Lexus LS (2022 year). Manual in english - page 27

443

7

7-2. Steps to take in an emergency

When trouble

 ar

ises

■

Warning messages

The warning messages explained below 

may differ from the actual messages 

according to operation conditions and vehi-

cle specifications.

■

Warning buzzer

In some cases, the buzzer may not be heard 

due to being in a noisy location or audio 

sound.

■

If “Engine Oil Level Low Add or 

Replace” is displayed

The engine oil level is low. Check the level 

of the engine oil, and add if necessary.
This message may appear if the vehicle is 

stopped on a slope. Move the vehicle to a 

level surface and check to see if the mes-

sage disappears.

NOTICE

■

To ensure the tire pressure warning 

system operates properly

Do not install tires with different specifi-

cations or makers, as the tire pressure 

warning system may not operate prop-

erly.

If a warning message is dis-
played

The multi-information display 
shows warnings for system malfunc-
tions and incorrectly performed 
operations, and messages that indi-
cate a need for maintenance. 
When a message is displayed, per-
form the appropriate corrective 
action for the message.
If a warning message is displayed 
again after the appropriate actions 
have been performed, contact any 
authorized Lexus retailer or Lexus 
authorized repairer, or any reliable 
repairer.
Additionally, if a warning light 
comes on or flashes at the same 
time that a warning message is dis-
played, take the appropriate cor-
rective action for the warning light. 
(



P.435)

444

7-2. Steps to take in an emergency

■

If “Engine Stopped Steering Power 

Low” is displayed

This message is displayed if the engine is 

stopped while driving.
When steering wheel operations are heav-

ier than usual, grip the steering wheel firmly 

and operate it using more force than usual.

■

If “Auto Power Off to Conserve Battery” 

is displayed

Power was turned off due to the automatic 

power off function. Next time when starting 

the engine, increase the engine speed 

slightly and maintain that level for approxi-

mately 5 minutes to recharge the battery.

■

If “Headlight System Malfunction Visit 

Your Dealer” is displayed

The following systems may be malfunction-

ing. Have the vehicle inspected by any 

authorized Lexus retailer or Lexus author-

ized repairer, or any reliable repairer imme-

diately.

●

The LED headlight system

●

The automatic headlight leveling system

●

AHS (Adaptive High-beam System) (if 

equipped)

●

AHB (Automatic High Beam) (if 

equipped)

●

Multi Weather Lights

■

If “Radar Cruise Control Unavailable 

See Owner's Manual” is displayed (on 

some models)

The dynamic radar cruise control with 

full-speed range system is suspended tem-

porarily or until the problem shown in the 

message is resolved. (causes and coping 

methods: 



P.206, 211)

■

If “Radar Cruise Control Unavailable” is 

displayed (on some models)

The dynamic radar cruise control with 

full-speed range system cannot be used 

temporarily. Use the system when it 

becomes available again.

■

If a message that indicates the malfunc-

tion of front camera is displayed

The following systems may be suspended 

until the problem shown in the message is 

resolved. (



P.206, 211, 440)

●

PCS (Pre-Collision system) (if equipped)

●

LTA (Lane Tracing Assist) (if equipped)

●

AHS (Adaptive High-beam System) (if 

equipped)

●

AHB (Automatic High Beam) (if 

equipped)

●

RSA (Road Sign Assist) (if equipped)

●

Dynamic radar cruise control with 

full-speed range (if equipped)

■

If a message that indicates the malfunc-

tion of radar sensor is displayed

The following systems may be suspended 

until the problem shown in the message is 

resolved. (



P.206, 211, 440)

●

PCS (Pre-Collision system) (if equipped)

●

LTA (Lane Tracing Assist) (if equipped)

●

Dynamic radar cruise control with 

full-speed range (if equipped)

■

If “Oil Maintenance Required Soon” is 

displayed

Indicates that the engine oil should be 

scheduled to be changed.
Check the engine oil and change it if neces-

sary. After changing the engine oil, make 

sure to reset the message. (



P.397)

■

If “Oil Maintenance Required” is dis-

played

Indicates that the engine oil should be 

changed.
Check and change the engine oil, and oil fil-

ter by any authorized Lexus retailer or 

Lexus authorized repairer, or any reliable 

repairer. After changing the engine oil, 

make sure to reset the message. (



P.397)

■

If “Shift System Malfunction Shifting 

Unavailable Drive to a Safe Place and 

Stop” or “Shift System Malfunction 

Driving Unavailable” is displayed

There is a malfunction in the shift control 

system. Have the vehicle inspected by any 

authorized Lexus retailer or Lexus author-

ized repairer, or any reliable repairer imme-

diately.

