Lexus NX250 (2022 year). Manual in english — page 35

"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 Cross Traffic Alert)

●

Automatic Rear Flashing Hazard Lights

●

Safe Exit Assist (with door opening control)

●

Intuitive parking assist

*

●

PKSB (Parking Support Brake)

*

●

RCD (Rear camera detection)

*

●

Follow the following cor-
rection methods.

●

Check the voltage of the
battery

●

Remove any dirt or foreign
matter from the front/rear
side radar sensors

* :

If equipped

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

580

"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 Temperature 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
System)

*

●

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 con-
ditioning system to decrease the tempera-
ture 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

581

9

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.351

●

This message may be displayed when driving
in an open area with few nearby vehicles or
structures, such as a desert, grasslands, sub-
urbs, 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 Temperature 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

582

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

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

●

Follow the following correction methods.

●

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

→

P.351

●

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 Activation Condition not Satisfied See Owner's Manual"

*

Cause

Remedy

The LCA function cannot be used as

the operating conditions have not been
met.

→

P.381

●

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

583

9

When tr

ouble arises

"Cruise Control Unavailable See Owner's Manual"

Cause

Remedy

Indicates one of the following systems is disabled.

●

Dynamic radar cruise control

●

Cruise control

A message is displayed when the driving assist switch is
pushed repeatedly.

●

Press the driving as-
sist switch quickly
and firmly.

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

584

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.

Related Links

Refueling(P. 191)
Starting the engine(P. 144)
If a warning message is displayed(P. 572)

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 your Lexus dealer.

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

585

9

When tr

ouble arises

When the starter operates slowly and the engine cannot be started

Cause

Remedy

The battery may be discharged.

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

A battery terminal may be loose
or corroded.

Check if a battery terminal is loose or cor-
roded.

Related Links

If the vehicle battery is discharged(P. 589)
Restarting the engine when the battery is discharged(P. 630)
If the vehicle battery is discharged(P. 589)

9-3. If the engine will not start

586

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

Cause

Remedy

The engine starting system 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 terminals
may be disconnected.

Check if a battery terminal is discon-
nected.

The battery may be discharged.

Restarting the engine using jumper (or
booster) cables.

There may be a malfunction in the
steering lock system.

Contact your Lexus dealer.
Contact your Lexus dealer if the prob-
lem cannot be repaired, or if repair pro-
cedures are unknown.

Related Links

Starting the engine in an emergency(P. 587)
Starting the engine when the electronic key is not operating normally (P. 588)
If the vehicle battery is discharged(P. 589)
Restarting the engine when the battery is discharged(P. 630)
If the vehicle battery is discharged(P. 589)

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.

1

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

Parking brake indicator will come on.

2

Check that the shift position is in P.

3

Change the engine switch to ACC.

4

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.

9-3. If the engine will not start

587

9

When tr

ouble arises

Have the vehicle checked by your Lexus dealer immediately.

Starting the engine when the electronic key is not operating normally

1

Ensure that the shift position is in P and 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 will sound and the engine switch will
change to ON.
If the smart access system with push-button start has been disabled by a customization
setting, the engine switch mode will change to ACC.

3

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

4

Press the engine switch.

In the event that the engine still cannot be started, contact your Lexus dealer.

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 elec-
tronic key battery be replaced immediately when the battery is depleted.

■

Changing engine switch modes

Release the brake pedal and press the engine switch in step

4

above. The engine will

not start and the mode will be changed each time the switch is pressed.

Related Links

Replace the electronic key battery(P. 625)

9-3. If the engine will not start

588

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.

Related Links

Restarting the engine when the battery is discharged(P. 630)
If the vehicle battery is discharged(P. 589)
If the vehicle battery is discharged(P. 589)
Key types(P. 57)
Opening/closing the doors(P. 68)
Using the mechanical key(P. 628)
If a door cannot be opened using the door opener switch(P. 634)
When removing the battery terminals(P. 592)
Items to initialize(P. 722)

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 your Lexus dealer.

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

589

9

When tr

ouble arises

INFORMATION

■

When the 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 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.

●

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.
If the battery has become discharged, have the vehicle inspected by your Lexus dealer.

●

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.
(The battery recharges automatically during driving.)

9-3. If the engine will not start

590

■

Replacing the battery

●

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 your Lexus dealer for details.

●

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.

•

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 your Lexus dealer 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

1

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.

2

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

3

Check that the door cannot be opened.

9-3. If the engine will not start

591

9

When tr

ouble arises

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

1

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.

2

Insert the mechanical key into the opening.

3

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

4

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 your Lexus dealer.
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.

9-3. If the engine will not start

592

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.
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.

9-3. If the engine will not start

593

9

When tr

ouble arises

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 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 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 access system with push-
button start 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

594

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

Cause

Remedy

The battery may be dis-
charged.

Restarting the engine 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 bat-
tery terminals may be dis-
connected.

Check if a 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.

Related Links

If the vehicle battery is discharged(P. 589)
Restarting the engine when the battery is discharged(P. 630)
If the vehicle battery is discharged(P. 589)
Key types(P. 57)
Locking/unlocking the doors(P. 72)
Opening/closing the doors(P. 68)
Using the mechanical key(P. 628)
If a door cannot be opened using the door opener switch(P. 634)
When removing the battery terminals(P. 592)
Items to initialize(P. 722)

9-3. If the engine will not start

595

9

When tr

ouble arises