key TOYOTA BZ4X 2022 (in English) Repair Manual

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7-3. Do-it-yourself maintenance
connect the ground cable.
●Make sure the power switch on the charger is off when connecting and
disconnecting the charger cables to the 12-volt battery.
■After recharging/reconnecting the 12-volt battery
●The EV system may not start. Follow the procedure below to initialize the
system.
1 Shift the shift position to P.
2 Open and close any of the doors.
3 Restart the EV system.
●Unlocking the doors using the smart
entry & start system may not be possi- ble immediately after reconnecting the 12-volt battery. If this happens, use
the wireless remote control or the mechanical key to lock/unlock the doors.
●Start the EV system with the power switch in ACC. The EV system may
not start with the power switch turned off. However, the EV system will oper-ate normally from the second attempt.
●The power switch mode is recorded by the vehicle. If the 12-volt battery is
disconnected and reconnected, the vehicle will return the power switch mode to the status it was in before the
12-volt battery was disconnected. Make sure to turn off the power switch before disconnecting the 12-volt bat-
tery. Take extra care when connecting the 12-volt battery if the power switch mode prior to the 12-volt battery being
disconnected is unknown.
If the EV system will not start even after
multiple attempts at all the methods
above, contact any authorized Toyota
retailer or Toyota authorized repairer, or
any reliable repairer.
WARNING
■Chemicals in the 12-volt battery
Batteries contain poisonous and cor-
rosive sulfuric acid and may produce hydrogen gas which is flammable and explosive. To reduce the risk of death
or serious injury, take the following precautions while working on or near the 12-volt battery:
●Do not cause sparks by touching the 12-volt battery terminals with tools.
●Do not smoke or light a match near the 12-volt battery.
●Avoid contact with eyes, skin and clothes.
●Never inhale or swallow electrolyte.
●Wear protective safety glasses when working near the 12-volt bat-tery.
●Keep children away from the 12-volt battery.
■Where to safely charge the 12-volt battery
Always charge the 12-volt battery in an open area. Do not charge the 12-volt battery in a garage or closed
room where there is insufficient venti- lation.
■Emergency measures regarding electrolyte
●If electrolyte gets in your eyes
Flush your eyes with clean water for at least 15 minutes and get immedi-ate medical attention. If possible,
continue to apply water with a sponge or cloth while traveling to the nearest medical facility.
●If electrolyte gets on your skinWash the affected area thoroughly.
If you feel pain or burning, get med- ical attention immediately.

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7-3. Do-it-yourself maintenance
Maintenance and care
■If the electronic key battery is
depleted
The following symptoms may occur:
●The smart entry & start system and wireless remote control will not func-tion properly.
●The operational range will be reduced.
Prepare the following before replac-
ing the battery:
 Flathead screwdriver
 Small flathead screwdriver
 Lithium battery CR2450
■Use a CR2450 lithium battery
●Batteries can be purchased at any authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer, local electrical appliance shops or camera stores.
●Replace only with the same or equiva-lent type recommended by the manu-facturer.
●Dispose of used batteries according to the local laws.
NOTICE
■To prevent damage to the filter cover
When moving the filter cover in the direction of arrow to release the fit-ting, pay attention not to apply exces-
sive force to the claws. Otherwise, the claws may be damaged.
Electronic key batter y
Replace the battery with a new
one if it is depleted.
Items to prepare

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7-3. Do-it-yourself maintenance
1Remove the lock and take out
the mechanical key.
2 Remove the cover.
Use a screwdriver of an appropriate size. Forcedly prying may cause the cover damaged.
To prevent damage to the key, cover the tip of the flathead screwdriver with a rag.
3 Remove the depleted battery
using a small flathead screw-
driver.
When removing the cover, the elec- tronic key module may stick to the cover and the battery may not be visi-
ble.
In this case, remove the electronic key module in order to remove the battery.
When removing the battery, use a screwdriver of an appropriate size.
Insert a new battery with the “+” termi-
nal facing up.
4 When installing the key cover
and mechanical key, install by
conducting step 2 and step 1
with the directions reversed.
Replacing the battery
WARNING
■Battery precautions
Observe the following precautions.
Failure to do so may result in death or serious injury.
●Do not swallow the battery. Doing
so may cause chemical burns.
●A coin battery or button battery is
used in the electronic key. If a bat- tery is swallowed, it may cause severe chemical burns in as little as
2 hours and may result in death or serious injury.
●Keep away new and removed bat-teries from children.
●If the cover cannot be firmly closed, stop using the electronic key and stow the key in the place where
children cannot reach, and then contact any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
●If you accidentally swallow a battery
or put a battery into a part of your body, get emergency medical atten-tion immediately.

