Lexus NX450H+ (2024 year). Manual in english - page 21

WARNING

sequence will continue upon subsequent vehicle start-ups as long as the malfunction
exists. When the malfunction indicator is illuminated, the system may not be able to
detect or signal low tire pressure as intended.
TPMS (tire pressure warning system) malfunctions may occur for a variety of reasons,
including the installation of replacement or alternate tires or wheels on the vehicle that
prevent the TPMS (tire pressure warning system) from functioning properly. Always
check the TPMS (tire pressure warning system) malfunction telltale after replacing one or
more tires or wheels on your vehicle to ensure that the replacement or alternate tires and
wheels allow the TPMS (tire pressure warning system) to continue to function properly.

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.

Intuitive parking assist OFF indicator (warning buzzer)

Condition

Cause / Remedy

Indicates a malfunction in the intuitive parking assist function
Have the vehicle checked by your Lexus dealer 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 display.

●

If the PCS (Pre-Collision System) or VSC (Vehicle Stability Con-
trol) system is disabled, the PCS warning light will illuminate.

9-2. If a warning is indicated on the meter

663

9

When tr

ouble arises

LTA indicator (warning buzzer)

Condition

Cause / Remedy

(Yellow)

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

●

Follow the instructions displayed on the display.

LDA indicator (warning buzzer)

Condition

Cause / Remedy

(Yellow)

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

●

Follow the instructions displayed on the display.

Dynamic radar cruise control indicator (warning buzzer)

Condition

Cause / Remedy

(Yellow)

Indicates a malfunction in the dynamic radar cruise control system.

●

Follow the instructions displayed on the display.

Cruise control indicator (warning buzzer)

Condition

Cause / Remedy

(Yellow)

Indicates a malfunction in the cruise control system.

●

Follow the instructions displayed on the display.

PDA indicator (warning buzzer)

Condition

Cause / Remedy

(Yellow)

Indicates a malfunction in the PDA (Proactive Driving Assist)
Follow the instructions displayed on the display.

9-2. If a warning is indicated on the meter

664

Driving assist information indicator

Condition

Cause / Remedy

Indicates one of the following systems is malfunctioning.

●

PCS (Pre-Collision System)

●

LDA (Lane Departure Alert)

●

Follow the instructions displayed on the display.

Indicates one of the following systems is malfunctioning or disabled.

●

PKSB (Parking Support Brake)

*

●

RCD (Rear Camera Detection)

*

●

BSM (Blind Spot Monitor)

●

RCTA(Rear Cross Traffic Alert)

●

Safe Exit Assist

●

Follow the instructions displayed on the display.

Slip indicator

Condition

Cause / Remedy

(illuminates)

Indicates a malfunction in:

●

The VSC system;

●

The Trailer Sway Control system;

●

The TRAC system;

●

The Trail Mode function; or

●

The hill-start assist control system

Have the vehicle checked by your Lexus dealer immediately.

* : 

If equipped

9-2. If a warning is indicated on the meter

665

9

When tr

ouble arises

Parking brake indicator

Condition

Cause / Remedy

(U.S.A.) (flashes)

or

(Canada) (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 your Lexus dealer immediately.

Brake hold operated indicator (warning buzzer)

Condition

Cause / Remedy

(flashes)

Indicates a malfunction in the brake hold system
Have the vehicle checked by your Lexus dealer immediately.

9-2. If a warning is indicated on the meter

666

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 your Lexus dealer.
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.

 Related Links 

Checking and adding the engine oil(P. 602)

"Hybrid System Stopped Steering Power Low"

Cause

Remedy

This message is displayed if the
hybrid system 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 is indicated on the meter

667

9

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 hybrid system, operate
the hybrid system for approximately 5 minutes to
recharge the 12-volt battery.

 Related Links 

Changing the power switch mode(P. 184)

"Shift is in N Release Accelerator Before Shifting"

Cause

Remedy

The accelerator pedal has been de-
pressed when the shift position is in N.

Release the accelerator pedal and
change the shift position to D or R.