445

7

7-2. Steps to take in an emergency

When trouble

 ar

ises

■

If a message that indicates the need for 

the shift lever operation is displayed

To prevent the shift lever from being oper-

ated incorrectly or the vehicle from moving 

unexpectedly, a message that requires shift-

ing the shift position may be displayed on 

the multi-information display. In that case, 

follow the instruction of the message and 

shift the shift position.

■

If a message that indicates the need for 

visiting your Lexus dealer is displayed

The system or part shown on the 

multi-information display is malfunctioning. 

Have the vehicle inspected by any author-

ized Lexus retailer or Lexus authorized 

repairer, or any reliable repairer immedi-

ately.

■

If a message that indicates the need for 

referring to Owner’s Manual is dis-

played

●

If any of the following messages are 

shown on the multi-information display, 

follow the instructions.

• “Engine Coolant Temp High” (



P.458)

• “Battery  Low”  (



P.452)

• “Transmission Fluid Temp High” (



P.172)

●

If any of the following messages are 

shown on the multi-information display, it 

may indicate a malfunction. Have the 

vehicle inspected by any authorized 

Lexus retailer or Lexus authorized 

repairer, or any reliable repairer immedi-

ately.

• “Entry & Start System Malfunction”

• “Shift System Malfunction Apply Parking 

Brake Securely When Parking See 

Owner's Manual”

• “P Switch Malfunction Apply Parking 

Brake Securely When Parking See 

Owner's Manual”

• “Shift System Unavailable Apply Parking 

Brake Securely When Parking See 

Owner's Manual”

• “Shift System Malfunction See Owner's 

Manual”

• “Shift System Malfunction Stop in a Safe 

Place See Owner's Manual”

• “Battery Low Shifting Unavailable See 

Owner's Manual”

●

If any of the following messages are 

shown on the multi-information display, it 

may indicate a malfunction. Immediately 

stop the vehicle and contact any author-

ized Lexus retailer or Lexus authorized 

repairer, or any reliable repairer.

• “Braking Power Low”

• “Charging System Malfunction”

• “Oil Pressure Low”

NOTICE

■

If “High Power Consumption Partial 

Limit On AC/Heater Operation” is 

displayed frequently

There is a possible malfunction relating 

to the charging system or the battery 

may be deteriorating. Have the vehicle 

inspected by any authorized Lexus 

retailer or Lexus authorized repairer, or 

any reliable repairer.

446

7-2. Steps to take in an emergency

Take your vehicle to the nearest 
authorized Lexus retailer or Lexus 
authorized repairer, or any reliable 
repairer, or authorized tire dealer as 
soon as possible if any tire goes flat.



For XXX/XXRXX size tires

The vehicle can be driven for a maximum 
of 80 km (50 miles) at a speed below 80 
km/h (50 mph) after the tire pressure 
warning light comes on. (



P.439)



For XXX/XXRFXX size tires

The vehicle can be driven for a maximum 
of 160 km (100 miles) at a speed below 80 
km/h (50 mph) after the tire pressure 
warning light comes on. (



P.439)

A run-flat tire has a 

 or 

 mark 

on the side wall.

■

In some conditions (such as at high tem-

peratures)

For XXX/XXRXX size tires: You cannot 

continue driving for up to 50 km (80 

miles).
For XXX/XXRFXX size tires: You cannot 

continue driving for up to 100 km (160 

miles).

■

For the detailed information on run-flat 

tires

See the tire warranty booklet.

If you have a flat tire

Your vehicle is not equipped with a 
spare tire, but instead you can con-
tinue driving the vehicle with 
run-flat tires even if any tire goes 
flat.

In this case, slow down and drive 
with extra caution.

Run-flat tires

NOTICE

■

When replacing the tires

When removing or fitting the wheels, 

tires or the tire pressure warning valve 

and transmitter, contact any authorized 

Lexus retailer or Lexus authorized 

repairer, or any reliable repairer as the 

tire pressure warning valve and transmit-

ter may be damaged if not handled cor-

rectly.

■

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 seal-

ants, the tire pressure warning valve and 

transmitter may not operate properly. If a 

liquid sealant is used, contact any author-

ized Lexus retailer or Lexus authorized 

repairer, or any reliable repairer or other 

qualified service shop as soon as possi-

ble. Make sure to replace the tire pres-

sure warning valve and transmitter when 

replacing the tire. (



P.406)

447

7

7-2. Steps to take in an emergency

When trouble

 ar

ises

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



There may not be sufficient fuel in 
the vehicle’s tank.
Refuel the vehicle.



