Lexus LC500 (2022 year). Manual in english — page 23

390

7-2. Steps to take in an emergency

One of the following may be the cause
of the problem:



The 12-volt battery may be dis-
charged. (



P.395)



The 12-volt battery terminal con-
nections may be loose or corroded.
(



P.333)

One of the following may be the cause
of the problem:



The 12-volt battery may be dis-
charged. (



P.395)



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



P.333)

Contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable
repairer if the problem cannot be repaired,
or if repair procedures are unknown.

When the hybrid system does not start,
the following steps can be used as an
interim measure to start the hybrid sys-
tem if the power switch is functioning
normally. Do not use this starting pro-
cedure except in cases of emergency.

1

Press the parking brake switch to
check that the parking brake is set.
(



P.183)

Parking brake indicator will come on.

2

Turn the power switch to ACCES-
SORY mode.

3

Press and hold the power switch for
about 15 seconds while depressing
the brake pedal firmly.

Even if the hybrid system can be
started using the above steps, the sys-
tem may be malfunctioning. Have the
vehicle inspected by any authorized
Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

The interior lights and head-
lights are dim, or the horn does
not sound or sounds at a low vol-
ume.

The interior lights and head-
lights do not turn on, or the horn
does not sound.

Starting the hybrid system in an
emergency

391

7

7-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

1

Remove the cover in the center of
the rear seat. (



P.395)

2

Pull the tab.

If you lose your keys

New genuine mechanical keys can
be made by any authorized Lexus
retailer or Lexus authorized
repairer, or any reliable repairer
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

Q

When an electronic key is lost

If the electronic key remains lost, the risk

of vehicle theft increases significantly.

Visit any authorized Lexus retailer or

Lexus authorized repairer, or any reli-

able repairer immediately with all

remaining electronic keys and the card

key that were provided with your vehicle.

If the fuel filler door cannot
be opened

If the fuel filler door opener switch
cannot be operated, the following
procedure can be used to open the
fuel filler door.

Opening the fuel filler door

WARNING

Q

After opening the fuel filler door

Make sure to put back the cover to the

center of the rear seat. Failure to do so

may cause an accident.

NOTICE

Q

After opening the fuel filler door

O

Secure the tab in its original position.

392

7-2. Steps to take in an emergency

Q

When the electronic key does not work

properly

O

Make sure that the smart entry & start

system has not been deactivated using

the Remote Touch or at any authorized

Lexus retailer or Lexus authorized

repairer, or any reliable repairer. If it is

off, turn the function on.

O

Check if battery-saving mode is set. If it is

set, cancel the function. (



P.127)

Use the mechanical key (



P.117) in

NOTICE

O

Install the tab so that it does not cover
the clip installation position

. Fail-

ure to do so may cause damage to the

clip and make it impossible to install

the cover.

A

If the electronic key does not
operate properly

If communication between the
electronic key and vehicle is inter-
rupted (



P.127) 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 and trunk can be
opened and the engine <hybrid sys-
tem> can be started by following
the procedure below.

NOTICE

Q

In case of a smart entry & start system

malfunction or other key-related

problems

Take your vehicle with all the electronic

keys (including the card key) provided

with your vehicle, to any authorized

Lexus retailer or Lexus authorized

repairer, or any reliable repairer as soon

as possible.

Locking and unlocking the
doors, opening the trunk and
using the key linked functions

393

7

7-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

order to perform the following opera-
tions:

Q

Locking and unlocking the door

1

Push in the depression on the front
edge of the driver’s door handle.

2

Insert the mechanical key while
pulling on the driver’s door handle.

3

Turn the key in order to perform
the following operations.

Locks both side doors

Closes the windows (turn and
hold)

*

Unlocks both side doors

Opens the windows (turn and
hold)

*

*

: These settings must be customized at

any authorized Lexus retailer or Lexus
authorized repairer, or any reliable
repairer.

Q

Opening the trunk

Unlock the doors, and press the trunk
opener switch.

1

Depress the brake pedal.

2

Touch the Lexus emblem side of
the electronic key to the engine
switch <power switch>.

When the electronic key is detected, a

buzzer sounds and the engine switch

<power switch> will turn to IGNITION ON

mode <ON mode>.
When the smart entry & start system is

deactivated in customization setting, the

engine switch <power switch> will turn to

A
B

C
D

WARNING

Q

When using the mechanical key and

operating the power windows

Operate the power window after check-

ing to make sure that there is no possibil-

ity 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 engine <hybrid sys-
tem>

394

7-2. Steps to take in an emergency

ACCESSORY mode.

3

Firmly depress the brake pedal and

check that

is shown on the

multi-information display.

