2022 TOYOTA SIENNA HYBRID engine overheat

15Pictorial index
Outside rear view mirrors .................................................P.199
Adjusting the mirror angle ....................................................P.199
Folding the mirrors ...............................................................P.200
Driving position memory
*.....................................................P.179
Defogging the mirrors
*.........................................................P.350
Windshield wipers .............................................. ...............P.256
Precautions against winter season .............................. ........P.343
To prevent freezing (windshield wiper de-icer)
*...................P.350
Precautions against car wash
(Rain-sensing windshield wipers)
*.......................................P.397
Fuel filler door ............................................... .....................P.261
Refueling method ............................................... ..................P.261
Fuel type/fuel tan k capacity .................................................P.518
Tires ....................................................................................P.421
Tire size/inflation pressure ................................... ................P.523
Winter tires/tire chain ........................................ ...................P.343
Checking/rotation/tire pressur e warning system ..................P.421
Coping with flat tires......................................... ............P.480, 490
Hood ....................................................................................P.410
Opening ........................................................ .......................P.410
Engine oil ..................................................... ........................P.519
Coping with overheat ........................................... ................P.509
Warning messages ..............................................................P.475
Headlights/side marke r lights/parking lights ..................P.250
Turn signal lights ...............................................................P.244
Headlights/daytime running lights .............................. .....P.250
Fog lights
*............................................................... ............P.256
Light bulbs of the exterior lights for driving
(Replacing method: P.448, Watts: P.524)
D
E
F
G
H
I
J
K

17Pictorial index
Opening/closing the rear side windows ...............................P.202
Warning messages ..............................................................P.475
Back door ...................................................... .....................P.150
Locking/unlocking ................................................................P.151
Opening from inside the cabin
*............................................P.154
Opening from outside........................................... ........P.152, 153
Warning messages ..............................................................P.475
Outside rear view mirrors .................................................P.199
Adjusting the mirror angle ..................................... ...............P.199
Folding the mirrors ...............................................................P.200
Driving position memory
*.....................................................P.179
Defogging the mirrors
*.........................................................P.350
Windshield wipers .............................................. ...............P.256
Precautions against winter season .............................. ........P.343
To prevent freezing (windshield wiper de-icer)
*...................P.350
Precautions against car wash
(Rain-sensing windshield wipers)
*.......................................P.397
Fuel filler door ............................................... .....................P.261
Refueling method ............................................... ..................P.261
Fuel type/fuel tan k capacity .................................................P.518
Tires ....................................................................................P.421
Tire size/inflation pressure ................................... ................P.523
Winter tires/tire chain ........................................ ...................P.343
Checking/rotation/tire pressur e warning system ..................P.421
Coping with flat tires......................................... ............P.480, 490
Hood ....................................................................................P.410
Opening ........................................................ .......................P.410
Engine oil ..................................................... ........................P.519
Coping with overheat ........................................... ................P.509
Warning messages ..............................................................P.475
C
D
E
F
G
H

20Pictorial index
Coping with flat tires.....................................................P.480, 490
Hood ....................................................................................P.410
Opening ........................................................ .......................P.410
Engine oil ..................................................... ........................P.519
Coping with overheat ........................................... ................P.509
Warning messages ..............................................................P.475
Headlights/side marker lights .................................. .........P.250
Turn signal lights ...............................................................P.244
Parking lights
*/daytime running lights.............................P.250
Fog lights
*............................................................... ............P.256
Stop lights/tail lights
*.........................................................P.250
Side marker lights
*/tail lights*...........................................P.250
Back-up lights
Shifting the shift lever to R ...................................................P.240
License plate lights........................................... .................P.250
Side turn signal lights
*......................................................P.244
*: If equipped
Light bulbs of the exterior lights for driving
(Replacing method: P .448, Watts: P.524)
H
I
J
K
L
M
N
O
P

992-1. Instrument cluster
2
Vehicle status information and indicators
eration” refers to the conversion of
energy created by the movement
of the vehicle into electrical
energy.
In the following situ ation, the Hybrid
System Indicator does not operate.
●“READY” indicator is not illumi-
nated.
●The shift lever is in a range other
than D or S.
■Outside temperature display
●In the following si tuations, the cor-
rect outside tempe rature may not
be displayed, or the display may
take longer than normal to
change.
• When stopped, or driving at low speeds (less than 12 mph [20
km/h])
• When the outside temperature has changed suddenly (at the
entrance/exit of a garage, tunnel,
etc.)
●When “--” or “E” is displayed, the
system may be malfunctioning.
Take your vehicle to your Toyota
dealer.
●Displays the outside temperature
within the range of -40°F (-40°C)
to 122°F (50°C).
●When the outside temperature is
approximately 37°F (3°C) or
lower, the low outside temperature
indicator will flash for approxi-
mately 10 seconds , then stay on.
■Liquid crystal display
 P.105Switches the items of the odom-
eter, trip meter A, trip meter B
and oil maintenance by pressing
the “ODO TRIP” switch.
When the trip meter is dis-
played, pressing and holding the
switch will reset the trip meter.
WARNING
■The information display at
low temperatures
Allow the interior of the vehicle to
warm up before using the liquid
crystal information display. At
extremely low temperatures, the
display monitor may respond
slowly, and display changes may
be delayed.
For example, there is a lag
between the driver’s shifting and
the new shift range appearing on
the display. This lag could cause
the driver to downshift again,
causing rapid and excessive
engine braking and possibly an
accident resulting in death or
injury.
NOTICE
■To prevent damage to the
engine and its components
The engine may be overheating if
the engine coolant temperature
gauge is in the red zone (“H”). In
this case, immediately stop the
vehicle in a safe place, and check
the engine after it has cooled
completely. ( P.509)
Changing the trip meter
display