"Press brake when vehicle is stopped Hybrid system may overheat"

Cause

Remedy

The message may be displayed when the ac-
celerator pedal is depressed to hold the vehi-
cle while the vehicle is stopped on an incline,
etc.

The hybrid system may over-
heat. Release the accelerator
pedal and depress the brake
pedal.

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

Cause

Remedy

It may indicate a mal-
function.

Immediately stop the vehicle and contact your Lexus
dealer. Continuing to drive the vehicle may be danger-
ous.

"Traction battery needs to be protected. Shift into P to restart."

Cause

Remedy

This message is displayed when the hybrid battery
(traction battery) charge has become extremely low
because the vehicle has been left with the N shift
position selected for a certain amount of time.

When operating the ve-
hicle, shift to P and restart
the hybrid system.

9-2. If a warning is indicated on the meter

668

"Traction battery needs to be protected. Refrain from the use of N
position."

Cause

Remedy

This message may be dis-
played when the shift po-
sition is in N.

As the hybrid battery (traction battery) cannot be
charged when the shift position is in N, shift the shift
position to P when the vehicle is stopped.

"Hybrid System Overheated Output Power Reduced"

Cause

Remedy

This message may be
displayed when driving
under severe operating
conditions. (For exam-
ple, when driving up a
long steep hill.)

1

Stop the vehicle in a safe place.

2

Stop the hybrid system and carefully lift the hood.

3

After the hybrid system has cooled down, inspect
the hoses and radiator core (radiator) for any leaks.

If a large amount of coolant has leaked, immediately
contact your Lexus dealer.

 

A

Radiator

B

Cooling fan

4

Check that the coolant level is between the [FULL]
and [LOW] lines on the reservoir.

 

A

Reservoir

B

[FULL] line

C

[LOW] line

5

Add coolant if necessary.

Water can be used in an emer-
gency if coolant is unavailable.

6

After stopping the hybrid system and waiting for 5
minutes or more, start the hybrid system again and
check for the multi-information display.

9-2. If a warning is indicated on the meter

669

9

When tr

ouble arises

Cause

Remedy

This message may be
displayed when driving
under severe operating
conditions. (For exam-
ple, when driving up a
long steep hill.)

If the message does not disappear: Stop the hybrid sys-
tem and contact your Lexus dealer.
If the message is not displayed: The hybrid system tem-
perature has dropped and the vehicle may be driven
normally.
However, if the message appears again frequently, con-
tact your Lexus dealer.

WARNING

When opening the hood, observe the following precautions.

●

If steam is seen coming from under the hood, do not open the hood until the steam has
subsided. The engine compartment may be very hot.

●

After turning the hybrid system off, check that the "READY" indicator is off.
When the hybrid system is operating, the gasoline engine may automatically start, or
the cooling fan may suddenly operate even if the gasoline engine is stopped.
Also, it may operate for several minutes even after the power switch is turned off.
Do not touch or approach rotating parts such as the fan, which may lead to fingers or
clothing (especially a tie, a scarf or a muffler) getting caught, resulting in serious injury.

●

Do not loosen the coolant reservoir cap while the hybrid system and radiator are hot.
High temperature steam or coolant could spray out.

NOTICE

■

When adding engine/power control unit coolant

Add coolant slowly after the hybrid system has cooled down sufficiently.
Adding cool coolant to a hot hybrid system too quickly can cause damage to the hybrid
system.

■

To prevent damage to the cooling system

Observe the following precautions:

●

Avoid contaminating the coolant with foreign matter (such as sand, dust, etc.).

●

Do not use coolant additives.

9-2. If a warning is indicated on the meter

670

"Tire Set Switching Incomplete Try Tire Set Registration Again See
Owner'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. 629)

"Maintenance Required For Traction Battery At Your Dealer"

Cause

Remedy

The hybrid battery
(traction battery) is
scheduled to be in-
spected or replaced.

Have the vehicle inspected by your Lexus dealer immedi-
ately.

●

Continuing to drive the vehicle without having the hy-
brid battery (traction battery) inspected will cause the
hybrid system not to start.

●

If the hybrid system does not start, contact your Lexus
dealer immediately.