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7-3. Do-it-yourself maintenance
Maintenance and care
1Turn the power switch off.
Confirm that the charging connector is not connected. Also, do not use the
Remote Air Conditioning System during the procedure.
2 Open the fuse box cover.
Motor compartment
Push the tab in and lift the lid off.
Left side instrument panel (left-
hand drive vehicles)
Remove the lid.
WARNING
■To prevent battery explosion or leakage of flammable liquid or
gas
●Replace the battery with a new bat- tery of the same type. If a wrong
type of battery is used, it may explode.
●Do not expose batteries to extremely low pressure due to high altitude or extremely high tempera-
tures.
●Do not burn, break or cut a battery.
■Certification for the electronic key battery
CAUTION RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT
TYPE. DISPOSE OF USED BATTERIES ACCORDING TO THE
INSTRUCTIONS.
NOTICE
■When replacing the battery
Use a screwdriver of appropriate size. Applying excessive force may deform or damage the cover.
■For normal operation after replacing the battery
Observe the following precautions to prevent accidents:
●Always work with dry hands.
Moisture may cause the battery to rust.
●Do not touch or move any other component inside the remote con-trol.
●Do not bend either of the battery terminals.
Checking and replacing
fuses
If any of the electrical compo-
nents do not operate, a fuse
may have blown. If this hap-
pens, check and replace the
fuses as necessary.
Checking and replacing
fuses

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8
When trouble arises
When trouble arises
8-1. Essential information
Emergency flashers .......... 506
If your vehicle has to be
stopped in an emergency 506
If the vehicle is submerged or
water on the road is rising
....................................... 507
8-2. Steps to take in an emer-
gency
If your vehicle needs to be
towed .............................. 509
If you think something is wrong
....................................... 513
If a warning light turns on or a
warning buzzer sounds... 515
If a warning message is dis-
played ............................. 523
If you have a flat tire ......... 528
If the EV system will not start
....................................... 539
If you lose your keys ......... 541
If the charging port lids cannot
be opened ...................... 541
If the electronic key does not
operate properly ............. 542
If the 12-volt battery is dis-
charged .......................... 544
If your vehicle overheats... 549
If the vehicle becomes stuck
....................................... 551

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8-2. Steps to take in an emergency
When trouble arises
One of the following may be the
cause of the problem:
 The charging cable may be con-
nected to the vehicle. ( P.118)
 The electronic key may not be
functioning properly.* ( P.542)
 The traction battery may be com-
pletely discharged. Charge the
traction battery. ( P. 1 1 4 )
 There may be a malfunction in
the immobilizer system.* ( P.75)
 There may be a malfunction in
the shift control system.*
( P.245, 527)
 On some models: There may be
a malfunction in the steering lock
NOTICE
■Precautions for the emergency tire puncture repair kit
●The repair kit power source should be 12 V DC suitable for vehicle use. Do not connect the repair kit to any
other source.
●Place the repair kit in a storage to
prevent it from being exposed to dirt or water.
●Store the repair kit in the luggage compartment out of reach of chil-dren.
●Do not disassemble or modify the repair kit. Do not subject parts such
as the air pressure indicator to impacts. This may cause a malfunc-tion.
■To avoid damage to the tire pres-sure warning valves and trans-
mitters
When a tire is repaired with liquid sealants, the tire pressure warning
valve and transmitter may not operate properly. If a liquid sealant is used, contact any authorized Toyota retailer
or Toyota authorized repairer, or any reliable repairer or other qualified ser-vice shop as soon as possible. After
use of liquid sealant, make sure to replace the tire pressure warning valve and transmitter when repairing
or replacing the tire. ( P.479)
If the EV system will not
start
Reasons for the EV system not
starting vary depending on the
situation. Check the following
and perform the appropriate
procedure:
Contact any authorized Toyota
retailer or Toyota authorized
repairer, or any reliable
repairer if the problem cannot
be repaired, or if repair proce-
dures are unknown.
The EV system will not start
even though the correct
starting procedure is being
followed. ( P. 2 4 3 )

