coolant temperature LEXUS LS500H 2019 User Guide

4247-2. Steps to take in an emergency
LS500h_OM_(U)_1809
■Brake system warning light (warning buzzer)
■Brake system warning light (warning buzzer)
■High coolant temperature warning light* (warning buzzer)
*: This light illuminates on the multi-information display.
If a warning light turns on or a warning buzzer sounds
Calmly perform the following actions if any of the warning lights comes on or
flashes. If a light comes on or flashes, bu t then goes off, this does not necessar-
ily indicate a malfunction in the system. However, if this continues to occur,
have the vehicle inspected by your Lexus dealer.
Actions to the warning lights or warning buzzers
Warning lightDetails/Actions
(U.S.A.)
or
(red)
(Canada)
Indicates that:
 The brake fluid level is low; or
 The brake system is malfunctioning
 Immediately stop the vehicle in a safe place and contact your Lexus
dealer. Continuing to drive the vehicle may be dangerous.
Indicates that the brake pads are worn out (only the right-side pads can
be detected)
 Have the vehicle inspected by your Lexus dealer.
Warning lightDetails/Actions
(yellow)
Indicates a malfunction in:
The regenerative braking system;
 The electronically controlled brake system; or
 The parking brake system
 Have the vehicle inspected by your Lexus dealer immediately.
Warning lightDetails/Actions
Indicates that the engine coolant temperature is too high
Immediately stop the vehicle in a safe place.
Handling method ( P.450)

4507-2. Steps to take in an emergency
LS500h_OM_(U)_1809
If the engine coolant temperature
gauge enters the red zone or
“Engine Coolant Temp High Stop in
a Safe Place See Owner’s Manual”
is shown on the multi-information
display
1 Stop the vehicle in a safe place and
turn off the air conditioning system,
and then stop the hybrid system.
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 hybrid system has cooled
down sufficiently, inspect the hoses
NOTICE
■When handling jumper cables
When connecting the jumper cables,
ensure that they do not become entan-
gled in the cooling fan or engine drive
belt.
■To prevent damaging the vehicle
The exclusive jump starting terminal is to
be used when charging the 12-volt bat-
tery from another ve hicle in an emer-
gency. It cannot be used to jump start
another vehicle.
If your vehicle overheats
The following may indicate that
your vehicle is overheating.
 The engine coolant temperature
gauge ( P.81, 85) is in the red
zone or a loss of hybrid system
power is experienced. (For exam-
ple, the vehicle speed does not
increase.)
 “Engine Coolant Temp High Stop
in a Safe Place See Owner’s
Manual” or “Hybrid System
Overheated Output Power
Reduced” is shown on the
multi-information display.
 Steam comes out from under the
hood.
Correction procedures

4527-2. Steps to take in an emergency
LS500h_OM_(U)_1809
3After the hybrid system has cooled
down, inspect the hoses and radia-
tor core (radiator) for any leaks.
Radiator
Cooling fan
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
4The coolant level is satisfactory if it
is between the “F” and “L” lines on
the reservoir.
Reservoir
“F” line
“L” line
5 Remove the engine compartment
cover and add coolant if necessary.
Water can be used in an emergency if coolant is unavailable.
6
After stopping the hybrid system
and waiting for 5 minutes or more,
start the hybrid system again and
check for the multi-information dis-
play.
If the message does not disappear:
Stop the hybrid system and contact
your Lexus dealer.
If the message is not displayed:
The hybrid system temperature has
dropped and the vehicle may be
driven normally.
However, if the message appears again fre-
quently, contact your Lexus dealer.
■When adding engine coolant
Add coolant in accordance with the follow-
ing procedure.
A
B
A
B
C

4537-2. Steps to take in an emergency
LS500h_OM_(U)_1809
7
When trouble arises
1 Remove the engine compartment
cover.
2 Push the tab in and open the engine
compartment cover.
3 Remove the engine cover.
4 Remove the caps and . 5
Add coolant through the inlet of the cap
up to the “F” line , and then
replace the cap .
6 Add coolant through the inlet of the cap
until it is full, and then replace the
cap .
AB
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.
●After the hybrid system has been
turned off, check that the “READY”
indicator off.
When the hybrid system is operating,
the gasoline engine may automatically
start, or the cooling fan may suddenly
operate even if the gasoline engine
stops. Do not touch or approach rotat-
ing parts such as the fan, which may
lead to fingers or clothing (especially a
tie, a scarf or a muffler) getting caught,
resulting in serious injury.
●Do not loosen the coolant inlet cap or
the coolant reservoir cap while the
hybrid system and radiator are hot.
High temperature steam or coolant
could spray out.
NOTICE
■When adding engine/power control
unit coolant
Add coolant slowly after the hybrid sys-
tem has cooled down sufficiently. Adding
cool coolant to a hot hybrid system too
quickly can cause dama ge to the hybrid
system.
AC
A
B
B

4618-1. Specifications
LS500h_OM_(U)_1809
8
Vehicle specifications
Outside temperature
Oil viscosity (0W-20 is explained here
as an example):
• The 0W in 0W-20 indicates the characteristic of the oil which allows
cold startability. Oils with a lower
value before the W allow for easier
starting of the engine in cold
weather.
• The 20 in 0W-20 indicates the vis- cosity characteristic of the oil when
the oil is at high temperature. An oil with a higher viscosity (one with a
higher value) may be better suited if
the vehicle is operated at high
speeds, or under extreme load con-
ditions.
How to read oil container label:
The International Lubricant Specifica-
tion Advisory Committee (ILSAC)
Certification Mark is added to some oil
containers to help you select the oil you
should use.A
Cooling system
Capacity
Gasoline
engine11.6 qt. (11.0 L, 9.7 Imp. qt.)
Power con-
trol unit2.6 qt. (2.5 L, 2.2 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)
MakeDENSO FK20HBR8
Gap0.031 in. (0.8 mm)

