Lexus NX (2023 year). Manual in english

WARNING

Decelerate to the lowest appropriate speed as soon as possible. Do not drive over 80
km/h (50 mph).

●

Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure
immediately.

●

If the tire pressure warning light comes on even after tire inflation pressure adjustment,
it is probable that you have a flat tire. Have the flat tire replaced by the nearest any
authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.

●

Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose
control of the steering wheel or the brakes.

■

If a blowout or sudden air leakage should occur

The tire pressure warning system may not activate immediately.

NOTICE

■

To ensure the tire pressure warning system operates properly

Do not install tires with different specifications or makers, as the tire pressure warning
system may not operate properly.

Stop & Start cancel indicator (warning buzzer)

Condition

Cause / Remedy

(flashes)

The Stop & Start system may be malfunctioning.
Have the vehicle checked by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

Stop & Start system indicator (warning buzzer)

Condition

Cause / Remedy

（

flashes

）

If the driver's door is opened when the engine is stopped by the
Stop & Start system and the shift lever is in D, a buzzer will sound
and the Stop & Start system indicator will flash.
To stop the buzzer, close the driver's door.

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

533

When tr

ouble arises

Lexus parking assist-sensor OFF indicator (warning buzzer)

Condition

Cause / Remedy

Indicates a malfunction in the Lexus parking assist-sensor function
Have the vehicle checked by any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer immediately.

Indicates that the system is temporarily unavailable, possibly due to a
sensor being dirty or covered with ice, etc.
Follow the instructions displayed on the multi-information display.

PCS warning light (warning buzzer)

Condition

Cause / Remedy

Indicates a malfunction in the PCS (Pre-Collision System).
Follow the instructions displayed on the multiinformation display.

●

Illuminates when the PCS (Pre-Collision System) or VSC (Vehicle
Stability Control) system is disabled.

LTA indicator (warning buzzer)

Condition

Cause / Remedy

（

Or-

ange

）

Indicates a malfunction in the LTA (Lane Tracing Assist).

●

Follow the instructions displayed on the multiinformation
display.

LDA indicator (warning buzzer)

Condition

Cause / Remedy

（

Or-

ange

）

Indicates a malfunction in the LDA (Lane Departure Alert).

●

Follow the instructions displayed on the multiinformation
display.

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

534

Dynamic radar cruise control indicator (warning buzzer)

Condition

Cause / Remedy

（

Or-

ange

）

Indicates a malfunction in the dynamic radar cruise control
system.

●

Follow the instructions displayed on the multiinformation
display.

Cruise control indicator (warning buzzer)

Condition

Cause / Remedy

（

Or-

ange

）

Indicates a malfunction in the cruise control system.

●

Follow the instructions displayed on the multiinformation
display.

Driving assist infomation indicator

Condition

Cause / Remedy

Indicates one of the following systems is malfunctioning or disabled.

●

PCS (Pre-Collision System)

●

LDA (Lane Departure Alert)

●

PKSB (Parking Support Brake)

●

RCD (Rear Camera Detection)

●

BSM (Blind Spot Monitor)

●

RCTA(Rear crossing traffic alert)

●

Safe Exit Assist (with door opening control)

●

Automatic Rear Flashing Hazard Lights

●

Follow the instructions displayed on the multiinformation display.

* :

If equipped

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

535

When tr

ouble arises

Slip indicator

Condition

Cause / Remedy

(illu-

minates)

Indicates a malfunction in:

●

The VSC system;

●

The Trailer Sway Control system;

●

The TRC system;

●

The Trail Mode function

; or

●

The hill-start assist control system

Have the vehicle checked by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

Parking brake indicator

Condition

Cause / Remedy

(flashes)

It is possible that the parking brake is not fully engaged or released
Operate the parking brake switch once again.
This light comes on when the parking brake is not released. If the
light turns off after the parking brake is fully released, the system is
operating normally.

Indicates a malfunction in the parking brake system
Have the vehicle checked by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

Brake hold operated indicator (warning buzzer)

Condition

Cause / Remedy

(flashes)

Indicates a malfunction in the brake hold system
Have the vehicle checked by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

* :

If equipped

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

536

If a warning message is displayed

The multi-information display shows warnings for system malfunctions and incor-
rectly performed operations, and messages that indicate a need for maintenance.
When a message is displayed, perform 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 displayed, take the appropriate corrective action for the warning light.

