2021 TOYOTA HIGHLANDER HYBRID ECU

691-3. Emergency assistance
1
For safety and security
HIGHLANDER HV_U
■Emergency Assistance But-
ton (“SOS”)
In the event of an emergency on
the road, push the “SOS” button
to reach the Safety Connect
response center. The answer-
ing agent will determine your
vehicle’s location, assess the
emergency, and dispatch the
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 Enhanced
Roadside Assistance services
and their limitations, please see
the Safety Connect Terms and
Conditions, which are available
at Toyota.com in the United
States, Toyotapr.com in Puerto
Rico and Toyota.ca in Canada.
Important! Read this informa- tion before using Safety Con-
nect.
■Exposure to radio fre-
quency signals
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
Safety information for
Safety Connect

711-4. Hybrid system
1
For safety and security
HIGHLANDER HV_U
1-4.Hybrid system
■System components
The illustration is an example for explanation and may differ from the actual
item.
Gasoline engine
Front electric motor (traction motor)
Rear electric motor (traction motor)
*
*: AWD models only
■When stopped/during start
off
The gasoline engine stops
*
when the vehicle is stopped. During start off, the electric
motor (traction motor) drives the
vehicle. At slow speeds or when
traveling down a gentle slope,
the engine is stopped
* and the
Hybrid system features
Your vehicle is a hybrid vehicle. It has characteristics differ
ent
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

731-4. Hybrid system
1
For safety and security
HIGHLANDER HV_Uand you are unable to start the
hybrid system, contact your Toyota
dealer.
■Charging the 1
2-volt battery
 P. 4 9 8
■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 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 from the hybrid system
may be heard when the back door
is open.
●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 depressed 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 under the
rear seats.
■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 driving with the gasoline
engine stopped, a sound, which
changes in accordance with the
driving speed, will be played in
order to warn people nearby of
the vehicle’s approach. The
sound will stop when the vehicle
speed exceeds approximately
22 mph (35 km/h).
■Acoustic vehicle alerting sys-
tem
In the following cases, the acoustic
vehicle alerting system may be diffi-
cult for surrounding people to hear.
●In very noisy areas
●In the wind or the rain
Also, as the acoustic vehicle alerting
system is installed on the front of the
vehicle, it may be more difficult to
hear from the rear of the vehicle
compared to the front.
Acoustic vehicle alerting
system

751-4. Hybrid system
1
For safety and security
HIGHLANDER HV_UThe illustration is an example for
explanation and may differ from the actual
item.
Warning label
Service plug
High voltage cables (orange)
Power control unit
Hybrid battery (traction battery)
Rear electric motor (traction motor)
*
Front electric motor (traction motor)
Air conditioning compressor
*: AWD models only
■Running out of fuel
When the vehicle has run out of fuel
and the hybrid system cannot be
started, refuel th e vehicle with at least enough gasoline to make the
low fuel level warning light (
P.469)
go off. If there is only a small
amount of fuel, the hybrid system
may not be able to start. (The stan-
dard amount of fuel is about 2.9 gal.
Hybrid system precautions
Take care when handling the hybrid system, as it is a high
voltage system (about 650 V at maximum) as well as contains
parts that become extremely hot when the hybrid system is
operating. Obey the warning labels attached to the vehicle.
System components

771-4. Hybrid system
1
For safety and security
HIGHLANDER HV_U
There are air intake vents under
each side of the rear seatback
for the purpose of cooling the
hybrid battery (traction battery).
If the vent is blocked,
charging/discharging of the
hybrid battery (traction battery)
may become limited.
WARNING
●If your vehicle needs to be
towed, do so with all four
wheels raised. If the wheels
connected to the electric motor
(traction motor) are on the
ground when towing, the motor
may continue to generate elec-
tricity. This may cause a fire.
(  P.461)
●Carefully inspect the ground
under the vehicle. If you find
that liquid has leaked onto the
ground, the fuel system may
have been damaged. Leave the
vehicle as soon as possible.
■Hybrid battery (traction bat-
tery)
●Never resell, hand over or mod-
ify the hybrid battery. To prevent
accidents, hybrid batteries that
have been removed from a dis-
posed vehicle are collected
through your Toyota dealer. Do
not dispose of the battery your-
self.
Unless the battery is properly col-
lected, the following may occur,
resulting in dea th or serious
injury:
• The hybrid battery may be ille- gally disposed of or dumped,
and it is hazardous to the envi-
ronment or someone may touch
a high voltage part, resulting in
an electric shock.
• The hybrid battery is intended to be used exclusively with your
hybrid vehicle. If the hybrid bat-
tery is used outside of your
vehicle or modified in any way,
accidents such as electric
shock, heat generation, smoke
generation, an explosion and
electrolyte leakage may occur.
When reselling or handing over
your vehicle, the possibility of an
accident is extremely high
because the person receiving the
vehicle may not be aware of these
dangers.
●If your vehicle is disposed of
without the hybrid battery hav-
ing been removed, there is a
danger of serious electric shock
if high voltage parts, cables and
their connectors are touched. In
the event that your vehicle must
be disposed of, the hybrid bat-
tery must be disposed of by
your Toyota dealer or a qualified
service shop. If the hybrid bat-
tery is not disposed of properly,
it may cause electric shock that
can result in dea th or serious
injury.
NOTICE
■Hybrid battery (traction bat-
tery) air intake vents
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 battery may be dam-
aged. Have the vehicle inspected
by your Toyota dealer.
Hybrid battery (traction
battery) air intake vent

