Toyota Tundra (2019 year). Instruction - part 20

WARNING

■

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/VSC may not operate effectively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRAC/VSC system is operating.
Drive the vehicle carefully in conditions where stability and power may be
lost.

■

Hill-start assist control does not operate effectively when

●

Do not overly rely on hill-start assist control. Hill-start assist control may
not operate effectively on steep inclines and roads covered with ice.

●

Unlike the parking brake, hill-start assist control is not intended to hold the
vehicle stationary for an extended period of time. Do not attempt to use
hill-start assist control to hold the vehicle on an incline, as doing so may
lead to an accident.

306

WARNING

■

When the TRAC/VSC/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/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/Trailer Sway Control systems off unless
necessary.
Trailer Sway Control is part of the VSC system and will not operate if VSC is
turned off or experiences a malfunction.

■

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, 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. 190)

307

Trailer brake controller



The trailer brakes can be controlled by the Trailer brake controller via
the 7-pin connector. By selecting the 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 status 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 braking) to 10 (maximum output) in 0.5
increments.  Each  press  of  the  button  will  increase  or  decrease
the  gain  setting  by  one  step. The  gain  value  will  appear  in  the
multi-information display.



: If equipped

Summary of functions

308

Trailer brake type

Trailer brake type can be selected by using the multi-information. The
combination meter will show which trailer brake type is selected in the
multi-information display.

Manual TRAILER BRAKE OUTPUT slider

Adjusting this slider position will engage the trailer’s brakes only. If the
manual TRAILER BRAKE OUTPUT slider is used while the vehicle
brake is applied, the greater of the two outputs will be sent to the trailer
brakes.

The trailer brake type can be selected on the multi-information display
as following:

Press “

” or “” of meter control switches and select

Press “

” or “” of meter control switches and select “Vehicle Set-

tings”, and press

Press “

” or “” of meter control switches and select “TBC Trailer

Type”, and press

to select the correct type of trailer brakes that

are equipped on the trailer.

Changing trailer brake type will cause the current gain setting to reset
to zero. Make sure to set the gain as described in the following sec-
tion.

Gain setting on trailer brake controller should be set for a specific tow-
ing condition. Gain setting should be adjusted each time the vehicle
load, trailer load, road conditions, or weather changes. Setting the
gain value to 0 will disable the trailer brake controller output.

Make  sure  the  trailer  brakes  are  in  good  working  condition  and
functioning normally. See trailer dealer if necessary.
Hook up the trailer and make proper electrical connections.
Select  the  correct  type  of  trailer  brakes  that  are  equipped  on  the
trailer by using the multi-information display.
Drive vehicle with trailer attached on a level road surface similar to
towing  condition  and  in  traffic-free  environment.  Driving  speed
should be approximately 20 - 25 mph [35 - 40 km/h].

Changing settings of the trailer brake type

Setting the Gain

309

Using the GAIN (+/-) selection
buttons, set a starting gain of
5.0.

While driving 20 - 25 mph [35 - 40 km/h], fully apply the

manual

TRAILER BRAKE OUTPUT

slider.

Adjust the gain setting, using the GAIN (+/-) selection buttons, to
either increase or decrease to just below the point of trailer wheel
lock-up.
For confirmation, repeat steps

and

until desired gain setting

is reached (just below point of trailer wheel lock-up).

■

When using the trailer brake control system
Please turn off the intuitive parking assist while towing a trailer. If left on,
sonar sensors will detect the trailer being towed.

■

When setting the gain
Wheel lock-up occurs when the trailer wheel squeals or tire smoke occurs.
Trailer wheels may not lock-up while driving heavily loaded trailer. During this
case, adjust the Trailer gain to the highest allowable setting for the towing
condition.

■

When disconnecting and reconnecting battery terminals
The gain setting data will be reset.

310

WARNING

■

Trailer brake type setting
It is the responsibility of the driver to make sure the trailer brakes are func-
tioning normally and adjusted appropriately. Failure to check and maintain
trailer brakes may result in loss of vehicle control, crash, or serious injury.
Trailer brake control system will work with most electric and electric-over-
hydraulic trailer braking systems up to 3 axles (24A output to trailer brakes).
Please be sure to test compatibility with the system at low speeds and in a
safe area. If a warning message appears in the multi-information display
(

P. 563), have the vehicle inspected by your Toyota dealer immediately.

Some electric-over-hydraulic trailer brakes will take some minimum output
to activate. Trailer brake control system will not work with trailer hydraulic
surge brakes.

