TOYOTA TUNDRA 2023 Owners Manual

3114-5. Using the driving support systems
4
Driving
■After unlocking the rear differential
Vehicles without a smart key system
To check that the indicator goes off, turn the engine switch to the “ON” posi-
tion, but do not start the engine.
Vehicles with a smart key system
To check that the indicator goes off, turn the engine switch to IGNITION ON
mode, but do not start the engine.
WARNING
■ To avoid an accident
● Do not use the rear differential lock system except when wheel spinning
occurs in a ditch or on a slippery or ragged surface. Large steering effort
and careful cornering control will be required.
● Do not lock the rear differential until the wheels have stopped spinning.
Otherwise, the vehicle may move in an unexpected direction when the dif-
ferential lock is engaged, resulting in an accident. This may also lead to
possible damage to differential lock component parts.
● Do not drive over 5 mph (8 km/h) when the differential is locke d.
● Do not keep driving with the rear differential lock switch on.

3124-5. Using the driving support systems
Active traction control system
Stop the vehicle or reduce your speed to less than 2 mph (3 km/h ).
Depress the clutch pedal and turn the front-wheel drive control
switch in the “4L” position.
Press the “A-TRAC” switch to
activate the system.
At this time, the “A-TRAC” indicator
will come on.
To cancel the system, press the
switch again.
If four wheels spin, the slip indica-
tor flashes to indicate that the
active traction control system has
been engaged.
: If equipped
The active traction control syst em automatically helps prevent
the spinning of 4 wheels when the vehicle is started or acceler -
ated on slippery road surfaces.
System operation
1
2
When the active traction co ntrol system is operating

3134-5. Using the driving support systems
4
Driving
■When the rear differential is locked (vehicles with the rear di fferential
lock system)
The active traction control system is activated only when the v ehicle speed is
less than 3 mph (6 km/h).
■ Sounds and vibrations caused by the active traction control sys tem
● A sound may be heard from the engine compartment when the engine is
started or just after the vehicle begins to move. This sound do es not indicate
that a malfunction has occurred in the system.
● Vibrations may be felt through the vehicle body and steering. It may occur
when the system is operating.
■ If the brake system overheats
The system will cease operation, a buzzer will sound to alert the driver. Stop
the vehicle in a safe place. (There is no problem with continuing normal driv-
ing.)
The system will be automatically restored after a short time.
WARNING
■ The active traction control system may not operate effectively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the active traction control system is operating.
Do not drive the vehicle in conditions where stability and powe r may be lost.

3144-5. Using the driving support systems
Multi-terrain Select
Select a mode that most closely matches the type of terrain on which
you are driving from among 5 modes.
Brake control can be optimized i n accordance with the selected mode.
Multi-terrain Select on/off switch
Mode selector dial
Multi-terrain Select indicator
Multi-terrain Select indicator comes on when operating.
Mode indicator
Multi-information display
Displays status information including operating status and road type selec-
tion.
: If equipped
Multi-terrain Select is a system that improves driveability in off-
road situations.
Multi-terrain Select switch/indicators
1
2
3
4
5

3154-5. Using the driving support systems
4
Driving
A mode which matches the road
conditions can be selected from
among the following 5 modes.
Selectable modes
PositionSymbolModeRoad conditions
“Mud & Sand” Suitable for muddy roads, sandy
roads, snow-covered roads, dirt
trails and other slippery or dirty con-
ditions
“Loose Rock” Suitable for slippery conditions con-
sisting of mixtures of earth and
loose rock
“Mogul” Suitable for very bumpy road condi-
tions, such as mogul roads
“Rock & Dirt” Suitable for very bumpy road condi-
tions, such as mogul or rocky roads
“Rock” Suitable for rocky terrain
1
2
3
4
5

3164-5. Using the driving support systems
Operate the Multi-terrain Select
mode selector dial during Multi-
terrain Select control to select a
mode.
■The Multi-terrain Select can be operated when
●The four-wheel drive control switch is in “4L” position.
● The Crawl Control is off.
■ When using the Multi-terrain Select
The VSC system cannot be switched on or off.
A message will be shown on the multi-information display statin g that this
function cannot be switched using the VSC off switch.
■ When it is difficult to generate traction
“MUD & SAND” mode provides the largest amount of tire slippage, followed
by “LOOSE ROCK”, “MOGUL”, “ROCK & DIRT” and “ROCK” mode.
If the current tires slip is too large, driveability can be imp roved by selecting a
mode with a smaller slip amount. Conversely, selecting a mode with a larger
slip can improve driveability, if the current tire slip is too small.
■ When the vehicle is stuck
Switching the transfer and differentials
For the operation of following function, refer to the following pages.
● Four-wheel drive system ( P. 303)
● Rear differential lock ( P. 309)
Selecting modes

