Get Electric Vehicle system -> Electric Vehicle system precautions Guide for Toyota bZ4X SUV Second Generation (2025-2026)

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2-1. Electric vehicle system

Electric Vehicle system precautions

Be careful of the high voltage components (nominal voltage

at 355.2 V), such as the traction battery, electricity supply

unit, orange colored high voltage cables, and electric motor,

as well as high temperature components such as the cooling

radiator, which are provided on the battery electric vehicle.

For the high voltage components, warning labels are pro-

vided on them. Read them when they need to be handled.

System components

The illustration is an example for explanation and may differ from the actual

item.

Warning label

High voltage cables (orange)

ESU: Electricity Supply Unit (built in onboard traction battery

charger/DC-DC converter)

Service plug

AC charging inlet

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2-1. Electric vehicle system

DC charging inlet

Traction battery

Electric motor (traction motor)/Inverter (front/rear^*)

Air conditioning compressor

: AWD models only

*

■Starting the EV system in an

extremely cold environment

■Electromagnetic waves

●High-voltage parts and cables on

the battery electric vehicles incor-

porate electro-magnetic shield-

ing, and therefore emit

When the traction battery is

extremely cold (below approxi-

mately -22°F [-30°C]) due to the

temperature outside of the vehicle, it

may not be possible to start the EV

system. In this case, try to start the

EV system again after the tempera-

ture of the traction battery increases

due to the outside temperature

increasing, etc.

2

approximately the same amount

of electromagnetic waves as con-

ventional gasoline-powered vehi-

cles or home electronic

appliances.

●Your vehicle may cause sound

interference in some third party-

produced radio parts.

WARNING

■Traction battery (Lithium-ion

■High-voltage precautions

battery)

The vehicle has high voltage DC

and AC systems as well as a 12-

volt system.

The traction battery has a limited

service life.

The traction battery capacity (the

ability to store energy) reduces with

time and use in the same way as

other rechargeable batteries. The

extent at which capacity reduces

changes drastically depending on

the environment (outside tempera-

ture, etc.) and usage conditions,

such as how the vehicle is driven

and how the traction battery is

charged.

DC and AC high voltage systems

are 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 (orange) or

their connectors.

●The EV 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

This is a natural characteristic of

lithium-ion batteries, and is not a

malfunction. Also, even though the

driving range decreases when the

traction battery capacity reduces,

vehicle performance does not sig-

nificantly become worse. In order to

reduce the possibility of the capacity

reducing, follow the directions listed

on P.103, “Capacity reduction of the

traction battery”.

attached to the vehicle.

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2-1. Electric vehicle system

WARNING

●Do not touch the traction battery

if liquid is leaking from or

●Never try to open the service

plug access hole located under

the floor. The service plug is

used only when the vehicle is

being serviced and is subject to

high voltage.

adhered to it. If electrolyte

(Organic Carbonate-based

electrolyte) from the traction

battery comes into contact with

the eyes or skin, it could cause

blindness or skin wounds. In the

unlikely event that it comes into

contact with the eyes or skin,

wash it off immediately with a

large amount of water, and seek

immediate medical attention.

●If electrolyte is leaking from the

traction battery, do not

approach the vehicle.

Even in the unlikely event that

the traction battery has been

damaged, the internal construc-

tion of the battery will prevent a

large amount of electrolyte from

leaking out. However, if electro-

lyte leaks, vapors will be emit-

ted. These vapors are an irritant

to skin and eyes and could

cause acute poisoning if

■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 position

to P to stop the EV system.

Then, slowly release the brake

pedal.

inhaled.

●Do not bring burning or high-

temperature items close to the

electrolyte. The electrolyte may

ignite and cause a fire.

●Do not touch the high voltage

parts, cables (orange) and con-

nectors.

●If a fire occurs in the battery

electric vehicle, leave the vehi-

cle as soon as possible. Never

use a fire extinguisher that is

not meant for electrical fires.

Using even a small amount of

water may be dangerous.

●If electric wires are exposed

inside or outside your vehicle,

an electric shock may occur.

Never touch exposed electric

wires.

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2-1. Electric vehicle system

• Do not illegally dispose of or

WARNING

dump the traction battery, and it

is hazardous to the environment

or someone may touch a high

voltage part, resulting in an

electric shock.

