2023 TOYOTA TUNDRA HYBRID ECU

681-3. Emergency assistance
Owners Manual_USA_M0C052_en
1-3.Emergency assistance
*: If equipped
Microphone
“SOS” button
LED light indicators
Speaker
■Certification
 P.610
Subscribers have the following
Safety Connect services avail-
able:
 Automatic Collision Notifica-
tion
*
Helps drivers receive necessary
response from emergency service
providers. ( P. 7 0 )
*: U.S. Patent No. 7,508,298 B2
 Stolen Vehicle Location
Helps drivers in the event of vehicle
theft. ( P. 7 0 )
Emergency Assistance Button
Safety Connect*
Safety Connect is a sub-
scription-based telematics
service that uses Global
Positioning System (GPS)
data and embedded cellular
technology to provide
safety and security fea-
tures to subscribers. Safety
Connect is supported by
Toyota’s designated
response center, which
operates 24 hours per day, 7
days per week.
Safety Connect service is
available by subscription on
select, telematics hardware-
equipped vehicles.
By using the Safety Con-
nect service, you are agree-
ing to be bound by the
Telematics Subscription
Service Agreement and its
Terms and Conditions, as in
effect and amended from
time to time, a current copy
of which is available at Toy-
ota.com. All use of the
Safety Connect service is
subject to such then-appli-
cable Terms and Condi-
tions.
System components
Services

691-3. Emergency assistance
Owners Manual_USA_M0C052_en
1
For safety and security
(“SOS”)
Connects drivers to response-cen-
ter support. ( P. 7 0 )
Enhanced Roadside Assis-
tance
Provides drivers various on-road
assistance. ( P. 7 0 )
After you have signed the
Telematics Subscription Service
Agreement and are enrolled,
you can begin receiving ser-
vices.
A variety of subscription terms is
available for purchase. Contact
your Toyota dealer, call the fol-
lowing or push the “SOS” button
in your vehicle for further sub-
scription details.
 The United States
1-800-331-4331
Canada
1-888-869-6828
Puerto Rico
1-877-855-8377
■Safety Connect Services Infor-
mation
●Phone calls using the vehicles
Bluetooth® technology will not be
possible during Safety Connect.
●Safety Connect is available begin-
ning Fall 2009 on select Toyota
models (in the contiguous United
States only). Contact with the
Safety Connect response center
is dependent upon the telematics
device being in operative condi- tion, cellular connection availabil-
ity, and GPS satellite signal
reception, which can limit the abil-
ity to reach the response center or
receive emergency service sup-
port. Enrollment and Telematics
Subscription Service Agreement
required. A variety of subscription
terms is available; charges vary
by subscription term selected and
location.
●Automatic Collision Notification,
Emergency Assistance and Stolen
Vehicle Location will function in
the United States, including
Hawaii and Alaska
, Puerto Rico
and in Canada, and Enhanced
Roadside Assistance will function
in the United States, Puerto Rico
and in Canada.
●Automatic Collision Notification,
Emergency Assistance, Stolen
Vehicle and Enhanced Road
Assistance will not function in the
United States Virgin Islands.
For vehicles first sold in the USVI,
no Safety Connect services will
function in and outside the United
States Virgin Islands.
●Safety Connect services are not
subject to section 255 of the Tele-
communications Act and the
device is not TTY compatible.
■Languages
The Safety Connect response cen-
ter will offer suppor t in multiple lan-
guages. The Safety Connect system
will offer voice prom pts in English,
Spanish, and French. Please indi-
cate your language of choice when
enrolling.
■When contacting the response
center
You may be unable to contact the
response center if the network is
busy.
Subscription

711-3. Emergency assistance
Owners Manual_USA_M0C052_en
1
For safety and security
necessary assistance required.
If you accidentally press the “SOS”
button, tell the response-center
agent that you are not experiencing
an emergency.
■Enhanced Roadside Assis-
tance
Enhanced Roadside Assistance
adds GPS data to the already
included warranty-based Toyota
roadside service.
Subscribers can press the
“SOS” button to reach a Safety
Connect response-center agent,
who can help with a wide range
of needs, such as: towing, flat
tire, fuel delivery, etc. For a
description of the Roadside
Assistance services and their
limitations, please see the
Safety Connect Terms and Con-
ditions, which are available at
Toyota.com.
Important! Read this informa-
tion about exposure to radio fre-
quency signals before using
Safety Connect;
The Safety Connect system
installed in your vehicle is a low-
power radio transmitter and
receiver. It receives and also
sends out radio frequency (RF)
signals.
In August 1996, the Federal
Communications Commission (FCC) adopted RF exposure
guidelines with safety levels for
mobile wireless phones. Those
guidelines are consistent with
the safety standards previously
set by the following U.S. and
international standards bodies.