"Headlight System Malfunction Visit Your Dealer"

Cause

Remedy

The system may be malfunction-
ing.

Have the vehicle checked by your Lexus
dealer.

"AWD System Overheated Switching to 2WD Mode"

Cause

Remedy

AWD system
is overheated.

●

Stop the vehicle in a safe place with the hybrid system operat-
ing.

*1

If the message disappears after a while, there is no problem. If the
message remains, have the vehicle inspected by your Lexus dealer
immediately.

*1 : 

When stopping the vehicle, do not stop the hybrid system until the display message

has turned off.

9-2. If a warning is indicated on the meter

671

9

When tr

ouble arises

"AWD System Overheated 2WD Mode Engaged"

Cause

Remedy

AWD system has been
temporarily released
and switched to front-
wheel drive due to over-
heating.

●

Stop the vehicle in a safe place with the hybrid
system operating.

*2

If the message disappears after a while, AWD system will
automatically recover. If the message remains, have the
vehicle inspected by your Lexus dealer immediately.

"AWD System Malfunction 2WD Mode Engaged Visit Your Dealer"

Cause

Remedy

A malfunction occurs in the
AWD system.

●

Have the vehicle inspected by your Lexus
dealer immediately.

"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. 747)

"Access System with Elec.Key malfunction See owner's manual"

Cause

Remedy

It may indicate a malfunction.

Have the vehicle checked by your Lexus dealer
immediately.

"Braking Power Low Stop in a Safe Place See Owner's Manual"

Cause

Remedy

It may indicate a mal-
function.

Immediately stop the vehicle and contact your Lexus
dealer. Continuing to drive the vehicle may be danger-
ous.

*2 : 

When stopping the vehicle, do not stop the hybrid system until the display message

has turned off.

9-2. If a warning is indicated on the meter

672

"Oil pressure low Stop in a safe place See owner's manual"

Cause

Remedy

It may indicate a mal-
function.

Immediately stop the vehicle and contact your Lexus
dealer. Continuing to drive the vehicle may be danger-
ous.

"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 sys-
tem or the 12-volt battery may be deteriorating.

Have the vehicle checked
by your Lexus dealer imme-
diately.

A message that indicates the need for visiting your Lexus dealer

Cause

Remedy

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

Have the vehicle inspected by your
Lexus dealer immediately.

"A New Key has been Registered Contact Your Dealer for Details"

Cause

Remedy

This message will be displayed each
time the driver’s door is opened when
the doors are unlocked from the out-
side for approximately 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 your Lexus dealer to check if an un-
known 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.

9-2. If a warning is indicated on the meter

673

9

When tr

ouble arises

"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 your Lexus
dealer.

"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 your Lexus
dealer.

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

Cause

Remedy

The system may be malfunc-
tioning.

Have the vehicle checked by your Lexus dealer
immediately.

"Maintenance required for DCDC converter cooling parts See Own-
er's Manual"

Cause

Remedy

The air intake vent or filter of the DC/DC
converter may be clogged, the air intake
vent may be blocked, or there may be a
gap in the duct. Therefore, perform the
following correction procedure.

●

Clean the DC/DC converter air
intake vent.

If the warning message is shown
even if the vents are cleaned, have
the vehicle inspected by your Lexus
dealer.

 Related Links 

Cleaning DC/DC converter air intake vent(P. 585)

9-2. If a warning is indicated on the meter

674

"EV Mode Unavailable"

Cause

Remedy

The EV drive mode is not available.
The reason the EV drive mode is not available (the vehicle is
idling, battery charge is low, vehicle speed is higher than the
EV drive mode operating speed range or accelerator pedal is
depressed too much) may be displayed.

Use the EV drive
mode when it be-
comes available.

"Charging Stopped Due to Pulled Charging Connector"

Cause

Remedy

●

Charging connector is re-
moved while charging

●

After the hybrid battery
(traction battery) is fully
charged, the charging con-
nector is removed while the
hybrid battery (traction bat-
tery) is being recharged
again because electricity-
consuming functions

*3

 have

been used and the remaining
charge is now reduced.

