any appli-
cable federal and state/provincial
regulations.
●If the gross trailer weight
exceeds unbraked TWR, trailer
brakes are required. Toyota rec-
ommends trailers with brakes
that conform to all applicable
federal and state/provincial reg-
ulations.
●Never tap into y our vehicle’s
hydraulic system, as this will
lower the vehicle’s braking
effectiveness.
●Never tow a trailer without using
a safety chain securely attached
to both the traile r and the vehi-
cle. If damage occurs to the
coupling unit or hitch ball, there
is danger of the trailer wander-
ing into another lane.
Towing related terms

2284-1. Before driving
Remove the hitch ball when-
ever you are not towing a
trailer. Remove the trailer
hitch if you do not need it.
After removing the hitch, seal
any mounting holes in the
vehicle body to prevent entry
of any substances into the
vehicle.
Weight carrying ball position:
48.8 in. (1238.8 mm)
Hitch receiver pin hole posi-
tion: 42.5 in. (1079.7 mm)
Use the correct trailer ball for
your application.
Trailer ball load rating
Matches or exceeds the gross
trailer weight rat ing of the trailer.
Ball diameter
Matches the size of the trailer cou-
pler. Most couplers are stamped
with the required t railer ball size.
WARNING
■Hitch
Trailer hitch assemblies have dif-
ferent weight capacities estab-
lished by the hitch manufacturer.
Even though the vehicle may be
physically capable of towing a
higher weight, the operator must
determine the maximum weight
rating of the pa rticular hitch
assembly and never exceed the
maximum weight rating specified
for the trailer hitch. Exceeding the
maximum weight rating set by the
trailer hitch manufacturer can
cause an accident resulting in
death or serious personal injuries.
NOTICE
■When installing a trailer hitch
Use only the position recom-
mended by your Toyota dealer.
Do not install the trailer hitch on
the bumper; this may cause body
damage.
Positions for towing hitch
receiver
Selecting trailer ball
A
B
A
B

2354-2. Driving procedures
4
Driving
■When the ambient temperature
is low, such as during winter
driving conditions
When starting the hybrid system,
the flashing time of the “READY”
indicator may be long. Leave the
vehicle as it is u ntil the “READY”
indicator is steady on, as steady
means the vehicle is able to move.
■Sounds and vibrations specific
to a Hybrid Electric Vehicle
 P.81
■If the 12-volt battery is dis-
charged
The hybrid system cannot be
started using the smart key system.
Refer to P.504 to r estart the hybrid
system.
■Electronic key battery depletion
 P.128
■Conditions affecting operation
 P.166
■Note for the entry function
 P.167
■If there is a mal function in the
smart key system
If “Smart Key System Malfunction
See Owner’s Manual” is displayed
on the multi-informat ion display, the
system may be malfunctioning.
Have the vehicle inspected by your
Toyota dealer immediately.
■If the “READY” indicator does
not come on
In the event that the “READY” indi-
cator does not come on even after
performing the proper procedures
for starting the vehicle, contact your
Toyota dealer immediately.
■If the hybrid system is malfunc-
tioning
 P.86
■When “Check Fuel Cap” is dis-
played on the multi-information
display
 P.264
■Electronic key battery
 P.444
■Operation of the power switch
●If the switch is not pressed shortly
and firmly, the power switch mode
may not change o r the hybrid sys-
tem may not start.
●If attempting to restart the hybrid
system immediately after turning
the power switch to OFF, the
hybrid system may not start in
some cases. Aft er turning the
power switch to OFF, please wait
a few seconds before restarting
the hybrid system.
■Customization
If the smart key system has been
deactivated in a customized setting,
refer to P.503.
WARNING
■When starting the hybrid sys-
tem
Always start the hybrid system
while sitting in the driver’s seat.
Do not depress t he accelerator
pedal while starting the hybrid
system under any circumstances.
Doing so may cause an accident
resulting in dea th or serious
injury.
NOTICE
■When starting the hybrid sys-
tem
If the hybrid system becomes diffi-
cult to start, have your vehicle
checked by your Toyota dealer
immediately.

2374-2. Driving procedures
4
Driving
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

2414-2. Driving procedures
4
Driving
battery charge is low, vehicle speed
is higher than the EV drive mode
operating speed range or accelera-
tor pedal is depressed too much)
may be displayed. Use the EV drive
mode when it becomes available.
■If “EV Mode Deactivated” is
shown on the multi-information
display
The EV drive mode has been auto-
matically canceled. The reason the
EV drive mode is not available (the
battery charge is low, vehicle speed
is higher than the EV drive mode
operating speed range or accelera-
tor pedal is depressed too much)
may be displayed. Drive the vehicle
for a while before attempting to turn
on the EV drive mode again.
*1: To improve fuel efficiency and reduce noise, shift the shift lever
to D for normal driving.
*2: By selecting shift ranges using S mode, you can control accelerat-
ing force and engine braking
force.
■When driving with dynamic
radar cruise control with full-
speed range activated
Even when perform ing the following
actions with the intent of enabling
engine braking, engine braking will
not activate because dynamic radar
cruise control with full-speed range
will not be canceled.
●While driving in S mode, down-
shifting to 5 or 4. ( P.244)
●When switching th e driving mode
to sport mode while driving in D
position. ( P.334)
WARNING
■Caution while driving
When driving in EV drive mode,
pay special attention to the area
around the vehicle. Because
there is no engine noise, pedestri-
ans, people riding bicycles or
other people and vehicles in the
area may not be aware of the
vehicle starting off or approaching
them, so take extra care while
driving. Therefore, take extra care
while driving even if the Acoustic
Vehicle Alerting System is active.
Hybrid transmission
Select the shift position
depending on your purpose
and situation.
Shift position purpose
and functions
Shift
positionObjective or function
P
Parking the vehi-
cle/starting the hybrid system
RReversing
NNeutral
DNormal driving*1
SS mode driving*2

2424-2. Driving procedures
■Restraining sudden start (Drive-
Start Control)
 P.211
While the power switch
is in ON and the brake pedal
depressed
*, shift the shift lever
while pushing the shift release
button on the shift knob.
Shift the shift lever while
pushing the shift release button
on the shift knob.
Shift the shift lever nor-
mally.
When shifting the shift lever
between P and D, make sure that
the vehicle is completely stopped
and the brake pedal is depressed.
*: For the vehicle to be able to be shifted from P, the brake pedal
must be depressed before the
shift release button is pushed. If
WARNING
■When driving on slippery
road surfaces
Be careful of downshifting and
sudden acceleration, as this could
result in the vehicle skidding to
the side or spinning.
NOTICE
■Hybrid battery (traction bat-
tery) charge
If the shift lever is in N, the hybrid
battery (traction battery) will not
be charging, even when the
engine is running. Therefore, if
the vehicle is left with the shift
lever in N for a long period of
time, the hybrid battery (traction
battery) will discharge, and this
may result in the vehicle not being
able to start.
Shifting the shift lever