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3436-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manu-
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6
Maintenance and care
■The tire pressure warning system
must be initialized in the following
circumstances:
When adjusting the tire inflation
pressure.
When the tire inflation pressure is
changed such as when changing
traveling speed.
When rotating the tires.
When changing the tire.
When the tire pressure warning system
is initialized, the cu rrent tire inflation
pressure is set as the benchmark pres-
sure.
■How to initialize the tire pressure
warning system
1 Park the vehicle in a safe place and
turn the power switch off.
Initialization cannot be performed while
the vehicle is moving.
2 Adjust the tire inflation pressure to
the specified cold tire inflation pres-
sure level.
Make sure to adjust th e tire pressure to the
specified cold tire infl ation pressure level.
The tire pressure warning system will oper-
ate based on this pressure level.
3 Turn the power switch to ON
mode. 4
Press or of the meter con-
trol switches and select .
5 Press or of the meter con-
trol switches, select the “Vehicle
Settings” and then press .
6 Press or of the meter con-
trol switches, select the “TPMS”
and then press and hold the .
The “Tire Pressure Recalibrating. Please
Wait Until Complete” will be displayed on
the multi-information display and the tire
pressure warning light will blink slowly 3
times.
When the message di sappears, initializa-
tion is complete.
■Initializing the tire pressure warning sys-
tem
Initialize the system wi th the tire inflation
pressure adjusted to the specified level.
■The initialization operation
●Make sure to carry out initialization after
adjusting the tire inflation pressure.
Also, make sure the tires are cold before
carrying out initialization or tire inflation
pressure adjustment.
●If you have accidentally turned the power
switch off during initialization, it is not
necessary to press the reset switch again
as initialization will restart automatically
when the power switch has been turned
to ON mode for the next time.
●If you accidentally press the reset switch
when initialization is not necessary, adjust
Initializing the tire pressure
warning system
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3456-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manu-
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6
Maintenance and care
The recommended cold tire inflation
pressure and tire size are displayed on
the tire and loading information label.
( P.408)
Tire valve
Tire pressure gauge 1
Remove the tire valve cap.
2 Press the tip of the tire pressure
gauge onto the tire valve.
3 Read the pressure using the gauge
gradations.
4 If the tire inflation pressure is not at
the recommended level, adjust the
pressure.
If you add too much air, press the
center of the valve to deflate.
5 After completing the tire inflation
pressure measurement and adjust-
ment, apply soapy water to the
valve and check for leakage.
6 Put the tire valve cap back on.
■Tire inflation pressure check interval
You should check tire inflation pressure
every two weeks, or at least once a month.
Do not forget to check the spare.
■Effects of incorrect tire inflation pres-
sure
Driving with incorrect ti re inflation pressure
may result in the following:
●Reduced fuel economy
●Reduced driving comfort and poor han-
dling
●Reduced tire life due to wear
●Reduced safety
●Damage to the drive train
If a tire needs frequent inflating, have it
checked by your Lexus dealer.
■Instructions for checking tire inflation
pressure
When checking tire inflation pressure,
observe the following:
●Check only when the tires are cold.
If your vehicle has been parked for at
least 3 hours or has not been driven for
more than 1 mile or 1.5 km, you will get an
accurate cold tire inflation pressure read-
Tire inflation pressure
Checking the specified tire infla-
tion pressure
Inspection and adjustment pro-
cedure
A
B
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359
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7
7
When trouble arises
When trouble arises
7-1. Essential informationEmergency flashers.................. 360
If your vehicle has to be stopped in an emergency .......................... 360
7-2. Steps to take in an emergency If your vehicle needs to be towed........................................................ 362
If you think something is wrong ........................................................ 365
If a warning light turns on or a warning buzzer sounds ....... 367
If a warning message is displayed ........................................................ 376
If you have a flat tire.................. 379
If the hybrid system will not start ........................................................ 387
If you lose your keys ................. 388
If the fuel filler door cannot be opened........................................ 389
If the electronic key does not operate properly .................... 389
If the 12-volt battery is discharged ........................................................ 392
If your vehicle overheats ........ 396
If the vehicle becomes stuck 399
Page 363 of 460

3637-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
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7
When trouble arises
The following may indicate a problem
with your hybrid tr ansmission. Contact
your Lexus dealer or commercial tow-
ing service before towing. ( P.362)
The hybrid warning message shows
on the multi-information display and
the vehicle does not move.
The vehicle makes an abnormal
sound.
Do not tow with a sling-type truck to
prevent body damage.
From the front
Use a towing dolly under the rear
wheels.
From the rear
Use a towing dolly under the front
wheels.
If your vehicle is transported by a flat-
bed truck, it should be tied down at the
locations shown in the illustration.
NOTICE
■Recreational towing (behind motor
home, etc.)
Never dinghy tow your vehicle to pre-
vent causing serious damage to the
Hybrid AWD system and transmission.
( P.167)
Situations when it is necessary to
contact dealers before towing
Towing with a sling-type truck
Towing with a wheel-lift type
truck
Using a flatbed truck
Page 367 of 460

