2023 TOYOTA TUNDRA HYBRID ECU

1433-4. Adjusting the steering wheel and mirrors
Owners Manual_USA_M0C052_en
3
Before driving
3-4.Adjusting the steering wheel and mirrors
Manual adjustment type
1 Hold the steering wheel and
push the lever down.
2 Adjust to the ideal position by
moving the steering wheel
horizontally and vertically.
After adjustment, pull the lever up
to secure the steering wheel.
Power adjustment type
Operating the switch moves the
steering wheel in the following
directions: 1
Up
2 Down
3 Toward the driver
4 Away from the driver
■The steering wheel can be
adjusted when (power adjust-
ment type)
The power switch is in ACC or ON
*.
*: If the driver’s seat belt is fastened, the steering wheel can be
adjusted regardless of power
switch mode.
■Automatic tilt-away & returning
function (if equipped)
When the power switch is turned off,
the steering wheel is automatically
adjusted to a posit ion that allows
driver to enter and exit the vehicle
easily.
When the power switch has been
turned ACC or ON, the steering
wheel automatically returns to the
original position.
■Automatic adjustment of the
steering positi on (if equipped)
A desired steering position can be
Steering wheel
Adjustment procedure

1443-4. Adjusting the steering wheel and mirrors
Owners Manual_USA_M0C052_enentered to memory and recalled
automatically by the driving position
memory system. (
P.137)
■Power easy access system (if
equipped)
The steering wheel and driver’s seat
move in accordance with power
switch mode and the driver’s seat
belt condition. ( P.137)
■After adjusting the steering
wheel (manual adjustment type)
Make sure that the steering wheel is
securely locked.
The horn may not sound if the steer-
ing wheel is not securely locked.
■Customization
Some functions can be customized.
(  P.561)
Press on or close to the
mark.
WARNING
■Caution while driving
Do not adjust the steering wheel
while driving.
Doing so may cause the driver to
mishandle the vehicle and cause
an accident, resul ting in death or
serious injury.
■After adjusting the steering
wheel (manual adjustment
type)
Make sure that the steering wheel
is securely locked. Otherwise, the
steering wheel may move sud-
denly, possibly causing an acci-
dent, resulting in death or serious
injury.
Sounding the horn

1754-1. Before driving
Owners Manual_USA_M0C052_en
4
Driving
WARNING
●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 caus e 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 seat 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.
●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 a s 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
unattended while the hybrid
system is operating.
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.
●4WD models: If the shift lever is
moved before the “4L” indicator
turns on/off, the transfer mode
may not be shifted completely.
The transfer mode disengages
both the front and rear drivesh-
afts from the p owertrain and
allows the vehicle to move
regardless of the shift position.
(At this time, the indicator blinks
and the buzzer sounds.)
Therefore, the vehicle is free to
roll even if the automatic trans-
mission is in P. You or someone
else could be seriously injured.
You must complete the shifting
of the transfer mode. ( P.361)

1764-1. Before driving
Owners Manual_USA_M0C052_en
WARNING
■When taking a nap in the vehi-
cle
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 electroni cally controlled
brake does not operate, do not
follow other vehicl es 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
Do not spin the wheels exces-
sively when a driven wheel 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.
■When parking the vehicle
Always set the parking brake and
shift the shift lever to P. Failure to
do so may cause the vehicle to
move or the vehicle may acceler-
ate suddenly if t he accelerator
pedal is accidentally depressed.
■Avoiding damage to vehicle
parts
●Do not turn the steering wheel
fully in either direction and hold
it there for an extended period
of time.
Doing so may damage the
power steering motor.
●When driving over bumps in the
road, drive as slowly as possible
to avoid damaging the wheels,
underside of the vehicle, etc.

