2018 LEXUS LS500 air conditioning

4036-3. Do-it-yourself maintenance
LS500_OM_OM50F54U_(U) 6
Maintenance and care filter.
■
If the electronic key battery is depleted
The following symptoms may occur: ●
The smart access system with push-but-
ton start and wireless remote control will
not function properly. ●
The operationa l range will be reduced.■
When the card key battery needs to be
replaced (if equipped)
The battery for the card key is available only
at Lexus dealers. Your Lexus dealer can
replace the battery for you.
 Flathead screwdriver
 Small flathead screwdriver
 Lithium battery CR2032 ■
Use a CR2032 lithium battery ●
Batteries can be purchased at your Lexus
dealer, local electrical appliance shops or
camera stores.
●
Replace only with the same or equivalent
type recommended by the manufacturer.
●
Dispose of used batteries according to
local laws.NOTICE■
When using the air conditioning sys-
tem
Make sure that a filter is always installed.
Using the air conditioning system without
a filter may cause damage to the system. ■
To prevent damage to the filter cover
When moving the filter cover in the
direction of arrow to release the fitting,
pay attention not to apply excessive force
to the claws. Otherwise, the claws may
be damaged. Electronic key battery Replace the battery with a new one
if it is depleted.
As the key may be damaged if the
following procedure is not per-
formed properly, it is recom-
mended that key battery
replacement be performed by your
Lexus dealer.
Items to prepare

4437-2. Steps to take in an emergency
LS500_OM_OM50F54U_(U) 7
When trouble arises
1 Stop the vehicle in a safe place and
turn off the air conditioning system,
and then stop the engine.
2 If you see steam:
Carefully lift the hood after the
steam subsides.
If you do not see steam:
Carefully lift the hood.
3 After the engine has cooled down
sufficiently, inspect the hoses and radiator core (radiator) for any
leaks.
Radiators
Cooling fan If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
4 The coolant level is satisfactory if it
is between the “F” and “L” lines on
the reservoir.
 Engine
Reservoir
“F” line
“L” line
Coolant inlet cap
 IntercoolerIf your vehicle overheats The following may indicate that
your vehicle is overheating.
 The engine coolant temperature
gauge ( → P.69, 72) is in the red
zone or a loss of engine power is
experienced. (For example, the
vehicle speed does not increase.)
 “Engine Coolant Temp High Stop
in a Safe Place See Owner’s
Manual” is shown on the
multi-information display.
 Steam comes out from under the
hood.
Correction procedures A
B
A
B
C
D

444 7-2. Steps to take in an emergency
LS500_OM_OM50F54U_(U) Reservoir
“F” line
“L” line
5 Add coolant if necessary.Water can be used in an emergency if
coolant is unavailable.
 Engine →
P.444
 Intercooler Remove the engine compartment cover
and add coolant. 6 Start the engine and turn the air
conditioning system on to check
that the radiator cooling fan oper-
ates and to check for coolant leaks
from the radiator or hoses. The fan operates when the air conditioning
system is turned on immediately after a
cold start. Confirm that the fan is operating
by checking the fan sound and air flow. If it
is difficult to check these, turn the air con-
ditioning system on and off repeatedly.
(The fan may not oper ate in freezing tem-
peratures.)
7 If the fan is not operating:
Stop the engine immediately and
contact your Lexus dealer.
If the fan is operating:
Have the vehicle inspected at the
nearest Lexus dealer. ■
When adding engine coolant
Add coolant in accordance with the follow-
ing procedure.
1 Remove the engine compartment
cover.A
B
C

4638-1. Specifications
LS500_OM_OM50F54U_(U) 8
Vehicle specifications Curb weight The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil
and coolant, and if so equipped, air conditioning
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 number of occupants
specified in the second column of Table 1 *
that fol-
lows
Occupant distribution Distribution of occupants in a vehicle as specified in
the third column of Table 1 *
below
Production options weight The combined weight of installed regular produc-
tion options weighing over 5 lb. (2.3 kg) in excess of
the standard items which they replace, not previ-
ously considered in curb weight or accessory
weight, including heavy duty brakes, ride levelers,
roof rack, heavy duty battery, and special trim
Rim A metal support for a tire or a tire and tube assem-
bly upon which the tire beads are seated
Rim diameter (Wheel diameter) Nominal diameter of the bead seat
Rim size designation Rim diameter and width
Rim type designation The industry manufacturer’s designation for a rim
by style or code
Rim width Nominal distance between rim flanges
Vehicle capacity weight (Total load
capacity) The rated cargo and luggage load plus 150 lb. (68
kg) times the vehicle’s de signated seating capacity
Vehicle maximum load on the tire The load on an individual ti re that is determined by
distributing to each axle its share of the maximum
loaded vehicle weight, and dividing by twoTire related term Meaning