●If your vehicle needs to be

towed, be sure to transport the

vehicle with the front wheels

(2WD models) or four wheels

(AWD models) raised. If the

vehicle is towed with the wheels

which are connected to the

electric motor (traction motor)

contacting the ground, electric-

ity generated by the operation of

the motor may cause a fire to

occur depending on the nature

of the damage or malfunction.

(P.507)

• The traction battery is intended

to be used exclusively with your

battery electric vehicle. If the

traction battery is used outside

of your vehicle or modified in

any way, accidents such as

electric shock, heat generation,

smoke generation, an explo-

sion and electrolyte leakage

may occur. When reselling or

handing over your vehicle, the

possibility of an accident is

extremely high because the per-

son receiving the vehicle may

not be aware of the dangers

from these modifications.

2

●Carefully inspect the ground

under the vehicle. If leaked liq-

uid (other than water from the

air conditioning) is found on the

ground, the traction battery may

have been damaged. Leave the

vehicle as soon as possible.

In addition, contact your Toyota

dealer with regard to the leak-

age found on the ground.

Even in the event of a minor

accident, the traction battery

and surrounding parts may be

damaged. In case of an acci-

dent, have the traction battery

inspected at a Toyota dealer.

●If your vehicle is disposed of

without the traction 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 traction bat-

tery must be disposed of by

your Toyota dealer or a qualified

service shop. If the traction bat-

tery is not disposed of properly,

it may cause electric shock that

can result in death or serious

injury.

■Traction battery

●Your vehicle contains a sealed

lithium-ion battery.

●Never resell, hand over or mod-

ify the traction battery. To pre-

vent accidents, traction

●For information about traction

battery collection locations, con-

tact information, or the recycling

process, contact your Toyota

dealer.

batteries that have been

removed from a disposed vehi-

cle are collected through your

Toyota dealer. Do not dispose of

the battery yourself. Unless the

battery is properly collected, the

following may occur, resulting in

death or serious injury:

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2-1. Electric vehicle system

WARNING

turns off the EV system and

blocks the high voltage current.

If the emergency shut off system

activates, your vehicle will not

restart. To restart the EV sys-

tem, contact your Toyota dealer.

■Caution while driving

●Pay special attention to the area

around the vehicle. Because

there is no engine noise, pedes-

trians, people riding bicycles or

other people and vehicles in the

area may not be aware of the

vehicle starting off or approach-

ing them, so take extra care

while driving. Therefore, take

extra care while driving even if

the Acoustic Vehicle Alerting

System is active.

Warning message

A message is automatically dis-

played when a malfunction

occurs in the EV system or an

improper operation is attempted.

●If the vehicle under floor area

receives strong shock or impact

while driving, stop the vehicle in

a safe place and check around

the bottom of the vehicle. If

there is damage to the traction

battery or liquid leakage, it may

lead to a vehicle fire, etc. Do not

touch the vehicle and immedi-

ately contact your Toyota dealer.

Even if no damage can be seen

under the floor, the traction bat-

tery may be damaged. If the

vehicle received an impact

under the floor, have the traction

battery inspected at a Toyota

dealer.

If a warning message is shown

on the multi-information display,

read the message and follow the

instructions. (P.140, 522)

■Modifications

Do not make modifications that

lower the height of the vehicle.

The traction battery in the under

floor area may come into contact

with the ground when the height

of vehicle is lowered. If the trac-

tion battery is damaged, a vehicle

fire may occur, possibly resulting

in death or serious injury.

■If a warning light comes on, a

warning message is displayed,

or the 12-volt battery is discon-

nected

The EV system may not start.

In that case, try to start the system

again. If the “READY” indicator does

not come on, contact your Toyota

dealer.

■When the traction battery is

Emergency shut off sys-

tem

completely discharged

When the EV system cannot be

started due to the traction battery

being completely discharged, restart

the system after AC charging or DC

charging. When charging, it is rec-

When a certain level of impact is

detected by the impact sensors,

the emergency shut off system

Owners Manual_USA_M42C01_en

Electric Vehicle system -> Electric Vehicle system precautions for Your Toyota bZ4X SUV Second Generation (2025-2026)

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