2023 TOYOTA TUNDRA HYBRID Owners Manual

3694-5. Using the driving support systems
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4
Driving
turn on.
2 Select the Multi-terrain Select
modes on the multi-informa-
tion display while turning the
mode select switch left and
right.
Depending on the positions of the
front-wheel drive control switch, a
mode can be selected from among
the following modes.
Front-wheel drive control
switch is in “4L”
If the brake control has activated,
the slip indicator light will flash.
Front-wheel drive control
switch is in “4H”
If the brake control has activated,
the slip indicator light will flash.
When the vehicle is in “SAND”,
“MUD” or “DEEP SNOW” mode,
VSC is automatica lly turned off.
(VSC OFF indicator light come on.)
ModeRoad Condi- tions
“AUTO”Suitable for the
road conditions
“SAND”
Suitable for
sandy roads
and other slip-
pery conditions
“MUD”
Suitable for
muddy roads
and other slip-
pery conditions
“ROCK”Suitable for
rocky terrain
ModeRoad Condi- tions
“AUTO”Suitable for the
road conditions
“DIRT”
Suitable for
bumpy road
conditions,
such as dirt
roads
“SAND”
Suitable for
sandy roads
and other slip-
pery conditions
“MUD”
Suitable for
muddy roads
and other slip-
pery conditions
“DEEP
SNOW”Suitable for
deep snow
roads
ModeRoad Condi-tions

3704-5. Using the driving support systems
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■Multi-terrain Select
Multi-terrain Sel ect controls the
vehicle so that i t can maximize the
drive force and imp rove drivability
on rough roads. As a result, fuel effi-
ciency may diminish when com-
pared to driving in normal mode.
■Automatic system cancelation
In the following situations, Multi-ter-
rain Select will be canceled auto-
matically.
●When the power switch is turned
off
●When the front-wheel drive control
switch is in “2H”
●When “TOW HAUL” mode and
“TOW+” mode is selected while
the front-wheel drive control
switch is in “4H”
●When drive mode select is
selected while the front-wheel
drive control switch is in “4H”
■Turning off Mult i-terrain Select
Performing the following turns Multi-
terrain Select off, and then the dis-
play on the multi-information display
will disappear.
When the “MTS” switch indicator
is illuminated
Press the “MTS” switch while the
system is in operation.
When the “MTS” switch indicator
is not illuminated
Press the “MTS” switch to turn the
indicator on.
Press the “MTS” switch again with
the Multi-terr ain Select indicator illu-
minated.
■When the vehic le is stuck
Switching the transfer and differen-
tial For the operation of the following
functions, refer to the following
pages. (If equipped)
●Four-wheel drive system
(  P.361)
●Rear differential lock ( P.364)
■Driving in Multi-terrain Select
The following types of situations
may occur, but they are not malfunc-
tions.
●Vibrations may be felt throughout
the vehicle or steering wheel.
●Operating noise may be heard
from the hybrid system compart-
ment.
■When an inspection at your
Toyota dealer is necessary
In the following situ ations, the sys-
tem may be malf unctioning. Have
the vehicle inspected by your Toyota
dealer immediately.
●When the slip indica tor light illumi-
nates.
●When the indicator for each mode
does not illuminate on the multi-
information display even though
Multi-terrain Select is selected.

3714-5. Using the driving support systems
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Driving
*: If equipped
“DAC/CRAWL” switch
Mode select switch Multi-information display
Press the “DAC/CRAWL”
switch.
The downhill assist control system
indicator will comes on and the sys-
tem will operate.
When the system is in operation,
the slip indicator will flash, and the
stop lights/high mounted stop lights
will be lit. A sound may also occur
during the operation. This does not
indicate a malfunction.
Turn the mode select switch to
set the desired speed (approx. 3
mph [4 km/h] to 18 mph [30
km/h]). The set speed is dis-
played on the multi-information
display.
Downhill assist con-
trol system*
The downhill assist control
system helps to prevent
excessive speed on steep
downhill slopes. The sys-
tem will operate when the
vehicle is traveling under 18
mph (30 km/h) and transfer
mode is in “4H”.
WARNING
■When using downhill assist
control system
Do not rely overmuch on the
downhill assist control system.
This function does not extend the
vehicle’s performance limitations.
Always thoroughly check the road
conditions, and drive safely.
System components
System operation
Setting the speed of the
downhill assist control
system