1794-1. Before driving
Owners Manual_USA_M0C052_en
4
Driving
be C lb. (kg) as follows:
B
*2 lb. (kg) - A*1 lb. (kg) = C*3 lb.
(kg)
*1: A =Weight of people
*2: B =Total load capacity
*3: C =Available cargo and luggage load
In this condition, if 3 more passen-
gers with the combined weight of D
lb. (kg) get on, the available cargo
and luggage load will be reduced E
lb. (kg) as follows:
C lb. (kg) - D*4 lb. (kg) = E*5 lb.
(kg)
*4: D =Additional weight of people
*5: E =Available cargo and luggage load
As shown in the example above,
if the number of occupants
increases, the cargo and lug-
gage load will be reduced by an
amount that equals the
increased weight due to the
additional occupants. In other
words, if an increase in the num-
ber of occupants causes an
excess of the total load capacity
(combined weight of occupants
plus cargo and luggage load),
you must reduce the cargo and
luggage on your vehicle.
WARNING
■Things that must not be car-
ried in the luggage compart-
ment
The following things may cause a
fire if loaded in the luggage com-
partment:
●Receptacles containing gaso-
line
●Aerosol cans
■Storage precautions
Observe the following precau-
tions.
Failure to do so may prevent the
pedals from being depressed
properly, may block the driver’s
vision, or may res ult in items hit-
ting the driver or passengers, pos-
sibly causing an accident.
●Do not stack anything behind
the front seats higher than the
seatbacks.
●Do not place cargo or luggage
in or on the follo wing locations.
• At the feet of the driver
• On the front passenger or rear seats (when stacking items)
• On the instrument panel
• On the dashboard
• On the auxiliary b ox or tray that
has no lid
●Secure all items in the occupant
compartment.
●Never allow anyon e to ride in
the rear deck. It is not designed
for passengers. They should
ride in their seats with their seat
belts properly fastened. Other-
wise, they are much more likely
to suffer death or serious bodily
injury, in the event of sudden
braking, sudden swerving or an
accident.
■Capacity and distribution
●Do not exceed the maximum
axle weight rating or the total
vehicle weight rating.

1824-1. Before driving
Owners Manual_USA_M0C052_en
■Trailer brake controller
 P. 3 8 0
■Before towing
Check that the following conditions
are met:
●Ensure that your vehicle’s tires
are properly inflated. ( P.547)
●Trailer tires are inflated according
to the trailer manufacturer’s rec-
ommendation.
●All trailer lights work as required
by law.
●All lights work each time you con-
nect them.
●The trailer ball is set at the proper
height for the coupler on the
trailer.
●The trailer is level when it is
hitched. Do not dri ve if the trailer
is not level, and check for
improper tongue weight, overload-
ing, worn suspension, or other
possible causes.
●The trailer cargo is securely
loaded.
●The rear view mirrors conform to
all applicable federal, state/provin-
cial or local regu lations. If they do
not, install rear view mirrors
appropriate for towing purposes.
Contact your Toyota dealer for
further information about addi-
tional requirements such as a
towing kit, etc.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 brak ing 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.
●If the gross trailer weight is over
2000 lb. (900 kg), a sway con-
trol device with sufficient capac-
ity is required.
●If the gross trailer weight is over
5000 lb. (2200 kg), a weight dis-
tributing hitch with sufficient
capacity 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 hel p 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.

1834-1. Before driving
Owners Manual_USA_M0C052_en
4
Driving
WARNING
●Do not make jerk y, 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 th e trailer hitch
assembly weight, gross vehicle
weight, gross axle weight and
trailer tongue weight capacities.
●Do not use the following sys-
tems when your vehicles is tow-
ing a trailer or a nother vehicle.
• PCS (Pre-Collision System)
• Dynamic radar cruise control with full-speed range
Except when the following condi-
tions are all met,
• When the other vehicle is a trailer properly attached and
connected to Toyota’s official
TBC ECU.
• When the vehicle is not being driven on a slippery surface
such as an icy road or a very
wet road.
●Do not use the following sys-
tems when your vehicles is tow-
ing a trailer or a nother vehicle.
• Cruise control (if equipped)
• LTA (Lane Tracing Assist)
If the vehicle detects that a trailer
is being towed, the lane centering
function of LTA is automatically
turned off.
●Slow down and downshift
before descending steep or long
downhill grades. Do not make
sudden downshifts while
descending steep or long down-
hill grades.
●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.
●Do not tow a trailer when the
temporary spare tire is installed
on your vehicle.
■When towing a trailer
Toyota recommends trailers with
brakes that conform to any appli-
cable federal and s tate/provincial
regulations.
●If the gross tr ailer 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 your vehicle’s
hydraulic system, as this will
lower the vehicle’s braking
effectiveness.
●Never tow a traile r without using
a safety chain securely attached
to both the trailer 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.

2144-3. Operating the lights and wipers
Owners Manual_USA_M0C052_en
1*1 or *2 Turns the
front fog lights off
2 Turns the front fog lights
on
*1: U.S.A.
*2: Canada
■Fog lights can be used when
The parking lights are on or the
headlights are on in low beam.
*: If equipped
1 Press the Automatic High
Beam switch.
Fog light switch
The fog lights secure excel-
lent visibility in difficult driv-
ing conditions, such as in
rain and fog.
Operating instructions
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
beams on or off manually if nec-
essary.
■To prevent inc orrect opera-
tion of the Automatic High
Beam system
Do not overload the vehicle.
Activating the Automatic
High Beam