If the charging connector is disconnected dur-
ing charging, charging will be suspended. To
continue charging, reconnect the charging
connector.

*3 : 

Electricity is consumed when operating traction battery heater. Using My Room

Mode also consumes power.

9-2. If a warning is indicated on the meter

675

9

When tr

ouble arises

Cause

Remedy

Charging connector is not se-
curely connected

Check the connection status of the charging
connector.

●

When connecting the charging connector,
make sure not to touch the latch release but-
ton. Insert the charging connector securely
until you hear a click. The charging connec-
tor may not be connected correctly if the
latch release button is pressed while insert-
ing.

●

After connecting the charging connector,
check that the latch release button is not
pressed and the charging indicator of the
charging port is turned on.

If charging cannot be carried out, even though
the proper procedures were followed, have the
vehicle inspected by your Lexus dealer.

Latch release button of charg-
ing connector was pressed
while charging

When the latch release button is pressed while
charging, charging stops. To continue charging,
reconnect the charging connector.

"Charging Complete Limited Charge Due to Battery Temp"

Cause

Remedy

Charging was stopped to protect the
hybrid battery (traction battery) as it
continued to remain hot for a certain
period of time.

Allow the hybrid battery (traction bat-
tery) to cool down and perform charg-
ing again if the charging amount has
not reached the desired amount.

9-2. If a warning is indicated on the meter

676

"Charging Stopped Check Charging Source"

Cause

Remedy

Problem in
power supply
from external
power source

Check the following items.

●

Plug is not disconnected

●

Plug is securely inserted

●

Power source indicator on the CCID (Charging Circuit Inter-
rupting Device) is illuminated

●

The circuit breaker has tripped

●

Extension cord is not used and outlet is not overloaded

●

Connected to a dedicated power line

●

Electrical leakage has occurred or not

If there is no problem with any of the above items, there may be
a problem with the outlet of the building. Contact an electrician
and request an inspection. (Contact the facility manager of the
charging station when there is a problem with charging station.)
If charging cannot be carried out, even though there is no prob-
lem with the power source path, there may be a malfunction in
the system. Have the vehicle inspected by your Lexus dealer.
Furthermore, if the error warning indicator on the CCID
(Charging Circuit Interrupting Device) is flashing, there may
be an electrical leakage. Consult your Lexus dealer.

Charger has
stopped
charging

●

Charging may be canceled by an interruption of power
supply depending on specifications of a charger. Refer to the
instructions provided with the charger.

•

When charging is stopped using the charger

•

Equipment with charging schedule function

•

Equipment that is not compatible with the charging schedule
function of the vehicle

●

Check if it is possible to charge with the AC charging cable
equipped to the vehicle. If charging cannot be carried out,
even when using the genuine AC charging cable, consult
your Lexus dealer.

9-2. If a warning is indicated on the meter

677

9

When tr

ouble arises

Cause

Remedy

Charger is not
compatible
with vehicle

Check if it is possible to charge with the AC charging cable
equipped to the vehicle.
If charging cannot be carried out, even when using the genuine
AC charging cable, consult your Lexus dealer.

"Charging Stopped High Energy Use See Owner's Manual"

Cause

Remedy

Power is being
consumed by
electrical com-
ponents of vehi-
cle

Check the following items, and then carry out charging again.

●

If the headlights and audio are turned on, turn them off.

●

Turn the power switch off.

If charging cannot be carried out, even after performing the
above, the 12-volt battery may not be sufficiently charged.
Operate the hybrid system for approximately 15 minutes or
more to charge the 12-volt battery.

"Charging System Malfunction See Owner's Manual"

Cause

Remedy

Malfunction occurred in charging
system

Have the vehicle checked by your Lexus
dealer.

"The Traction Battery Temp is low System put priority on charging to
preserve battery condition" (Alaska and Canada only)

Cause

Remedy

The traction battery
warming control
was operated

When the traction battery warming control operates, the
charging schedule is not used and charging is performed.
This is a control to protect the hybrid battery (traction
battery), and not a malfunction.