512Alphabetical Index
LS500h_OM_(U)_1809
If you have a flat tire .................................. 439
If you lose your keys................................. 442
If you think something is wrong ......... 423
If your vehicle becomes stuck............. 454
If your vehicle has to be stopped in an
emergency ..................................................416
If your vehicle needs to be towed .......419
If your vehicle overheats ........................450
Energy monitor .................................... 100, 101
Engine ACCESSORY mode ............................... 172
Compartment .............................................384
Engine compartment cover ................ 385
Engine switch.................................................170
Hood................................................................ 382
How to start the hybrid system ............170
Identification number ...............................459
If the hybrid system will not start ........440
If your vehicle has to be stopped in an
emergency ..................................................416
Ignition switch (power switch) ..............170
Overheating.................................................450
Power switch .................................................170
Tachometer ............................................. 81, 85
Engine compartment cover ....................385
Engine coolant Capacity ...........................................................461
Checking ....................................................... 387
Preparing and checking before winter.........................................................................309
Engine coolant temperature gauge 81, 85
Engine oil Capacity .........................................................460
Checking ...................................................... 385
Preparing and checking before winter.........................................................................309
Warning light ............................................... 425
Engine oil maintenance data .................. 387
Engine switch (power switch) ..................170 If your vehicle has to be stopped in an
emergency ..................................................416 EPS (Electric Power Steering) .............. 302
Warning light ............................................... 427
EV drive mode................................................ 174
EV indicator ...................................................... 64
Event data recorder (E DR) ........................... 8
F
FCTA (Front Cross Traffic Alert) ......... 230
First-aid kit storage belt ..............................351
Flat tire
Tire pressure warning system .............394
Floor mats ...........................................................22
Fluid Brake ................................................................463
Hybrid transmission.................................. 462
Washer .......................................................... 389
Footwell light ...................................................341
Front automatic air conditioning system .......................................................................... 323
Front Cross Traffic Alert (FCTA) ......... 230
Front passenger occupant classification system .............................................................. 40
Front seats Adjustment ....................................................... 131
Cleaning ...........................................................371
Correct driving posture ............................ 23
Driving position memory .........................142
Head restraints..............................................147
Memory recall function............................ 145
Power easy access system .....................142
Refresh system ............................................. 136
Seat heaters .................................................. 337
Seat position memory ...............................142
Seat ventilators ............................................ 337
Front side marker light Light switch .................................................... 187
Replacing light bulbs ..................................414
Front turn signal lights Replacing light bulbs ..................................414
Turn signal lever .......................................... 182
Fuel Capacity ........................................................ 459

5211-1. What to do if... (Troubleshooting)
LS500h_OM_(U)_1809521Alphabetical Index
U
USB charging ports.................................... 353
V
Vanity lights.................................................... 357
Vanity mirrors ............................................... 357
Variable Gear Ratio Steering (VGRS)302
VDIM (Vehicle Dynami cs Integrated Man-
agement)...................................................... 303
Vehicle data recordings ..................................7
Vehicle Dynamics Integrated Manage- ment (VDIM).............................................. 303
Vehicle identification number ................ 458
Vehicle Stability Control (VSC) ........... 302
Ventilators (seat ventilators)................... 337
VGRS (Variable Gear Ratio Steering)302
VSC (Vehicle Stabilit y Control) ........... 302
W
Warning buzzer
Hands off steering wheel alert (LTA)244
LTA (Lane-Tracing Assist) ................... 236
Warning buzzers ABS .................................................................. 426
Airbags ........................................................... 426
Approach warning......................................251
Brake hold....................................................... 431
Brake Override System ......................... 427
Brake system ............................................... 424
Charging system ....................................... 425
Downshifting ................................................... 181
Drive-Start Control .................................. 427
Electric power steering .......................... 427
Engine ............................................................. 426
High coolant temperature .................... 424
Hybrid system ............................................. 426
Intuitive parking assist.................. 270, 429
Low engine oil pressure......................... 425
LTA (Lane Tracing Assi st)........ 233, 429
Open door...............................................113, 115 Open window .............................................. 155
PKSA (Parking Support Alert) ........... 264
PKSB (Parking Support Brake) ........ 430
Pop Up Hood.............................................. 426
Pre-collision braking ...................... 212, 224
RCD (Rear Camera Detection) ........ 429
RCTA (Rear Cross Tra
ffic Alert) ...... 429
Seat belt .............................................. 427, 428
Warning label .................................................. 66
Warning lights............................................... 424 ABS ................................................................... 426
Brake hold operated indicator .............431
Brake Override System ......................... 427
Brake system................................................ 424
Charging system........................................425
Drive-Start Control................................... 427
Electric power steering........................... 427
High coolant temperature..................... 424
Hybrid system overheat warning light..........................................................................425
Intuitive parking assist OFF indicator429
Low engine oil pressure.........................425
Low fuel level ............................................... 427
Low traction battery warning light ....425
LTA indicator ............................................... 429
Malfunction indicator lamp ................... 426
Master warning light...................................431
Parking brake indicator ............................431
PKSB OFF indicator ............................... 430
Pop Up Hood.............................................. 426
Pre-collision system................................. 430
RCD OFF indicator.................................. 429
RCTA OFF indicator ............................... 429
Seat belt reminder light............... 427, 428
Slip indicator ................................................ 430
SRS .................................................................... 426
Tire pressure ................................................428
Warning messages ..................................... 434
Warning reflector storage belt................351
Washer Adding............................................................ 389