The engine may be flooded.
Try to restart the engine again fol-
lowing correct starting procedures. 
(



P.169)



There may be a malfunction in the 
engine immobilizer system. 
(



P.63)



There may be a malfunction in the 
shift control system.

*

 (



P.172, 444)

*

: It may not be possible to shift the shift 

position from P.

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



The battery may be discharged. 
(



P.452)



The battery terminal connections 
may be loose or corroded. 
(



P.401)

The engine starting system may be 
malfunctioning due to an electrical 
problem such as electronic key battery 
depletion or a blown fuse. However, an 
interim measure is available to start the 
engine. (



P.447)

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



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



P.401)



The battery may be discharged. 
(



P.452)



There may be a malfunction in the 
steering lock system.

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 engine does not start, the 

If the engine will not start

If the engine will not start even 
though correct starting procedures 
are being followed (



P.169), con-

sider each of the following points:

The engine will not start even 
though the starter motor oper-
ates normally.

The starter motor turns over 
slowly, the interior lights and 
headlights are dim, or the horn 
does not sound or sounds at a low 
volume.

The starter motor does not turn 
over

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

Starting the engine in an emer-
gency

448

7-2. Steps to take in an emergency

following steps can be used as an 
interim measure to start the engine if 
the engine switch is functioning nor-
mally.
Do not use this starting procedure 
except in cases of emergency.

1

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



P.180)

Parking brake indicator will come on.

2

Turn the engine switch to ACCES-
SORY mode.

3

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

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

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

■

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 reliable 

repairer immediately with all remaining 

electronic keys and the card key (if 

equipped) that were provided with your 

vehicle.

449

7

7-2. Steps to take in an emergency

When trouble

 ar

ises

Remove the cover inside the trunk and 
pull the lever.

■

When the electronic key does not work 

properly

●

Make sure that the smart entry & start 

system has not been disabled using the 

Remote Touch or at any authorized Lexus 

retailer or Lexus authorized repairer, or 

any reliable repairer. If it has been disa-

bled, re-enable it.

●

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

set, cancel the function. (



P.116)

■

Unlocking the door

Use the mechanical key (



P.100) in 

If the fuel filler door cannot 
be opened

If the fuel filler door opener switch 
cannot be operated, contact any 
authorized Lexus retailer or Lexus 
authorized repairer, or any reliable 
repairer to service the vehicle. In 
case where refueling is urgently 
necessary, the following procedure 
can be used to open the fuel filler 
door.

Opening the fuel filler door

If the electronic key does not 
operate properly

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



P.116) 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 can be 
started by following the procedure 
below.

NOTICE

■

In case of a smart entry & start system 

malfunction or other key-related 

problems

Take your vehicle with all the electronic 

keys provided with your vehicle, to any 

authorized Lexus retailer or Lexus 

authorized repairer, or any reliable 

repairer.

Locking and unlocking the 
doors, unlocking the trunk

450

7-2. Steps to take in an emergency

order to perform the following opera-
tions:

1

Pull the driver’s door handle and 
insert the mechanical key.

2

Unlock the door.

3

Remove the key, return the handle, 
and then pull the handle again.

■

Locking the door

1

With the door open, push down the 
inside lock button.



For the front doors

2

Close the door while pulling the 
door handle.



For the rear doors

2

Close the door.

■

Trunk

Turn the mechanical key clockwise to 
open.

■

Key linked functions

1

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

2

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

These settings must be customized at any 

authorized Lexus retailer or Lexus author-

ized repairer, or any reliable repairer.

451

7

7-2. Steps to take in an emergency

When trouble

 ar

ises

1

Depress the brake pedal.

2

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

When the electronic key is detected, a 

buzzer sounds and the engine switch will 

turn to IGNITION ON mode.
When the smart entry & start system is 

deactivated in customization setting, the 

engine switch will turn to ACCESSORY 

mode.

3

Firmly depress the brake pedal and 
check that 

 is shown on the 

multi-information display.

4

Press the engine switch.

In the event that the engine still cannot 
be started, contact any authorized 

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

■

Stopping the engine

Set the parking brake, shift the shift position 

to P and press the engine switch as you nor-

mally do when stopping the engine.

■

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.419)

■

Alarm

Using the mechanical key to lock the doors 

or trunk will not set the alarm system.