3724-5. Using the driving support systems
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Multi-information display
Decreases the speed
Increases the speed
When the “DAC/CRAWL”
switch indicator illuminates
Press the “DAC/CRAWL” switch
again.
When the “DAC/CRAWL”
switch indicator does not illu-
minate
Press the “DAC/CRAWL” switch
to turn the indicator on.
Press the “DAC/CRAWL” switch
again with the indicator turned
on.
The downhill assist control system
indicator will flash as the system
gradually ceases operation, and will
turn off when the system is fully off.
Press the “DAC/CRAWL” switch
while the downhill assist control
system indicator is flashing to start the system again.
■Operating tips
●Downhill assist con
trol system can
be used with “TOW HAUL” mode
and “TOW+” mode, drive mode
select, or Multi-terrain Select ON
or OFF.
●The system will op erate when the
shift lever is in a position other
than P, however to make effective
use of the system it is recom-
mended to select a lower shift
range.
■If the downhill a ssist control
system indicator flashes
●In the following situ ations, the indi-
cator flashes and the system will
not operate:
• The front-wheel drive control switch is changed to a position
other than “4H”.
• The shift lever is in P.
• The vehicle speed exceeds approximately 18 mph (30 km/h).
• The brake system overheats.
●In the following situ ations, the indi-
cator flashes to alert the driver,
but the system will operate:
• The shift lever is in N.
• The “DAC/CRAWL” switch is pressed while the “DAC/CRAWL”
switch indicator illuminates.
The system will gradually ceases
operation. The indicator will flash
during operation, and then go off
when the system is fully off.
■When the downhill assist con-
trol system is operated continu-
ously
If the downhill assist control system
is operated for a long period of time,
the brake system may abnormally
overheat. To preve nt that, a buzzer
will sound and the function is tempo-
rarily stopped. In this case, the
downhill assist control system indi-
cator will flash. (Th e vehicle an be
driven normally during this time)
When the downhill assist control
Turning off the system

3734-5. Using the driving support systems
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Driving
system indicator switches to steadily
illuminated after a short while and
the system will become available.
■Sounds and vibrations caused
by the downhill assist control
system
●A sound may be heard from the
hybrid system compartment 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
downhill assist control system.
●Either of the following conditions
may occur when the downhill
assist control system is operating.
None of these are indicators that a
malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
■System malfunction
In the following ca ses, have your
vehicle checked by your Toyota
dealer.
●The downhill assist control system
indicator does not come on when
the “DAC/CRAWL” switch is
pressed.
●The slip indicator light comes on.
■ECB (Electronically Con-
trolled Brake System)
The electronically controlled
system generates braking force
corresponding to the brake
operation
■ABS (Anti-lock Brake Sys-
tem)
Helps to prevent wheel lock
when the brakes are applied
suddenly, or if the brakes are
applied while driving on a slip-
pery road surface, or in off-road
conditions (such as rough
roads, sand and mud)
The ABS operates in synchroni-
zation with the Multi-terrain
Select
■Brake assist
Generates an increased level of
braking force after the brake
pedal is depressed when the
WARNING
■The system may not operate
on the following surfaces,
which may lead to an acci-
dent causing death or serious
injury
●Slippery surfaces such as wet
or muddy roads
●Icy surface
●Very bumpy and rough roads
Driving assist systems
To keep driving safety and
performance, the following
systems operate automati-
cally in response to various
driving situations. Be
aware, however, that these
systems are supplementary
and should not be relied
upon too heavily when oper-
ating the vehicle.
Summary of the driving
assist systems

