2023 TOYOTA SEQUOIA HYBRID battery

811-4. Hybrid system
Owners Manual_USA_M0C043_en
1
For safety and security
There are the air intake vents
both sides of the behind the sec-
ond seat for the purpose of cool-
ing the hybrid battery (traction
battery). If the vents becomes
blocked, the hybrid battery (trac-
tion battery) input and output
may be reduced. When a certain level of impact is
detected by the impact sensor,
the emergency shut off system
blocks the high voltage current
and stops the fuel pump to mini-
mize the risk of electrocution
and fuel leakage. If the emer-
gency shut off system activates,
your vehicle will not restart. To
restart the hybrid system, con-
tact your Toyota dealer.
A message is automatically dis-
played when a malfunction
occurs in the hybrid system or
an improper operation is
attempted.
If a warning message is shown
on the multi-information display,
NOTICE
■Hybrid battery (traction bat-
tery) air intake vents
Do not carry large amounts of
water such as water cooler bottles
in the vehicle. If water spills onto
the hybrid battery (traction bat-
tery), the batte ry may be dam-
aged. Have the vehicle inspected
by your Toyota dealer.
Hybrid battery (traction
battery) air intake vents
NOTICE
■Hybrid battery (traction bat-
tery) air intake vents
●Make sure that the air intake
vents are not blocked, such as
by a seat cover, plastic cover, or
luggage. If the vents are
blocked, the hybrid battery
(traction battery) input and out-
put may be restricted, possibly
leading to a malfunction.
●Clean the air intake vents regu-
larly to prevent the hybrid bat-
tery (traction b attery) from
overheating.
●Do not get water or foreign
materials in the air intake vents
as this may cause a short circuit
and damage the hybrid battery
(traction battery).
●A filter is installed to the air
intake vents. When the filter
remains noticeably dirty even
after cleaning the air intake
vents, filter cleaning or replace-
ment is recommended. Refer to
P.489 for details on how to
clean the filters.
Emergency shut off sys-
tem
Hybrid warning message

821-4. Hybrid system
Owners Manual_USA_M0C043_en
read the message and follow the
instructions.
■If a warning light comes on, a
warning message is displayed,
or the 12-volt battery is discon-
nected
The hybrid system may not start. In
this case, try to start the system
again. If the “READY” indicator does
not come on, contact your Toyota
dealer.

851-5. Theft deterrent system
Owners Manual_USA_M0C043_en
1
For safety and security
■Triggering of the alarm
The alarm may be triggered in the
following situations:
(Stopping the alarm deactivates the
alarm system.)
●The doors are unlocked using the
mechanical key.
●When a person remaining in the
vehicle opens a door, the back
door, hood, unlocks, turns the
power switch to ON, or starts the
hybrid system.
●The 12-volt battery is recharged or
replaced when the vehicle is
locked. ( P.540)
■Alarm-operated door lock
In the following cases, depending
on the situation, th e door may auto-
matically lock to p revent improper
entry into the vehicle:
●When a person remaining in the
vehicle unlocks the door and the
alarm is activated.
●While the alarm i s activated, a
person remaining in the vehicle
unlocks the door.
●When recharging or replacing the
12-volt battery.
If a door is unlocked with the
mechanical key while the alarm
is being set, the pre-alarm will
sound for 10 seconds.
After pre-alarm sounding for 10
seconds, alarm will sound.
Do any of the following in order
to deactivate or stop the pre-
alarm:
 Close the doors, and lock all
doors by smart key system or
wireless remote control.
 Unlock the doors or open the
back door using the entry
function or wireless remote
control.
 Start the hybrid system. (After
the alarm will be activated, it
will be deactivated and stop
after a few seconds.)
NOTICE
■To ensure the system oper-
ates correctly
Do not modify or remove the sys-
tem. If modified or removed, the
proper operation of the system
cannot be guaranteed.
Pre-alarm

