warning light LEXUS NX300H 2016 Service Manual

5688-2. Steps to take in an emergency
NX300h_OM_USA_OM78082U
*1: This light illuminates on the multi-information display.
*2: Driver’s and front passenger’s seat belt warning buzzer:The driver’s seat belt warning buzzer sounds to alert the driver that his or her seat belt
is not fastened. Once the power switch is turned to ON mode, the buzzer sounds for
6 seconds. If the vehicle reaches a speed of 12 mph (20 km/h), the buzzer sounds
once. If the seat belt is st ill unfastened after 24 second s, the buzzer will sound inter-
mittently for 10 seconds. Then, if the seat be lt is still unfastened, the buzzer will sound
in a different tone for 20 more seconds.
The front passenger’s seat belt warning buzzer sounds to alert the front passenger
that his or her seat belt is not fastened. The buzzer sounds once if the vehicle reaches
a speed of 12 mph (20 km/h). If the seat belt is still unfastened after 24 seconds, the
buzzer will sound intermittently for 10 seconds. Then, if the seat belt is still unfastened,
the buzzer will sound in a different tone for 20 more seconds.
■SRS warning light
This warning light system monitors the airbag sensor assembly, front impact sensors, side
impact sensors (front), side impact sensors (r ear), driver’s seat position sensor, driver’s
seat belt buckle switch, front passenger occupant classification system (ECU and sen-
sors), “AIR BAG ON” indicator light, “AIR BAG OFF” indicator light, front passenger’s
seat belt buckle switch, driver ’s seat belt pretensioner, front passenger’s seat belt preten-
sioner and force limiter, airbags, interconnecting wiring and power sources. ( P. 4 0 )
■Front passenger detection sensor, seat belt reminder and warning buzzer
●If luggage is placed on the front passenger seat, the front passenger detection sensor
may cause the warning light to flash and the warning buzzer to sound even if a passen-
ger is not sittin g in the seat.
●If a cushion is placed on th e seat, the sensor may not detect a passenger, and the warn-
ing light may not operate properly.
■Electric power steering system warning light (warning buzzer)
When the 12-volt battery charge becomes insufficient of the voltage temporarily drops,
the electric power steering system warnin g light may come on and the warning buzzer
may sound.
■If the malfunction indicator lamp comes on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fuel tank immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after several driving trips.
If the light does not go off even after severa l trips, contact your Lexus dealer as soon as
possible.

5698-2. Steps to take in an emergency
8
When trouble arises
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■When the tire pressure warning light comes on
Inspect the appearance of the tire to check that the tire is not punctured.
If the tire is punctured: P. 5 7 5
If the tire is not punctured:
Carry out the following procedure after the tire temperature has lowered sufficiently.
●Check the tire inflation pressure and adjust to the appropriate level.
●If the warning light does not go out even after several minutes, check that the tire infla-
tion pressure is at the specified level and carry out initialization. ( P. 5 1 8 )
The warning light may come on again if the above operations are conducted without first
allowing the tire temperature to lower sufficiently.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such as natural air
leaks and tire inflation pressure changes caused by temperature. In this case, adjusting
the tire inflation pressure will turn off the warning light (after a few minutes).
■When a tire is replaced with a spare tire
Vehicles with a compact spare tire: The comp act spare tire is not equipped with a tire
pressure warning valve and transmitter. If a tire goes flat, the tire pressure warning light
will not turn off even though the flat tire ha s been replaced with the spare tire. Replace
the spare tire with the repaired tire and adjust the tire inflation pressure. The tire pressure
warning light will go off after a few minutes.
Vehicles with a full-size spare tire: The spare tire is also equipped with a tire pressure
warning valve and transmitter. The tire pressure warning light will turn on if the tire infla-
tion pressure of the spare tire is low. If a tire goes flat, the tire pressure warning light will
not turn off even though the flat tire has been replaced with the spare tire. Replace the
spare tire with the repaired tire and adjust the tire inflation pressure. The tire pressure
warning light will go off after a few minutes.
■Conditions that the tire pressure warning system may not function properly
 P. 5 2 1
■If the tire pressure warning light frequently comes on after blinking for 1 minute
If the tire pressure warning light frequently comes on after blinking for 1 minute when the
power switch is turned to ON mode, ha ve it checked by your Lexus dealer.
■Warning buzzer
In some cases, the buzzer may not be heard due to being in a noisy location or audio
sound.