4

Press the engine switch <power
switch>.

In the event that the engine <hybrid
system> still cannot be started, contact
any authorized Lexus retailer or Lexus
authorized repairer, or any reliable
repairer.

Q

Stopping the engine <hybrid system>

Set the parking brake, shift the shift position

to P and press the engine switch <power

switch> as you normally do when stopping

the engine <hybrid system>.

Q

Electronic key battery

As the above procedure is a temporary

measure, it is recommended that the elec-

tronic key battery be replaced immediately

when the battery is depleted. (



P.351)

Q

Alarm (if equipped)

Using the mechanical key to lock the doors

will not set the alarm system.

If a door is unlocked using the mechanical

key when the alarm system is set, the alarm

may be triggered.

Q

Changing engine switch <power switch>

modes

Release the brake pedal and press the

engine switch <power switch> in step

3

above.

The engine <hybrid system> does not start

and modes will be changed each time the

switch is pressed. (



P.159, 164)

395

7

7-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

Use the mechanical key (



P.117) in

order to perform the following opera-
tions:

Q

Locking and unlocking the doors



P.392

Q

Opening the trunk

1

Slide the rear passengers’ seat
belts towards the outside.

2

Insert your fingers at the positions
marked

and pull towards you to

remove the cover in the center of
the rear seat.

3

Insert the mechanical key into the
cylinder and turn it clockwise to
open.

If the 12-volt battery is dis-
charged

The following procedures may be
used to start the engine <hybrid sys-
tem> or opening the doors, trunk or
glove box if the 12-volt battery is
discharged.
You can also call any authorized
Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

Locking and unlocking the doors
and opening the trunk

A

WARNING

Q

After unlocking the trunk

Make sure to put back the cover to the

center of the rear seat. Failure to do so

may cause an accident.

396

7-2. Steps to take in an emergency

The glove box can be opened by per-
forming the following operations after
unlocking the doors.

If the glove box is locked, unlock it with the
mechanical key. (



P.294)

1

Remove the cover using a flathead
screwdriver.

To prevent damage to the cover, cover the

tip of the screwdriver with a rag.

2

Push the flathead screwdriver into
the part shown in the illustration to
open the glove box.

Q

After opening the glove box

The glove box can be opened normally by

closing the glove box after restarting the

engine <hybrid system>.

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 using the following procedure.

1

Confirm that the electronic key
(including the card key) is being
carried.

When connecting the jumper (or booster)

cables, depending on the situation, the

alarm may activate and doors locked.

(



P.80)

NOTICE

Q

When installing the cover in the cen-

ter of the rear seat

Make sure that the seat belts are not

caught in the cover. Failure to do so may

cause damage to the cover installation

clip and make it impossible to install the

cover.

Opening the glove box

Restarting the engine <hybrid
system>

397

7

7-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

2

Open the hood (



P.323) and

open the fuse box cover.

Push the tab in and lift the lid off.



LC500 (Left-hand drive vehicles)



LC500 (Right-hand drive vehicles)



LC500h (Left-hand drive vehicles)



LC500h (Right-hand drive vehi-
cles)

3

Open the exclusive jump starting
terminal cover.



LC500 (Left-hand drive vehicles)



LC500 (Right-hand drive vehicles)

398

7-2. Steps to take in an emergency



LC500h (Left-hand drive vehicles)



LC500h (Right-hand drive vehi-
cles)

4

Remove the engine cover.



LC500



LC500h

5

Connect a positive jumper cable clamp to

on your vehicle and connect the

clamp on the other end of the positive cable to

on the second vehicle.

Then, connect a negative cable clamp to

on the second vehicle and con-

nect the clamp at the other end of the negative cable to

.

A

B

C

D

399

7

7-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises



LC500 (Left-hand drive vehicles)



LC500 (Right-hand drive vehicles)

400

7-2. Steps to take in an emergency



LC500h (Left-hand drive vehicles)



LC500h (Right-hand drive vehicles)

Exclusive jump starting terminal (your vehicle)

Positive (+) battery terminal (second vehicle)

Negative (-) battery terminal (second vehicle)

Solid, stationary, unpainted metallic point away from the exclusive jump starting
terminal and any moving parts as shown in the illustration

6

Start the engine of the second vehi-
cle. Increase the engine speed
slightly and maintain at that level for
approximately 5 minutes to

recharge the 12-volt battery of your
vehicle.

A
B
C
D

401

7

7-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

7

Open and close any of the door of
your vehicle with the engine switch
<power switch> off.

