2023 TOYOTA TUNDRA HYBRID trailer

3754-5. Using the driving support systems
Owners Manual_USA_M0C052_en
4
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
Owners Manual_USA_M0C052_en
●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

3774-5. Using the driving support systems
Owners Manual_USA_M0C052_en
4
Driving
●The accelerator pedal is
depressed a large amount
WARNING
■The ABS does not operate
effectively when
●The limits of tire gripping perfor-
mance 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 normal conditions
The ABS is not designed to
shorten the vehicle’s stopping dis-
tance. Always maintain a safe dis-
tance from the vehicle in front of
you, especially in the following sit-
uations:
●When driving on d irt, 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
slippery road surfaces, even if the
TRAC/VSC system is operating.
Drive the vehicle carefully in con-
ditions 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 effec-
tively on steep inclines and
roads covered with ice.
●Unlike the parking brake, hill-
start assist control is not
intended to hold the vehicle sta-
tionary 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 acci-
dent.
■When the TRAC/VSC/Trailer
Sway Control is activated
The slip indicator light flashes.
Always drive carefully. Reckless
driving may cause an accident.
Exercise particula r 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
conditions. As these are the sys-
tems to help ensure vehicle stabil-
ity and driving force, do not turn
the TRAC/VSC/Trailer Sway Con-
trol 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.

3784-5. Using the driving support systems
Owners Manual_USA_M0C052_en
WARNING
■Replacing tires
Make sure that all tires are of the
specified size, brand, tread pat-
tern and total load capacity. In
addition, make sure that the tires
are inflated to the recommended
tire inflation pressure level.
The ABS, TRAC, Trailer Sway
Control and VSC systems will not
function correctly if different tires
are installed on the vehicle.
Contact your Toyota dealer for fur-
ther information when replacing
tires or wheels.
■Handling of tires and the sus-
pension
Using tires with any kind of prob-
lem or modifying the suspension
will affect the driving assist sys-
tems, and may cause a system to
malfunction.
■Trailer Sway Control precau-
tion
The Trailer Sway Control system
is not able to reduce trailer sway
in all situations . Depending on
many factors such as the condi-
tions of the vehicle, trailer, road
surface and driving environment,
the Trailer Sway Control system
may not be effec tive. Refer to
your trailer owner’s manual for
information on how to tow your
trailer properly.
■If trailer sway occurs
Observe the following precau-
tions.
Failing to do so may cause death
or serious injury.
●Firmly grip the steering wheel.
Steer straight ahead. Do not try
to control trailer sway 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 traile r should stabi-
lize. ( P.181)
■Secondary Collision Brake
Do not rely solely upon the Sec-
ondary Collision Brake. This sys-
tem is designed to help reduce
the possibility of further damage
due to a secondary collision, how-
ever, that effect changes accord-
ing to various conditions. Overly
relying on the system may result
in death or serious injury.

3794-5. Using the driving support systems
Owners Manual_USA_M0C052_en
4
Driving
*: If equipped
“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 incre-
ments. Each press of the button will
increase or decrease the “gain” set-
ting by one step. T he “gain” value
will appear in the mu lti-information
display.
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 brake slider
Adjusting this slider position will
engage the trailer’s brakes only. If
the manual brake slider is used
while the vehicle brake is applied,
the greater of the two outputs will
be sent to the trailer brakes.
Trailer brake control-
ler*
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 brake 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 connec-
tor. “Gain” values, manual
brake outputs, trailer brake
types, and the trailer con-
nection status are displayed
in the multi-information dis-
play.
WARNING
■When driving on slippery
road surfaces
When stopping with ABS acti-
vated, 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.
System operation

