2023 TOYOTA TUNDRA HYBRID battery

1964-2. Driving procedures
Owners Manual_USA_M0C052_en
■Starting the hybrid system by
starter motor
●When the fuel lid is opened and
closed (such as re-fueling)
●When the outside temperature is
extremely cold (th e hybrid system
may be started by starter motor)
■Sounds and vibrations specific
to a Hybrid Electric Vehicle
 P. 7 5
■If the 12-volt battery is dis-
charged
The hybrid system cannot be started
using the smart key system. Refer
to P.529 to restart the hybrid sys-
tem.
■Electronic key battery depletion
 P. 1 1 0
■Conditions affecting operation
 P. 1 3 0
■Notes for the entry function
 P. 1 3 0
■If “Smart Key System Malfunc-
tion See Owner’s Manual” is
displayed on the multi-informa-
tion display
The system may be malfunctioning.
Have the vehicle inspected by your
Toyota dealer immediately.
■When “Check Fuel Cap” is dis-
played on the multi-information
display
 P. 2 2 3
■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. 5 1 1
■Electronic key battery
 P.484
■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. After turning the
power switch to OF F, 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.527.
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 death o r serious injury.

1994-2. Driving procedures
Owners Manual_USA_M0C052_en
4
Driving
the power switch will automatically
turn to OFF. However, this function
cannot entirely prevent the 12-volt
battery discharge. Do not leave the
vehicle with the power switch in
ACC or ON for long periods of time
when the hybrid system is not oper-
ating.
If the hybrid system is stopped
with the shift lev er in a position
other than P, the power switch
will not be turned to OFF. Per-
form the following procedure to
turn the switch to OFF:
1 Check that the parking brake
is set.
2 Shift the shift lever to P.
3 Check that “IGNITION ON” is
displayed on the multi-infor-
mation display and press the
power switch shortly and
firmly. 4
Check that “ACCESSORY”
or “IGNITION ON” on the
multi-information display is
off.
NOTICE
■To prevent 12-volt battery dis-
charge
●Do not leave the power switch
in ACC or ON for long periods of
time without the hybrid system
on.
●If “ACCESSORY” or “IGNITION
ON” is displayed on the meter,
the power switch is not off. Exit
the vehicle after turning the
power switch off.
When stopping the hybrid
system with the shift lever
in a position other than P
NOTICE
■To prevent 12-volt battery dis-
charge
Do not stop the hybrid system
when the shift lever is in a position
other than P. If the hybrid system
is stopped in another shift lever
position, the power switch will not
be turned OFF and remained to
ON. If the vehicle is left in ON, 12-
volt battery discharge may occur.

2124-3. Operating the lights and wipers
Owners Manual_USA_M0C052_enand may cause the automatic head-
light system to malfunction.
■Automatic light off system
●When the headlights are on: The
headlights and tail
lights turn off
30 seconds after the driver’s door
is opened and clos ed if the power
switch is turned to ACC or off.
(The lights turn off immediately if
on the key is pressed after all
the doors are closed.)
●When only the tail lights are on:
The tail lights tu rn off automati-
cally if the power switch is turned
to ACC or OFF and the driver’s
door is opened.
To turn the lights on again, turn the
power switch to ON, or turn the light
switch off once and then back to or .
■Light reminder buzzer
A buzzer sounds when the power
switch is turned to ACC or OFF and
the driver’s door is opened while the
lights are turned on.
■When unlock the doors (wel-
come lamp) (If equipped)
When the doors are unlocked using
the entry function or wireless remote
control, the front parking lights and
tail lights turn o n automatically.
When the light switch is in the AUTO
position and the surrounding area is
dark, this function will operate.
■Automatic headlight leveling
system (if equipped)
The level of the headlights is auto-
matically adjusted according to the
number of passengers and the load-
ing condition of the vehicle to
ensure that the headlights do not
interfere with other road users.
■Windshield wiper linked head-
light illumination
When driving during daytime with
the headlight swit ch turned to , if the windshield wipers are
used, the headlights will turn on
automatically after several seconds
to help enhance the visibility of your
vehicle.
■12-volt battery-saving function
In order to prevent the 12-volt bat-
tery of the vehicle from discharging,
if the headlights and/or tail lights are
on when the power switch is turned
to OFF the 12-volt battery-saving
function will operate and automati-
cally turn off all the lights after
approximately 20 minutes. When
the power switch is turned to ON,
the 12-volt battery-saving function
will be disabled.
When any of the following are per-
formed, the 12-volt battery-saving
function is canceled once and then
reactivated. All the lights will turn off
automatically 20 minutes after the
12-volt battery-saving function has
been reactivated:
●When the headlight switch is oper-
ated
●When a door is opened or closed
■Customization
Some functions can be customized.
(  P.561)
NOTICE
■To prevent 12-volt battery dis-
charge
Do not leave the lights on longer
than necessary when the hybrid
system is not operating.

2214-3. Operating the lights and wipers
Owners Manual_USA_M0C052_en
4
Driving
mode while the powe r switch is in
ON, the wipers will operate once
to show that AUTO mode is acti-
vated.
●If the temperature of the raindrop
sensor is 185°F (85°C) or higher,
or 5°F (-15°C) or lower, automatic
operation may not occur. In this
case, operate the wipers in any
mode other than AUTO mode.
■If no windshield washer fluid
sprays
Check that the wash er nozzles are
not blocked if there is washer fluid in
the windshield washer fluid reser-
v oi r.
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 your fingers or any-
thing else do 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 there is no washer fluid
spray from the nozzle
Damage to the washer fluid pump
may be caused if the lever is
pulled toward you and held con-
tinually.
■When a nozzle becomes
blocked
In this case, contact 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.

