2016 TOYOTA TUNDRA Owners Manual

2334-5. 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 suddenly,
or if the brakes are applied while driving on a slippery road surface
◆Brake assist
Generates an increased level of braking force after the brake pedal
is depressed when the system detects a panic stop situation
◆VSC (Vehicle Stability Control)
Helps the driver to control skidding when swerving suddenly or
turning on slippery road surfaces
◆Trailer Sway Control
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 operate if
VSC system is turned off or experiences a malfunction.
◆TRAC (Traction Control) for 2WD models and 2WD mode on
4WD models
Helps to maintain drive power and prevent the drive wheels from
spinning when starting the vehicle or accelerating on slippery roads
◆A-TRAC (Active Traction Control) for 4WD mode on 4WD mod-
els
Maintains drive power and prevents all wheels from spinning when
starting the vehicle or accelerating on slippery roads.
To help enhance driving safety and performance, the following
systems operate automatically 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.

2344-5. Using the driving support systems
The slip indicator light will flash
while the TRAC/VSC/A-TRAC/
Trailer Sway Control systems are
operating.
If the vehicle gets stuck in fresh snow or mud, VSC/Trailer Sway Con-
trol/TRAC systems may reduce power from the engine to the wheels.
You may need to turn the system off to enable you to rock the vehicle
in order to free it.
■TRAC off mode
Press the VSC off switch.
The “AUTO LSD” indicator will
come on.
The system is in TRAC off and
AUTO LSD, VSC, Trailer Sway
Control on mode.
Press the switch again to turn
the system back on.
When the TRAC/VSC/A-TRAC/Trailer Sway Control systems are
operating
Disabling the VSC/Trailer Sw ay Control/TRAC systems (2WD
models and 2WD mode on 4WD models)

2354-5. Using the driving support systems
4
Driving
■AUTO LSD mode
Stop the vehicle completely,
and press the VSC off switch
for more than 3 seconds, when
the system is in the TRAC OFF
mode.
The VSC off and “AUTO LSD”
indicators will come on.
The system is in TRAC, VSC,
Trailer Sway Control off and
AUTO LSD on mode.
■
VSC off mode
Stop the vehicle completely,
and press the VSC off switch
for more than 3 seconds, when
the system is in the AUTO LSD
mode.
The VSC off indicator will come
on and the “TRACTION CON-
TROL OFF” will be shown on
the display.
The system is all off mode.

2364-5. Using the driving support systems
If the vehicle gets stuck in fresh snow or mud, VSC/Trailer Sway Con-
trol/A-TRAC systems may reduce power from the engine to the
wheels. You may need to turn the system off to enable you to rock the
vehicle in order to free it.
■A-TRAC off mode
Press the VSC off switch.
The “TRACTION CONTROL
OFF” will be shown on the dis-
play.
The system is in A-TRAC off
and VSC, Trailer Sway Control
on mode.
Press the switch again to turn
the system back on.
■
VSC off mode
Stop the vehicle completely,
and press the VSC off switch
for more than 3 seconds.
The VSC off indicator will come
on and the “TRACTION CON-
TROL OFF” will be shown on
the display.
The system is all off mode.
Press the switch again to turn
the system back on.
Disabling the VSC/Trailer Sway Control/A-TRAC systems (4H
mode on 4WD models)

2374-5. Using the driving support systems
4
Driving
If the vehicle gets stuck in fresh snow or mud, A-TRAC system may
reduce power from the engine to the wheels. You may need to turn
the system off to enable you to rock the vehicle in order to free it.Stop the vehicle completely,
and press the VSC off switch
for more than 3 seconds.
The “TRACTION CONTROL
OFF” will be shown on the dis-
play.
Press the switch again to turn
the system back on.
■When the “TRAC OFF” indicator light comes on or the message is dis-
played on the multi-information disp lay showing that “TRACTION CON-
TROL OFF” has been disabled even if the VSC off switch has not been
pressed
TRAC cannot be operated. Contact your Toyota dealer.
■ Sounds and vibrations caused by the ABS, brake assist, VSC, TRAC, A-
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 after 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 systems 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 after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after the ABS is activated.
• The brake pedal may move down slightly after the ABS is activated.
■ Reactivation of the TRAC/VSC/A-T RAC/Trailer Sway Control systems
Even after the TRAC/VSC/A-TRAC/Trailer Sway Control systems have been
turned off, turning the engine switch off and then on again will automatically
reactivate the TRAC/VSC/A-TRAC/Trailer Sway Control systems.
■ Reactivation of the TRAC system linked to vehicle speed
When only the TRAC system is turned off, the TRAC system will turn on
when vehicle speed increases. However, when both TRAC/VSC systems are
turned off, the systems will not turn on even when vehicle speed increases.
Disabling the A-TRAC system (4L mode on 4WD models)