3677-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
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7
When trouble arises
■Brake system warning light (warning buzzer)
■Charging system warning light*
*: This light illuminates on the multi-information display.
■Output control warning light* (warning buzzer)
*: This light illuminates on the multi-information display.
If a warning light turns on or a warning buzzer sounds
Calmly perform the following actions if any of the warning lights comes on or
flashes. If a light comes on or flashes, bu t then goes off, this does not necessar-
ily indicate a malfunction in the system. However, if this continues to occur,
have the vehicle inspected by your Lexus dealer.
Actions to the warning lights or warning buzzers
Warning lightDetails/Actions
(U.S.A.)
(Red)
(Canada)
Indicates that:
The brake fluid level is low; or
The brake system is malfunctioning
Immediately stop the vehicl e in a safe place and con-
tact your Lexus dealer. Continuing to drive the vehicle
may be dangerous.
Warning lightDetails/Actions
Indicates a malfunction in the vehicle’s charging system
Immediately stop the vehicl e in a safe place and con-
tact your Lexus dealer. Continuing to drive the vehicle
may be dangerous.
Warning lightDetails/Actions
Indicates that the hybrid system is overheated
P. 396
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3687-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_M78287_en
■Low engine oil pressure warning light* (warning buzzer)
*: This light illuminates on the multi-information display.
■High coolant temperature warning light* (warning buzzer)
*: This light illuminates on the multi-information display.
■Brake system warning light
■Malfunction indicator lamp
Warning lightDetails/Actions
Indicates that the engine oil pressure is too low
Immediately stop the vehicl e in a safe place and con-
tact your Lexus dealer. Continuing to drive the vehicle
may be dangerous.
Warning lightDetails/Actions
Indicates that the engine is overheating
Immediately stop the vehicle in a safe place. Continu-
ing to drive the vehicle may be dangerous.
Handling method ( P.396)
Warning lightDetails/Actions
(Yellow)
Indicates a malfunction in:
The regenerative braking system;
The electronically controlled brake system; or
The electric parking brake
Have the vehicle inspected by your Lexus dealer
immediately.
Warning lightDetails/Actions
(U.S.A.)
(Canada)
Indicates a malfunction in:
The hybrid system;
The electronic engine control system;
The electronic throttle control system; or
The emission control system
Have the vehicle inspected by your Lexus dealer
immediately.
Page 369 of 460

3697-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
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7
When trouble arises
■SRS warning light
■ABS warning light
■Electric power steering system warning light (warning buzzer)
■PCS warning light
Warning lightDetails/Actions
Indicates a malfunction in:
The SRS airbag system;
The front passenger occupant classification system; or
The seat belt pretensioner system
Have the vehicle inspected by your Lexus dealer
immediately.
Warning lightDetails/Actions
(U.S.A.)
(Canada)
Indicates a malfunction in:
The ABS; or
The brake assist system
Have the vehicle inspected by your Lexus dealer
immediately.
Warning lightDetails/Actions
(Yellow)
(Red)
Indicates a malfunction in the EPS (Electric Power Steer-
ing) system
Have the vehicle inspected by your Lexus dealer
immediately.
Warning lightDetails/Actions
(Flashes or illuminates)
Indicates a malfunction in th e PCS (Pre-Collision System)
or that the system is temporarily unavailable due to the
vehicle being extremely hot/cold, or dirt around a front sen-
sor, etc. ( P.208, 378)
Follow the instructions displayed on the multi-informa-
tion display. ( P.208, 378)
If the PCS (Pre-Collision System) or VSC (Vehicle Stability
Control) system is disabled, the PCS warning light will illu-
minate.
P.209
Page 370 of 460

3707-2. Steps to take in an emergency
LEXUS NX300h Owners Manu-
al_USA_M78287_en
■LDA indicator
■PKSB OFF indicator (warning buzzer)
■Slip indicator light
■Brake hold operated indicator
Warning lightDetails/Actions
(Orange)
Indicates a malfunction in the LDA (Lane Departure Alert
with steering control)
When “Lane Departure Alert Unavailable” is dis-
played on the multi-information display, turn the LDA
system off, drive the vehicle for a short time, and then
turn the LDA system back on. ( P.211)
When a message other than above is displayed, follow
the instructions displayed in the message.
Warning lightDetails/Actions
(Flashes)
When a buzzer sounds: Indicates a malfunction in the PKSB
(Parking Support Brake) system
Have the vehicle inspected by your Lexus dealer
immediately.
When a buzzer does not sound:
Indicates that the system is temporarily unavailable, possi-
bly due to a sensor being dirty or covered with ice, etc.
Clear the dirt, etc.
Warning lightDetails/Actions
Indicates a malfunction in:
The VSC system;
The TRAC system; or
The hill-start assist control system
The light will flash when the ABS, VSC or TRAC system is
operating.
Have the vehicle inspected by your Lexus dealer
immediately.
Warning lightDetails/Actions
(Flashes)
Indicates a malfunction in the brake hold system
Have the vehicle inspected by your Lexus dealer
immediately.