952-1. Instrument cluster
Owners Manual_USA_M0C043_en
2
Vehicle status information and indicators
■Display items
 Odometer
Displays the total distance the vehi-
cle has been driven.
 Trip meter A/Trip meter B
Displays the distance the vehicle
has been driven since the meter
was last reset. Trip meters A and B
can be used to record and display
different distances independently.
Distance until next engine oil
change
Displays the distance the vehicle
can be driven until an oil change is
necessary.
■Changing the display
Each time the “ODO TRIP”
switch is pressed, the displayed
item will be changed. When the
trip meter is displayed, pressing
and holding the switch will reset
the trip meter.
WARNING
For example, there is a lag
between the driver’s shifting and
the new gear number appearing
on the display. This lag could
cause the driver to downshift
again, causing rapid and exces-
sive engine braking and possibly
an accident resulting in death or
injury.
NOTICE
■To prevent damage to the
engine and its components
●Do not let the i ndicator needle
of the tachomete r enter the red
zone, which indicates the maxi-
mum engine speed.
●The engine may be overheating
if the engine coolant tempera-
ture 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.543)
■Voltmeter
When the voltmeter indicates 19
V or higher or 9 V or lower while
the hybrid system is operating,
there may be a 12- volt battery or
charging system malfunction.
Have the vehicle inspected at
your Toyota dealer.
■Engine oil pressure gauge
When the value of the engine oil
pressure gauge drops while the
engine is running, stop the vehicle
in a safe place immediately and
check the amoun t of engine oil.
(  P.466)
When the oil pressure drops even
though the engine oil amount has
not decreased, or i f the oil pres-
sure does not increase when
engine oil is added, contact your
Toyota dealer, as there may be a
problem with the lubrication sys-
tem.
Odometer and trip meter
display

1032-1. Instrument cluster
Owners Manual_USA_M0C043_en
2
Vehicle status information and indicators
error continues, contact your Toy-
ota dealer.
■Vehicle functions and set-
tings that can be changed
 P.570
■Suspension of the settings dis-
play
●Some settings cannot be changed
while driving. When changing set-
tings, park the vehicle in a safe
place.
●If a warning message is displayed,
operation of the settings display
will be suspended.
Select to display warning mes-
sages and measures to be
taken if a malfunction is
detected. ( P.519)
WARNING
■Cautions during setting up
the display
If the hybrid system is operating
when changing the display set-
tings, ensure that the vehicle is
parked in a place with adequate
ventilation. In a closed area such
as a garage, exhaust gases
including harmful carbon monox-
ide (CO) may collect and enter
the vehicle. This may lead to
death or a seri ous health hazard.
NOTICE
■During setting up the display
To prevent 12-volt battery dis-
charge, ensure that the hybrid
system is operating while setting
up the display features.
Warning message display

1062-1. Instrument cluster
Owners Manual_USA_M0C043_en
■Enabling/disabling of the head-
up display
If the head-up display is disabled, it
will remain disabled when the power
switch is turned off then back to ON.
■Display brightness
The brightness of the head-up dis-
play can be adjusted on of the
multi-information display. Also, it is
automatically adjusted according to
the ambient brightness.
■Driving support system sta-
tus display
Displays the operational status
of the following systems: 
LTA (Lane Tracing Assist)
( P.261)
 Dynamic radar cruise control
with full-speed range
( P.275)
Details of content d isplayed on the
head-up display may differ from
that displayed on the multi-informa-
tion display. For details, refer to the
explanation of each system.
■Navigation system-linked
display area
Displays the following items
which are linked to the naviga-
tion system:
 Street name
 Route guidance to destination
 Compass (heading-up dis-
play)
Pop-up displays for the following
systems will be displayed when
necessary:
■Driving support systems
Displays a warning/sugges-
tion/advice message or the
operating state of a relevant
system.
 PCS (Pre-Colli sion System)
( P.249)
 LTA (Lane Tracing Assist)
( P.261)
 PKSB (Parking Support
Brake) (If equipped) ( P.307)
WARNING
■Caution for changing settings
of the head-up display
If the hybrid system is operating
when changing the display
settings, ensure t hat the vehicle
is parked in a place with adequate
ventilation. In a closed area such
as a garage, exhaust gases
including harmful carbon monox-
ide (CO) may collect and enter
the vehicle. This may lead to
death or a seri ous health hazard.
NOTICE
■When changing the settings
of the head-up display
To prevent 12-volt battery dis-
charge, ensure that the hybrid
system is operating while chang-
ing the settings of the head-up
display.
Driving support system
status/navigation system-
linked display area
Pop-up display