4798-2. Customization
LS500_OM_OM50F54U_(U) 8
Vehicle specifications ■
Driving mode select switch ( → P.289)*
:If equipped ■
Electronically modulated air suspension *
( → P.291)*
:If equipped ■
Automatic air conditioning system ( → P.313)
■
Seat heater/seat ventilators *
( → P.326)Function Default setting Customized set-
ting
Powertrain control in custom
mode *
Normal Power
O — — —
Eco
Chassis control in custom
mode *
Normal Sport
O — — —
Comfort
Air conditioning operation in
custom mode *
Normal Eco O — — —
Function Default setting Customized set-
ting
Vehicle height control On Off — O — —
Ingress/egress height control
function On Off — O — —
Vehicle height when parked Normal High — O — —
Function Default setting Customized set-
ting
A/C auto switch operation On Off O — — O
Exhaust gas sensor sensitivity Standard -3 to 3 O — — O
Function Default setting Customized set-
ting
Driver’s seat temperature
preference in automatic
mode Standard -2 (cooler) to 2
(warmer) O — — O
Passenger’s seat tempera-
ture preference in automatic
mode Standard -2 (cooler) to 2
(warmer) O — — O A B C D
A B C D
A B C D
A B C D

4971-1. What to do if... (Troubleshooting)
LS500_OM_OM50F54U_(U) 497Alphabetical Index
Alphabetical Index A
A/C
Air conditioning filter ............................... 402
Front automatic air conditioning system
...........................................................................313
Micro dust and pollen filter.....................319
Rear air conditioning system ............... 323
ABS (Anti-lock Brake System).............. 294
Warning light ............................................... 420
Active stabilizer suspension system .... 294
Adaptive Front-lighting System (AFS) . 177
Adaptive Variable Suspension System295
AFS (Adaptive Front-lighting System) . 177
Air conditioning filter ................................. 402
Air conditioning system
Air conditioning filter ............................... 402
Front automatic air conditioning system
...........................................................................313
Micro dust and pollen filter.....................319
Rear air conditioning system ............... 323
Airbags
Airbag operating conditions..................... 31
Airbag precautions for your child ........ 34
Correct driving posture .............................23
Curtain shield airbag operating condi-
tions .................................................................... 31
Curtain shield airbag precautions ....... 34
Front passenger occupa nt classification
system ............................................................. 40
General airbag precautions ................... 34
Locations of airbags.................................... 29
Modification and disposal of airbags ..37
Side airbag operating conditions ........... 31
Side airbag precautions ............................ 34
Side and curtain shield airbags operating
conditions........................................................ 31
Side and curtain shield airbags precau-
tions .................................................................. 34
SRS airbags ..................................................... 29
SRS warning light ........................................419 Alarm
Alarm...................................................................60
Warning buzzer .......................................... 418
Anchor brackets ..................................... 46, 55
Antennas (smart acc ess system with
push-button start).......................................107
Anti-lock Brake System (ABS).............. 294
Warning light ...............................................420
Approach warning.......................................247
Armrest............................................................ 343
Assist grips ..................................................... 343
Audio system-linked display ........................81
Automatic headlight leveling system .... 176
Automatic High Beam ................................178
Automatic light control system................ 175
Automatic transmission ..............................163
M mode ........................................................... 168
Paddle shift switches .......................167, 168
Snow mode.....................................................167
Auxiliary boxes ................................. 338, 340
Average fuel economy................................. 78
Average vehicle speed ................................ 78
B
Back-up lights
Replacing light bulbs ............................... 408
Battery
Battery checking ....................................... 384
If the battery is discharged ................... 438
Preparing and checking before winter
..........................................................................299
Warning light ................................................ 419
Blind Spot Monitor (BSM).........................251
Boost gauge.......................................................79
Brake
Brake hold .......................................................173
Fluid...................................................................453
Parking brake ............................................... 170
Warning light ................................................ 418
Brake assist .................................................... 294
Break-in tips...................................................... 151