INFORMATION

■

Warning messages

The warning messages explained below may differ from the actual messages according
to operation conditions and vehicle specifications.

■

Warning buzzer

In some cases, the buzzer may not be heard due to being in a noisy location or audio
sound.

"Engine Oil Level Low Add or Replace"

Cause

Remedy

The engine oil
level may be
low.

Check the level of the engine oil, and add engine oil if necessa-
ry.
This message may be displayed if the vehicle is stopped on
a slope. Move the vehicle to a level surface and check if the
message disappears.

"Engine Stopped Steering Power Low"

Cause

Remedy

This message is displayed if
the engine is stopped while
driving.

When steering wheel operations are heavier than
usual, grip the steering wheel firmly and operate it
using more force than usual.

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

537

When tr

ouble arises

"Auto Power OFF to Conserve Battery"

Cause

Remedy

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
approximately 5 minutes to recharge the battery.

Related Links

Changing the engine switch mode(P. 123)

"12-Volt Battery Charging System Malfunction Stop in a Safe Place See
Owner's Manual"

Cause

Remedy

It may indicate a
malfunction.

Immediately stop the vehicle and contact any authorized Lexus
retailer or Lexus authorized repairer, or any reliable repairer.
Continuing to drive the vehicle may be dangerous.

"Tyre Set Switching Incomplete Retry Tyre Set Registration See Own-
er's Manual"

Cause

Remedy

The wheel set change
could not be completed.

Check which wheel set is installed and perform the
change procedure again from the beginning.

Related Links

Selecting wheel set(P. 511)

"Headlight System Malfunction Visit Your Dealer"

Cause

Remedy

The system may be
malfunctioning.

Have the vehicle checked by any authorized Lexus retailer
or Lexus authorized repairer, or any reliable repairer.

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

538

"AWD System Overheated 2WD Mode Engaged"

Cause

Remedy

This message may
be displayed when
driving under ex-
tremely high load
conditions.

●

Drive the vehicle at low speeds or stop the vehicle in a
safe place with the engine running until the message is
cleared.

If the message is not cleared, have the vehicle inspected by
any authorized Lexus retailer or Lexus authorized repairer, or
any reliable repairer.

"Engine Coolant Temp High Stop in a Safe Place See Owner's Manual"

Remedy

Take the corrective actions for overheating.

Related Links

If your vehicle overheats(P. 620)

"Smart Entry & Start System Malfunction See Owner's Manual"

Cause

Remedy

It may indicate a
malfunction.

Have the vehicle checked by any authorized Lexus retailer
or Lexus authorized repairer, or any reliable repairer imme-
diately.

"Braking Power Low Stop in a Safe Place See Manual"

Cause

Remedy

It may indicate a
malfunction.

Immediately stop the vehicle in a safe place and contact any
authorized Lexus retailer or Lexus authorized repairer, or any
reliable repairer. Continuing to drive the vehicle may be dan-
gerous.

* :

If equipped

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

539

When tr

ouble arises

"Braking power low Stop in a safe place See Owner's Manual"

Cause

Remedy

It may indicate a
malfunction.

Immediately stop the vehicle in a safe place and contact any
authorized Lexus retailer or Lexus authorized repairer, or any
reliable repairer. Continuing to drive the vehicle may be dan-
gerous.

"Oil Pressure Low Stop in a Safe Place See Owner's Manual"

Cause

Remedy

It may indicate a
malfunction.

Immediately stop the vehicle in a safe place and contact any
authorized Lexus retailer or Lexus authorized repairer, or any
reliable repairer. Continuing to drive the vehicle may be dan-
gerous.

"High Power Consumption Power to Climate Temporarily Limited"

Cause

Remedy

If this message is displayed frequently,
there is a possible malfunction relating
to the charging system or the battery
may be deteriorating.

Have the vehicle checked by any author-
ized Lexus retailer or Lexus authorized
repairer, or any reliable repairer immedi-
ately.

A message that indicates the need for visiting your Lexus dealer

Cause

Remedy

The system or part shown on
the multi-information display
is malfunctioning.

Have the vehicle inspected by any authorized
Lexus retailer or Lexus authorized repairer, or any
reliable repairer immediately.

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

540

"New Key Registered Contact Your Dealer if You Did Not Register a
New Key"

Cause

Remedy

This message will be displayed
each time the driver’s door is
opened when the doors are un-
locked from the outside for ap-
proximately 10 days after a new
electronic key has been regis-
tered.