1123-1. Key information
Owners Manual_USA_M0C043_en
3-1.Key information
The following keys are provided
with the vehicle.Electronic keys
• Operating the smart key system ( P.139)
• Operating the wireless remote control function ( P. 1 1 3 )
Mechanical keys
Key number plate
■When riding in an aircraft
When bringing an electronic key
onto an aircraft, make sure you do
not press any buttons on the elec-
tronic key while inside the aircraft
cabin. If you are carrying an elec-
tronic key in your bag, etc., ensure
that the buttons are not likely to be
pressed accidentally. Pressing a
button may cause the electronic key
to emit radio waves that could inter-
fere with the oper ation of the air-
craft.
■Electronic key battery depletion
●The standard battery life is 1 to 2
years.
●If the battery becomes low, an
alarm will sound in the cabin and a
message will be s hown on the
multi-information display when the hybrid system is stopped.
●To reduce key battery depletion
when the electronic key is to not
be used for long periods of time,
set the electronic key to the bat-
tery-saving mode. (
P.141)
●As the electronic key always
receives radio waves, the battery
will become depleted even if the
electronic key is not used. The fol-
lowing symptoms indicate that the
electronic key battery may be
depleted. Replace the battery
when necessary.
• The smart key system or the wire- less remote contro l does not oper-
ate.
• The detection area becomes smaller.
• The LED indicator on the key sur- face does not turn on.
●To avoid serious deterioration, do
not leave the electronic key within
3 ft. (1 m) of the following electri-
cal appliances that produce a
magnetic field:
•TVs
• Personal computers
• Cellular phones, cordless phones and battery chargers
• Recharging cellular phones or cordless phones
• Table lamps
• Induction cookers
■Replacing the battery
 P.493
■Confirmation of the number of
registered keys
The number of keys already regis-
tered to the vehi cle can be con-
firmed. Ask your Toyota dealer for
details.
■If “A New Key has been Regis-
tered Contact Your Dealer for
Details” is shown on the multi-
information display
This message will be displayed
each time the driver’s door is
opened when the doors are
unlocked from the outside for
Keys
The keys

1143-1. Key information
Owners Manual_USA_M0C043_en
■Theft deterrent panic mode
When is pressed for longer
than about one second, an alarm
will sound intermittently and the
vehicle lights will f lash to deter any
person from trying to break into or
damage your vehicle.
To stop the alarm, press any button
on the electronic key.
To take out the mechanical key,
slide the release lever and
take the key out.
The mechanical key can only be
inserted in one direction, as the key
only has grooves on one side. If the
key cannot be inserted in a lock cyl-
inder, turn it over and re-attempt to
insert it.
After using the mechanical key,
store it in the electronic key. Carry
the mechanical k ey together with
the electronic key. If the electronic
key battery is dep leted or the entry
function does not operate properly,
you will need the m echanical key.
(  P.535)
■When required to leave the
vehicle’s key wi th a parking
attendant
Remove the mechanical key for
your own use and p rovide the atten-
dant with the elec tronic key only.
■If you lose your mechanical
keys
 P.534
■If a wrong key is used
The key cylinder rotates freely, iso-
lated from the internal mechanism.Using the mechanical key