2015 LEXUS NX300h fuel cap

438 6-1. Using the air conditioning system and defogger
NX300h_U_OM78007U ■
Fogging up of the windows ●
The windows will easily fog up when the humidity in the vehicle is high. Pressing “A/C”
button or selecting “A/C” will dehumidify th e air from the outlets and defog the wind-
shield effectively. ●
If you turn “A/C” off, the windows may fog up more easily. ●
The windows may fog up if the recirculated air mode is used. ■
Windshield fog detection function
When automatic mode is set, the humidity sensor (  P. 4 3 9 ) d e t e c t s f o g o n t h e w i n d -
shield and controls the air conditioning system to prevent fog. ■
Outside/recirculated air mode ●
When driving on dusty roads such as tunnels or in heavy traffic, set to
the recirculated air mode. This is effective in preventing outside air from entering the
vehicle interior. During cooling operation, setting the recirculated air mode will also
cool the vehicle interior effectively. ●
Outside/recirculated air mode may automati cally switch depending on the tempera-
ture setting or the inside temperature. ■
When the outside temperature is low
The dehumidification function may not operat e even when “A/C” is pressed or “A/C” is
selected. ■
Operation of the air conditioning system in Eco drive mode ●
In the Eco drive mode, the air conditioning sy stem is controlled as follows to prioritize
fuel efficiency
• Engine speed and compressor operation controlled to restrict heating/cooling
capacity
• Fan speed restricted when automatic mode is selected ●
To improve air conditioning performa nce, perform the following operations
• Adjust the fan speed
• Turn off Eco drive mode ■
Ventilation and air conditioning odors ●
To let fresh air in, set the air conditio ning system to the outside air mode.●
During use, various odors from inside and outside the vehicle may enter into and accu-
mulate in the air conditioning system. This may then cause odor to be emitted from the
vents. ●
To reduce potential odors from occurring:
• It is recommended that the air conditioning system be set to outside air mode prior
to turning the vehicle off.
• The start timing of the blower may be dela yed for a short period of time immediately
after the air conditioning system is started in automatic mode.■
Air conditioning filter
 P. 5 3 0 ■
Customization
Settings (e.g. A/C automatic mode switch operation) can be changed.
(Customizable features:  P. 6 3 9 )

4977-2. Maintenance
7
Maintenance and care
NX300h_U_OM78007UEmission inspection and maintenance (I/M) programsThe OBD system determines that a problem exists somewhere in the emission
control system. Your vehicle may not pa ss the I/M test and may need to be
repaired. Contact your Lexus dealer to service the vehicle. ●
When the 12-volt battery is disconnected or discharged
Readiness codes that are set during ordinary driving are erased.
Also, depending on your driving habits, the readiness codes may not be com-
pletely set. ●
When the fuel tank cap is loose
The malfunction indicator lamp comes on indicating a temporary malfunction
and your vehicle may not pass the I/M test.
The error code in the OBD system will not be cleared unless the vehicle is driven
40 or more times.
Contact your Lexus dealer to prepare the vehicle for re-testing.Some states have vehicle emission inspection programs which include OBD
(On Board Diagnostics) checks. The OBD system monitors the operation of
the emission control system.
If the malfunction indicator lamp comes on
Your vehicle may not pass the I/M test in the following situations:
When the malfunction indicator lamp s till remains on af ter several driv-
ing trips
If your vehicle does not pass the I/M test

526 7-3. Do-it-yourself maintenance
NX300h_U_OM78007U Tire valve
Tire pressure gauge
Remove the tire valve cap.
Press the tip of the tire pressure gauge onto the tire valve.
Read the pressure using the gauge gradations.
If the tire inflation pressure is not at the recommended level, adjust the pres-
sure.
If you add too much air, press the center of the valve to deflate.
After completing the tire inflation pressure measurement and adjustment,
apply soapy water to the valve and check for leakage.
Put the tire valve cap back on. ■
Tire inflation pressure check interval
You should check tire inflation pressure ev ery two weeks, or at least once a month.
Do not forget to check the spare. ■
Effects of incorrect tire inflation pressure
Driving with incorrect tire inflation pressure may result in the following: ●
Reduced fuel economy ●
Reduced driving comfort and poor handling ●
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.Inspection and adjustment procedure 1
2
1
2
3
4
5
6

568 8-2. Steps to take in an emergency
NX300h_U_OM78007U * 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 be lt 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 pr etensioner, 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 warning 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.