If this message is displayed but you have not
had a new electronic key registered, ask any
authorized Lexus retailer or Lexus authorized
repairer, or any reliable repairer to check if an
unknown electronic key (other than those in
your possession) has been registered.

"Parking Brake Temporarily Unavailable"

Cause

Remedy

If the parking brake is operated repeatedly
over a short period of time, the system may
restrict operation to prevent overheating.

If this happens, refrain from operat-
ing the parking brake. Normal oper-
ation will return after about 1 minute.

"EPB Activation Stopped Incompletely"

Cause

Remedy

Operate the parking brake switch. If
the message does not disappear after
operating the switch several times, the
system may be malfunctioning.

Have the vehicle checked by any au-
thorized Lexus retailer or Lexus author-
ized repairer, or any reliable repairer.

"Parking Brake Unavailable"

Cause

Remedy

Operate the parking brake switch. If
the message does not disappear after
operating the switch several times, the
system may be malfunctioning.

Have the vehicle checked by any au-
thorized Lexus retailer or Lexus author-
ized repairer, or any reliable repairer.

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

541

When tr

ouble arises

"Brake Hold Malfunction Press Brake to Deactivate Visit Your Dealer"

Cause

Remedy

The system may be
malfunctioning.

Have the vehicle checked by any authorized Lexus retailer
or Lexus authorized repairer, or any reliable repairer imme-
diately.

"Transmission Oil Temp High Stop in a Safe Place and See Owner's
Manual"

Cause

Remedy

Transmission will auto-
matically shift up.

Have the vehicle checked by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable
repairer.

"Shift System Malfunction Shifting Unavailable Drive to a Safe Place
and Stop"

Cause

Remedy

There is a malfunction
in the shift control sys-
tem.

Have the vehicle checked by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable
repairer immediately.

"Shift System Malfunction Driving Unavailable"

Cause

Remedy

There is a malfunction
in the shift control sys-
tem.

Have the vehicle checked by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable
repairer immediately.

* :

If equipped

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

542

If a message that indicates the need for the shift lever operation is
displayed

Cause

Remedy

To prevent the shift lever from being operated incorrectly
or the vehicle from moving unexpectedly, a message that
requires shifting the shift position may be displayed on
the multi-information display.

Follow the instruction
of the message and
shift the shift position.

"Shift System Malfunction Apply Parking Brake Securely When Parking
See Owner's Manual"

Cause

Remedy

It may indicate a
malfunction.

Have the vehicle checked by any authorized Lexus retailer
or Lexus authorized repairer, or any reliable repairer imme-
diately.

"P Switch Malfunction Apply Parking Brake Securely When Parking
See Owner's Manual"

Cause

Remedy

It may indicate a
malfunction.

Have the vehicle checked by any authorized Lexus retailer
or Lexus authorized repairer, or any reliable repairer imme-
diately.

"Shift System Unavailable Apply Parking Brake Securely When Parking
See Owner's Manual"

Cause

Remedy

It may indicate a
malfunction.

Have the vehicle checked by any authorized Lexus retailer
or Lexus authorized repairer, or any reliable repairer imme-
diately.

* :

If equipped

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

543

When tr

ouble arises

"Shift System Malfunction See Owner's Manual"

Cause

Remedy

It may indicate a
malfunction.

Have the vehicle checked by any authorized Lexus retailer
or Lexus authorized repairer, or any reliable repairer imme-
diately.

"Shift System Malfunction Stop in a Safe Place See Owner's Manual"

Cause

Remedy

It may indicate a
malfunction.

Have the vehicle checked by any authorized Lexus retailer
or Lexus authorized repairer, or any reliable repairer imme-
diately.

"Battery Low Shifting Unavailable See Owner's Manual"

Cause

Remedy

It may indicate a
malfunction.

Have the vehicle checked by any authorized Lexus retailer
or Lexus authorized repairer, or any reliable repairer imme-
diately.

"Key Battery Low Replace Key Battery"

Cause

Remedy

The electronic key has a low battery.

Replace the electronic key battery.

* :

If equipped

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

544

"System Malfunction Visit Your Dealer"

Cause

Remedy

Indicates one of the following systems is disabled.