791-5. Theft deterrent system
1
For safety and security
HIGHLANDER HV_U
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 mainte-
nance-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 registered to the
security system (key with a built-in
transponder chip) of another vehi-
cle
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

811-5. Theft deterrent system
1
For safety and security
HIGHLANDER HV_U
*: If equipped
■Items to check before lock-
ing the vehicle
To prevent unexpected trigger-
ing of the alarm and vehicle
theft, make sure of the following:
 Nobody is in the vehicle.
 The windows, moon roof (if
equipped) and panoramic
moon roof (if equipped) are
closed before the alarm is set.
 No valuables or other per-
sonal items are left in the
vehicle.
■Setting
Close the doors and hood, and
lock all the doors. The system will be set automatically after 30
seconds.
The security indicator changes from
being on to flashing when the sys-
tem is set.
■Canceling or stopping
Do one of the following to deac-
tivate or stop the alarms:
 Unlock the doors.
 Turn the power switch to ACC
or ON, or start the hybrid sys-
tem. (The alarm will be deacti-
vated or stopped after a few
seconds.)
■System maintenance
The vehicle has a mainte-
nance-free type alarm system.
■Triggering of the alarm
The alarm may be triggered in the
following situations:
(Stopping the alarm deactivates the
alarm system.)
●A person inside the vehicle opens
a door or hood, or unlocks the
vehicle.
Alarm*
The alarm uses light and
sound to give an alert when
an intrusion is detected.
The alarm is triggered in the
following situations when
the alarm is set:
 A locked door is unlocked or
opened in any way other
than using the entry func-
tion, wireless remote control
or mechanical key. (The
doors will lock again auto-
matically.)
 The hood is opened.
Setting/canceling/stop-
ping the alarm system

872-1. Instrument cluster
2
Vehicle status information and indicators
HIGHLANDER HV_U
Drive mode indicators
*1: 7-inch display only: This light illu-
minates on the multi-information
display.
*2: This light illuminates on the multi-information display.
*3: This light comes on when the system is turned off.
*4: These lights tu rn on when the
power switch is turned to ON to
indicate that a system check is
being performed. They will turn
Front fog light indicator
*1
(  P.235)
PCS warning light
*3, 4
(  P.252)
Cruise control indicator
*2
(  P.279)
Dynamic radar cruise con-
trol indicator
*2 (  P.271)
Cruise control “SET” indi-
cator
*2 (  P.271)
(white)
LTA i n d i c a t o r*2 ( P.266)
(green)
LTA i n d i c a t o r*2 ( P.249,
266)
(orange)
(flashes)LTA i n d i c a t o r*2 (  P.266)
BSM outside rear view
mirror indicators
*5, 6
(  P.286, 300)
BSM OFF indicator
*2, 3
(  P.286)
Intuitive parking assist
OFF indicator
*3, 4, 9(if
equipped) (P.293)
RCTA OFF indicator
*2, 3
(  P.300)
PKSB OFF indicator
*3, 4,
9
(if equipped) ( P.306)
(flashes)
Slip indicator*4 ( P.326)
VSC OFF indicator
*3, 4
(  P.327)
Smart key system indica-
tor
*2 (  P.213)
“READY” indicator
(  P.213)
EV drive mode indicator*1
(  P.218)
(U.S.A.)
Parking brake indicator*4
(  P.224)
(Canada)
Parking brake indicator*4
(  P.224)
Brake hold standby indica-
tor
*4 (  P.227)
Brake hold operated indi-
cator
*4 (  P.227)
EV indicator
*1 (  P. 7 2 )
Low outside temperature
indicator
*2, 7 (  P. 8 9 )
Security indicator
*8
(  P.79, 81)
“PASS AIR BAG ON/OFF”
indicator
*4, 8 (  P. 4 3 )
Eco drive mode indicator
*2
(  P.322)
Sport mode indicator
*2
(  P.322)
Trail Mode indicator
*2 (if
equipped) ( P.323)