8

Maintain the engine speed of the
second vehicle and start the engine
<hybrid system> of your vehicle by
turning the engine switch <power
switch> to IGNITION ON mode
<ON mode>.

9

Once the vehicle’s engine <hybrid
system> has started, remove the
jumper cables in the exact reverse
order from which they were con-
nected.

10

Close the exclusive jump starting
terminal cover, and reinstall the
fuse box cover and engine cover to
its original position.

Once the engine <hybrid system> starts,

have the vehicle inspected at any autho-

rized Lexus retailer or Lexus authorized

repairer, or any reliable repairer as soon as

possible.

Q

Starting the engine <hybrid system>

when the 12-volt battery is discharged

The engine <hybrid system> cannot be

started by push-starting.

Q

To prevent 12-volt battery discharge

O

Turn off the headlights and the audio sys-

tem while the engine <hybrid system> is

stopped.

O

Turn off any unnecessary electrical com-

ponents when the vehicle is running at a

low speed for an extended period, such

as in heavy traffic.

Q

When the 12-volt battery is removed or

discharged

O

Information stored in the ECU is cleared.

When the 12-volt battery is depleted,

have the vehicle inspected at any autho-

rized Lexus retailer or Lexus authorized

repairer.

O

Some systems may require initialization.

(



P.437)

Q

When removing the 12-volt battery ter-

minals

When the 12-volt battery terminals are

removed, the information stored in the

ECU is cleared. Before removing the 12-

volt battery terminals, contact any autho-

rized Lexus retailer or Lexus authorized

repairer.

Q

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 dis-

charge and the draining effects of certain

electrical appliances. If the vehicle is left for

a long time, the 12-volt battery may dis-

charge, and the engine <hybrid system>

may be unable to start. (The 12-volt battery

recharges automatically during driving.)

Q

When recharging or replacing the 12-

volt battery

O

In some cases, it may not be possible to

unlock the doors using the smart entry &

start system when the 12-volt battery is

discharged. Use the wireless remote

control or the mechanical key to lock or

unlock the doors.

O

The engine <hybrid system> may not start

on the first attempt after the 12-volt bat-

tery has recharged but will start normally

after the second attempt. This is not a

malfunction.

O

The engine switch <power switch> mode

is memorized by the vehicle. When the

12-volt battery is reconnected, the sys-

tem will return to the mode it was in

before the 12-volt battery was dis-

charged. Before disconnecting the 12-

volt battery, turn the engine switch

<power switch> off.

If you are unsure what mode the engine

switch <power switch> was in before the

12-volt battery discharged, be especially

careful when reconnecting the 12-volt

battery.

O

If the 12-volt battery discharges, it may

402

7-2. Steps to take in an emergency

not be possible to shift the shift position to

other positions.

In this case, the vehicle cannot be towed

without lifting both rear wheels because

the rear wheels will be locked. (



P.366)

Q

When replacing the 12-volt battery

O

Use a Central Degassing type 12-volt

battery (European Regulations).

O

LC500: Use a 12-volt battery that the

case size is same as the previous one

(LN4), 20 hour rate capacity (20HR) is

equivalent (80Ah) or greater, and per-

formance rating (CCA) is equivalent

(685A) or greater.

LC500h: Use a 12-volt battery that the

case size is same as the previous one

(LN3), 20 hour rate capacity (20HR) is

equivalent (70Ah) or greater, and per-

formance rating (CCA) is equivalent

(600A) or greater.

• If the sizes differ, the 12-volt battery can-

not be properly secured.

• If the 20 hour rate capacity is low, even if

the time period where the vehicle is not

used is a short time, the 12-volt battery

may discharge and engine <hybrid sys-

tem> may not be able to start.

O

Use a 12-volt battery with a handle. If a

12-volt battery without a handle is used,

removal is more difficult.

O

After exchanging, firmly attach the fol-

lowing items to the exhaust hole of the

12-volt battery.

• Use the exhaust hose that was attached

to the 12-volt battery before exchanging.

• Use the exhaust hole plug included with

the 12-volt battery exchanged or the one

installed on the battery prior to the

exchange. (Depending on the 12-volt

battery to be exchanged, the exhaust

hole may be plugged.)

Exhaust hole plug

Exhaust hole

Exhaust hose

For details, consult any authorized Lexus
retailer or Lexus authorized repairer.

WARNING

Q

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 addi-

tion to electrical shocks and death or

serious injury.

Q

Avoiding 12-volt battery fires or

explosions

Observe the following precautions to

prevent accidentally igniting the flamma-

ble gas that may be emitted from the 12-

volt battery:

O

Make sure each jumper cable is con-

nected to the correct terminal and that

it is not unintentionally in contact with

any other than the intended terminal.