●

PCS (Pre-Collision System)

●

LDA (Lane Departure Alert)

●

LTA (Lane Tracing Assist)

●

LCA (Lane Change Assist)

●

AHB (Automatic High Beam)

●

AHS (Adaptive High-beam System)

●

Dynamic radar cruise control system

●

RSA (Road Sign Assist)

●

BSM (Blind Spot Monitor)

●

RCTA (Rear Crossing Traffic Alert)

●

Automatic Rear Flashing Hazard Lights

●

Safe Exit Assist (with door opening control)

●

Lexus parking assist-sensor

●

PKSB (Parking Support Brake)

●

RCD (Rear camera detection)

●

Have the vehicle inspect-
ed by any authorized
Lexus retailer or Lexus
authorized repairer, or
any reliable repairer im-
mediately.

* :

If equipped

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

545

When tr

ouble arises

"System Stopped See Owner's Manual"

Cause

Remedy

Indicates one of the following systems is disabled.

●

PCS (Pre-Collision System)

●

LDA (Lane Departure Alert)

●

LTA (Lane Tracing Assist)

●

LCA (Lane Change Assist)

●

AHB (Automatic High Beam)

●

AHS (Adaptive High-beam System)

●

Dynamic radar cruise control system

●

RSA (Road Sign Assist)

●

BSM (Blind Spot Monitor)

●

RCTA (Rear Crossing Traffic Alert)

●

Automatic Rear Flashing Hazard Lights

●

Safe Exit Assist (with door opening con-

trol)

●

Lexus parking assist-sensor

●

PKSB (Parking Support Brake)

●

RCD (Rear camera detection)

●

Follow the following cor-
rection methods.

●

Check the voltage of the
battery

●

Remove any dirt or for-
eign matter from the
front/rear side radar sen-
sors

* :

If equipped

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

546

"System Stopped Front Camera Low Visibility See Owner's Manual"

Cause

Remedy

Indicates one of the following systems is
disabled.

●

PCS (Pre-Collision System)

●

LDA (Lane Departure Alert)

●

LTA (Lane Tracing Assist)

●

LCA

（

Lane Change Assist

）

●

AHB (Automatic High Beam)

●

AHS

（

Adaptive High-beam System

）

●

Dynamic radar cruise control system

●

RSA (Road Sign Assist)

●

Follow the following correction
methods.

●

Using the windshield wipers, re-
move the dirt or foreign matter
from the windshield.

●

Using the air conditioning system,
defog the windshield.

●

Close the hood, remove any stick-
ers, etc. to clear the obstruction in
front of the front camera.

"System Stopped Front Camera Out of Temp. Range Wait until Normal
Temperature"

Cause

Remedy

Indicates one of the following sys-
tems is disabled.

●

PCS (Pre-Collision System)

●

LDA (Lane Departure Alert)

●

LTA (Lane Tracing Assist)

●

LCA (Lane Change Assist)

●

AHB (Automatic High Beam)

●

AHS (Adaptive High-beam Sys-
tem)

●

Dynamic radar cruise control
system

●

RSA (Road Sign Assist)

●

Follow the following correction methods.

●

If the front camera is hot, such as after
the vehicle is parked in the sun, use the
air conditioning system to decrease the
temperature around the front camera

●

If a sunshade was used when the vehicle
was parked, depending on its type, the
sunlight reflected from the surface of the
sunshade may cause the temperature of
the front camera to become excessively
high

●

If the front camera is cold, such after the
vehicle is parked in an extremely cold envi-
ronment, use the air conditioning system to
increase the temperature around the front
camera

* :

If equipped

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

547

When tr

ouble arises

"System Stopped Front Radar Sensor Blocked Clean Radar Sensor"

Cause

Remedy

Indicates one of the following
systems is disabled.

●

PCS (Pre-Collision System)

●

LDA (Lane Departure
Alert)

●

LTA (Lane Tracing Assist)

●

LCA (Lane Change As-

sist)

●

AHB (Automatic High
Beam)

●

AHS (Adaptive High-beam
System)

●

Dynamic radar cruise con-
trol system

●

Follow the following correction methods.

●

Check if there is any foreign matter attached
to the radar sensor or radar sensor cover and
clean them if necessary.

→

P.318

●

This message may be displayed when driving in
an open area with few nearby vehicles or struc-
tures, such as a desert, grasslands, suburbs, etc.
The message may be cleared by driving the
vehicle in an area with structures, vehicles, etc.
nearby.

"System Stopped Front Radar Sensor Out of Temp. Range Wait until
Normal Temperature"

Cause

Remedy

Indicates one of the following systems is disabled.

