2017 LEXUS LS600H engine overheat

15Pictorial index
LS600h/LS600hL_EE(OM50G20E)
Windshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 281
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 384
To prevent freezing (windshield wiper de-icer)*. . . . . . . . . . . . . . . . . . . .P. 426
Precautions against car wash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 478
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P . 285
Refueling method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 285
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 622
Tires. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 506
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 630
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 384
Checking/rotation/tire pressure warning system . . . . . . . . . . . . . . . . . . P. 506
Coping with flat tires. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 567, 578
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 489
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 489
Engine compartment cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 493
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 624
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 611
Warning messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 563
Headlights/front position lights/daytime running lights . . . . . . . . . . . P. 269
Front fog lights/rear fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 280
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 2 62
Tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 269
Stop lights
Hill-start assist control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 338
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 269
Back-up lights
Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 255
4
5
6
7
Light bulbs of the exteri or lights for driving
(Replacing method: P. 541, Watts: P. 631)
*: If equipped
8
9
10
11
12
13
14

1202. Instrument cluster
LS600h/LS600hL_EE(OM50G20E)
■Tachometer
Hybrid System Indicator switches to the tachometer when driving mode is in sport
mode.
■Engine speed
On hybrid vehicles, engine speed is precisely controlled in order to help improve
fuel efficiency and reduce exhaust emissions etc.
There are times when the engine speed that is displayed may differ even when vehi-
cle operation and driving conditions are the same.
■Outside temperature display
In the following situations, the correct outside temperature may not be displayed, or
the display may take longer than normal to change.
●When stopped, or driving at low speeds (less than 20 km/h [12 mph])
●When the outside temperature has changed suddenly (at the entrance/exit of a
garage, tunnel, etc.)
■Customization
Settings (e.g. on/off operation of ECO lamp) can be changed.
(Customizable features P. 636)
NOTICE
■To prevent damage to the engine and its components
●Do not let the indicator needle of the tachometer enter the red zone, which indi-
cates the maximum engine speed.
●The engine may be overheating if the engine coolant temperature gauge is in the
red zone (H). In this case, immediately stop the vehicle in a safe place, and check
the engine after it has cooled completely. ( P. 611)

2384-1. Before driving
LS600h/LS600hL_EE(OM50G20E)
CAUTION
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When driving the vehicle
●During normal driving, do not turn off the hybrid system. Turning the hybrid sys-
tem off while driving will not cause loss of steering or braking control, however,
power assist to the steering will be lost. This will make it more difficult to steer
smoothly, so you should pull over and stop the vehicle as soon as it is safe to do so.
In the event of an emergency, such as if it becomes impossible to stop the vehicle
in the normal way: P. 547
●Use engine braking (downshift) to maintain a safe speed when driving down a
steep hill.
Using the brakes continuously may cause the brakes to overheat and lose effec-
tiveness. ( P. 255)
●Do not adjust the positions of the steering wheel, the seat, or the inside or outside
rear view mirrors while driving.
Doing so may result in a loss of vehicle control.
●Always check that all passengers’ arms, heads or other parts of their body are not
outside the vehicle.

2404-1. Before driving
LS600h/LS600hL_EE(OM50G20E)
CAUTION
Observe the following precautions.
Failure to do so may result in death or serious injury.
■If a brake pad wear warning message is displayed
Have the brake pads checked and replaced by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional, as soon as possible.
Rotor damage can result if the pads are not replaced when needed.
Moderate levels of the brake pad and disc wear allow enhanced braking power. As
a result, the discs may wear more quickly than conventional brake discs. Therefore,
when replacing the brake pads, Lexus recommends that you also have the thick-
ness of the discs measured.
It is dangerous to drive the vehicle when the wear limits of the brake pads and/or
those of the brake discs are exceeded.
■When the vehicle is stopped
●Do not depress the accelerator pedal unnecessarily.
If the vehicle is in any gear other than P or N, the vehicle may accelerate suddenly
and unexpectedly, causing an accident.
●In order to prevent accidents due to the vehicle rolling away, always keep
depressing the brake pedal while the “READY” indicator is on, and apply the
parking brake as necessary.
●If the vehicle is stopped on an incline, in order to prevent accidents caused by the
vehicle rolling forward or backward, always depress the brake pedal and securely
apply the parking brake as needed.
●Avoid revving or racing the engine.
Running the engine at high speed while the vehicle is stopped may cause the
exhaust system to overheat, which could result in a fire if combustible material is
nearby.