2384-5. Using the driving support systems
■If the brake system overheats
TRAC or A-TRAC will cease operation, and the slip indicator will change from
flashing to being on continuously to alert the driver. Stop the vehicle in a safe
place. (There is no problem with continuing normal driving.)
■ Shifting to “4L”
VSC and Trailer Sway Control are automatically turned off.
CAUTION
■The ABS does not operate effectively when
● The limits of tire gripping performance have been exceeded (such as
excessively worn tires on a snow covered road).
● The vehicle hydroplanes while driving at high speed on wet or slick roads.
■ Stopping distance when the ABS is operating may exceed that of nor-
mal conditions
The ABS is not designed to shorten the vehicle’s stopping distance. Always
maintain a safe distance from the vehicle in front of you, especially in the
following situations:
● When driving on dirt, gravel or snow-covered roads
● When driving with tire chains
● When driving over bumps in the road
● When driving over roads with potholes or uneven surfaces
■ TRAC or A-TRAC may not operate effectively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRAC or A-TRAC system is operating.
Drive the vehicle carefully in conditions where stability and power may be
lost.
■ When the VSC and Trailer Sway Control are activated
The slip indicator light flashes. Always drive carefully. Reckless driving may
cause an accident. Exercise particular care when the indicator light flashes.
■ When the TRAC/VSC/A-TRAC/Trailer Sway Control systems are turned
off
Be especially careful and drive at a speed appropriate to the road condi-
tions. As these are the systems to help ensure vehicle stability and driving
force, do not turn the TRAC/VSC/A-TRAC/Trailer Sway Control systems off
unless necessary.

2394-5. Using the driving support systems
4
Driving
CAUTION
■Replacing tires
Make sure that all tires are of the specified size, brand, tread pattern and
total load capacity. In addition, make sure that the tires are inflated to the
recommended tire inflation pressure level.
The ABS, TRAC, A-TRAC, VSC and Trailer Sway Control systems will not
function correctly if different tires are installed on the vehicle.
Contact your Toyota dealer for further information when replacing tires or
wheels.
■ Handling of tires and the suspension
Using tires with any kind of problem or modifying the suspension will affect
the driving assist systems, and may cause a system to malfunction.
■ Trailer Sway Control precaution
The Trailer Sway Control system is not able to reduce trailer sway in all situ-
ations. Depending on many factors such as the conditions of the vehicle,
trailer, road surface, and driving environment, the Trailer Sway Control sys-
tem may not be effective. Refer to your trailer owner’s manual for informa-
tion on how to tow your trailer properly.
■ If trailer sway occurs
Observe the following precautions.
Failure to do so may cause death or serious injury.
● Firmly grip the steering wheel. Steer straight ahead.
Do not try to control trailer swaying by turning the steering wheel.
● Begin releasing the accelerator pedal immediately but very gradually to
reduce speed.
Do not increase speed. Do not apply vehicle brakes.
If you make no extreme correction with the steering or brakes, your vehicle
and trailer should stabilize. (P. 178)

2404-5. Using the driving support systems
Trailer brake controller
The trailer brakes can be controlled by the Trailer brake controller via
the 7-pin connector. By selecting th e type of brakes that are being
used on the trailer (electric or electric-over-hydraulic) and setting the
gain for the controller, the manual TRAILER BRAKE OUTPUT slider
is used to slow just the trailer. The vehicle brake pedal will also slow
down as well as stop the trailer when applied, also via the same con-
nector. Gain values, manual brake outputs, trailer brake types, and
the trailer connection stat us are displayed in the multi-information dis-
play.
Trailer connection indicator
When the trailer has been connected, the indicator comes on
green.
GAIN (+/-) selection button
Pressing the GAIN (+/-) buttons will adjust the amount of power
that can be outputted to the trailer brakes. The gain can be
adjusted from 0 (no trailer braki ng) to 10 (maximum output) in 0.5
increments. Press and holding the buttons will increase or
decrease the gain setting continuously. The gain value will
appear in the multi-information display.
: If equipped
Summary of functions
TYPE
GAIN
1
2