2013 Lexus IS300h Air conditioning

4086-1. Using the air conditioning system
IS300h_EE(OM53B95E)
Air conditioning odors
During use, various odors from inside and outside the vehicle may enter into
and accumulate 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 delayed for a short period of time
immediately after the air conditioning system is started in automatic mode.
Air conditioning filter
P. 470
Customization
Settings (e.g. A/C Auto switch operation) can be changed.
(Customizable features P. 582)
CAUTION
To prevent the windshield from fogging up
Do not use during cool air operation in extremely humid weather. The
difference between the temperature of the outside air and that of the wind-
shield can cause the outer surface of the windshield to fog up, blocking your
vision.
To prevent burns
Do not touch the rear view mirror surfaces when the outside rear view mirror
defoggers are on.
Do not touch the glass at lower part of the windshield or to the side of the
front pillars when the windshield wiper de-icer is on.
NOTICE
To prevent 12-volt battery discharge
Do not leave the air conditioning system on longer than necessary when the
hybrid system is off.
Do not place anything on the instrument
panel which may cover the air outlets.
Otherwise, air flow may be obstructed,
preventing the windshield defoggers from
defogging.

4096-1. Using the air conditioning system
6
Interior features
IS300h_EE(OM53B95E)
Turn the heated steering wheel on/
off
The indicator light comes on when
the heated steering wheel is operat-
ing.
Heated steering wheel/seat heaters/seat ventilators

: If equipped
Heated steering wheel and seat heaters heat the side grips of the steering
wheel and seats, respectively. Seat ventilators maintain good airflow by
blowing air from the seats.
CAUTION
Care should be taken to prevent injury if anyone in the following categories
comes in contact with the steering wheel and seats when the heater is on:
• Babies, small children, the elderly, the sick and the physically challenged
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping drugs,
cold remedies, etc.)
Observe the following precautions to prevent minor burns or overheating,
• Do not cover the seat with a blanket or cushion when using the seat heater.
• Do not use seat heater more than necessary.
NOTICE
Do not put heavy objects that have an uneven surface on the seat and do not
stick sharp objects (needles, nails, etc.) into the seat.
To prevent 12-volt battery discharge, do not use the functions when the hybrid
system is off.
Heated steering wheel

4106-1. Using the air conditioning system
IS300h_EE(OM53B95E)
The heated steering wheel can be used when the power switch is in ON mode.
The heated steering wheel will automatically turn off after about 30 minutes.
Each time the switch is pressed, the
intensity of the seat heater changes
and the level indicator lights
(amber) light as follows:
Hi (3 segments lit)  Mid (2 seg-
ments lit)  Lo (1 segment lit) 
Off
The seat heaters can be used when the power switch is in ON mode.
Seat heater timer control: The seat heater automatically switches from
HiMidLo. The switching timing differs depending on the temperature
inside the cabin etc. when the seat heater was operated.
The seat heater timer control can be turned on and off by pressing the seat
heater switches for the driver side and front passenger side at the same time
until a buzzer sounds. The buzzer will beep once when the seat heater timer
control is turned on and twice when it is turned off.
Each time the switch is pressed, the
intensity of the seat ventilator
changes and the level indicator
lights (green) light as follows:
Hi (3 segments lit)  Mid (2 seg-
ments lit)  Lo (1 segment lit) 
Off
The seat ventilators can be used when the power switch is in ON mode.
Seat heaters
Ty p e A Ty p e B
Seat ventilators

425
7Maintenance and care
IS300h_EE(OM53B95E)
7-1. Maintenance and care
Cleaning and protecting
the vehicle exterior ......... 426
Cleaning and protecting
the vehicle interior .......... 430
7-2. Maintenance
Maintenance
requirements ................... 433
7-3. Do-it-yourself
maintenance
Do-it-yourself service
precautions...................... 435
Hood ................................. 437
Positioning a floor jack ..... 438
Engine compartment ......... 439
12-volt battery................... 447
Tires .................................. 450
Replacing the tire .............. 460
Tire inflation pressure ....... 466
Wheels .............................. 468
Air conditioning filter ....... 470
Electronic key battery ....... 472
Checking and replacing
fuses ................................ 475
Light bulbs ........................ 479

4367-3. Do-it-yourself maintenance
IS300h_EE(OM53B95E)
CAUTION
The engine compartment contains many mechanisms and fluids that may move
suddenly, become hot, or become electrically energized. To avoid death or seri-
ous injury, observe the following precautions.
When working on the engine compartment
Make sure that the “ACCESSORY” or “IGNITION ON” on the multi-infor-
mation display 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 mani-
fold, 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
flammable.
Take care because brake fluid can harm your hands or eyes and damage
painted surfaces. If fluid gets on your hands or in your eyes, flush the affected
area with clean water immediately.
If you still experience discomfort, consult a doctor.
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 automati-
cally start to run if the air conditioning is on and/or the coolant temperature is
high. (P. 446)
Safety glasses
Wear safety glasses to prevent flying or falling 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.
If the fluid level is low or high
It is normal for the brake fluid level to go down slightly as the brake pads wear
or when the fluid level in the accumulator is high.
If the reservoir needs frequent refilling, it may indicate a serious problem.

4707-3. Do-it-yourself maintenance
IS300h_EE(OM53B95E)
Turn the power switch off.
Open the glove box. Lift up the
side with the stay, disconnect the
stay tabs and remove the partition
by pulling horizontally.
Press the tabs and remove the fil-
ter cover.
Press the tabs and remove the fil-
ter case.
Air conditioning filter
The air conditioning filter must be changed regularly to maintain air con-
ditioning efficiency.
Removal method
1
2
3
4

4717-3. Do-it-yourself maintenance
7
Maintenance and care
IS300h_EE(OM53B95E)
Remove the air conditioning fil-
ter from the filter case and
replace it with a new one.
The “UP” marks shown on the fil-
ter and the filter case should be
pointing up.
Checking interval
Inspect and replace the air conditioning filter according to the maintenance
schedule. In dusty areas or areas with heavy traffic flow, early replacement may
be required. (For scheduled maintenance information, please refer to the “Lexus
Service Booklet” or “Lexus Warranty Booklet”.)
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 sys-
tem.

5068-2. Steps to take in an emergency
IS300h_EE(OM53B95E)
Fluid leaks under the vehicle.
(Water dripping from the air conditioning after use is normal.)
Flat-looking tires or uneven tire wear
Engine coolant temperature gauge needle continually points higher
than normal.
Changes in exhaust sound
Excessive tire squeal when cornering
Strange noises related to the suspension system
Pinging or other noises related to the hybrid system
Engine missing, stumbling or running roughly
Appreciable loss of power
Vehicle pulls heavily to one side when braking
Vehicle pulls heavily to one side when driving on a level road
Loss of brake effectiveness, spongy feeling, pedal almost touches the
floor
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably
needs adjustment or repair. Contact any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional as soon as
possible.
Visible symptoms
Audible symptoms
Operational symptoms