■

When driving on slippery road surfaces
When stopping with ABS activated, output to the trailer might be reduced in
order to reduce the likelihood of trailer wheels to lock. The trailer is not
equipped with ABS. Drive safely on slippery road surfaces.

311

Winter driving tips

● Use fluids that are appropriate to the prevailing outside tempera-

tures.

• Engine oil
• Engine coolant
• Washer fluid

● Have a service technician inspect the condition of the battery.
● Have the vehicle fitted with four snow tires or purchase a set of tire

chains for the rear tires.

Ensure that all tires are the same size and brand, and that chains match
the size of the tires.

Perform the following according to the driving conditions:
● Do not try to forcibly open a window or move a wiper that is frozen.

Pour warm water over the frozen area to melt the ice. Wipe away
the water immediately to prevent it from freezing.

● To ensure proper operation of the climate control system fan,

remove any snow that has accumulated on the air inlet vents in
front of the windshield.

● Check for and remove any excess ice or snow that may have accu-

mulated on the exterior lights, vehicle’s roof, chassis, around the
tires or on the brakes.

● Remove any snow or mud from the bottom of your shoes before

getting in the vehicle.

Accelerate the vehicle slowly, keep a safe distance between you and
the vehicle ahead, and drive at a reduced speed suitable to road con-
ditions.

Carry out the necessary preparations and inspections before
driving the vehicle in winter. Always drive the vehicle in a man-
ner appropriate to the prevailing weather conditions.

Preparation for winter

Before driving the vehicle

When driving the vehicle

312

● Park the vehicle and move the shift lever to P without setting the

parking brake. The parking brake may freeze up, preventing it from
being released. If the vehicle is parked without setting the parking
brake, make sure to block the wheels.
Failure to do so may be dangerous because it may cause the vehi-
cle to move unexpectedly, possibly leading to an accident.

● If the vehicle is parked without setting the parking brake, confirm

that the shift lever cannot be moved out of P

: The shift lever will be locked if it is attempted to be shifted from P to any

other position without depressing the brake pedal. If the shift lever can be
shifted from P, there may be a problem with the shift lock system. Have the
vehicle inspected by your Toyota dealer immediately.

Observe the following precautions when switching fuels, in order to
maintain starting and driving performance.
● Do not change fuels when the fuel level is 1/4 or less.
● Always add at least 2.6 gal. (10 L) of fuel.
● After filling up with fuel, warm up the engine or drive the vehicle for

at least 5 minutes or 7 miles (11 km).

● Do not accelerate rapidly immediately after refueling.

Use the correct tire chain size when mounting the tire chains.
Chain size is regulated for each tire size.

Side chain
(0.2 in. [5 mm] in diameter)
Cross chain
(0.25 in. [6.3 mm] in diameter)

When parking the vehicle

Refueling (Flex-fuel vehicles)

Selecting tire chains

313

Regulations regarding the use of tire chains vary depending on loca-
tion and type of road. Always check local regulations before installing
chains.

■

Tire chain installation
Observe the following precautions when installing and removing chains:

●

Install and remove tire chains in a safe location.

●

Install tire chains on the rear tires. Do not install tire chains on the front tires.

●

Install tire chains on rear tires as tightly as possible. Retighten chains after
driving 1/4

 1/2 mile (0.5  1.0 km).

●

Install tire chains following the instructions provided with the tire chains.

Regulations on the use of tire chains

WARNING

■

Driving with snow tires
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in a loss of vehicle control and cause death or
serious injury.

●

Use tires of the specified size.

●

Maintain the recommended level of air pressure.

●

Do not drive in excess of 75 mph (120 km/h), regardless of the type of
snow tires being used.

●

Use snow tires on all, not just some wheels.

●

4WD models: Do not mix tires of different makes, models, tread patterns
or treadwear.

■

Driving with tire chains
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in the vehicle being unable to be driven safely,
and may cause death or serious injury.

●

Do not drive in excess of the speed limit specified for the tire chains being
used, or 30 mph (50 km/h), whichever is lower.

●

Avoid driving on bumpy road surfaces or over potholes.

●

Avoid sudden acceleration, abrupt steering, sudden braking and shifting
operations that cause sudden engine braking.

