Lexus NX450H+ (2022 year). Manual in english - page 41

INFORMATION

■

When the 12-volt battery is removed or discharged

●

In some cases, it may not be possible to unlock the doors using the smart access
system with push-button start after the 12-volt battery has been replaced.
Use the wireless remote control or the mechanical key to lock or unlock the doors.

●

If the hybrid system cannot be started the first time the power switch is pressed
after removing and installing the 12-volt battery, touch the Lexus emblem side of the
electronic key to the power switch to start the hybrid system.

●

The power switch mode is memorized by the vehicle.
After the 12-volt battery has been recharged or replaced, the power switch will return
to the mode it was in before it was discharged or removed.
Before disconnecting the 12-volt battery, turn the power switch off.
If you are unsure what mode the power switch was in before the 12-volt battery was
discharged, be especially careful when reconnecting the 12-volt battery.

●

Some systems may require initialization.

■

To prevent 12-volt battery discharge

●

Turn off the headlights and the audio system while the hybrid system is off.

●

Turn off any unnecessary electrical components when the vehicle is running at a low
speed for an extended period, such as in heavy traffic.

■

If the vehicle 12-volt battery is discharged

●

The doors cannot be locked or unlocked using the smart entry & start system or
wireless remote control, and the door opener switches will not operate. Use the me-
chanical key to enable/disable manual release handle operation. By enabling manual
release handle operation, the door can be opened.

●

Information recorded by various computers will be cleared.
If the 12-volt battery has become discharged, have the vehicle inspected by your
Lexus dealer.

●

Some systems may require initialization.

■

Charging the 12-volt battery

The electricity stored in the 12-volt battery will discharge gradually even when the vehicle
is not in use, due to natural discharge and the draining effects of certain electrical
appliances.
If the vehicle is left for a long time, the 12-volt battery may discharge, and the hybrid
system may be unable to start.
(The 12-volt battery recharges automatically while the hybrid system is operating.)

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When tr

ouble arises

■

When replacing the 12-volt battery

●

Use a 12-volt battery that the case size is same as the previous one (LN2), 20 hour
rate capacity (20HR) is equivalent (60Ah) or greater, and performance rating (CCA)
is equivalent (345A) or greater.

•

If the sizes differ, the 12-volt battery cannot be properly secured.

•

If the 20 hour rate capacity of the replacement battery is low, even if the vehicle is
used frequently, the 12-volt battery may discharge and hybrid system may not be
able to start.

●

After replacing the 12-volt battery, install the following to the exhaust holes of the new
12-volt battery.

•

Use the exhaust hose that was attached to the removed 12-volt battery and make
sure that it is securely engaged to the hole in the vehicle.

•

Use the exhaust hole plug that is included with the new 12-volt battery or the one
installed to the removed 12-volt battery.

Contact your Lexus dealer for details.

Exhaust hole plug

Exhaust hole

Exhaust hose

Hole in vehicle

When the doors cannot be locked from outside the vehicle after the 12-volt
battery was discharged

The doors cannot be locked using the smart entry & start system or wireless
remote control.

*1 :

The exhaust holes of the new 12-volt battery may be plugged.

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674

Disabling the operation of the driver’s door

Insert a plastic card, etc. into the gap in the
door handle and remove the cover.

To avoid damage, do not apply excessive force to
the cover.

Using the mechanical key, turn the door lock
to the lock side to disable the door.

Check that the door cannot be opened.

Disabling the operation of doors other than the driver’s door

Open the door. Using the mechanical key,
slide the cover as shown in the illustration.

To avoid damage, do not apply excessive force to
the cover.

Insert the mechanical key into the opening.

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When tr

ouble arises

Remove the mechanical key and slide the
emergency lock cover back to its original
position.

Check that all of the doors cannot be opened.

When removing the 12-volt battery terminals

When disconnecting a 12-volt battery terminal, contact your Lexus dealer.
When disconnecting a 12-volt battery terminal, contact your Lexus dealer.
If a battery terminal is disconnected, the doors will not be able to be opened
using the door opener switches and the electronic key may become trapped in the
vehicle.
If a 12-volt battery terminal is disconnected, the doors will not be able to be opened
using the door opener switches and the electronic key may become trapped in the
vehicle.
To prevent the electronic key (mechanical key) from being locked inside the
vehicle, make sure to remove it from the vehicle before disconnecting a 12-volt
battery terminal.