●

PCS (Pre-Collision System)

●

LDA (Lane Departure Alert)

●

LTA (Lane Tracing Assist)

●

LCA (Lane Change Assist)

●

AHB (Automatic High Beam)

●

AHS (Adaptive High-beam System)

●

Dynamic radar cruise control system

●

The temperature of the ra-
dar sensor is outside of the
operating range. Wait for
the temperature to become
appropriate.

* :

If equipped

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

548

"System Stopped Front Radar In Self Calibration See Owner's Manual"

Cause

Remedy

Indicates one of the following
systems is disabled.

●

PCS (Pre-Collision System)

●

LDA (Lane Departure Alert)

●

LTA (Lane Tracing Assist)

●

LCA (Lane Change As-

sist)

●

AHB (Automatic High Beam)

●

AHS (Adaptive High-beam
System)

●

Dynamic radar cruise control
system

●

Follow the following correction methods.

●

Check if there is any foreign matter attached
to the radar sensor or radar sensor cover
and clean them if necessary.

→

P.318

●

The radar sensor may be misaligned and
will be adjusted automatically while driving.
Continue driving for a while.

"Parking Assist Unavailable Low Visibility See Owner's Manual"

Cause

Remedy

Indicates one of the following systems is disa-
bled.

●

RCD (Rear camera detection)

●

PKSB (Parking Support Brake)

●

Remove any dirt or foreign
matter from the front/rear
cameras.

"Unavailable Activ. Cond.not Satisfied See Owner's Manual"

Cause

Remedy

The LCA function cannot be used as

the operating conditions have not been
met.

→

P.352

●

Operate the turn signal lever again
after all of the operating conditions
are met.

* :

If equipped

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

549

When tr

ouble arises

If the engine will not start

When the engine will not start even though the starter operates

Cause

Remedy

There may not be suffi-
cient fuel in the vehicle’s
tank.

Refuel the vehicle.

The engine may be
flooded.

Try to restart the engine again following correct start-
ing procedures.

There may be a malfunc-
tion in the engine immo-
bilizer system.

●

If the key is touching or is covered by a metallic
object, move the key away from the object.

●

If the key is near to or touching a key to the securi-
ty system (key with a built-in transponder chip) of
another vehicle, move the key away from the other
key.

When a malfunction of the shift control system is suspected

If any of the following situations occurs, shift control system malfunctions are
possible.
Immediately stop the vehicle in a safe place on level ground, apply the parking
brake, and then contact any authorized Lexus retailer or Lexus authorized repairer,
or any reliable repairer.

1. When the warning message indicating the shift control system appears on the

multi-information display.

2. The display indicates that no shift position is selected for more than a few

seconds.

9-3. If the engine will not start

551

When tr

ouble arises

When the starter does not operate and the engine cannot be started

Cause

Remedy

Vehicles with a smart entry & start
system: The engine starting sys-
tem may be malfunctioning due
to an electrical problem such as
electronic key battery depletion
or a blown fuse.

A temporary measure is available to start the
engine.

One or both of the battery termi-
nals may be disconnected.

Check if a battery terminal is disconnected.

The battery may be discharged.

Restarting the engine using jumper (or boos-
ter) cables.

There may be a malfunction in the
steering lock system.

Contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable re-
pairer.
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.

Starting the engine in an emergency

When the engine cannot be started, the following steps can be used as an tempo-
rary measure to start the engine if the engine switch is functioning normally.
Do not use this starting procedure except in cases of emergency.

Pull the parking brake switch to check that the parking brake is set.

Parking brake indicator will come on.

Check that the shift position is in P.

9-3. If the engine will not start

553

When tr

ouble arises

Change the engine switch to ACC.

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 checked by any authorized Lexus retailer or Lexus authorized
repairer, or any reliable repairer immediately.

Starting the engine when the electronic key is not operating normally

Ensure that the shift position is in P and depress the brake pedal.

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

When the electronic key is detected, a buzzer will sound and the engine switch will
change to ON.
If the smart entry & start system has been disabled by a customization setting, the
engine switch will change to ACC.

Firmly depress the brake pedal and check that a message is shown on the
multi-information display.

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.

INFORMATION

■

Stopping the engine

Shift the shift position to P, set the parking brake and press the engine switch as you
normally do when stopping the engine.

■

Electronic key battery

As the above procedure is a temporary measure, it is recommended that the
electronic key battery be replaced immediately when the battery is depleted.

