Page 340 of 620
3385-3. Using the air conditioning system and defogger
LS600hL_U(OM50E41U)
■Option control screenCooling and dehumidification
function on/off
4-ZONE mode on/off
Micro dust and pollen filter on/
off
Air purifier and rear air condi-
tioning function on/off
■Operation screen (“Side Display”)Fan speed control
Right-hand front seat side air
outlet selector
Right-hand front seat side tem-
perature control
Right-hand front seat side tem-
perature display
4-ZONE mode on/off
Automatic mode
Cooling and dehumidification
function on/off
Left-hand front seat side tem-
perature control
Left-hand front seat side tem-
perature display
Left-hand front seat side air
outlet selector
1
2
3
4
1
2
3
4
5
6
7
8
9
10
Page 351 of 620

3495-3. Using the air conditioning system and defogger
5
Interior features
LS600hL_U(OM50E41U)
■When the outside temperature exceeds 75°F (24°C) and the air conditioning sys-
tem is on
●In order to reduce the air conditioning power consumption, the air conditioning
system may switch to recirculated air mode automatically. This may also reduce
fuel consumption.
●Recirculated air mode is selected as a default mode when the power switch is
turned on.
●It is possible to switch to outside air mode at any time by pressing .
■When the hybrid battery cooling system operates
●If the hybrid battery cooling system operat es when the air conditioning is off, a
message will be shown on the multi-information display and the air conditioning will
automatically turn on. ( P. 105)
●The sound of the air flow may change when cool air flows from the rear roof vents
or the air purifier is in operation. This occurs when the hybrid battery is being
cooled and does not indicate a malfunction.
■Automatic mode for air intake control
In automatic mode, the system detects ex haust gas and other pollutants and auto-
matically switches between outside air and recirculated air modes.
When the dehumidification function is off, and the fan is operating, turning automatic
mode on will activate the dehumidification function.
■Micro dust an d pollen filter
●In order to prevent the windshield from fogging up when the outside air is cold, the
following may occur:
• Outside air mode does not switch to (recirculated air) mode.
• The dehumidification function operates.
• The operation cancels after approximately 1 minute.
●In rainy weather, the windows may fog up. Press .
●In extremely humid weather, the windows may fog up.
●The pollens are filtered out even if the mi cro dust and pollen filter is turned off.
■Air purifier
The air purifier will turn on when turn ing the rear air conditioning system on.
■When the outside temperature falls to nearly 32 F (0C)
The dehumidification function may not operate even when “A/C” is selected.
Page 353 of 620
3515-3. Using the air conditioning system and defogger
5
Interior features
LS600hL_U(OM50E41U)
Rear air conditioning system
Air outlets and fan speed are automatica lly adjusted according to the
temperature setting.
Left-hand rear seat side tem-
perature control
Left-hand rear seat side air out-
let selector
Automatic mode
Off
Fan speed control
Right-hand rear seat side air
outlet selector
Right-hand rear seat side tem-
perature control Right-hand rear seat side tem-
perature display
Right-hand rear seat side air
flow display
Fan speed display
Left-hand rear seat side air flow
display
Left-hand rear seat side tem-
perature display
Button lock display1
2
3
4
5
6
7
8
9
10
11
12
13
Page 354 of 620

3525-3. Using the air conditioning system and defogger
LS600hL_U(OM50E41U)
Press the “AUTO” button.
The air conditioning system will operate, and air outlets and fan speed will be
adjusted automatically.
“AUTO” will be displayed on the control panel.
Press “ ” on “TEMP” to increase the temperature and “ ” to decrease
the temperature.
The temperature for the right-hand and left-hand seats can be adjusted sepa-
rately.
Air outlets for the right-hand and left-hand seats may be set separately depend-
ing on the temperature setting.
When the rear climate control seats are set to “AUTO” mode, the system is oper-
ated automatically according to the set temperature, outside temperature, etc.
■Adjusting the temperature setting
Press “ ” on “TEMP” to increase the temperature and “ ” to decrease
the temperature.
The temperature for the right-hand and left-hand seats can be adjusted sepa-
rately.
When the rear climate control seats are set to “AUTO” mode, the system is
operated automatically according to the set temperature, outside tempera-
ture, etc.
Using automatic air conditioning system
Adjusting the settings manually
1
2
Page 359 of 620

