
2625-3. Using the air conditioning system
■Outside/recirculated air mode
●Setting to the recirculated air mode tem-
porarily is recommended in preventing 
dirty air from entering the vehicle interior 
and helping to cool the vehicle when the 
outside air temperature is high.
●Outside/recirculated air mode may auto-
matically switch de pending on the tem-
perature setting or the inside 
temperature.
■Registering air condit ioning settings to 
electronic keys
●Unlocking the vehicle using an electronic 
key and turning the engine switch 
conditioning settings.
●When the engine switch 
is turned off, the current air conditioning 
settings will automatically be registered 
to the electronic key that was used to 
unlock the vehicle.
●The system may not operate correctly if 
more than one electr onic key is in the 
vicinity or if the smart access system with 
push-button start is used to unlock the 
passenger door.
●The doors that can recall the air condi-
tioning setting* when unlocked using the 
smart access system with push-button 
start can be changed. For details, contact 
your Lexus dealer.
*: The doors that can recall the driving posi-
tion memory are changed at the same 
time.
■Operation of the air conditioning sys-
tem in Eco drive mode
In Eco drive mode, the air conditioning sys-
tem is controlled as follows to prioritize fuel 
efficiency:
●Engine speed and compressor operation 
controlled to restri ct heating/cooling 
capacity
●Fan speed restricted when automatic 
mode is selected
To improve air condit ioning performance, 
perform the following operations:
●Turn off eco air conditioning mode  (
 P.263)
●Adjust the fan speed
●Turn off Eco drive mode ( P.224)
■When the outside temperature falls to 
nearly 32°F (0°C)
The dehumidification function may not 
operate even when “A/C” is selected.
■Ventilation and air conditioning odors
●To let fresh air in, set the air conditioning 
system to the outside air mode.
●During use, various odors from inside and 
outside the vehicle may enter into and 
accumulate in the air conditioning sys-
tem. This may then cause odor to be 
emitted from the vents.
●To reduce potential odors from occur-
ring:
• It is recommended that the air condition- ing 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 pe riod of time imme-
diately after the air conditioning system is 
started in automatic mode or with the 
micro dust and pollen filter on.
●When parking, the system automatically 
switches to fresh air intake mode to 
encourage better air circulation through-
out the vehicle, helping to reduce odors 
that occur when starting the vehicle.
■Using the voice command system
Air conditioning system can be operated 
using voice commands. For details, refer to 
the “NAVIGATION SYSTEM OWNER’S 
MANUAL”.
■Air conditioning filter
 P.328
■Air conditioning system refrigerant
●A label regarding the refrigerant of the 
air conditioning system is attached to the 
hood at the location shown in the follow-
ing illustration. 

3607-2. Steps to take in an emergency
• “Shift system malfunction”
• “P switch malfunction”
• “Shift system unavailable”
●If any of the following messages is shown on the multi-information display, it may indicate 
a malfunction in a system or part. Immediatel y have the vehicle inspected by your Lexus 
dealer.
• “Hybrid System Malfunction” (LC500h)
•“Check Engine”
•“Hybrid Battery System  Malfunction” (LC500h)
• “Accelerator System Malfunction”
●If any of the following messages is shown on  the multi-information display, the vehicle may 
have run out of fuel. Stop the vehicle in a safe place and, if the fuel level is low, refuel the 
vehicle. ( P.65)
• “Hybrid system stopped” (LC500h)
• “Engine stopped”(LC500h)
●If any of the following messages is shown on the multi-information di splay, it may indicate 
a malfunction. Immediately stop the vehicle and contact your Lexus dealer.
• “Braking Power Low”
• “Charging System Malfunction”
• “Oil Pressure Low”
●If “Aux Battery Low” is shown,  observe the following. (LC500h)
• If the message disappears in a few minutes*
Keep the hybrid system operating for more than approximately 15 minutes to charge the 
12-volt battery.
