brake TOYOTA TUNDRA 2023 Workshop Manual

3044-5. Using the driving support systems
■Shifting from “2WD” to “4H”
Reduce vehicle speed to less than 62 mph (100 km/h).
Turn the front-wheel drive control switch to “4H”.
The four-wheel drive indicator will come on.
■
Shifting from “4H” to “2WD”
Turn the front-wheel drive co ntrol switch to “2WD”.
This can be done at any speed. Y ou need not depress the clutch
pedal. (manual transmission only)
The four-wheel drive indicator will go off.
■
Shifting from “4H” to “4L”
Automatic transmission
Stop the vehicle completely and continue to depress the brake
pedal.
Shift the shift lever to N.
Push and turn the front-wheel drive control switch to “4L”.
The “4LO” indicator will come on.
If the four-wheel drive indicator flashes and the buzzer sounds, try the
above steps again.
Manual transmission
Stop the vehicle or reduce your speed to less than 2 mph (3 km/ h).
Depress and hold the clutch pedal.
Push and turn the front-wheel drive control switch to “4L”.
The “4LO” indicator will come on.
If the four-wheel drive indicator flashes and the buzzer sounds, try the
above steps again.
Shifting between “2WD” and “4H”
Shifting between “4H” and “4L”
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3054-5. Using the driving support systems
4
Driving
■Shifting from “4L” to “4H”
Automatic transmission
Stop the vehicle completely and continue to depress the brake
pedal.
Shift the shift lever to N.
Push and turn the front-wheel drive control switch to “4H”.
The “4LO” indicator will go off.
If the four-wheel drive indicator flashes and the buzzer sounds, try the
above steps again.
Manual transmission
Stop the vehicle or reduce your speed to less than 2 mph (3 km/ h).
Depress and hold the clutch pedal.
Push and turn the front-wheel dr ive control switch to “4H”.
The “4LO” indicator will go off.
If the four-wheel drive indicator flashes and the buzzer sounds, try the
above steps again.
■If the four-wheel dri ve indicator light or the “4LO” indicator light blinks
● Shifting from “2WD” to “4H”
• If the four-wheel drive indicator continues to blink, drive straight ahead
while accelerating or decelerating.
• If the four-wheel drive indicator continues to blink and the b uzzer sounds,
stop the vehicle or reduce the vehicle speed to less than 62 mp h
(100 km/h). Operate the switch again.
● Shifting from “4H” to “2WD”
If the four-wheel drive indicator continues to blink, drive str aight ahead
while accelerating or decelerating, or drive forward or backwar d in a short
distance.
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3084-5. Using the driving support systems
■If the engine is turned off and restarted
The AUTO LSD system and the indicators are automatically turned off.
■ Reactivation of the VSC system linked to vehicle speed
When the AUTO LSD system is turned on, the VSC and TRAC systems will
turn on automatically if vehicle speed increases.
■ If the brake system overheats
The system will cease operation and a buzzer will sound to alert the driver.
Stop the vehicle in a safe place. (There is no problem with con tinuing normal
driving.) The system will be automatically restored after a sho rt time.
WARNING
■ To avoid an accident
● Do not use the AUTO LSD system in conditions other than the abo ve.
A much greater steering effort and more careful cornering control will be
required.
● Do not drive with the AUTO LSD system continuously turned on.