5708-2. Steps to take in an emergency
NX300h_OM_USA_OM78082U
WA R N I N G
■If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact your Lexus dealer. The vehi-
cle will become extremely unstable during braking, and the ABS system may fail, which
could cause an accident resulting in death or serious injury.
■When the electric power steering system warning light comes on
When the light comes on yellow, the assist to the power steering is restricted. When the
light comes on red, the assist to the power steering is lost and handling operations of
the steering wheel become extremely heavy. When steering wheel operations are
heavier than usual, grip the steering wheel firmly and operate it using more force than
usual.
■If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause a loss of
vehicle control and result in death or serious injury.
●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 adjust-
ment, it is probable that you have a flat tire. Check the tires. If a tire is flat, change it
with the spare tire and have the flat tire repaired by the nearest Lexus dealer.
●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.

5718-2. Steps to take in an emergency
8
When trouble arises
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WA R N I N G
■Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly when cold and
inflated to the inflation pressure recomm ended by the vehicle manufacturer on the
vehicle placard or tire inflation pressure la bel (tire and load information label). (If your
vehicle has tires of a different size than the size indicated on the vehicle placard or tire
inflation pressure label [tire and load in formation label], you should determine the
proper tire inflation pressure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire pressure moni-
toring system (TPMS-tire pressure warning system) that illuminates a low tire pressure
telltale (tire pressure warning light) when on e or more of your tires is significantly
under-inflated. Accordingly, when the low ti re pressure telltale (tire pressure warning
light) illuminates, you should stop and check your tires as soon as possible, and inflate
them to the proper pressure. Driving on a significantly under-inflated tire causes the
tire to overheat and can lead to tire failure. Under-inflation also reduces fuel efficiency
and tire tread life, and ma y affect the vehicle’s handling and stopping ability.
Please note that the TPMS (tire pressure wa rning system) is not a substitute for proper
tire maintenance, and it is the driver’s resp onsibility to maintain correct tire pressure,
even if under-inflation has no t reached the level to trigger illumination of the TPMS low
tire pressure telltale (tire pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warning system) mal-
function indicator to indicate when the system is not operating properly. The TPMS
(tire pressure warning system) malfunction indi cator is combined with the low tire pres-
sure telltale (tire pressure warning light). When the system detects a malfunction, the
telltale will flash for approximately one minu te and then remain continuously illumi-
nated. This sequence will cont inue 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) malfun ctions 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 syst em) 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 specificatio ns or makers, as the tire pressure warning
system may not operate properly.

5728-2. Steps to take in an emergency
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If a warning message is displayed
Master warning light
The master warning light also comes on
or flashes in order to indicate that a mes-
sage is currently being displayed on the
multi-information display.
Multi-information display
Handling Method
Follow the instructio ns of the message
on the multi-information display.
If any of the warning messages are show n again after the following actions have
been performed, contact your Lexus dealer.
The warning lights and warning buzzers operate as follows depending on the
content of the message. If a message in dicates the need for inspection by a
dealer, have the vehicle inspected by your Lexus dealer immediately.
The multi-information display shows warnings of system malfunctions, incor-
rectly performed operations, and messages that indicate a need for mainte-
nance. When a message is shown, perform the correction procedure
appropriate to the message.
1
2
3
Messages and warnings
System
warning light
Wa r n i n g b u z z e r*Wa r n i n g
Comes on 
Sounds Indicates an important situation, such
as when a system related to driving is
malfunctioning or that danger may
result if the correction procedure is not
performed
Comes on
or flashesSounds
Indicates an important situation, such
as when the systems shown on the
multi-information display may be mal-
functioning
FlashesSounds
Indicates a situation, such as when
damage to the vehicle or danger may
result