●

Slow down sufficiently before entering a curve to ensure that vehicle con-
trol is maintained.

314

NOTICE

■

Repairing or replacing snow tires
Request repairs or replacement of snow tires from Toyota dealers or legiti-
mate tire retailers.
This is because the removal and attachment of snow tires affects the opera-
tion of the tire pressure warning valves and transmitters.

■

Fitting tire chains
The tire pressure warning valves and transmitters may not function correctly
when tire chains are fitted.

315

Off-road precautions

● Specific design characteristics give it a higher center of gravity than

ordinary passenger cars. This vehicle design feature causes this
type of vehicle to be more likely to rollover. And, utility vehicles
have a significantly higher rollover rate than other types of vehicles.

● An advantage of the higher ground clearance is a better view of the

road allowing you to anticipate problems.

● It is not designed for cornering at the same speeds as ordinary pas-

senger cars any more than low-slung sports cars are designed to
perform satisfactorily under off-road conditions. Therefore, sharp
turns at excessive speeds may cause the vehicle to rollover.

This vehicle belongs to the utility vehicle class, which has
higher ground clearance and narrower tread in relation to the
height of its center of gravity to make it capable of performing in
a wide variety of off-road applications.

Off-road vehicle features

316

When driving your vehicle off-road, please observe the following pre-
cautions to ensure your driving enjoyment and to help prevent the clo-
sure of areas to off-road vehicles.
● Drive your vehicle only in areas where off-road vehicles are permit-

ted to travel.

● Respect private property. Get owner’s permission before entering

private property.

● Do not enter areas that are closed. Honor gates, barriers and signs

that restrict travel.

● Stay on established roads. When conditions are wet, driving tech-

niques should be changed or travel delayed to prevent damage to
roads.

WARNING

■

Off-road vehicle precautions
Always observe the following precautions to minimize the risk of death, seri-
ous injury or damage to your vehicle:

●

In a rollover crash, an unbelted person is significantly more likely to die
than a person wearing a seat belt. Therefore, the driver and all passengers
should always fasten their seat belts.

●

Avoid sharp turns or abrupt maneuvers, if at all possible.
Failure to operate this vehicle correctly may result in loss of control or
vehicle rollover causing death or serious injury.

●

Avoid loading any items on the roof that will raise the vehicle’s center of
gravity.

●

Always slow down in gusty crosswinds. Because of its profile and higher
center of gravity, your vehicle is more sensitive to side winds than an ordi-
nary passenger car. Slowing down will allow you to have better control.

●

When driving off-road or in rugged terrain, do not drive at excessive
speeds, jump, make sharp turns, strike objects, etc. This may cause loss
of control or vehicle rollover causing death or serious injury. You are also
risking expensive damage to your vehicle’s suspension and chassis.

●

Do not drive horizontally across steep slopes. Driving straight up or
straight down is preferred. Your vehicle (or any similar off-road vehicle)
can tip over sideways much more easily than forward or backward.

Off-road driving

317

■

Additional information for off-road driving



For owners in U.S. mainland, Hawaii and Puerto Rico:

To obtain additional information pertaining to driving your vehicle off-road,
consult the following organizations.

●

State and Local Parks and Recreation Departments

●

State Motor Vehicle Bureau

●

Recreational Vehicle Clubs

●

U.S. Forest Service and Bureau of Land Management

WARNING

■

Off-road driving precautions
Always observe the following precautions to minimize the risk of death, seri-
ous injury or damage to your vehicle:

●

Drive carefully when off the road. Do not take unnecessary risks by driving
in dangerous places.

●

Do not grip the steering wheel spokes when driving off-road. A bad bump
could jerk the wheel and injure your hands. Keep both hands and espe-
cially your thumbs on the outside of the rim.

●

Always check your brakes for effectiveness immediately after driving in
sand, mud, water or snow.

●

After driving through tall grass, mud, rock, sand, rivers, etc., check that
there is no grass, bush, paper, rags, stone, sand, etc., adhering or trapped
on the underbody. Clear off any such matter from the underbody. If the
vehicle is used with these materials trapped or adhering to the underbody,
a breakdown or fire could occur.

●

In a rollover crash, an unbelted person is significantly more likely to die
than a person wearing a seat belt. Therefore, the driver and all passengers
should fasten their seat belts whenever the vehicle is moving.

●

318