ANSI (American National
Standards Institute) C95.1
[1992]
 NCRP (National Council on
Radiation Protection and
Measurement) Report 86
[1986]
 ICNIRP (International Com-
mission on Non-Ionizing Radi-
ation Protection) [1996]
Those standards were based on
comprehensive and periodic
evaluations of the relevant sci-
entific literature. Over 120 scien-
tists, engineers, and physicians
from universities, and govern-
ment health agencies and
industries reviewed the avail-
able body of research to
develop the ANSI Standard
(C95.1).
The design of Safety Connect
complies with the FCC guide-
lines in addition to those stan-
dards.
■Free /Open Source Software
Information
This product contains Free/Open
Source Software (FOSS). The
License information and/or the
source code of such FOSS can be
found at the following
Safety information for
Safety Connect

731-4. Hybrid system
Owners Manual_USA_M0C052_en
1
For safety and security
1-4.Hybrid system
■System components
The illustration is an example fo r explanation and may differ from the actual
item.
Gasoline engine
Electric motor (traction motor)
■When stopped/during start
off
The gasoline engine stops
* when the vehicle is stopped.
During start off, the electric
motor (traction motor) drives the
Hybrid system features
Your vehicle is a Hybrid Electric Vehicle. It has characteristi
cs
different from conventional vehicles. Be sure you are closely
familiar with the characteristics of your vehicle, and operate it
with care.
The hybrid system combines the use of a gasoline engine and
an electric motor (traction motor) according to driving condi-
tions, improving fuel efficiency and reducing exhaust emis-
sions.
System components

751-4. Hybrid system
Owners Manual_USA_M0C052_en
1
For safety and security
■Charging the 1 2-volt battery
 P. 5 3 1
■After the 12-volt battery has dis-
charged or when the terminal
has been removed and installed
during exchange, etc.
The gasoline engine may not stop
even if the vehicle is being driven by
the hybrid battery (traction battery).
If this continues for a few days, con-
tact your Toyota dealer.
■Sounds and vibrations specific
to a Hybrid Electric Vehicle
There may be no engine sound or
vibration even though the vehicle is
able to move with the “READY” indi-
cator is illuminated. For safety, apply
the parking brake and make sure to
shift the shift lever to P when
parked.
The following sounds or vibrations
may occur when the hybrid system
is operating and are not a malfunc-
tion:
●Motor sounds may be heard from
the engine compartment.
●Sounds may be heard from the
hybrid battery (traction battery)
under the rear seats when the
hybrid system starts or stops.
●Relay operating sounds such as a
snap or soft clank will be emitted
from the hybrid battery (traction
battery), under the rear seats,
when the hybrid system is started
or stopped.
●Sounds may be heard from the
transmission when the gasoline
engine starts or stops, when driv-
ing at low speeds, or during idling.
●Engine sounds may be heard
when accelerating sharply.
●Sounds may be heard due to
regenerative braking when the
brake pedal is dep ressed or as
the accelerator pedal is released.
●Vibration may be felt when the
gasoline engine starts or stops.
●Cooling fan sounds may be heard
from the air intake vents on the
side of the lower part of the rear
seat.
■Maintenance, repair, recycling,
and disposal
Contact your Toyota dealer regard-
ing maintenance, repair, recycling
and disposal. Do n ot dispose of the
vehicle yourself.
When the gasoline engine is off
while driving, a sound is pro-
duced to warn pedestrians, peo-
ple riding bicycles or other
people and vehicles in the sur-
rounding area that the vehicle is
approaching. The pitch of the
sound adjusts according to vehi-
cle speed. When vehicle speed
is approximately 22 mph (35
km/h) or more, the warning sys-
tem turns off.
■Acoustic vehicle alerting sys-
tem
In the following cases, the acoustic
vehicle alerting system sound may
be difficult for pedestrians, people
riding bicycles or other people and
vehicles in the surrounding area to
hear:
●When there is a lot of noise in the
vicinity
●When it is raining or during strong
winds
Acoustic vehicle alerting
system