608 9-1. Specifications
NX300h_U_OM78007UMaintenance data (fuel, oil level, etc.)
* 1
: Unladen vehicle
* 2
: Vehicles with towing packageDimensions and weight Overall length 182.3 in. (4630 mm)
Overall width 72.6 in. (1845 mm)
Overall height
* 1
64.8 in. (1645 mm)
Wheelbase 104.7 in. (2660 mm)
Tr e a d Front 62.2 in. (1580 mm)
Rear 62.2 in. (1580 mm)
Vehicle capacity weight
(Occupants + luggage) 895 lb. (405 kg)
Trailer Weight Rating
* 2

(Trailer weight + cargo weight) 1500 lb. (685 kg)

610 9-1. Specifications
NX300h_U_OM78007U ■
Engine number
The engine number is stamped on
the engine block as shown.

Front 
Rear (AWD models)Engine Model 2.5 L 4-cylinder (2AR-FXE)
Ty p e 4-cylinder in line, 4-cycle, gasoline
Bore and stroke 3.54  3.86 in. (90.0  98.0 mm)
Displacement 152.2 cu.in. (2494 cm 3
)
Valve clearance (engine cold) Automatic adjustment
Drive belt tension Automatic adjustment
Fuel Fuel type Unleaded gasoline only
Octane Rating 87 (Research Octane Number 91) or higher
Fuel tank capacity (Reference) 14.8 gal. (56 L, 12.3 Imp.gal.)
Electric motor (traction motor) Ty p e Permanent magnet synchronous motor
Maximum output 105 kW
Maximum torque 199 ft•lbf (270 N•m, 27.5 kgf•m)
Ty p e Permanent magnet synchronous motor
Maximum output 50 kW
Maximum torque 103 ft•lbf (139 N•m, 14.2 kgf•m)

6279-1. Specifications
9
Vehicle specifications
NX300h_U_OM78007U Glossary of tire terminology Tire related term Meaning
Cold tire inflation pressure Tire pressure when the vehicle has been parked for
three hours or more, or has not been driven more than 1
mile or 1.5 km un der that condition
Maximum inflation pres-
sure The maximum cold inflated pressure to which a tire may
be inflated, shown on the sidewall of the tire
Recommended inflation
pressure Cold tire inflation pressure recommended by a manu-
facturer
Accessory weight The combined weight (in excess of those standard items
which may be replaced) of transmission, power steer-
ing, power brakes, power wi ndows, power seats, radio
and heater, to the extent that these items are available as
factory-installed equipment (whether installed or not)
Curb weight The weight of a motor vehicle with standard equipment,
including the maximum capacity of fuel, oil and coolant,
and if so equipped, air co nditioning and additional
weight optional engine
Maximum loaded vehicle
weight The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight 150 lb. (68 kg) times the numb er of occupa nts specified
in the second column of Table 1
* that follows
Occupant distribution Distribution of occupants in a vehicle as specified in the
third column of Table 1
* below

668 Alphabetical index
NX300h_U_OM78007U Flat tire ...................................................... 575
Floor mats ................................................... 28
Fluid
Brake ......................................................... 614
Transmission.......................................... 614
Washer ...................................................... 511
Fog lights
Replacing light bulbs ....................... 552
Switch....................................................... 227
Front passenger occupant
classification system ............................ 53
Front passenger’s seat belt
reminder light ..................................... 567
Front seats .................................................146
Adjustment ............................................. 146
Cleaning ................................................ 488
Correct driving posture ....................30
Driving position memory ................ 154
Head restraints ..................................... 158
Power easy access system ............ 154
Seat heaters ......................................... 440
Seat position memory....................... 154
Front side marker lights
Light switch ............................................ 219
Replacing light bulbs ........... 545, 552
Wattage ....................................................617 Front turn signal lights
Replacing light bulbs .......................545
Turn signal lever ................................... 212
Wattage ................................................... 617
Fuel
Capacity.................................................. 610
Fuel gauge ................................................97
Gas station information................. 680
Information............................................. 618
Refueling ................................................ 236
Type........................................................... 610
Fuel filler door.........................................236
Refueling ................................................ 236
When the fuel filler door
cannot be opened ......................... 238
Fuses.......................................................... 534
Garage door opener........................... 467
Gas station information ..................... 680
Gauges......................................................... 97
Glove box ................................................ 447
Grocery bag hooks............................... 451F
G