3174-5. Using the driving support systems
4
Driving
■When the active traction control operates continuously
P. 313
■ When the four-wheel drive control switch is in “4L” position
If the Multi-terrain Select system is not operating and the four-wheel drive
control switch is in “4L”, the “TRAC OFF” indicator will come o n.
■ When there is a malfunction in the system
The slip indicator light will come on. Have the vehicle inspect ed by your
Toyota dealer immediately.
WARNING
■When using Multi-terrain Select
Observe the following precautions to avoid an accident that cou ld result in
death or serious injuries:
● There is a chance that the selected mode may not be the most appropriate
in terms of road conditions such as pitch, slipperiness, undulation, etc.
(P. 315)
● Multi-terrain Select is not intended to expand the limits of the vehicle.
Check the road conditions thoroughly beforehand, and drive safe ly and
carefully.
NOTICE
■ Precaution for use
The Multi-terrain Select is intended for use during off-road driving. Do not
use the system at any other time.

3184-5. Using the driving support systems
Crawl Control
Speed selector dial
Turn the dial clockwise to increase the speed and counterclockw ise to
decrease the speed.
Crawl Control on/off switch
The Crawl Control indicator comes on and the slip indicator flashes when
operating.
Crawl Control indicator
Slip indicator
Multi-information display
The operating status and speed select status of the Crawl Contr ol are
shown on the multi-information display.
: If equipped
Allows travel on extremely rough off-road surfaces at a fixed low
speed without pressing the accel erator or brake pedal. Mini-
mizes loss of traction or vehic le slip when driving on slippery
road surfaces, allowing for stable driving.
Crawl Control switch
1
2
3
4
5

3194-5. Using the driving support systems
4
Driving
The following table shows some
typical terrains and the recom-
mended speed modes.
Press the Crawl Control on/off switch while Crawl Control is operating.
If the switch is turned off, the slip indicator will turn off, the Crawl Con-
trol indicator will flash until the system has turned off compl etely, and
a message stating that Crawl Control has been turned off will b e dis-
played on the multi-informati on display for several seconds.
When turning off Crawl Control while driving, stop the vehicle before
the Crawl Control indi cator turns off, or drive extremely caref ully.
■Crawl Control can be operated when
●The engine is running.
● The shift lever is in any position other than P or N.
● The front-wheel drive control switch is turned to “4L”.
● The driver’s door is closed.
Speed modes
PositionSpeed modeRoad conditions
Low Rock, mogul (downhill) and gravel
(downhill)
Between low and medium Mogul (uphill)
Medium
Snow, mud, gravel (uphill), sand,
dirt, mogul (uphill) and grass
Between medium and high
High
1
2
3
4
5
When the system is turned off

3204-5. Using the driving support systems
■Automatic system cancelation
In the following situations, the buzzer will sound intermittently and Crawl Con-
trol will be canceled automatically. In this event, the Crawl C ontrol indicator
will flash and then goes off, and a message stating that Crawl Control has
been turned off will be displayed on the multi-information disp lay for several
seconds.
● When the shift lever is shifted to P or N
● When the front-wheel drive control switch is turned to “4H”
● When the driver’s door is opened
■ Function limitations
When the vehicle speed exceeds appr oximately 15 mph (25 km), engine con-
trol and brake control will stop temporarily. In this event, th e Crawl Control
indicator will flash.
■ When the Crawl Control system is operated continuously
● If Crawl Control is used continuously for a long time, the buzz er will sound, a
malfunction notification will be displayed on the multi-informa tion display,
the Crawl Control indicator goes off, and Crawl Control will be temporarily
inoperable as a result of the brake system overheating. In this event, stop
the vehicle immediately in a safe place, and allow the brake sy stem to cool
down sufficiently until the “TRAC OFF” indicator will goes off. (In the mean-
time, normal driving is possible.)
● If Crawl Control is used continuously for a long time, the buzz er will sound,
the system will be temporarily canceled, and a malfunction noti fication will
be displayed on the multi-information display as a result of th e automatic
transmission system overheating. Stop the vehicle in a safe pla ce until the
display goes off.
■ Sounds and vibrations caused by the Crawl Control system
● A sound may be heard from the engine compartment when the engin e is
started or just after the vehicle begins to move. This sound do es not indicate
that a malfunction has occurred in Crawl Control system.
● Either of the following conditions may occur when the Crawl Con trol system
is 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 after the vehicle comes to a stop.
■ When there is a malfunction in the system
Warning lights and/or warning messages will turn on. ( P. 489)