3104-5. Using the driving support systems
Manual transmission
Before using the rear differential lock 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 to see if this is sufficient. If th is has no
effect, additionally use the re ar differential lock system.
Be sure to stop the wheels.
Depress the clutch pedal.
Press the rear differential lock switch.
After the rear differential is locked, the indicator will come on.
Slowly release th e clutch pedal.
Unlock the rear differential as soon as the vehicle moves.
To unlock the rear different ial, press the switch again.
■Locking the rear differential
●When the rear differential is locked, VSC is automatically turn ed off.
(The rear differential lock and VSC off indicators come on.)
● The following systems do not operate when the rear differential is locked. It
is normal operation for the ABS warning light and VSC off indic ator to be on
at this time.
•ABS
• Multi Terrain ABS (if equipped)
• Brake assist system
•VSC
•TRAC
• Pre-Collision System (if equipped)
• Dynamic radar cruise control system (if equipped)
• Cruise control system (if equipped)
• Hill-start assist control (if equipped on 4WD models)
■ The rear differential lock is disengaged when
●Vehicles without a smart key system: When the engine switch is turned to
the “LOCK” position
● Vehicles with a smart key system: When the engine switch is tur ned off
● 4WD models only: Turn the front-wheel drive control switch to “ 2WD” or “4H”
position.
Never forget to turn off the switch after using this feature.
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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
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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
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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)

3234-5. Using the driving support systems
4
Driving
Driving assist systems
◆ABS (Anti-lock Brake System)
Helps to prevent wheel lock when the brakes are applied suddenl y,
or if the brakes are applied while driving on a slippery road surface
◆Multi Terrain ABS (Anti-lock Brake System) (if equipped)
Helps to prevent wheel lock when the brakes are applied suddenl y,
or if the brakes are applied while driving on a slippery road s urface,
or in off-road conditions (such as rough roads, sand and mud)
◆Brake assist
Generates an increased level of braking force after the brake p edal
is depressed when the system de tects a panic stop situation
◆VSC (Vehicle Stability)
Helps the driver to control skidding when swerving suddenly or
turning on slippery road surfaces
◆Trailer Sway Control (if equipped)
Helps the driver to control trailer sway by selectively applying brake
pressure for individual wheels and reducing engine torque when
trailer sway is detected.
Trailer Sway Control is part of the VSC system and will not ope rate if
VSC system is turned off or experiences a malfunction.
◆TRAC (Traction Control)
Helps to maintain drive power and prevent the drive wheels from
spinning when starting the vehicl e or accelerating on slippery roads
To help enhance driving safety and performance, the following
systems operate autom atically in response to various driving
situations. Be aware, however, that these systems are supple-
mentary and should not be relied upon too heavily when operat-
ing the vehicle.

3264-5. Using the driving support systems
■Sounds and vibrations caused by th e ABS, Multi Terrain ABS, brake
assist, VSC, TRAC and Trailer Sway Control systems
● A sound may be heard from the engine compartment when the brake pedal
is depressed repeatedly, when the engine is started or just aft er the vehicle
begins to move. This sound does not indicate that a malfunction has
occurred in any of these systems.
● Any of the following conditions may occur when the above system s are
operating. None of these indicates that a malfunction has occur red.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after the ABS is activate d.
• The brake pedal may move down slightly after the ABS is activa ted.
■ Automatic reactivation of TRAC, VSC and Trailer Sway Control sy stems
after turning off the engine
Turning off the engine after turning off the TRAC, VSC and Trailer Sway Con-
trol systems will automatically reactivate them.
■ Automatic reactivation of TRAC system (AUTO LSD mode)
With AUTO LSD mode, VSC off and “A UTO LSD” indicator lights turn on.
The VSC and TRAC systems will turn on when the vehicle speed in creases.
■ Automatic reactivation of TRAC, V SC and Trailer Sway Control systems
If the TRAC, VSC and Trailer Sway Control systems are turned off, automatic
reactivation will not occur when vehicle speed increases
■ If the brake system overheats
TRAC will cease operation and a buzzer will sound to alert the driver. Stop
the vehicle in a safe place. (There is no problem with continuing normal driv-
ing.)
■ When the VSC or TRAC system is turned off by pressing the VSC o ff
switch
On vehicles with pre-collision system, pre-collision brake assi st and pre-colli-
sion braking will also be disabled. The PCS warning light will come on and
the message will be shown on the multi-information display. (→P . 501)
■ Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assi st control will
operate:
● The shift lever is in a position other than P or N (when starting off forward/
backward on an upward incline).
● The vehicle is stopped.
● The accelerator pedal is not depressed.
● The parking brake is not engaged.