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8-2. Steps to take in an emergency
system.
 The EV system may be malfunc-
tioning due to an electrical prob-
lem such as electronic key
battery depletion or a blown fuse.
However, depending on the type
of malfunction, an interim mea-
sure is available to start the EV
system. ( P.540)
 There is a possibility that the
temperature of the traction bat-
tery is extremely low (approxi-
mately below -30°C [-22°F]).
( P.87, 244)
*: It may not be possible to shift the shift
position from P.
One of the following may be the
cause of the problem:
 The 12-volt battery may be dis-
charged. ( P.544)
 The 12-volt battery terminal con-
nections may be loose or cor-
roded. ( P.473)
One of the following may be the
cause of the problem:
 One or both of the 12-volt battery
terminals may be disconnected.
( P.473)
 The 12-volt battery may be dis-
charged. ( P.544)
Contact any authorized Toyota retailer
or Toyota authorized repairer, or any
reliable repairer if the problem cannot
be repaired, or if repair procedures are
unknown.
When the EV system does not
start, the following steps can be
used as an interim measure to start
the EV system if the power switch
is functioning normally.
Do not use this starting procedure
except in cases of emergency.
1 Set the parking brake.
2 Turn the power switch to ACC.*
3Press and hold the power switch
for about 15 seconds while
depressing the brake pedal
firmly.
Even if the EV system can be
started using the above steps, the
system may be malfunctioning.
Have the vehicle inspected by any
authorized Toyota retailer or Toyota
authorized repairer, or any reliable
repairer.
*: Setting can be customized. ( P.567)
The interior lights and head-
lights are dim, or the horn
does not sound or sounds at
a low volume.
The interior lights and head-
lights do not turn on, or the
horn does not sound.
Emergency start function

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8-2. Steps to take in an emergency
When trouble arises
1Open the hood.
2 Pull the ring section of the emer-
gency release lever and
remove.
3 Pull the ring section horizontally
toward the inside of the vehicle.
After the unlocking operation is com- pleted, push the ring part back to its
original position until it clicks into place.
Emergency release lever
■When unlocking with the emer- gency release lever
Be sure to observe the following.
If you lose your keys
New genuine keys can be
made by any authorized
Toyota retailer or Toyota
authorized repairer, or any reli-
able repairer using another key
and the key number stamped
on your key number plate.
Keep the plate in a safe place
such as your wallet, not in the
vehicle.
NOTICE
■When an electronic key is lost
If the electronic key remains lost, the
risk of vehicle theft increases signifi- cantly. Visit any authorized Toyota retailer or Toyota authorized repairer,
or any reliable repairer immediately with all remaining electronic keys that were provided with your vehicle.
If the charging port lids
cannot be opened
If the charging port lids cannot
be opened when using the nor-
mal procedure, the following
procedure can be used to open
the charging port lids.
Opening the charging port
lids

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8-2. Steps to take in an emergency
●Do not apply excessive force to the
ring part
●Do not pull horizontally too much
Use only in an emergency.
If the problem persists, have the vehicle
inspected any authorized Toyota retailer
or Toyota authorized repairer, or any reli-
able repairer immediately if this occurs.
■When the electronic key does not work properly
●Make sure that the smart entry & start system has not been deactivated at any authorized Toyota retailer or
Toyota authorized repairer, or any reli- able repairer. If it is off, turn the func-tion on.
●Check if battery-saving mode is set. If it is set, cancel the function. ( P.204)
Use the mechanical key (P.184)
If the electronic key
does not operate prop-
erly
If communication between the
electronic key and vehicle is
interrupted ( P.204) or the
electronic key cannot be used
because the battery is
depleted, the smart entry &
start system and wireless
remote control cannot be
used. In such cases, the doors
can be opened and the EV sys-
tem can be started by follow-
ing the procedure below.
NOTICE
■In case of a smart entry & start system malfunction or other key-related problems
Take your vehicle with all the elec- tronic keys provided with your vehicle, to any authorized Toyota retailer or
Toyota authorized repairer, or any reli- able repairer.
Locking and unlocking the
doors

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8-2. Steps to take in an emergency
When trouble arises
in order to perform the following
operations:
1 Locks all the doors
2 Unlocks all the doors
■Key linked functions
1 Closes the windows (turn and hold)*
2Opens the windows (turn and hold)*
*: These settings must be customized at
any authorized Toyota retailer or
Toyota authorized repairer, or any reli-
able repairer.
1 Depress the brake pedal.
2 Touch the electronic key to the
power switch.
When the electronic key is detected, a buzzer sounds and the power switch
will turn to ON. When the smart entry & start system is deactivated in customization setting,
the power switch will turn to ACC.
3 Firmly depress the brake pedal
and check that is shown on
the multi-information display.
4 Press the power switch.
In the event that the EV system still cannot be started, contact any autho-rized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer.
WARNING
■When using the mechanical key and operating the power win-
dows
Operate the power window after checking to make sure that there is no
possibility of any passenger having any of their body parts caught in the window.
Also, do not allow children to operate the mechanical key. It is possible for children and other passengers to get
caught in the power window.
Starting the EV system