771-4. Hybrid system
Owners Manual_USA_M0C052_en
1
For safety and security
started, refuel th e vehicle with at
least enough gasoline to make the
low fuel level warning light ( P.507)
go off. If there is only a small
amount of fuel, th e hybrid system
may not be able to start. (The stan-
dard amount of fuel is about 21.9 L
[5.8 gal., 4.8 Imp. gal.] when the
vehicle is on a level surface. This
value may vary whe n the vehicle is
on a slope. Add extra fuel when the
vehicle is inclined.)
■Electromagnetic waves
●High voltage parts and cables on
Hybrid Electric Vehicles incorpo-
rate electromagnetic shielding,
and therefore emi t approximately
the same amount of electromag-
netic waves as conventional gaso-
line powered vehicles or home
electronic appliances.
●Your vehicle may cause sound
interference in so me third party-
produced radio parts.
■Hybrid battery (tr action battery)
The hybrid battery (traction battery)
has a limited service life. The lifes-
pan of the hybrid battery (traction
battery) can change in accordance
with driving style and driving condi-
tions.
■Starting the hybrid system in an
extremely cold environment
When the hybrid battery (traction
battery) is extremely cold (below
approximately -31°F [-35°C]) under
the influence of t he outside tem-
perature, it may no t be possible to
start the hybrid system. In this case,
try to start the hybrid system again
after the temperature of the hybrid
battery increases due to the outside
temperature increase etc.
WARNING
■High voltage precautions
This vehicle has high voltage DC
and AC systems as well as a 12-
volt system. DC and AC high volt-
age is very dangerous and can
cause severe burns and electric
shock that may result in death or
serious injury.
●Never touch, disassemble,
remove or replace the high volt-
age parts, cables or their con-
nectors.
●The hybrid system will become
hot after starting as the system
uses high voltage. Be careful of
both the high voltage and the
high temperature, and always
obey the warning labels
attached to the vehicle.
●Never try to open the service
plug access hole located under
the right side o f the rear seat.
The service plug is used only
when the vehicle is serviced
and is subject to high voltage.
■Road accident cautions
Observe the following precautions
to reduce the risk of death or seri-
ous injury:
●Stop the vehicle in a safe place
to prevent subsequent acci-
dents. While depressing the
brake pedal, apply the parking
brake and shift the shift lever to
P to stop the hybrid system.
Then, slowly release the brake
pedal

791-4. Hybrid system
Owners Manual_USA_M0C052_en
1
For safety and security
There are air intake vents under
the rear seat for the purpose of
cooling the hybrid battery (trac-
tion battery).
If the vents are blocked, it may
interfere with the cooling of the
hybrid battery (traction battery).
If input/output of the hybrid battery
(traction battery) becomes limited
and the distance that the vehicle
can be driven using the electric
motor (traction motor) is reduced,
the fuel economy may be reduced.
When a certain level of impact is
detected by the impact sensor,
the emergency shut off system
blocks the high voltage current
and stops the fuel pump to mini-
mize the risk of electrocution
and fuel leakage. If the emer-
gency shut off system activates,
your vehicle will not restart. To
restart the hybrid system, con-
tact your Toyota dealer.
A message is automatically dis-
played when a malfunction
occurs in the hybrid system or
an improper operation is
attempted.
NOTICE
■Hybrid battery (traction bat-
tery)
Do not carry large amounts of
water such as water cooler bottles
in the vehicle. If water spills onto
the hybrid battery (traction bat-
tery), the batte ry may be dam-
aged. Have the vehicle inspected
by your Toyota dealer.
Hybrid battery (traction
battery) air intake vents
NOTICE
■Hybrid battery (traction bat-
tery) air intake vents
●Make sure not to block the air
intake vents with anything, such
as a seat cover, plastic cover, or
luggage.
The input/output of the hybrid
battery (traction battery) may be
restricted, leading to a reduction
in hybrid battery (traction bat-
tery) output and a malfunction.
●Periodically clean the air intake
vents to prevent them from clog-
ging. ( P.481)
●Do not get water or foreign
materials in the air intake vents
as this may cause a short circuit
and damage the hybrid battery
(traction battery).
Emergency shut off sys-
tem
Hybrid warning message

811-5. Theft deterrent system
Owners Manual_USA_M0C052_en
1
For safety and security
1-5.Theft deterrent system
The indicator light flashes after
the power switch has been
turned off to indicate that the
system is operating.
The indicator light stops flashing
after the power switch has been
turned to ACC or ON to indicate
that the system has been can-
celed.
■System maintenance
The vehicle has a maintenance-free
type immobilizer system.
■Conditions that may cause the
system to malfunction
●If the grip portion of the key is in
contact with a metallic object
●If the key is in close proximity to or
touching a key to the security sys-
tem (key with a built-in transpon-
der chip) of another vehicle
■Certification
 P. 6 1 1
Immobilizer system
The vehicle’s keys have
built-in transponder chips
that prevent the hybrid sys-
tem from starting if a key
has not been previously
registered in the vehicle’s
on-board computer.
Never leave the keys inside
the vehicle when you leave
the vehicle.
This system is designed to
help prevent vehicle theft
but does not guarantee
absolute security against all
vehicle thefts.
Operating the system
NOTICE
■To ensure the system oper-
ates correctly
Do not modify or remove the sys-
tem. If modified or removed, the
proper operation of the system
cannot be guaranteed.