3804-5. Using the driving support systems
Owners Manual_USA_M0C052_en
Select the item desired to be
setup and select as follows on
the multi-information screen
(P.100):
1 Press or on the meter
control switch and then select
.
2 Press or on the meter
control switch, select “Trailer
Settings”, and then press and
hold on the meter control
switch.
3 According to the display,
select the desired setting and
then press .
Changing trailer brake type or
trailer ID 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 towing 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. 1
Make sure the trailer brakes
are in good working condition
and functioning normally. See
trailer dealer if necessary.
2 Hook up the trailer and make
proper electrical connections.
3 Select the correct type of
trailer brakes that are
equipped on the trailer by
using the multi-information
display.
4 Drive vehicle with trailer
attached on a level road sur-
face similar to towing condi-
tion and in traffic-free
environment. Driving speed
should be approximately 20 -
25 mph [35 - 40 km/h].
5 Using the “GAIN” (+/-) selec-
tion buttons, set a starting
“gain” of 5.0.
6 While driving 20 - 25 mph [35
- 40 km/h], fully apply the
manual brake slider.
7 Adjust the “gain” setting,
using the “GAIN” (+/-) selec-
tion buttons, to either
increase or decrease to just
below the point of trailer
wheel lock-up.
Changing settings of the
trailer brake type
Setting the “Gain”

3814-5. Using the driving support systems
Owners Manual_USA_M0C052_en
4
Driving
8 For confirmation, repeat
steps 6 and 7 until desired
“gain” setting is reached (just
below point of trailer wheel
lock-up).
■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 allow-
able setting for the towing condition.
■When disconnecting and recon-
necting 12-volt battery termi-
nals
The “gain” setting data will be reset.
■Trailer Sway Control Function
Helps suppress trailer sway at an
early stage by using the trailer brake
control system to operate the trailer
brakes.
■If the Trailer brake warning light
comes on
Indicates a malfunction in the Trailer
brake control system or Trailer con-
nector circuit.
Have the vehicle inspected by your
Toyota dealer immediately.
WARNING
■Trailer brake type setting
It is the responsibility of the driver
to make sure the trailer brakes
are functioning normally and
adjusted appropriately. Failure to
check and maintain trailer brakes
may result in loss of vehicle con-
trol, crash, or serious injury.
Trailer brake control system will
work with most electric and elec-
tric-overhydraulic trailer braking
systems up to 3 axles (24A output
to trailer brakes). Please be sure
to test compatibility with the sys-
tem at low speeds and in a safe
area. If a warning message
appears in the multi-information
display ( P.511), have the vehi-
cle inspected by your Toyota
dealer immediately. Some elec-
tric-over-hydraulic trailer brakes
will take some minimum output to
activate. Trailer brake control sys-
tem will not work with trailer
hydraulic surge brakes.

3824-5. Using the driving support systems
Owners Manual_USA_M0C052_en
*: If equipped
1Select “Trailer Settings” from
( P.96) on the multi-
information display and add a
trailer according to the dis-
play. 2
Press the switch to turn the
system ON.
3 Continue or reselect the
trailer in the message dis-
played on the multi-informa-
tion display.
When the selected trailer is being
used for the first time, setup (cali-
bration) is nece ssary (→P.384).
Once calibration is completed, it is
retained for future use and the sys-
tem will automatically detect the
trailer.
The driver needs to change the
trailer selection when using a differ-
ent trailer. The system does not
automatically recognize the trailer
from the saved trailers list.
4 Once trailer is detected, shift
the shift lever to R to activate
Guidance mode.
5 Touch the switch at the bot-
tom right on multimedia to
activate Straight Path Assist.
Trailer Backup Guide*
Trailer Backup Guide is a
system to assist when back-
ing up a trailer by providing
either (1) steering control to
assist backing up straight
(Straight Path Assist) or (2)
guidance for manual steer-
ing backup (Guidance
mode).
Trailer Backup Guide uses
the rear camera to detect
the trailer and a trailer hitch
light, which allows the
driver to use the system at
night time.
The system calculates the
trailer angle by image pro-
cessing from the rear cam-
era and calculates trailer
length and hitch length
during the trailer setup (cali-
bration) maneuver.
Procedure