9-2. If a warning is indicated on the meter

678

"Engine Started to Clean System EV Driving Unavailable"

Cause

Remedy

EV driving may be canceled in
order to protect the hybrid sys-
tem, etc.

In this case, perform driving with the gasoline
engine until EV driving will be returned to
automatically.

"No New Fuel has been Added Recently Please refuel"

Cause

Remedy

Refueling has not been performed for a certain amount
of time, and the quality of the fuel in the fuel tank may
have decreased.

Refuel the vehicle im-
mediately.

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

Cause

Remedy

There is a malfunction in the shift
control system.

Have the vehicle checked by your Lexus
dealer immediately.

"Shift System Malfunction Driving Unavailable"

Cause

Remedy

There is a malfunction in the shift
control system.

Have the vehicle checked by your Lexus
dealer immediately.

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.

9-2. If a warning is indicated on the meter

679

9

When tr

ouble arises

"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 your Lexus dealer
immediately.

"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 your Lexus dealer
immediately.

"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 your Lexus dealer
immediately.

"Shift System Malfunction See Owner's Manual"

Cause

Remedy

It may indicate a malfunction.

Have the vehicle checked by your Lexus dealer
immediately.

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

Cause

Remedy

It may indicate a malfunction.

Have the vehicle checked by your Lexus dealer
immediately.

"Battery Low Shifting Unavailable See Owner's Manual"

Cause

Remedy

It may indicate a malfunction.

Have the vehicle checked by your Lexus dealer
immediately.

9-2. If a warning is indicated on the meter

680

"Key Battery Low Replace Key Battery"

Cause

Remedy

The electronic key has a low battery.

Replace the electronic key battery.

"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)

●

 PDA (Proactive Driving Assist)

*

●

 BSM (Blind Spot Monitor)

●

 RCTA (Rear Cross Traffic Alert)

●

 Automatic Rear Flashing Hazard Lights

●

 Safe Exit Assist

●

Intuitive parking assist

*

●

 PKSB (Parking Support Brake)

*

●

 RCD (Rear camera detection)

*

●

Have the vehicle inspected
by your Lexus dealer imme-
diately.

* : 

If equipped

9-2. If a warning is indicated on the meter

681

9

When tr

ouble arises

"System Stopped See Owner's Manual"

Cause

Remedy

Indicates one of the fol-
lowing systems is disa-
bled.

●

PCS (Pre-Collision
System)

●

LDA (Lane Departure
Alert)

●

LTA (Lane Tracing As-
sist)

●

 LCA (Lane

Change Assist)

*

●

AHB (Automatic High
Beam)

*

●

AHS (Adaptive High-
beam System)

*

●

Dynamic radar cruise
control system

●

 RSA (Road Sign

Assist)

●

PDA (Proactive Driv-
ing Assist)

●

 BSM (Blind Spot

Monitor)

●

 RCTA (Rear

Cross Traffic Alert)

●

 Safe Exit Assist

●

Intuitive parking assist

*

●

 PKSB (Parking

Support Brake)

*

●

Follow the following correction methods.

●

Check the voltage of the 12-volt battery

●

Check the sensors that the Lexus Safety System + 3
uses for foreign matter covering them. Remove them
if any. 

(

→

 P.386)

●

Check if the back door is open.

* : 

If equipped

9-2. If a warning is indicated on the meter

682

Cause

Remedy

●

 RCD (Rear cam-

era detection)

*

●

Follow the following correction methods.

●

Check the voltage of the 12-volt battery

●

Check the sensors that the Lexus Safety System + 3
uses for foreign matter covering them. Remove them
if any. 

(

→

 P.386)

●

Check if the back door is open.

Indicates the sensors
may not be operating
properly. 

(

→

 P.389)

●

Check the rear bumper around the sensors
used by the BSM, RCTA, Automatic Rear Flash-
ing Hazard Lights, or Safe Exit Assist for for-
eign matter covering them. Remove them if any.

(

→

 P.374,454,477,485,465)

●

Check the sensors including camera sensors used
by the Lexus parking assist-sensor, PKSB, or RCD
for foreign matter covering them. Remove them if
any. 