3575-3. Using the air conditioning system and defogger
5
Interior features
LS600hL_U(OM50E41U)
■Button lock function
To prevent inadvertent operatio n, the buttons on the rear controller for the air condi-
tioning system, rear sunshade, rear door sunshades, and audio system can be
locked.
The rear controller can be locked from the air conditioning operation screen.
( P. 345)
■Rear control panel illumination off function
Control panel illumination on the re ar controller can be turned off.
■Replacing the rear air conditioning filter
Replacing the air conditioning filter when using rear air conditioning or air purifier
reduces air flow or deodorizing performance. ( P. 4 6 9 ) .
Press and hold the “MODE” switch until you
hear a beep to lock the buttons. Pressing the
“MODE” switch again until you hear a beep
will release the lock.
An indicator appears on the display when the
buttons are locked.
NOTICE
■To prevent 12-volt battery discharge
Do not leave the air conditioning system on longer than necessary when the hybrid
system is off.
Press and hold the “PWR” switch until you
hear a beep to turn the illumination off. Press-
ing the “PWR” switch again until you hear a
beep will turn the illumination on.
Page 428 of 620

4266-2. Maintenance
LS600hL_U(OM50E41U)
■Repair and replacement
It is recommended that genuine Lexus parts be used for repairs to ensure perfor-
mance of each system. If non-Lexus parts are used in replacement or if a repair shop
other than a Lexus dealer performs repairs, confirm the warranty coverage.
■Resetting the message indicating maintenance is required (U.S.A. only)
After the required maintenance is perfor med according to the maintenance sched-
ule, please reset the message.
To reset the message, follow the procedure described below:
Switch the display to the trip meter “A” ( P. 101) when the hybrid system is operat-
ing.
Turn the power switch off.
While pressing the trip meter reset switch ( P. 101), turn the power switch to the
ON mode (do not start the hybrid system because otherwise the reset mode will
be canceled).
■Allow inspection and repairs to be performed by a Lexus dealer
●Lexus technicians are well-trained specialist s and are kept up to date with the latest
service information. They are well informed about the operations of all systems on
your vehicle.
●Keep a copy of the repair order. It proves that the maintenance that has been per-
formed is under warranty coverage. If any problem should arise while your vehicle
is under warranty, your Lexus dealer will promptly take care of it. The message shown in the illustration will
appear on the display.
Continue to press and hold the button until
the trip meter displays “COMPLETE”.
1
2
3
Page 451 of 620
4496-3. Do-it-yourself maintenance
6
Maintenance and care
LS600hL_U(OM50E41U)
If any washer does not work or the
warning message appears on the
multi-information display, the
washer tank may be empty. Add
washer fluid.
Wa s h e r f l u i d
CAUTION
■When adding washer fluid
Do not add washer fluid when the hybrid system is hot or operating as washer fluid
contains alcohol and may catch fire if spilled on the engine etc.
NOTICE
■Do not use any fluid other than washer fluid
Do not use soapy water or engine antifreeze instead of washer fluid.
Doing so may cause streaking on the vehicle’s painted surfaces.
■Diluting washer fluid
Dilute washer fluid with water as necessary.
Refer to the freezing temperatures listed on the label of the washer fluid bottle.
Page 457 of 620

4556-3. Do-it-yourself maintenance
6
Maintenance and care
LS600hL_U(OM50E41U)
Your vehicle is equipped with a tire pressure warning system that uses tire
pressure warning valves and transmitters to detect low tire inflation pres-
sure before serious problems arise.
●If the tire pressure drops below a predetermined level, the driver is
warned by a screen display and a warning light. (P. 497, 503)
◆Installing tire pressure warning valves and transmitters
When replacing tires or wheels, tire pressure warning valves and trans-
mitters must also be installed.
When new tire pressure warning valves and transmitters are installed,
new ID codes must be registered in the tire pressure warning computer
and the tire pressure warning system must be initialized. Have tire pres-
sure warning valve and transmitter ID codes registered by your Lexus
dealer. ( P. 4 5 7 )
◆Initializing the tire pressure warning system
■The tire pressure warning system must be initialized in the following
circumstances:
●When rotating the tires.
●When the tire inflation pressure is changed such as when changing
traveling speed.
●When changing the tire size.
When the tire pressure warning system is initialized, the current tire
inflation pressure is set as the benchmark pressure.
Tire pressure warning system
●The tire pressure detected by the tire pressure
warning system can be displayed on the multi-
information display. ( P. 1 0 8 )