9-3. If the engine will not start

554

When the interior lights or headlights are dim and the engine cannot be
started

Cause

Remedy

The battery may be discharged.

Restarting the engine using the jumper (or
booster) cables.

The battery terminals may be
loose or corroded.

Check if a battery terminal is loose or corrod-
ed.

If the vehicle battery is discharged

WARNING

■

When replacing the battery

●

When the vent plug and indicator are close to the hold down clamp, the battery fluid
(sulfuric acid) may leak.

●

For information regarding battery replacement, contact any authorized Lexus retailer
or Lexus authorized repairer, or any reliable repairer.

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 front wheels because
the front wheels will be locked.

9-3. If the engine will not start

556

INFORMATION

■

When the battery is removed or discharged

●

In some cases, it may not be possible to unlock the doors using the smart entry & start
system after the battery has been replaced.
Use the wireless remote control or the mechanical key to lock or unlock the doors.

●

If the engine cannot be started the first time the engine switch is pressed after
removing and installing the battery, touch the Lexus emblem side of the electronic key
to the engine switch to start the engine.

●

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

●

Some systems may require initialization.

●

Vehicles with a Stop & Start system:
The Stop & Start system may not automatically stop the engine for up to an hour.

■

To prevent battery discharge

●

Turn off the headlights and the audio system while the engine 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 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.
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.

■

Charging the battery

The electricity stored in the 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 battery may discharge, and the engine may be
unable to start.

9-3. If the engine will not start

557

When tr

ouble arises

(The battery recharges automatically during driving.)

■

Replacing the battery

●

Vehicles with Stop & Start system: Use a genuine battery specifically designed for use
with the Stop & Start system or a battery with equivalent specifications to a genuine
battery. If an unsupported 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.

●

Vehicles with Stop & Start system: Use a battery that the case size is same as the
previous one (LN3), 20 hour rate capacity (20HR) is equivalent (65Ah) or greater,
and performance rating (CCA) is equivalent (603A) or greater.
Vehicles without Stop & Start system: Use a battery that the case size is same as the
previous one (LN3), 20 hour rate capacity (20HR) is equivalent (70Ah) or greater,
and performance rating (CCA) is equivalent (592A) or greater.

•

If the sizes differ, the 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 battery may discharge and engine may not be able to start.

Contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer for details.

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

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

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.

9-3. If the engine will not start

558

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.

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 battery terminals

When disconnecting a battery terminal, contact your Lexus dealer.
When disconnecting a battery terminal, contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.

9-3. If the engine will not start

559

When tr

ouble arises

To prevent the electronic key (mechanical key) from being locked inside the
vehicle, make sure to remove it from the vehicle before disconnecting a 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.

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 addition to electrical shocks and death or serious injury.

■

Avoiding battery fires or explosions

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

■

Battery precautions

The battery contains poisonous and corrosive 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.

9-3. If the engine will not start

560

WARNING

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.

●

Do not allow children near the battery.

INFORMATION

■

If a battery terminal has been disconnected

●

If a battery terminal has been disconnected, 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.
Make sure to remove the electronic key (mechanical key) from the vehicle before
disconnecting a 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.

●

The doors may not be able to be unlocked using the smart entry & start system
immediately after a 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 battery terminal is disconnected, information recorded by various computers
will be cleared.

●

Some systems may require initialization.

9-3. If the engine will not start

561

When tr

ouble arises

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

Cause

Remedy

The battery may be
discharged.

Restarting the engine using the jumper (or booster) cables.
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.

One or both of the
battery terminals
may be discon-
nected.

Check if a battery terminal is disconnected.
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.

The steering lock
system may be
malfunctioning.

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

9-3. If the engine will not start

562

When the horn sounds at a low volume and the engine cannot be started

Cause

Remedy

The battery may be discharged.

Restarting the engine using the jumper (or
booster) cables.

The battery terminal connections
may be loose or corroded.

The battery terminals may be loose or cor-
roded.

9-3. If the engine will not start

563

When tr

ouble arises

When the horn does not sound and the engine cannot be started

Cause

Remedy

The battery may be
discharged.

One or both of the
battery terminals
may be discon-
nected.

Check if a battery terminal is loose.
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.

The steering lock
system may be
malfunctioning.

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

9-3. If the engine will not start

564

Lexus NX (2023 year). Manual in english - page 17