2016 LEXUS NX300H air conditioning

4416-1. Using the air conditioning system and defogger
6
Interior features
NX300h_OM_USA_OM78082U
Turns the heated steering wheel on/off
The indicator light comes on when the
heated steering wheel is operating.
■Operation condition
●The heated steering wheel can be used when the power switch is in ON mode.
■Timer
●The heated steering wheel will automati cally turn off after about 30 minutes.
Vehicles without seat ventilators
Each time the switch is pressed, the
operation condition changes as follows.
Hi (3 segments lit)  Mid (2 segments
lit)  Lo (1 segment lit)  Off
The level indicator (amber) light up dur-
ing operation.
Vehicles with seat ventilators
Each time the switch is pressed, the
operation condition changes as follows.
Hi (3 segments lit)  Mid (2 segments
lit)  Lo (1 segment lit)  Off
The indicator (amber) and level indica-
tor (green) light up during operation.
■Operation condition
The seat heaters can be used when the power switch is in ON mode.
Heated steering wheel
Seat heaters
Level
indicator
Level
indicator

4426-1. Using the air conditioning system and defogger
NX300h_OM_USA_OM78082U
Each time the switch is pressed, the
operation condition changes as follows.
Hi (3 segments lit)  Mid (2 segments
lit)  Lo (1 segment lit)  Off
The indicator (green) and level indicator
(green) light up during operation.
■Operation condition
The seat ventilators can be used when the power switch is in ON mode.
Seat ventilators
Level
indicator

483
7Maintenance and care
NX300h_OM_USA_OM78082U
7-1. Maintenance and careCleaning and protecting the vehicle exterior................. 484
Cleaning and protecting the vehicle interior ................. 488
7-2. Maintenance Maintenance requirements.............................. 491
General maintena nce .............. 494
Emission inspection and maintenance (I/M)
programs .....................................497
7-3. Do-it-yourself maintenance Do-it-yourself service precautions ................................ 498
Hood .............................................. 500
Positioning a floor jack .............. 501
Engine compartment ...............502
12-volt battery............................... 512
Tires ................................................... 516
Tire inflation pressure ............... 525
Wheels ........................................... 528
Air conditioning filter ...............530
Electronic key battery .............. 532
Checking and replacing fuses .............................................. 534
Light bulbs.....................................538

4997-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_OM_USA_OM78082U
WA R N I N G
The engine compartment contains many mechanisms and fluids that may move suddenly,
become hot, or become electrically energized. To avoid death or serious injury, observe
the following precautions.
■When working on the engine compartment
●Make sure that the indicator on the power switch and the “READY” indicator are
both off.
●Keep hands, clothing and tools away from the moving fan and engine drive belt.
●Be careful not to touch the engine, power control unit, radiator, exhaust manifold, etc.
right after driving as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily, such as paper and rags, in the engine
compartment.
●Do not smoke, cause sparks or expose an open flame to fuel. Fuel fumes are flamma-
ble.
■When working near the electric cooling fans or radiator grille
Be sure the power switch is off.
With the power switch in ON mode, the electric cooling fans may automatically start to
run if the air conditioning is on and/or the coolant temperature is high. ( P. 5 0 9 )
■Safety glasses
Wear safety glasses to prevent flying or fallin g material, fluid spray, etc. from getting in
your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear due to dirt
in the air.

5097-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_OM_USA_OM78082U
Check the radiator and condenser and clear away any foreign objects.
If either of the above parts is extremely dirty or you are not sure of their condi-
tion, have your vehicle inspected by your Lexus dealer.
WA R N I N G
■When the hybrid system is hot
Do not remove the engine/power control unit coolant reservoir caps.
The cooling system may be under pressure and may spray hot coolant if the cap is
removed, causing serious injuries, such as burns.
NOTICE
■When adding coolant
Coolant is neither plain water nor straight antifreeze. The correct mixture of water and
antifreeze must be used to provide proper lubrication, corrosion protection and cool-
ing. Be sure to read the antifreeze or coolant label.
■If you spill coolant
Be sure to wash it off with water to prevent it from damaging parts or paint.
Radiator and condenser
WA R N I N G
■When the hybrid system is hot
Do not touch the radiator or condenser as they may be hot and cause serious injuries,
such as burns.
■When the electric cooling fans are operating
Do not touch the engine compartment.
With the power switch in ON mode, the electric cooling fans may automatically start to
run if the air conditioning is on and/or the coolant temperature is high. Be sure the
power switch is off when working near the electric cooling fans or radiator grille.

5307-3. Do-it-yourself maintenance
NX300h_OM_USA_OM78082U
Air conditioning filter
Turn the power switch off.
Open the glove box. Slide off the
damper.
Push in the glove box on the vehi-
cle's outer side to disconnect the
claws. Then pull out the glove box
and disconnect the lower claws.
Remove the filter cover.
The air conditioning filter must be changed regularly to maintain air condi-
tioning efficiency.
Removal method
1
2
3
4

5317-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_OM_USA_OM78082U
Remove the air conditioning filter
and replace it with a new one.
The “UP” marks shown on the filter
should be pointing up.
■Checking interval
Inspect and replace the air conditioning filt er according to the maintenance schedule. In
dusty areas or areas with heavy traffic flow, early replacement may be required. (For
scheduled maintenance informat ion, please refer to the “Owner’s Manual Supplement”
or “Scheduled Maintenance”.)
■If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace if necessary.
5
NOTICE
■When using the air conditioning system
Make sure that a filter is always installed.
Using the air conditioning system without a filter may cause damage to the system.

599
8
When trouble arises
8-2. Steps to take in an emergency
NX300h_OM_USA_OM78082U
If your vehicle overheats
■“Engine Coolant Temp High” is shown on the multi-information display Stop the vehicle in a safe place and tu rn off the air conditioning system, and
then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has cooled down sufficiently, inspect the hoses and
radiator core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Lexus
dealer.
The following may indicate that your vehicle is overheating.
●The needle of the engine coolant temperature gauge ( P. 97) enters the
red zone, or a loss of hybrid system po wer is experienced. (For example, the
vehicle speed does not increase.)
●“Engine Coolant Temp High” or “Hybrid System Overheated” is shown on
the multi-information display.
●Steam comes out from under the hood.
Correction procedures
1
2
3
1
2