2018 LEXUS LS500 engine coolant

4317-2. Steps to take in an emergency
LS500_OM_OM50F54U_(U) 7
When trouble arises ●
RSA (Road Sign Assist) (if equipped)●
AHB (Automatic High Beam)■
If “Maintenance Required Soon” is dis-
played
Indicates that all maintenance according to
the driven distance on the maintenance
schedule *
should be performed soon.
Comes on approximately 4500 miles
(7200 km) after the message has been
reset. If necessary, perform maintenance.
Please reset the message after the mainte-
nance is performed. ( → P.368)*
: Refer to the separa te “Scheduled Main-
tenance” or “Owner’s Manual Supple-
ment” for the maintenance interval
applicable to your vehicle.■
If “Maintenance Required Visit Your
Dealer” is displayed
Indicates that all maintenance is required to
correspond to the driven distance on the
maintenance schedule *
.
Comes on approximately 5000 miles
(8000 km) after the message has been
reset. (The indicator will not work properly
unless the message ha s been reset.) Per-
form the necessary maintenance. Please
reset the message after the maintenance is
performed. ( → P.368)*
: Refer to the separa te “Scheduled Main-
tenance” or “Owner’s Manual Supple-
ment” for the maintenance interval
applicable to your vehicle.
■
If “Oil Maintenance Required Soon” is
displayed
Indicates that the engine oil should be
scheduled to be changed.
Check the engine oil an d change it if neces-
sary. After changing the engine oil, make
sure to reset the message. ( → P.381)
■
If “Oil Maintenance Required” is dis-
played
Indicates that the engine oil should be
changed.
Check and change the en gine oil, and oil fil-
ter by your Lexus deal er. After changing the engine oil, make sure to reset the message.
( → P.381) ■
If “Shift System Malfunction Driving
Unavailable” is displayed
There is a malfunction in the shift control
system. Have the vehicle inspected by your
Lexus dealer immediately. ■
If a message that indicates the need for
the shift lever operation is displayed
To prevent the shift le ver from being oper-
ated incorrectly or the vehicle from moving
unexpectedly, a message that requires shift-
ing the shift position may be displayed on
the multi-information display. In that case,
follow the instruction of the message and
shift the shift position. ■
If a message that indicates the need for
visiting your Lexus dealer is displayed
The system or part shown on the
multi-information display is malfunctioning.
Have the vehicle inspected by your Lexus
dealer immediately. ■
If a message that indicates the need for
referring to Owner’ s Manual is dis-
played ●
If any of the following messages are
shown on the multi-information display,
follow the instructions.
• “Engine Coolant Temp High” ( → P.443)
•“Battery Low” ( → P.438)
• “Transmission Fluid Temp High” ( → P.164)●
If any of the following messages are
shown on the multi-info rmation display, it
may indicate a malf unction. Have the
vehicle inspected by your Lexus dealer
immediately.
• “Access System with Elec. Key Malfunc-
tion”
• “Shift System Malfunction”
• “P Switch Malfunction”
• “Shift System Unavailable”
●
If any of the following messages are
shown on the multi-info rmation display, it
may indicate a malfun ction. Immediately
stop the vehicle and contact your Lexus
dealer.
• “Braking Power Low”
• “Charging System Malfunction”
• “Oil Pressure Low”

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

4457-2. Steps to take in an emergency
LS500_OM_OM50F54U_(U) 7
When trouble arises 2 Remove the engine cover.
Lift the front of the engine cover straight up
and then pull it forward.
3 Remove the caps and .
4 Add coolant through the inlet of the cap
up to the “F” line , and then
replace the cap .
5 Add coolant through the inlet of the cap
until it is full, and then replace the
cap .
6 Install the engine compartment cover
and engine cover.
Engage the claws of the engine cover to
install it. A B
A C
A
B
B WARNING■
When inspecting under the hood of
your vehicle
Observe the following precautions.
Failure to do so may result in serious
injury such as burns. ●
If steam is seen coming from under the
hood, do not open the hood until the
steam has subsided. The engine com-
partment may be very hot. ●
Keep hands and clothing (especially a
tie, a scarf or a muffler) away from the
fan and belts.
Failure to do so may cause the hands
or clothing to be caught, resulting in
serious injury. ●
Do not loosen the coolant inlet cap,
the engine coolant reservoir cap or the
intercooler coolant reservoir cap while
the engine and radiator are hot.
High temperature steam or coolant
could spray out.
NOTICE
■
When adding engine coolant
Add coolant slowly after the engine has
cooled down sufficiently. Adding cool
coolant to a hot engine too quickly can
cause damage to the engine.
■
To prevent damage to the cooling sys-
tem
Observe the following precautions:
●
Avoid contaminating the coolant with
foreign matter (such as sand or dust
etc.).
●
Do not use any coolant additive.