If the electronic key (mechanical key) is to be left in the vehicle, make sure to open
a window so an inside manual release handle can be operated.

9-3. If the hybrid system will not start

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WARNING

■

When removing the 12-volt battery terminals

Always remove the negative (-) terminal first. If the positive (+) terminal contacts any
metal in the surrounding area when the positive (+) terminal is removed, a spark may
occur, leading to a fire in addition to electrical shocks and death or serious injury.

■

Avoiding 12-volt battery fires or explosions

Observe the following precautions to prevent accidentally igniting the flammable gas that
may be emitted from the 12-volt battery:
Do not smoke, use matches, cigarette lighters or allow open flame near the 12-volt
battery.

■

12-volt battery precautions

The 12-volt battery contains poisonous and corrosive acidic electrolyte, while related
parts contain lead and lead compounds. Observe the following precautions when han-
dling the 12-volt battery:

●

When working with the 12-volt battery, always wear safety glasses and take care not
to allow any battery fluids (acid) to come into contact with skin, clothing or the vehicle
body.

●

Do not lean over the 12-volt battery.

●

In the event that battery fluid comes into contact with the skin or eyes, immediately
wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention can be
received.

●

Always wash your hands after handling the 12-volt battery support, terminals, and
other battery-related parts.

●

Do not allow children near the 12-volt battery.

INFORMATION

■

If a 12-volt battery terminal has been disconnected

●

If a 12-volt battery terminal has been disconnected, the doors cannot be locked or
unlocked using the Smart access system with push-button start system or wireless
remote control, and the door opener switches will not operate.
Make sure to remove the electronic key (mechanical key) from the vehicle before
disconnecting a 12-volt battery terminal.
If the electronic key (mechanical key) is to be left in the vehicle, open a window so an
inside manual release handle can be operated.

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When tr

ouble arises

●

The doors may not be able to be unlocked using the Smart access system with
push-button start immediately after a 12-volt battery terminal is disconnected and
reconnected.
If the doors cannot be unlocked, use the wireless remote control or mechanical key to
lock and unlock the doors.

●

When a 12-volt battery terminal is disconnected, information recorded by various
computers will be cleared.

●

Some systems may require initialization.

9-3. If the hybrid system will not start

678

When the interior lights or headlights do not illuminate and the hybrid
system cannot be started

Cause

Remedy

The 12-volt battery may
be discharged.

Restarting the hybrid system using the jumper (or
booster) cables.
Contact your Lexus dealer if the problem cannot be
repaired, or if repair procedures are unknown.

One or both of the 12-volt
battery terminals may be
disconnected.

Check if a 12-volt battery terminal is disconnected.
Contact your Lexus dealer if the problem cannot be
repaired, or if repair procedures are unknown.

The steering lock system
may be malfunctioning.

Contact your Lexus dealer.

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When tr

ouble arises

If a tire is flat

Precautions for when you have a flat tire

Your vehicle is not equipped with a spare tire, but instead you can continue driving
the vehicle with run-flat tires even if any tire goes flat. In this case, slow down and
drive with extra caution.
Take your vehicle to the nearest Lexus dealer or authorized tire dealer as soon as
possible if any tire goes flat.
The vehicle can be driven for a maximum of 50 miles (80 km) at a speed below
50 mph (80 km/h) after the tire pressure warning light comes on.

A run-flat tire has a

mark on the side wall.

INFORMATION

■

In some conditions (such as at high temperatures)

You cannot continue driving for up to 50 miles (80 km).

NOTICE

■

When replacing the tires

When removing or fitting the wheels, tires or the tire pressure warning valve and
transmitter, contact your Lexus dealer as the tire pressure warning valve and transmitter
may be damaged if not handled correctly.

■

When driving over bumps

If a vehicle has a flat tire, the vehicle height will be lower than usual. Ensure that nothing
strikes the bottom of the vehicle.

■

To avoid damage to the tire pressure warning valves and transmitters

When a tire is repaired with liquid sealants, the tire pressure warning valve and transmit-
ter may not operate properly. If a liquid sealant is used, contact your Lexus dealer or
other qualified service shop as soon as possible. Make sure to replace the tire pressure
warning valve and transmitter when replacing the tire.