3744-5. Using the driving support systems
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system detects a panic stop sit-
uation
■Enhanced VSC (Enhanced
Vehicle Stability Control)
Provides cooperative control of
the ABS, TRAC, VSC and EPS.
Helps to maintai n directional
stability when swerving on slip-
pery road surfaces by con-
trolling steering performance.
■Trailer Sway Control
Helps the driver to control trailer
sway by selectively applying
brake pressure for individual
wheels and reducing driving
torque when trailer sway is
detected.
■TRAC (Traction Control)
Helps to maintain drive power
and prevent the drive wheels
from spinning when starting the
vehicle or accelerating on slip-
pery roads
■Hill-start assist control
Helps to reduce the backward
movement of the vehicle when
starting on an uphill
■AVS (Adaptive Variable
Suspension System) (if
equipped)
The damping force of the shock
absorbers are independently
controlled for the 4 wheels
according to factors including
the road surface conditions and
driving operation, contributing
toward enhancing smooth driv- ing comfort and superior stabil-
ity, and helping to maintain
vehicle posture.
In addition, the damping force
can be changed by selecting the
drive mode with the driving
mode select (
P.358), and driv-
ing comfort can be ensured
during off-road driving by setting
the front-wheel drive control
switch to “4L”.( P.361)
■EPS (Electric Power Steer-
ing)
Employs an electric motor to
reduce the amount of effort
needed to turn the steering
wheel
■The Secondary Collision
Brake
When the SRS airbag sensor
detects a collision and the sys-
tem operates, the brakes and
brake lights are automatically
controlled to reduce the vehicle
speed and help reduce the pos-
sibility of further damage due to
a secondary collision.
■When the
TRAC/VSC/ABS/Trailer Sway
Control systems are operating
The slip indicator light will flash
while the TRAC/VSC/ABS/Trailer
Sway Control systems are operat-
ing.

3754-5. Using the driving support systems
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Driving
■Disabling the TRAC system
If the vehicle gets stuck in mud, dirt
or snow, the TRAC system may
reduce power from the hybrid sys-
tem to the wheels. Pressing to
turn the system off may make it eas-
ier for you to rock the vehicle in
order to free it.
To turn the TRAC system off, quickly
press and release .
“Traction Control Turned OFF” is
displayed in the multi-information
display.
Press again to t urn the system
back on.
■Turning off the
TRAC/VSC/Trailer Sway Con-
trol systems
To turn the TRAC, VSC and Trailer
Sway Control systems off, press
and hold for more than 3 sec-
onds while the vehicle is stopped.
The “Traction Control Turned OFF” is displayed in the
multi-information
display and the VSC OFF indicator
light will come on.
*
Press again to turn the system
back on.
*: PCS will also be disabled (only
Pre-Collision warning is avail-
able). The PCS warning light will
come on and a message will be
displayed on the multi-information
display. ( P.241, 503)
■When the message is dis-
played on the multi-information
display showing that TRAC has
been disabled even if has
not been pressed
●TRAC is temporary deactivated. If
the information continues to show,
contact your Toyota dealer.
●When using Multi-terrain Select,
the “VSC OFF” indicator will turn
on depending on the mode, even
if the VSC OFF switch has not
been pressed.
■Operating conditions of hill-
start assist control
When the following five conditions
are met, the hill-star t assist control
will operate:
●The shift lever is in a position
other than P or N (when stating off
forward/backward on an upward
incline)
●The vehicle is stopped
●The accelerator pedal is not
depressed
●The parking brake is not engaged
●The power switch is turned to ON
■Automatic system cancelation
of hill-start assist control
The hill-start assist control will turn
off in any of the fo llowing situations:
●The shift lever is shifted to P or N

3764-5. Using the driving support systems
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●The accelerator pedal is
depressed
●The parking brake is engaged
●A maximum of 2 seconds have
elapsed after the brake pedal is
released
●The power switch is turned to OFF
■Sounds and vibrations caused
by the ABS, brake assist, VSC,
Trailer Sway Control, TRAC and
hill-start assist control systems
●A sound may be heard from the
hybrid system compartment when
the brake pedal is depressed
repeatedly, when the hybrid sys-
tem is started or just after the vehi-
cle begins to move. This sound
does not indicate that a malfunc-
tion has occurred in any of these
systems.
●Any of the following conditions
may occur when t he 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’ door is
opened.
●Operating sound heard from the
engine compartment when one or
two minutes passed after the stop
of the hybrid system.
■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 a utomatically 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.
■Reduced effectiveness of the
EPS system
The effectiveness of the EPS sys-
tem is reduced to prevent the sys-
tem from overheating when there is
frequent steering input over an
extended period o f time. The steer-
ing wheel may f eel 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 cancelation
The system is automatically can-
celed in any of th e following situa-
tions.
●The vehicle speed drops to
approximately 0 mph (0 km/h).
●A certain amount of time elapses
during operation