1032-1. Instrument cluster
2
Vehicle status information and indicators
energy.
In the following situ ation, the Hybrid
System Indicator does not operate.
●“READY” indicator is not illumi-
nated.
●The shift lever is in a range other
than D or S.
■Outside temperature display
●In the following si tuations, the cor-
rect outside tempe rature may not
be displayed, or the display may
take longer than normal to
change.
• When stopped, or driving at low speeds (less than 12 mph [20
km/h])
• When the outside temperature has changed suddenly (at the
entrance/exit of a garage, tunnel,
etc.)
●When “--” or “E” is displayed, the
system may be malfunctioning.
Take your vehicle to your Toyota
dealer.
●Displays the outside temperature
within the range of -40°F (-40°C)
to 122°F (50°C).
●When the outside temperature is
approximately 37°F (3°C) or
lower, the low outside temperature
indicator will flash for approxi-
mately 10 seconds , then stay on.
■Liquid crystal display
 P.105
■Customization
Settings (e. g. meter display) can be
changed on the screen of the
multi-informat ion display. (P.539)Switches the items of the odom-
eter, trip meter A, trip meter B
and oil maintenance by pressing
the “ODO TRIP” switch.
When the trip meter is dis-
played, pressing and holding the
switch will reset the trip meter.
WARNING
■The information display at
low temperatures
Allow the interior of the vehicle to
warm up before using the liquid
crystal information display. At
extremely low temperatures, the
display monitor may respond
slowly, and display changes may
be delayed.
For example, there is a lag
between the driver’s shifting and
the new shift range appearing on
the display. This lag could cause
the driver to downshift again,
causing rapid and excessive
engine braking and possibly an
accident resulting in death or
injury.
NOTICE
■To prevent damage to the
engine and its components
The engine may be overheating if
the engine coolant temperature
gauge is in the red zone (“H”). In
this case, immediately stop the
vehicle in a safe place, and check
the engine after it has cooled
completely. ( P.509)
Changing the trip meter
display

2144-1. Before driving
WARNING
●Be careful not to shift the shift
lever with the accelerator pedal
depressed.
Shifting the shift lever to a gear
other than P or N may lead to
unexpected rapid acceleration
of the vehicle that may cause an
accident and result in death or
serious injury. Doing so can
damage the transmission and
may result in a loss of vehicle
control.
■If you hear a squealing or
scraping noise (brake pad
wear limit indicators)
Have the brake pads checked and
replaced by your Toyota dealer as
soon as possible.
Rotor damage may result if the
pads are not replaced when
needed.
It is dangerous to drive the vehicle
when the wear limits of the brake
pads and/or those of the brake
discs are exceeded.
■When the vehicle is stopped
●Do not depress t he accelerator
pedal unnecessarily.
If the vehicle is in any gear other
than P or N, the vehicle may
accelerate suddenly and unex-
pectedly, causing an accident.
●In order to prev ent accidents
due to the vehicle rolling away,
always keep depressing the
brake pedal while stopped with
the “READY” indicator is illumi-
nated, and apply the parking
brake as necessary.
●If the vehicle is stopped on an
incline, in order to prevent acci-
dents caused by the vehicle roll-
ing forward or backward, always
depress the brake pedal and
securely apply the parking
brake as needed.
●Avoid revving or racing the
engine.
Running the engine at high
speed while the vehicle is
stopped may cause the exhaust
system to overheat, which could
result in a fire if combustible
material is nearby.
■When the vehicle is parked
●Do not leave glasses, cigarette
lighters, spray cans, or soft
drink cans in the vehicle when it
is in the sun.
Doing so may result in the fol-
lowing:
• Gas may leak from a cigarette lighter or spray can, and may
lead to a fire.
• The temperature inside the vehicle may cause the plastic
lenses and plastic material of
glasses to deform or crack.
• Soft drink cans may fracture, causing the contents to spray
over the interior of the vehicle,
and may also cause a short cir-
cuit in the vehicle’s electrical
components.
●Do not leave cigarette lighters in
the vehicle. If a cigarette lighter
is in a place such as the glove
box or on the floor, it may be lit
accidentally when luggage is
loaded or the se at is adjusted,
causing a fire.
●Do not attach adhesive discs to
the windshield or windows. Do
not place containers such as air
fresheners on the instrument
panel or dashboard. Adhesive
discs or containers may act as
lenses, causing a fire in the
vehicle.