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If a door cannot be opened or locked

If a key has been lost

New genuine mechanical keys can be made by your Lexus dealer using another
mechanical 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

If the electronic key remains lost, the risk of vehicle theft increases significantly. Visit
your Lexus dealer immediately with all remaining electronic keys and the card key

that were provided with your vehicle.

* :

If equipped

9-5. If a door cannot be opened or locked

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When tr

ouble arises

When the doors/windows/moon roof cannot be operated using an elec-
tronic key

If communication between the electronic key and vehicle is interrupted or the
electronic key cannot be used because the battery is depleted, the smart access
system with push-button start and wireless remote control cannot be used.

The smart access system with push-button start may have been disabled by a
customize setting.
In this case, change the customize setting to enable the smart access system
with push-button start.

NOTICE

When taking the vehicle to your Lexus dealer due to a malfunction of the smart
access system with push-button start, make sure to bring all registered electronic keys
(including the card key).

The electronic key may have been set to battery saving mode.
battery saving mode has been set, cancel it.
The battery of the electronic key may be discharged.

●

Replace the battery.

●

Using the mechanical key.

The 12-volt battery may be discharged.
Restarting the hybrid system using the jumper (or booster) cables.

Replace the electronic key battery

Replace the battery with a new one if it is depleted.
The battery for the card key is available only at Lexus dealers. Your Lexus dealer
can replace the battery for you.
Prepare the following before replacing the battery:

●

Flathead screwdriver

●

Small flathead screwdriver

●

Lithium battery CR2032

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INFORMATION

■

Use a CR2032 lithium battery

Batteries can be purchased at your Lexus dealer, local electrical appliance shops or
camera stores.

●

Replace only with the same or equivalent type recommended by the manufacturer.

●

Dispose of used batteries according to the local laws.

■

If the electronic key battery is depleted

The following symptoms may occur:

●

The smart access system with push-button start and wireless remote control will not
function properly.

●

The operational range will be reduced.

Take out the mechanical key.

Remove the cover.

To prevent damage to the key, cover the tip of the
flathead screwdriver with a tape.

Remove the depleted battery.

Insert a new battery with the “+” terminal facing
up.

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When tr

ouble arises

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 battery 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 batteries 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 your Lexus dealer.

●

If you accidentally swallow a battery or put a battery into a part of your body, get
emergency medical attention immediately.

■

To prevent battery explosion or leakage of flammable liquid or gas

●

Replace the battery with a new battery 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 ex-
tremely high temperatures.

●

Do not burn, break or cut a battery.

NOTICE

■

When replacing the battery

Use a flathead 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 control.

●

Do not bend either of the battery terminals.

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Using the mechanical key

To take out the mechanical key, push the release
button and take the key out.
The mechanical key can only be inserted in one
direction, as the key only has a groove on one
side. If the key cannot be inserted in a lock cylin-
der, turn it over and attempt to insert it again.
After using the mechanical key, return it to its
original position and carry it with the electronic
key. If the electronic key battery is depleted, the
entry function is not operating properly, or the
vehicle 12-volt battery is discharged, you will
need the mechanical key.

NOTICE

Do not apply excess force when inserting the mechanical key into the card key. Doing so
may damage the card key.

INFORMATION

■

If the incorrect key is used

The key cylinder rotates freely to isolate inside mechanism.

■

Card key

●

If it is difficult to take out the mechanical key, push down the release button using a pen
tip, etc. If it is still difficult to pull it out, use a coin, etc.

●

To store the mechanical key in the card key, insert it while pressing the release button.

■

Alarm

If a door is unlocked using the mechanical key when the alarm system is set, a 10 second
pre-alarm sounds.

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When tr

ouble arises

Locking/unlocking the doors

Insert a plastic card, etc. into the gap in the
door handle and remove the cover.

To avoid damage, do not apply excessive force to
the cover.

Use the mechanical key in order to perform the following operations:

Unlocks all the doors

Locks all the doors

INFORMATION

■

Key linked functions

Opens the windows and the moon roof (turn
and hold)

Closes the windows and the moon roof (turn
and hold)

WARNING

Operate the power window or moon roof after checking to make sure that there is
no possibility of any passenger having any of their body parts caught in the window or
moon roof. 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 or moon roof.

Restarting the hybrid system when the 12-volt battery is discharged

If you have a set of jumper (or booster) cables and a second vehicle with a 12-volt
battery, you can jump start your vehicle by following the steps below.

*1 :

These settings must be customized at your Lexus dealer.

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