5738-2. Steps to take in an emergency
8
When trouble arises
NX300h_OM_USA_OM78082U
*: A buzzer sounds the first time a message is shown on the multi-information display.
■System warning lights
The master warning light does not come on or flash in the following cases. Instead, a sep-
arate system warning light will come on along with a message shown on the multi-infor-
mation display.
●Malfunction of the ABS
The ABS warning light comes on. ( P. 566)
●Malfunction of th e charging system
The charging system warning light comes on. ( P. 565)
■If “Hybrid System Overheated Reduced Output Power” is shown
This message may be displayed when driv ing under severe operating conditions.
(For example, when drivin g up a long steep hill.)
Handling method: P. 5 9 9
■If “Cooling Performance of The Hybrid Battery Is Low” is shown
The filter may be clogged, or the air intake vents or ducts may be blocked. Have the vehi-
cle inspected by your Lexus dealer.
■If “Hybrid Battery Low Shift Out of N to Recharge” is shown
Message is displayed when the remaining charge for the hybrid battery (traction battery)
is low.
As the hybrid battery (traction battery) cannot be charged when the shift lever is in N,
when stopped for long periods of time shift the shift lever to P.
■If “Hybrid Battery Low Hybrid System St opped Shift to P and Restart” is shown
Message is displayed when the remaining charge for the hybrid battery (traction battery)
is low, because vehicle has been sh ifted N for a long period of time.
When operating the vehicle, restart the hybrid system.
■If “Shift to P Before Exiting Vehicle” is shown
Message is displayed when the driver’s door is opened without turning the power switch
to OFF with the shift lever in any position other than P.
Shift the shift lever to P.
■If “Shift Is in N Release Accele rator Before Shifting” is shown
Message is displayed when the accelerator pe dal has been depressed and the shift lever
is in N. Release the accelerator peda l and shift the shift lever to D or R.
Comes
onDoes not sound
Indicates a condition, such as malfunc-
tion of electrical components, their
condition, or indicates the need for
maintenance
FlashesDoes not sound
Indicates a situation, such as when an
operation has been performed incor-
rectly, or indicates how to perform an
operation correctly
System
warning
lightWa r n i n g b u z z e r*Wa r n i n g

5858-2. Steps to take in an emergency
8
When trouble arises
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Firmly tighten each wheel nut two or
three times in the order shown in the
illustration.
Tightening torque:
76 ft•lbf (103 N•m, 10.5 kgf•m)
Stow the flat tire, tire jack and all tools.
■The compact spare tire
●The compact spare tire is identified by the label “TEMPORARY USE ONLY” on the
tire sidewall.
Use the compact spare tire temporarily, and only in an emergency.
●Make sure to check the tire inflation pressure of the compact spare tire. ( P. 6 1 3 )
■After completing the tire change
The tire pressure warning system must be reset. ( P. 5 1 8 )
■When using the compact spare tire
As the compact spare tire is not equipped wi th a tire pressure warning valve and trans-
mitter, low inflation pressure of the spare ti re will not be indicated by the tire pressure
warning system. Also, if you replace the compact spare tire after the tire pressure warn-
ing light comes on, th e light remains on.
■When the compact spare tire is equipped
The vehicle becomes lower when driving with the compact spare tire compared to when
driving with standard tires.
■If you have a flat front tire on a road covered with snow or ice (except for 225/60R18
tires)
Install the compact spare tire on one of the rear wheels of the vehicle. Perform the follow-
ing steps and fit tire chains to the front tires:
Replace a rear tire with the compact spare tire.
Replace the flat front tire with the tire removed from the rear of the vehicle.
Fit tire chains to the front tires.
5
6
1
2
3