500 Alphabetical Index
LS500_OM_OM50F54U_(U) If the engine will not start ....................... 433
If the fuel filler door cannot be opened
......................................................................... 435
If you have a flat tire .................................. 432
If you lose your keys................................. 435
If you think something is wrong ...........416
If your vehicle becomes stuck............. 446
If your vehicle has to be stopped in an
emergency ................................................. 410
If your vehicle needs to be towed ....... 412
If your vehicle overheats ........................ 443
Engine
ACCESSORY mode ............................... 162
Compartment ..............................................377
Engine compartment cover ................. 378
Engine switch................................................ 160
Fuel pump shut off system ...................... 417
Hood................................................................ 375
How to start the engine........................... 160
Identification number ............................... 449
If the engine will not start ....................... 433
If your vehicle has to be stopped in an
emergency ................................................. 410
Ignition switch (engine switch) ............ 160
Overheating................................................. 443
Tachometer .............................................69, 72
Engine compartment cover .................... 378
Engine coolant
Capacity ...........................................................451
Checking ........................................................ 381
Preparing and checking before winter
......................................................................... 299
Engine coolant temperature gauge 69, 72
Engine immobilizer system ........................ 58
Engine oil
Capacity .........................................................450
Checking ....................................................... 379
Preparing and checking before winter
......................................................................... 299
Warning light .................................................419
Engine oil maintenance data ................... 381 Engine switch ................................................. 160
Auto power off function............................162
Changing the engine switch modes ..162
If your vehicle has to be stopped in an
emergency .................................................. 410
EPS (Electric Power Steering) .............. 294
Warning light .................................................421
Event data recorder (E DR) ............................7 F
FCTA (Front Cross Traffic Alert) ...........218
First-aid kit storage belt ............................ 340
Flat tire
Tire pressure warning system ............ 388
Floor mats ...........................................................22
Fluid
Automatic transmission ..........................452
Brake ................................................................453
Washer .......................................................... 383
Footwell light ................................................. 330
Front air conditioning system ...................313
Front Cross Traffic Alert (FCTA) ...........218
Front passenger occupant classification
system .............................................................. 40
Front seats
Adjustment ....................................................... 116
Cleaning ........................................................ 365
Correct driving posture ............................ 23
Driving position memory ......................... 127
Head restraints..............................................132
Memory recall function............................ 130
Power easy access system ..................... 127
Refresh system ............................................... 121
Seat heaters ..................................................326
Seat position memory ............................... 127
Seat ventilators ............................................326
Front side marker light
Light switch .....................................................175
Replacing light bulbs ............................... 408
Front turn signal lights
Replacing light bulbs ............................... 408
Turn signal lever .......................................... 169

5011-1. What to do if... (Troubleshooting)
LS500_OM_OM50F54U_(U) 501Alphabetical Index
Fuel
Capacity ......................................................... 449
Fuel gauge ...............................................69, 72
Fuel pump shut off system ...................... 417
Information .................................................... 457
Refueling ......................................................... 185
Type.................................................................. 449
Warning light ................................................. 421
Fuel consumption
Average fuel economy .............................. 78
Current fuel consumption........................ 78
Fuel filler door
If the fuel filler door cannot be opened
......................................................................... 435
Refueling ......................................................... 185
Fuel gauge ................................................. 69, 72
Fuel pump shut off system.......................... 417
Fuses ................................................................. 405
G
Garage door opener ................................. 349
Gauges ....................................................... 69, 72
Gear Position................................................... 80
G-force............................................................... 80
Glove box ....................................................... 335
Glove box light ............................................. 336
H
Hands Free Power Trunk Lid .................. 103
Head restraints ...............................................132
Headlights
Adaptive Front-lighting System (AFS)
........................................................................... 177
Automatic High Beam system..............178
Light switch ..................................................... 175
Replacing light bulbs............................... 408
Head-up display.............................................. 83
Driving information display area........... 83
Driving support system display area .. 86
Eco Driving Indicator ................................. 87
HUD (Head-up display) switch............85 Navigation system-linked display ........83
Pop-up display ...............................................86
Settings...............................................................85
Heated steering wheel .............................. 326
Heaters
Front air conditioning system ............... 313
Heated steering wheel ............................326
Outside rear view mirrors.......................314
Rear air conditioning system ............... 323
Seat heaters ..................................................326
Height control
Electronically modulated air suspension
.......................................................................... 292
Hill-start assist control ............................... 294
Hood
Open................................................................375
Pop Up Hood.................................................38
Hooks
Coat hooks ...................................................343
Retaining hooks (floor mat) ..................... 22
Horn ....................................................................135
HUD (Head-up display) switch ................ 85
I
I/M test ............................................................ 372
Identification
Engine..............................................................449
Vehicle ........................................................... 448
Ignition switch (engine switch)................ 160
Auto power off function............................162
Changing the engine switch modes ..162
If your vehicle has to be stopped in an
emergency .................................................. 410
Indicators ........................................................... 66
Initialization
Items to initialize .........................................482
Maintenance......................................368, 381
Power windows ........................................... 139
Tire pressure warning system .............392
Inside door handle lights........................... 330
Inside rear view mirror ................................136
Instrument panel light control ............. 71, 75