2304-1. Before driving
Avoid jerky starts or sudden
acceleration.
 Avoid jerky steering and
sharp turns, and slow down
before making turn.
 Note that when making a turn,
the trailer wheels will be
closer than the vehicle wheels
to the inside of the turn. Com-
pensate by making a wider
than normal turning radius.
 Slow down before making a
turn, in cross winds, on wet or
slippery surfaces, etc.
Increasing vehicle speed can
destabilize the trailer.
Take care when passing other
vehicles. Passing requires
considerable distance. After
passing a vehicle, do not for-
get the length of your trailer,
and be sure you have plenty
of room before changing
lanes.
 To maintain engine braking
efficiency and charging sys-
tem performance, when using
engine braking, do not use
the transmission in D.
 Instability happens more fre-
quently when descending
steep or long downhill grades.
Before descending, slow
down and downshift. Do not
make sudden downshifts
while descending steep or
long downhill grades.
 Avoid holding the brake pedal down too long or applying the
brakes too frequently. This
could cause the brakes to
overheat and result in
reduced braking efficiency.
 Due to the added load of the
trailer, your vehicle’s hybrid
system may overheat on hot
days (at temperatures over
85°F [30°C]) when driving up
a long or steep grade. If the
engine coolant temperature
gauge indicates overheating,
immediately turn off the air
conditioning (if in use), pull
your vehicle off the road and
stop in a safe spot. ( P.509)
 Always place wheel blocks
under both the vehicle’s and
the trailer’s wheels when
parking. Apply the parking
brake firmly, and put the
transmission in P. Avoid park-
ing on a slope, but if unavoid-
able, do so only after
performing the following:
1 Apply the brakes and keep
them applied.
2 Have someone place wheel
blocks under both the vehi-
cle’s and trailer’s wheels.
3 When the wheel blocks are in
place, release the brakes
slowly until the blocks absorb
the load.
4 Apply the parking brake
firmly.

3374-5. Using the driving support systems
4
Driving
edly, when the hybrid system is
started or just after the vehicle
begins to move. This sound does
not indicate that a malfunction has
occurred in any of these systems.
●Any of the following conditions
may occur when the above sys-
tems are operating. None of these
indicates that a malfunction has
occurred.
• Vibrations may be felt through the
vehicle body and steering.
• A motor sound may be heard also after the vehicle comes to a stop.
■ECB operating sound
ECB operating sound may be heard
in the following cases, but it does
not indicate that a malfunction has
occurred.
●Operating sound heard from the
engine compartment when the
brake pedal is operated.
●Motor sound of the brake system
heard from the front part of the
vehicle when the driver’s door is
opened.
●Operating sound heard from the
engine compartment when one or
two minutes passed after the stop
of the hybrid system.
■Active Cornering Assist opera-
tion sounds and vibrations
When the Active Cornering Assist is
operated, operation sounds and
vibrations may b e generated from
the brake system, but this is not a
malfunction.
■EPS operation sound
When the steering wheel is oper-
ated, a motor sou nd (whirring
sound) may be heard. This does not
indicate a malfunction.
■Automatic reactivation of
TRAC, Trailer Sway Control and
VSC systems
After turning the TRAC, Trailer
Sway Control and VSC systems off,
the systems will be automatically re-
enabled in the following situations:
●When the power switch is turned
off
●If only the TRAC sy stem is turned
off, the TRAC will turn on when
vehicle speed increases
If both the TRAC and VSC sys-
tems are turned of f, automatic re-
enabling will not occur when vehi-
cle speed increases.
■Operating conditions of Active
Cornering Assist
The system operates when the fol-
lowing occurs.
●TRAC/VSC can operate
●The driver is attempting to accel-
erate while turning
●The system detects that the vehi-
cle is drifting to the outer side
●The brake pedal is released
■Reduced effectiveness of the
EPS system
The effect iveness of the EPS sys-
tem is reduced to prevent the sys-
tem from overheating when there is
frequent steering input over an
extended period of time. The steer-
ing wheel may feel heavy as a
result. Should this occur, refrain
from excessive steering input or
stop the vehicle a nd turn the hybrid
system off. The EPS system should
return to normal within 10 minutes.
■Secondary Collision Brake
operating conditions
The system operates when the SRS
airbag sensor de tects a collision
while the vehicle is in motion. How-
ever, the system does not operate
when the components are dam-
aged.
■Secondary Collision Brake
automatic cancellation
The system is automatically can-
celed in any of th e following situa-
tions.
●The vehicle speed drops to
approximately 6 mph (10 km/h).
●A certain amount of time elapses