658What to do if... (Troubleshooting)
NX300h_OM_USA_OM78082U
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? ( P. 5 6 7 )
●The parking brake indicator is on
Is the parking brake released? ( P. 2 1 3 )
Depending on the situation, other type s of warning buzzer may also sound.
( P. 5 6 5 , 5 7 2 )
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. ( P. 8 8 )
To stop the alarm, turn the power switch to ON mode or start the hybrid system.
●Is the message displayed on the multi-information display?
Check the message on the multi-information display. ( P. 5 7 2 )
●When a warning light turns on or a warning message is displayed, refer to
P. 5 6 5 , 5 7 2 . A warning buzzer sounds during driving
An alarm is activated and the horn sounds
A warning buzzer sounds when leaving the vehicle
A warning light turns on or a warning message is displayed

660Alphabetical index
NX300h_OM_USA_OM78082U
Alphabetical index
A/C ............................................................ 430Air conditioning filter....................... 530
Automatic air conditioning system ................................................. 430
Micro dust and pollen filter ...........436
ABS (Anti-lock Brake System).......305 Function ................................................. 305
Warning light ...................................... 566
Active Sound Control (ASC) .......... 218
Air conditioning filter ..........................530
Air conditioning system ..................... 430 Air conditioning filter....................... 530
Automatic air conditioning system ................................................. 430
Micro dust and pollen filter ...........436
S-FLOW mode .................................. 432
Airbags ........................................................ 40 Airbag operating conditions ...........48
Airbag precautions for your child .......................................................... 43
Airbag warning light ........................ 566
Correct driving posture ....................30
Curtain shield airbag operating conditions........................48
Curtain shield airbag precautions ........................................... 46
Front passenger occupant classification system ......................... 53
General airbag precautions............ 43 Locations of airbags............................ 40
Modification and disposal of
airbags .....................................................47
Seat cushion airbag ............................. 40
Side airbag operating conditions ............................................. 48
Side airbag precautions .................... 45
Side and curtain shield airbags operating conditions ....................... 48
Side and curtain shield airbags precautions .......................................... 46
SRS airbag instructions for Canadian owners ................... 647
SRS airbags ............................................. 40
Alarm ........................................................... 88 Alarm ..........................................................88
Warning buzzer.................................569
Anchor brackets................................ 71, 73
Antenna Radio ........................................................ 364
Smart access system with push-button start....................140
Anti-lock brake system (ABS)........ 305 Function ..................................................305
Warning light .......................................566
Approach warning ................... 245, 259
Armrest .................................................... 465
ASC (Active Sound Control) ........... 218
Assist grips .............................................. 465
A

661Alphabetical index
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Audio system (with navigation system)
*
Audio system.......................................... 336 Antenna ..................................................364
Audio input............................................345
AUX port...............................................345
Bluetooth
® audio ............................. 390
CD player .............................................. 367
iPod ........................................................... 374
MP3/WMA disc ...............................367
Optimal use ..........................................354
Portable music player ....................... 381
Radio ......................................................... 361
Setup menu ........................................... 347
Steering wheel audio switches ............................................... 342
USB memory ....................................... 377
Automatic air conditioning system Air conditioning filter....................... 530
Automatic air conditioning system ................................................. 430
Micro dust and pollen filter ...........436
S-FLOW mode .................................. 432
Automatic headlight leveling system ...................................................... 221
Automatic High Beam ....................... 223
Automatic light control system......... 221
AUX port................................................. 345 Back door .................................................. 129
Wireless remote control.................. 129
Back-up lights Replacing light bulbs ...................... 550
Wattage ...................................................615
Battery (12-volt battery) If the 12-volt battery is discharged......................................... 594
Preparing and checking before winter.................................................... 326
Warning light .......................................565
Battery (traction battery) ....................... 81
Bluetooth
®............................................... 413
Audio system .......................................390
Hands-free system (for cellular phone) ....................... 392
Bottle holders ........................................ 448
Brake Brake Hold ............................................. 216
Fluid ............................................................ 612
Parking brake ........................................ 213
Regenerative braking ..........................79
Warning light .......................................565
Brake assist ............................................. 305
Brake Hold................................................ 216
Break-in tips ............................................. 176
Brightness control Instrument panel light control..................................................... 99
BSM (Blind Spot Monitor) ................. 316 Blind Spot Monitor function...........319
Rear Cross Traffic Alert function.................................................. 321
B
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.