If a door or trunk is unlocked using the 

mechanical key when the alarm system is 

set, the alarm may be triggered. (



P.65)

■

Changing engine switch modes

Release the brake pedal and press the 

engine switch in step 

3

 above. The engine 

does not start and modes will be changed 

each time the switch is pressed. (



P.171)

WARNING

■

When using the mechanical key and 

operating the power windows or 

moon roof

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.

Starting the engine

452

7-2. Steps to take in an emergency

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.



Method connecting jumper (or 
booster) cables to the battery

1

Confirm that the electronic key is 
being carried.

When connecting the jumper (or booster) 

cables, depending on the situation, the 

alarm may activate and doors locked. 

(



P.66)

2

Open the trunk lid and remove the 
luggage mat. (



P.367)

In the event that the trunk opener cannot 

be used, use the mechanical key to open 

the trunk. (



P.449)

3

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, 

If the vehicle battery is dis-
charged

The following procedures may be 
used to start the engine if the vehi-
cle’s battery is discharged.
You can also call any authorized 
Lexus retailer or Lexus authorized 
repairer, or any reliable repairer.

Restarting the engine

A

B

453

7

7-2. Steps to take in an emergency

When trouble

 ar

ises

connect a negative cable clamp to   on the second vehicle and connect the 
clamp at the other end of the negative cable to  .

Positive (+) battery terminal (your vehicle)
Positive (+) battery terminal (second vehicle)
Negative (-) battery terminal (second vehicle)
Negative (-) battery terminal (your vehicle)

4

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 battery of your vehi-
cle.

5

Open and close any of the doors of 
your vehicle with the engine switch 
off.

6

Maintain the engine speed of the 
second vehicle and start the engine 
of your vehicle by turning the 
engine switch to IGNITION ON 
mode.

7

Once the vehicle’s engine has 
started, remove the jumper cables 
in the exact reverse order from 
which they were connected.

8

Press the Stop & Start cancel 
switch to disable the Stop & Start 
system. (



P.285)



Method connecting jumper (or 
booster) cables to the exclusive 
jump starting terminal

1

Confirm that the electronic key is 
being carried.

When connecting the jumper (or booster) 

cables, depending on the situation, the 

alarm may activate and doors locked. 

(



P.66)

2

Open the hood. Remove the ser-
vice cover. (



P.389, 395)

3

Open the fuse box cover.

C

D

A
B
C
D

454

7-2. Steps to take in an emergency

Push the tab in and lift the lid off.

4

Open the exclusive jump starting 
terminal cover.

5

Remove the engine cover. 
(



P.394)

6

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 connect the 
clamp at the other end of the negative cable to  .



LS500



LS350

A

B

C

D

455

7

7-2. Steps to take in an emergency

When trouble

 ar

ises

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

7

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 battery of your vehi-
cle.

8

Open and close any of the doors of 
your vehicle with the engine switch 
off.

9

Maintain the engine speed of the 
second vehicle and start the engine 
of your vehicle by turning the 
engine switch to IGNITION ON 
mode.

10

Once the vehicle’s engine has 
started, remove the jumper cables 
in the exact reverse order from 
which they were connected.

11

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

12

Install the service cover. (



P.395)

13

Install the engine cover. (



P.395)

14

Press the Stop & Start cancel 
switch to disable the Stop & Start 
system. (



P.285)

Once the engine starts, have the vehi-
cle inspected at any authorized Lexus 
retailer or Lexus authorized repairer, 
or any reliable repairer as soon as pos-
sible.

■

Starting the engine when the battery is 

discharged

The engine cannot be started by push-start-

ing.

■

To prevent battery discharge

●

Turn off the headlights and the audio sys-

A
B
C
D

456

7-2. Steps to take in an emergency

tem while the engine is off. (Except when 

the engine is stopped by the Stop & Start 

system.)

●

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.

■

When the battery is removed or dis-

charged

●

Information stored in the ECU is cleared. 

When the battery is depleted, have the 

vehicle inspected at any authorized 

Lexus retailer or Lexus authorized 

repairer, or any reliable repairer.

●

Some systems may require initialization. 

(



P.492)

■

When removing the battery terminals

When the battery terminals are removed, 

the information stored in the ECU is 

cleared. Before removing the battery termi-

nals, contact any authorized Lexus retailer 

or Lexus authorized repairer, or any reliable 

repairer as soon as possible.

■

Charging the battery

The electricity stored in the battery will dis-

charge gradually even when the vehicle is 

not in use, due to natural discharge and the 

draining effects of certain electrical appli-

ances. If the vehicle is left for a long time, 

the battery may discharge, and the engine 

may be unable to start. (The battery 

recharges automatically during driving.)