2354-5. Using the driving support systems
Owners Manual_USA_M0C052_en
4
Driving
■Operational conditions for e ach pre-collision function
The pre-collision syst em is enabled and the system determines t hat the pos-
sibility of a frontal c ollision with a detected object is high.
The system may not operate in the following situations:
• If a 12-volt battery terminal has been di sconnected and reconn ected and
then the vehicle has not been dr iven for a certain amount of time
• If the shift lever is in R
• When the VSC OFF indicator is illuminated (only the pre-collision warning
function will be operational)
The operation speeds and operati on cancelation for each function is listed
below.
●Pre-collision warning
While the pre-collision warning function is operating, if the steering wheel is
operated heavily or suddenly, the pre-collis ion warning may be canceled.
●Pre-collision brake assist
●Pre-collision braking
If either of the following occur while the pre-collision braking function is oper-
ating, it will be canceled:
• The accelerator pedal is depressed strongly.
Detectable objectsVehicle speedRelative speed between
your vehicle and object
VehiclesApprox. 7 to 110 mph
(10 to 180 km/h)Approx. 7 to 110 mph
(10 to 180 km/h)
Bicyclists and pedestri-
ansApprox. 7 to 50 mph (10
to 80 km/h)Approx. 7 to 50 mph (10
to 80 km/h)
Detectable objectsVehicle speedRelative speed between your vehicle and object
VehiclesApprox. 20 to 110 mph
(30 to 180 km/h)Approx. 20 to 110 mph
(30 to 180 km/h)
Bicyclists and pedestri-
ansApprox. 20 to 50 mph
(30 to 80 km/h)Approx. 20 to 50 mph
(30 to 80 km/h)
Detectable objectsVehicle speedRelative speed between your vehicle and object
VehiclesApprox. 7 to 110 mph
(10 to 180 km/h)Approx. 7 to 110 mph
(10 to 180 km/h)
Bicyclists and pedestri-
ansApprox. 7 to 50 mph (10
to 80 km/h)Approx. 7 to 50 mph (10
to 80 km/h)

3084-5. Using the driving support systems
Owners Manual_USA_M0C052_en
The estimated course
lines move even
though the steering
wheel is straightThere is a malfunction in
the signals being output
by the steering sensor.Have the vehicle
inspected by your Toy-
ota dealer.
Guide lines are not dis-
playedThe tailgate is open.
Close the tailgate.
If this does not resolve
the symptom, have the
vehicle inspected by
your Toyota dealer.
is displayed
12-volt battery has
been reinstalled.
 The steering wheel
has been moved while
the 12-volt battery was
being reinstalled.
 12-volt battery power
is low.
 The steering sensor
has been reinstalled.
 There is a malfunction
in the signals being
output by the steering
sensor.
Stop the vehicle, and
turn the steering wheel
as far as it will go to the
left and right.
If this does not resolve
the symptom, have the
vehicle inspected by
your Toyota dealer.
SymptomLikely causeSolution

3424-5. Using the driving support systems
Owners Manual_USA_M0C052_en
The estimated course
lines move even though
the steering wheel is
straightThere is a malfunction
in the signals being out-
put by the steering sen-
sor.Have the vehicle
inspected by your Toy-
ota dealer.
Guide lines are not dis-
playedThe tailgate is open.
Close the tailgate.
If this does not resolve
the symptom, have the
vehicle inspected by
your Toyota dealer.
is displayed
12-volt battery has
been reinstalled.
 The steering wheel
has been moved while
the 12-volt battery
was being reinstalled.
 12-volt battery power
is low.
 The steering sensor
has been reinstalled.
 There is a malfunction
in the signals being
output by the steering
sensor.
Have the vehicle
inspected by your Toy-
ota dealer.
The panoramic view dis-
play cannot be magni-
fied
The intuitive parking
assist may be malfunc-
tioning or dirty.Follow the correction
procedures for malfunc-
tions of the intuitive
parking assist. ( P.274)
The see-through
view/moving view can-
not be displayed
SymptomLikely causeSolution

3814-5. Using the driving support systems
Owners Manual_USA_M0C052_en
4
Driving
8 For confirmation, repeat
steps 6 and 7 until desired
“gain” setting is reached (just
below point of trailer wheel
lock-up).
■When setting the “gain”
Wheel lock-up occurs when the
trailer wheel squeals or tire smoke
occurs. Trailer wheels may not lock-
up while driving heavily loaded
trailer. During this case, adjust the
Trailer “gain” to the highest allow-
able setting for the towing condition.
■When disconnecting and recon-
necting 12-volt battery termi-
nals
The “gain” setting data will be reset.
■Trailer Sway Control Function
Helps suppress trailer sway at an
early stage by using the trailer brake
control system to operate the trailer
brakes.
■If the Trailer brake warning light
comes on
Indicates a malfunction in the Trailer
brake control system or Trailer con-
nector circuit.
Have the vehicle inspected by your
Toyota dealer immediately.
WARNING
■Trailer brake type setting
It is the responsibility of the driver
to make sure the trailer brakes
are functioning normally and
adjusted appropriately. Failure to
check and maintain trailer brakes
may result in loss of vehicle con-
trol, crash, or serious injury.
Trailer brake control system will
work with most electric and elec-
tric-overhydraulic trailer braking
systems up to 3 axles (24A output
to trailer brakes). Please be sure
to test compatibility with the sys-
tem at low speeds and in a safe
area. If a warning message
appears in the multi-information
display ( P.511), have the vehi-
cle inspected by your Toyota
dealer immediately. Some elec-
tric-over-hydraulic trailer brakes
will take some minimum output to
activate. Trailer brake control sys-
tem will not work with trailer
hydraulic surge brakes.