4518-1. Specifications
LS500_OM_OM50F54U_(U) 8
Vehicle specifications containers to help you select the oil you
should use.
Cooling system Capacity 
Engine
2WD models: 11.2 qt. (10.6 L, 9.3 Imp. qt.)
AWD models: 11.1 qt. (10.5 L, 9.2 Imp. qt.) 
Intercooler
4.5 qt. (4.3 L, 3.8 Imp. qt.)
Coolant type Use either of the following:
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non-silicate,
non-amine, non-nitrite, and non-borate coolant with
long-life hybrid orga nic acid technology
Do not use plain water alone.
Ignition system (spark plug) Make DENSO EC22HPR-D7
Gap 0.028 in. (0.7 mm)
NOTICE
■
Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.

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

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

502 Alphabetical Index
LS500_OM_OM50F54U_(U) Intercooler...................................................... 382
Intercooler coolant
Capacity ...........................................................451
Checking ........................................................ 381
Interior lights.................................................. 330
Front interior light ......................................330
Rear interior light .......................................330
Intuitive parking assist..................... 256, 257
Function .......................................................... 257
Warning message.....................................260 J
Jack
Positioning a floor jack............................ 375
Jam protection function
Electronic roof sunshade.........................146
Moon roof ....................................................... 142
Panoramic moon roof...............................146
Power trunk opener and closer .......... 105
Power windows............................................139
Rear door sunshade ................................ 346
K
Keyless entry
Smart access system with push-button
start ..................................................................107
Wireless remote control........................... 94
Keys
Battery-saving function ........................... 108
Electronic key ................................................. 92
Engine switch................................................ 160
If the electronic key does not operate
properly....................................................... 436
If you lose your keys................................. 435
Key number plate ......................................... 92
Keyless entry .........................................96, 107
Mechanical key.............................................. 92
Replacing the battery...............................403
Warning buzzer ...........................................107
Wireless remote control........................... 94 Knee airbags .................................................... 29 L
Lane Tracing Assist (LTA)
Operation ........................................................ 221
Warning messages................................... 229
Lane-Keeping Assist (LKA)
Operation ........................................................231
Warning messages................................... 237
Language (multi-information display) .....81
LATCH anchors ............................................. 53
LDH (Lexus Dynamic Handling system)
.......................................................................... 295
Lever
Auxiliary catch lever .................................375
Hood lock release lever .........................375
Internal trunk release lever..................... 105
Shift lever ......................................................... 163
Turn signal lever .......................................... 169
Wiper lever .................................................... 180
Lexus climate concierge ............................. 311
Lexus Dynamic Handling system (LDH)
.......................................................................... 295
Lexus Enform Safety Connect............... 355
Lexus Safety System+
Automatic High Beam ............................. 178
Dynamic radar cruise control with
full-speed range ........................... 238, 241
LKA (Lane-Keeping Assist) ...................231
PCS (Pre-Collision System) ................. 210
RSA (Road Sign Assist)..........................238
Lexus Safety System+A ..............................187
Dynamic radar cruise control with
full-speed range ........................... 238, 241
FCTA (Front Cross Traffic Alert)....... 218
LTA (Lane Tracing Assist) ...................... 221
PCS (Pre-Collision System) ............... 200
RSA (Road Sign Assist)..........................238
License plate lights
Light switch .....................................................175
Replacing light bulbs ............................... 408