■

After jump starting the vehicle

Be sure to disable the Stop & Start system 

so that the battery can be charged. 

(



P.285)

■

When recharging or replacing the bat-

tery

●

In some cases, it may not be possible to 

unlock the doors using the smart entry & 

start system when the battery is dis-

charged. Use the wireless remote control 

or the mechanical key to lock or unlock 

the doors.

●

The engine may not start on the first 

attempt after the battery has recharged 

but will start normally after the second 

attempt. This is not a malfunction.

●

The engine switch mode is memorized by 

the vehicle. When the battery is recon-

nected, the system will return to the 

mode it was in before the battery was dis-

charged. Before disconnecting the bat-

tery, turn the engine switch off.

If you are unsure what mode the engine 

switch was in before the battery dis-

charged, be especially careful when 

reconnecting the battery.

●

For a while after the battery terminals 

have been disconnected and recon-

nected, for a while after the battery has 

been replaced, the Stop & Start system 

may not automatically stop the engine for 

approximately 5 to 60 minutes.

●

If the battery discharges, it may not be 

possible to shift the shift position to other 

positions. In this case, the vehicle cannnot 

be towed without lifting both rear wheels 

because the rear wheels will be locked.

■

When replacing the battery

●

Use a Central Degassing type battery 

(European Regulations).

●

Use a genuine battery specifically 

designed for use with the Stop & Start 

system or a battery with equivalent speci-

fications to a genuine battery. If an unsup-

ported battery is used, Stop & Start 

system functions may be restricted to 

protect the battery.

Also, battery performance may decrease 

and the engine may not be able to restart. 

Contact any authorized Lexus retailer or 

Lexus authorized repairer, or any reliable 

repairer for details.

●

Use a battery with the same case size as 

the previous battery and an equivalent 

20 hour rate capacity (20HR) or greater.

• If the sizes differ, the battery cannot 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 battery may dis-

charge and the engine may not be able to 

start.

●

Use a battery with a handle. If a battery 

without a handle is used, removal is more 

457

7

7-2. Steps to take in an emergency

When trouble

 ar

ises

difficult.

●

After replacing, firmly attach the follow-

ing items to the exhaust hole of the bat-

tery.

• Use the exhaust hose that was attached 

to the battery before replacing and con-

firm that it is firmly connected to the hole 

section of the vehicle.

• Use the exhaust hole plug included with 

the battery replaced or the one installed 

on the battery prior to the replacement. 

(Depending on the battery to be 

replaced, the exhaust hole may be 

plugged.)

Exhaust hole plug
Exhaust hole
Exhaust hose

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

WARNING

■

When removing the 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.

A
B
C

■

Avoiding battery fires or explosions

Observe the following precautions to 

prevent accidentally igniting the flamma-

ble gas that may be emitted from the bat-

tery:

●

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.

●

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.

●

Do not allow the + and - clamps of the 

jumper cables to come into contact 

with each other.

●

Do not smoke, use matches, cigarette 

lighters or allow open flame near the 

battery.

■

Battery precautions

The battery contains poisonous and cor-

rosive acidic electrolyte, while related 

parts contain lead and lead compounds. 

Observe the following precautions when 

handling the battery:

●

When working with the 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 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 battery support, terminals, and 

other battery-related parts.

458

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.

WARNING

●

Do not allow children near the battery.

■

After recharging the battery

Have the battery inspected at any 

authorized Lexus retailer or Lexus 

authorized repairer, or any reliable 

repairer as soon as possible.

If the battery is deteriorating, continued 

use may cause the battery to emit a mal-

odorous gas, which may be detrimental 

to the health of passengers.

■

When replacing the battery

●

When the vent plug and indicator are 

close to the hold down clamp, the bat-

tery fluid (sulfuric acid) may leak.

●

For information regarding battery 

replacement, contact any authorized 

Lexus retailer or Lexus authorized 

repairer, or any reliable repairer.

●

After replacing, securely attach the 

exhaust hose and exhaust hole plug to 

the exhaust hole of the replaced bat-

tery. If not properly installed, gases 

(hydrogen) may leak into the vehicle 

interior, and there is the possible dan-

ger of the gas igniting and exploding.

NOTICE

■

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.

■

To prevent damaging the vehicle

The exclusive jump starting terminal is to 

be used when charging the battery from 

another vehicle in an emergency. It can-

not be used to jump start another vehicle.

If your vehicle overheats

The following may indicate that 
your vehicle is overheating.



The engine coolant temperature 
gauge (



P.74, 77) is in the red 

zone or a loss of engine power is 
experienced. (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