(

→

 P.454,461)

●

Check the sensors including camera sensors used
by the Lexus parking assist-sensor, PKSB, or RCD
for foreign matter covering them. Remove them if
any. 

(

→

 P.470)

●

When problems are solved and the sensors are
operational, this indication may disappear by itself.

9-2. If a warning is indicated on the meter

683

9

When tr

ouble arises

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

Cause

Remedy

Indicates one of the following systems is dis-
abled.

●

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)

●

 PDA (Proactive Driving Assist)

●

Follow the following correction
methods.

●

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

●

Using the air conditioning sys-
tem, defog the windshield.

●

Close the hood, remove any
stickers, etc. to clear the ob-
struction in front of the front
camera.

* : 

If equipped

9-2. If a warning is indicated on the meter

684

"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 Sys-
tem)

*

●

Dynamic radar cruise control sys-
tem

●

 RSA (Road Sign Assist)

●

 PDA (Proactive Driving As-

sist)

●

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
environment, use the air conditioning sys-
tem to increase the temperature around
the front camera

* : 

If equipped

9-2. If a warning is indicated on the meter

685

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 control
system

●

 PDA (Proactive Driving

Assist)

●

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.386

●

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

●

 PDA (Proactive Driving Assist)

●

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 is indicated on the meter

686

"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 sys-
tem

●

 PDA (Proactive Driving As-

sist)

●

Follow the following correction meth-
ods.

●

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

→

 P.386

●

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

"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.410

●

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

"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.

* : 

If equipped

9-2. If a warning is indicated on the meter

687

9

When tr

ouble arises

"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.

"Parking Assist Unavailable Sensor Blocked"

Cause

Remedy

A sensor may be covered with
water drops, ice, snow, dirt, etc.

●

Remove the water drops, ice, snow, dirt,
etc., from the sensor to return the system to
normal.

If a sensor is dirty, the position of the dirty sen-
sor will be shown on the display.

Due to ice forming on a sensor
at low temperatures, a warning
message may be displayed or the
sensor may not be able to detect
an object.

●

Once the ice melts, the system will return
to normal.

If a warning message is displayed
even if the sensor is clean, there
may be a sensor malfunction.

●

Have the vehicle inspected by your Lexus
dealer.Have the vehicle inspected by any
authorized Lexus retailer or Lexus author-
ized repairer, or any reliable repairer.

"Check Engine"

Cause

Remedy

It may indicate a malfunc-
tion.

●

Have the vehicle inspected by your Lexus dealer
immediately.

"Hybrid System Malfunction"

Cause

Remedy

It may indicate a malfunc-
tion.

●

Have the vehicle inspected by your Lexus dealer
immediately.

* : 

If equipped

9-2. If a warning is indicated on the meter

688

"Accelerator System Malfunction"

Cause

Remedy

It may indicate a malfunc-
tion.

●

Have the vehicle inspected by your Lexus dealer
immediately.

"Plug-in Charging System Malfunction"

Cause

Remedy

It may indicate a malfunc-
tion.

●

Have the vehicle inspected by your Lexus dealer
immediately.

"Traction battery system malfunction"

Cause

Remedy

It may indicate a malfunc-
tion.

●

Have the vehicle inspected by your Lexus dealer
immediately.

"Hybrid System Stopped"

Cause

Remedy

The vehicle may have run
out of fuel.

●

Stop the vehicle in a safe place and, if the fuel level
is low, refuel the vehicle.

"Engine stopped No Fuel"

Cause

Remedy

The vehicle may have run
out of fuel.

●

Stop the vehicle in a safe place and, if the fuel level
is low, refuel the vehicle.

9-2. If a warning is indicated on the meter

689

9

When tr

ouble arises

If the hybrid system will not start

When the hybrid system cannot be started even though the correct
starting procedure is being followed

Cause

Remedy

If the smart access system with
push-button start has been disabled
by a setting, the electronic key may
not operate normally.

Make sure that the smart access system
with push-button start has not been disa-
bled by a customization setting. If the func-
tion has been disabled, enable it.