6117-2. Steps to take in an emergency
7
When trouble arises
LS600h/LS600hL_EE(OM50G20E)
●The needle of the engine coolant temperature gauge ( P. 115) enters
the red zone or a loss of hybrid system power is experienced. (For
example, the vehicle speed does not increase.)
●“Hybrid System Overheat” is shown on the multi-information display.
●Steam comes out from under the hood.
■If the needle of the engine cool ant temperature gauge enters the red
zone
Stop the vehicle in a safe place and turn off the air conditioning sys-
tem, and then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has
cooled down sufficiently,
inspect the hoses and radiator
core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact any
authorized Lexus dealer or
repairer, or anot her duly quali-
fied and equipped professional.
If your vehicle overheats
The following may indicate that your vehicle is overheating.
Correction procedures
1
2
3
1
2

657Alphabetical index
LS600h/LS600hL_EE(OM50G20E)
Climate control seat ............................456
Climate control seat filter..................459
Clock ......................................................... 447
Clock light ............................................... 427
Coat hooks .............................................. 472
Coin holder ............................................. 434
Condenser ............................................ 500
Console box ........................................... 437
Coolant .....................................................498
Capacity ................................................. 627
Checking .............................................. 498
Preparing and checking
before winter ....................................384
Cooling system ......................................498
Engine overheating ............................. 611
Hybrid system overheating ............. 611
Cruise control
Cruise control .....................................289
Dynamic radar cruise control ..... 293
Dynamic radar cruise control
with full-speed range.................... 307
Cup holders ............................................435
Curtain shield airbags ...........................50
Customizable features ....................... 634
Daytime running light system ........... 271
Defogger
Outside rear view mirrors ............ 425
Rear window........................................ 425
Windshield ........................................... 407
Differential
Front differential ................................. 629
Rear differential .................................. 629
Dimensions ............................................. 620
Display
Dynamic radar cruise control ..... 293
Dynamic radar cruise control
with full-speed range ................... 307
LKA (Lane-Keeping Assist) ........ 328
Multi-information display................... 121
Remote Touch screen .................... 390
Trip information.................................... 123
Warning message ............................ 563
Do-it-yourself maintenance ............. 486
D

659Alphabetical index
LS600h/LS600hL_EE(OM50G20E)
Eco drive mode ..................................... 334
Electric motor (traction motor) .........85
Electric Power Steering (EPS)........339
Function ..................................................339
Warning light ....................................... 557
Electronic key.......................................... 140
If the electronic key does not
operate properly ........................... 603
Replacing the battery....................... 532
Electronically modulated air
suspension ............................................ 336
Emergency brake signal ....................339
Emergency flashers .............................546
Emergency, in case of
If a warning message is
displayed ............................................563
If the 12-volt battery is
discharged.........................................607
If the electronic key does not
operate properly ........................... 603
If the hybrid system will not
start ........................................................ 597
If the parking brake cannot
be released....................................... 599
If the warning buzzer sounds ..... 555
If the warning light turns on ......... 555
If you have a flat tire..............567, 578
If you think something
is wrong .............................................. 554
If your vehicle becomes stuck ...... 616
If your vehicle has to be
stopped in an emergency ......... 547
If your vehicle needs to
be towed ............................................ 548
If your vehicle overheats....................611
Emergency tire puncture
repair kit ................................................ 578
Energy monitor ........................................ 131
Engine
ACCESSORY mode ..................... 248
Compartment ..................................... 492
Engine switch ....................................... 247
Hood ....................................................... 489
How to start the hybrid
system................................................... 247
Identification number......................... 621
If the hybrid system will not
start ....................................................... 597
Ignition switch
(power switch) ................................. 247
Overheating ............................................611
Power switch ........................................ 247
E

666Alphabetical index
LS600h/LS600hL_EE(OM50G20E)
nanoe...................................................... 416
Navigation system*
Odometer................................................... 115
Oil
Engine oil ............................................... 624
Front differential oil ........................... 629
Rear differential oil.............................629
Opener
Fuel filler door...................................... 287
Hood ....................................................... 489
Trunk ......................................................... 180
Outer foot lights
Location.................................................. 427
Replacing light bulbs........................ 543
Outside rear view mirrors ..................221
Adjusting and folding......................... 221
BSM (Blind Sport Monitor)..........366
Linked mirror function
when reversing................................ 223
Mirror position memory................. 207
Outside rear view mirror
defoggers .......................................... 425
Outside temperature display ............. 115
Overheating .............................................. 611
Paddle shift switches ........................... 256
Parking brake......................................... 263
If the parking brake cannot
be released ....................................... 599
Operation ............................................. 263
Parking brake engaged
warning buzzer............................... 265
PCS
(Pre-Crash Safety system)............ 346
Function.................................................. 346
Pre-crash braking off switch........ 348
Warning light....................................... 557
Pelvic support seat with
seat vibrator ..........................................199
Personal lights........................................ 429
Front personal light .......................... 429
Rear personal light............................ 429
Pollen removal mode............................. 411
Power control unit .................................. 89
N
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P