A

B

C

403

7

7-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

WARNING

O

Do not allow the other end of the

jumper cable connected to the “+” ter-

minal to come into contact with any

other parts or metal surfaces in the

area, such as brackets or unpainted

metal.

O

Do not allow the + and - clamps of the

jumper cables to come into contact

with each other.

O

Do not smoke, use matches, cigarette

lighters or allow open flame near the

12-volt battery.

O

If the 12-volt battery fluid level is

excessively low (



P.333), do not use

the 12-volt battery.

Q

12-volt battery precautions

The 12-volt battery contains poisonous

and corrosive acidic electrolyte, while

related parts contain lead and lead com-

pounds. Observe the following precau-

tions when handling the 12-volt battery:

O

When working with the 12-volt battery,

always wear safety glasses and take

care not to allow any 12-volt battery

fluids (acid) to come into contact with

skin, clothing or the vehicle body.

O

Do not lean over the 12-volt battery.

O

In the event that 12-volt 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.

O

Always wash your hands after han-

dling the 12-volt battery support, ter-

minals, and other battery-related

parts.

O

Do not allow children near the 12-volt

battery.

Q

After recharging the 12-volt battery

Have the 12-volt battery inspected at any

authorized Lexus retailer or Lexus

authorized repairer, or any reliable

repairer as soon as possible. If the 12-volt

battery is deteriorating, continued use

may cause the 12-volt battery to emit a

malodorous gas, which may be detri-

mental to the health of passengers.

Q

When exchanging the 12-volt battery

After exchanging, securely attach the

exhaust hose and exhaust hole plug to

the exhaust hole of the exchanged 12-

volt battery. If not properly installed,

gases (hydrogen) may leak into the vehi-

cle interior, and there is the possible dan-

ger of the gas igniting and exploding.

NOTICE

Q

When handling jumper cables

When connecting the jumper cables,

ensure that they do not become entan-

gled in the cooling fan or engine drive

belt.

Q

To prevent damaging the vehicle

The exclusive jump starting terminal is to

be used when charging the 12-volt bat-

tery from another vehicle in an emer-

gency. It cannot be used to jump start

another vehicle.

404

7-2. Steps to take in an emergency

1

Stop the vehicle in a safe place and
turn off the air conditioning system,
and then stop the engine.

2

If you see steam:
Carefully lift the hood after the
steam subsides.
If you do not see steam:
Carefully lift the hood.

3

After the engine has cooled down
sufficiently, inspect the hoses and

radiator core (radiator) for any
leaks.

Radiator

Cooling fan

If a large amount of coolant leaks, immedi-
ately contact any authorized Lexus retailer
or Lexus authorized repairer, or any reli-
able repairer.

4

The coolant level is satisfactory if it
is between the “F” and “L” lines on
the reservoir.

Reservoir

“F” line

“L” line

Coolant inlet cap

5

Add coolant if necessary.

Water can be used in an emergency if

If your vehicle overheats
(LC500)

The following may indicate that
your vehicle is overheating.



The engine coolant temperature
gauge (



P.92) is in the red zone

or a loss of engine power is expe-
rienced. (For example, the vehicle
speed does not increase.)



“Engine Coolant Temp High Stop
in a Safe Place See Owner’s
Manual” is shown on the multi-
information display.



Steam comes out from under the
hood.

Correction procedures

A
B

A
B
C
D

405

7

7-2. Steps to take in an emergency

Wh
en

troubl
e ar
ises

coolant is unavailable.

6

Start the engine and turn the air
conditioning system on to check
that the radiator cooling fan oper-
ates and to check for coolant leaks
from the radiator or hoses.

The fan operates when the air conditioning

system is turned on immediately after a

cold start. Confirm that the fan is operating

by checking the fan sound and air flow. If it

is difficult to check these, turn the air con-

ditioning system on and off repeatedly.

(The fan may not operate in freezing tem-

peratures.)

7

If the fan is not operating:
Stop the engine immediately and
contact any authorized Lexus
retailer or Lexus authorized
repairer, or any reliable repairer.
If the fan is operating:
Have the vehicle inspected at the
nearest authorized Lexus retailer
or Lexus authorized repairer, or
any reliable repairer.

Q

When adding coolant

Add coolant in accordance with the follow-

ing procedure.

1

Remove the service cover.

2

Remove the engine cover.

3

Remove the caps

and

.

4

Add coolant through the inlet of the cap

up to the “F” line

, and then

replace the cap

.

5

Add coolant through the inlet of the cap

until it is full, and then replace the

cap .

A

B

A

C

A

B

B