If the electronic key has been set
to battery saving mode, it may not
operate normally.

Check if electronic key has been set to
battery saving mode. If it is, cancel the
mode.

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

Refuel the vehicle.

There may be a malfunction in the
immobilizer 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 security system (key with a built-in
transponder chip) of another vehicle,
move the key away from the other key.

The hybrid system may be malfunc-
tioning due to an electrical problem
such as electronic key battery de-
pletion or a blown fuse.

However, depending on the type of mal-
function, a temporary measure is available
to start the hybrid system.

There may be a malfunction in the
shift control system.

*1

Contact your Lexus dealer.

There is a possibility that the tem-
perature of the hybrid battery (trac-
tion battery) is extremely low (ap-
proximately below -22°F [-30°C]).

Try to start the hybrid system again after
the temperature of the hybrid battery in-
creases due to the outside temperature
increase etc.

 Related Links 

Starting the hybrid system in an emergency(P. 691)
Starting the hybrid system when the electronic key is not operating normally (P. 691)
If a warning message is displayed(P. 667)

*1 : 

It may not be possible to shift the shift position from P.

9-3. If the hybrid system will not start

690

Key types(P. 102)
Refueling(P. 219)
Starting the hybrid system(P. 182)
Enable the immobilizer system(P. 124)
Changing the power switch mode(P. 184)

Starting the hybrid system in an emergency

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

Turn the power switch to ACC 

*2

.

*3

4

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 system may be
malfunctioning.
Have the vehicle checked by your Lexus dealer immediately.

Starting the hybrid system 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 power switch.

When the electronic key is detected, a buzzer will sound and the power switch mode
will change to ON.
If the smart access system with push-button start has been disabled by a customization
setting, the power switch mode will change to ACC.

*2 : 

ACC mode can be enabled/disabled on a customize setting.

*3 : 

When ACC is disabled, turn the power switch to ON then OFF, and perform the

following steps within 5 seconds.

9-3. If the hybrid system will not start

691

9

When tr

ouble arises

3

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

4

Press the power switch.

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

INFORMATION

■

Stopping the hybrid system

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

■

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 power switch modes

Release the brake pedal and press the power switch in step 

4

 above. The hybrid

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

 Related Links 

Replace the electronic key battery(P. 704)

9-3. If the hybrid system will not start

692

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

Cause

Remedy

The 12-volt battery may be dis-
charged.

Restarting the hybrid system using the jump-
er (or booster) cables.

The 12-volt battery terminals may
be loose or corroded.

Check if a 12-volt battery terminal is loose or
corroded.

 Related Links 

Restarting the hybrid system when the 12-volt battery is discharged(P. 709)
If the vehicle 12-volt battery is discharged(P. 693)
Key types(P. 102)
Opening/closing the doors(P. 113)
Using the mechanical key(P. 707)
If a door cannot be opened using the door opener switch(P. 713)
When removing the 12-volt battery terminals(P. 697)
Items to initialize(P. 803)

If the vehicle 12-volt battery is discharged

WARNING

■

When replacing the 12-volt battery

●

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

●

For information regarding 12-volt battery replacement, contact your Lexus dealer.

If the 12-volt 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.

INFORMATION

■

When the 12-volt battery is removed or discharged

●

In some cases, it may not be possible to unlock the doors using the smart access
system with push-button start after the 12-volt battery has been replaced.

9-3. If the hybrid system will not start

693

9

When tr

ouble arises

Use the wireless remote control or the mechanical key to lock or unlock the doors.

●

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

●

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

●

Some systems may require initialization.

■

To prevent 12-volt battery discharge

●

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

●

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

■

If the vehicle 12-volt battery is discharged

●

The doors cannot be locked or unlocked using the Smart access system with push-
button start or wireless remote control, and the door opener switches will not operate.
Use the mechanical key to enable/disable manual release handle operation. By
enabling manual release handle operation, the door can be opened.

●

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

●

Some systems may require initialization.

■

Charging the 12-volt battery

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

■

When replacing the 12-volt battery

●

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

•

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

9-3. If the hybrid system will not start

694