• If the message does not disappear Refer to “If the 12-volt battery is discharged” ( P.369) to start the hybrid system
*: It is displayed for approximately 6 seconds.
●If “Battery low” is shown, the 12-volt battery  charge is insufficient. Recharge or replace the 
12-volt battery.
●If “Maintenance Required for Traction battery  Cooling Parts” is shown, the filters may be 
clogged, the air intake vents may be blocked,  or there may be a gap in the duct. There-
fore, perform the following correction procedure. (LC500h)
• If the air intake vents and filters of the hybrid battery (traction battery) are dirty, perform  the procedure on P.291 to clean them.
• If the warning message is shown  when the air intake vents and filters of the hybrid battery 
(traction battery) are not dirty, have th e vehicle inspected by your Lexus dealer.
■If a message that indicates the need fo r visiting your Lexus dealer is shown
The system or part shown on the multi-information display is malfunctioning. Have the vehi-
cle inspected by your Lexus dealer immediately.
■Warning buzzer
In some cases, the buzzer may not be heard du e to being in a noisy location or audio sound.
NOTICE
■While the engine oil level warning message is displayed
Continued engine operation with low  engine oil will damage the engine. 

435Alphabetical index
Alphabetical index
A
A/C ................................................................... 260Air conditioning filter ............................... 328
Automatic air conditioning system ...260
Micro dust and pollen filter................... 265
ABS (Anti-lock Brake System).............. 243 Function .......................................................... 243
Warning light ...............................................348
ACA (Active Cornering Assist) ........... 243
Active Cornering Assist (ACA) ........... 243
Active rear wing........................................... 240
Adaptive Variable Suspension System .......................................................................... 243
Airbags ............................................................... 28 Airbag operating conditions................... 30
Airbag precautions for  your child ........ 33
Correct driving posture .............................23
Curtain shield airbag operating condi- tions .................................................................... 31
Curtain shield airbag  precautions ....... 33
Front passenger occupant classification  system ............................................................. 39
General airbag precautions ................... 33
Locations of airbags.................................... 28
Modification and disposal of airbags . 35
Side airbag operating conditions ........... 31
Side airbag precautions ............................ 33
Side and curtain shield airbags operating  conditions........................................................ 31
Side and curtain shield airbags precau- tions .................................................................. 33
SRS airbags ..................................................... 28
SRS warning light ......................................348
Air conditioning filter ................................. 328
Air conditioning system ............................ 260 Air conditioning filter ............................... 328
Automatic air conditioning system ...260
Micro dust and pollen filter................... 265
Alarm ....................................................................72 Alarm ...................................................................72
Warning buzzer ......................................... 347 Anchor brackets ..................................... 45, 53
Antennas (smart access 
system with push-
button start) ................................................... 117
Anti-lock Brake System (ABS).............. 243 Function .......................................................... 243
Warning light .............................................. 348
Approach warning...................................... 220
Automatic headlight leveling system ....182
Automatic High Beam ............................... 184
Automatic light control system................. 181
Automatic transmission ..............................162 M mode ........................................................... 168
Paddle shift switches .......................167, 168
Snow mode.................................................... 166
Auxiliary net................................................... 273
Average fuel economy................................. 88
Average vehicle speed ................................ 88
B
Back-up lights Replacing light bulbs ................................336
Battery (12-volt battery) .. ............................ 311
Battery checking ........................................... 311
If the 12-volt battery is discharged ... 369
Preparing and checking before winter ......................................................................... 250
Replacing ....................................................... 374
Warning light ............................................... 347
Battery (traction batter y) ............................ 65
Blind Spot Monitor (BSM).........................231 Blind Spot Monitor function .................235
Rear Cross Traffic Alert function ....... 237
Brake Brake hold .......................................................179
Fluid...................................................................392
Parking brake ................................................176
Regenerative braking ................................. 63
Warning light .................................... 347, 351
Warning message .....................................357
Brake assist .................................................... 243
Break-in tips.....................................................143
Brightness control