engine overheat Lexus GS300 2018 s User Guide

423
GS350_300_GS F_OM_OM30G34U_(U)
7When trouble arises
7-1. Essential informationEmergency flashers................... 424
If your vehicle has to be stopped in an
emergency .................................425 7-2. Steps to take in an
emergency
If your vehicle needs to be towed................................ 426
If you think something is wrong ................ 432
Fuel pump shut off system ...... 433
If a warning light turns on or a warning buzzer
sounds.......................................... 434
If a warning message is displayed.......................................441
If you have a flat tire (vehicles with spare tire) ......................... 472
If you have a flat tire (vehicles without spare tire)...................483
If the engine will not start ........ 497
If the parking brake cannot be released ................................ 499
If the electronic key does not operate properly ...................... 501
If the vehicle battery is discharged .................................504
If your vehicle overheats .........509
If the vehicle becomes stuck .............................................. 515

4477-2. Steps to take in an emergency
GS350_300_GS F_OM_OM30G34U_(U)
7
When trouble arises
(If equipped)
Indicates that the LKA (Lane- Keeping Assist) system has
determined that the driver does not have their hands on
the steering wheel while the steering control function is
on If the driver operates the steering wheel only a small
amount, the system may be unable to detect the steer-
ing wheel operations and this warning may be dis-
played.
A buzzer also sounds.
→ Firmly hold the steering wheel.
(If equipped)
Indicates that steering control function is temporarily
canceled due to the LKA (Lane-Keeping Assist) system
determining that the driver does not have their hands on
the steering wheel while the steering control function is
on
If the driver operates the steering wheel only a small
amount, the system may be unable to detect the steer-
ing wheel operations and this warning may be dis-
played.
→ Firmly hold the steering wheel.
Indicates that the parking brake system is overheating
A buzzer also sounds.
→ Do not use the parking brake until the message dis-
appears.
Indicates an engine malfunction
A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
Warning messageDetails/Actions
(U.S.A.) (Canada)
(U.S.A.) (Canada)

509
GS350_300_GS F_OM_OM30G34U_(U)
7
When trouble arises
7-2. Steps to take in an emergency
If your vehicle overheats
●The needle of the engine coolant temperature gauge (→P. 86, 92) enters 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 is coming from under the hood.
Stop the vehicle in a safe place and tu rn off the air conditioning system, and
then stop the engine.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the engine has cooled down sufficiently, inspect the hoses and cooling
core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Lexus
dealer.
The following may indicate that your vehicle is overheating.
Correction procedures
1
2
3
1
2

582Alphabetical index
GS350_300_GS F_OM_OM30G34U_(U)
Child restraint system............................ 59Booster seats, definition ....................59
Booster seats, installation.................. 67
Convertible seats, definition ............59
Convertible seats, installation .........65
Front passenger occupant classification system ......................... 52
Infant seats, definition ..........................59
Infant seats, installation .......................65
Installing CRS with LATCH anchors ..................... 64
Installing CRS with seat belts ..........65
Installing CRS with top tether strap .........................68
Child safety ................................................ 58 Airbag precautions .............................. 44
Battery precautions .............. 391, 508
Child restraint system .........................59
How your child should wear the seat belt ................................. 37, 38
Installing child restraints..................... 63
Moon roof precautions....................180
Power window lock switch ............ 175
Power window precautions ........... 177
Rear door child-protectors ........... 140
Removed electronic key battery precautions.................. 411
Seat belt comfort guide ..................... 37
Seat belt extender precautions ......40
Seat belt precautions .......................... 62
Seat heater precautions.................. 322
Trunk precautions............................... 146 Child-protectors .................................... 140
Cleaning .......................................358, 362
Aluminum wheels ..............................359
Exterior ...................................................358
Interior ..................................................... 362
Seat belts................................................ 363
Clock................................................. 87, 339
Coat hooks ..............................................344
Condenser.............................................. 388
Console box ............................................. 331
Console box light ................................... 331
Consumption screen ............................ 128
Cooling system ..................................... 386 Engine overheating ......................... 509
Consumption screen ............................ 127
Cruise control Cruise control ..................................... 270
Dynamic radar cruise control with full-speed range ...................258
Cup holders............................................ 332
Curtain shield airbags ............................ 42
Customizable features ...................... 545
Daytime running light system............ 217
Defogger Front windshield................................... 314
Outside rear view mirrors .............. 314
Rear window.......................................... 314
Differential Front differential ................................. 526
Rear differential................................... 527
D

584Alphabetical index
GS350_300_GS F_OM_OM30G34U_(U)
Eco drive mode ..................................... 273
Eco Driving Indicator............................. 85
Eco driving meter .................................... 92
EDR (Event data recorder) ...................10
Electric Power Steering (EPS) ....... 289Function ................................................. 289
Warning light .......................................435
Warning message .............................. 441
Electronic key ..........................................132 Battery-saving function .................... 152
If the electronic key does not operate properly.............................. 501
Replacing the battery ........................ 410
Emergency, in case of If a warning buzzer sounds...........434
If a warning light turns on...............434
If a warning message is displayed ......................................... 441
If the electronic key does not operate properly ......... 501
If the engine will not start................ 497
If the parking brake cannot be released ....................... 499
If the vehicle battery is discharged ........................................ 504
If you have a flat tire ..............472, 483
If you think something is wrong............................................... 432
If your vehicle becomes stuck ...... 515
If your vehicle has to be stopped in an emergency .............................425
If your vehicle needs to be towed .......................................426
If your vehicle overheats ............... 509 Emergency flashers .............................424
Emergency tire puncture repair
kit ............................................................. 483
Engine Accessory mode ................................ 198
Compartment ..................................... 376
Engine switch ........................................ 197
Hood........................................................ 373
How to start the engine.................... 197
Identification number.......................520
Ignition switch (engine switch.................................... 197
Overheating........................................ 509
Engine compartment cover..............379
Engine coolant ...................................... 386 Capacity................................................. 525
Checking ...............................................386
Preparing and checking before winter .................................... 296
Engine coolant temperature gauge ................................................ 86, 94
Engine immobilizer system .................. 72
Engine oil ...................................................381 Capacity................................................. 522
Checking ................................................ 381
Oil level warning message ............. 441
Oil pressure warning message............................. 441
Preparing and checking before winter .................................... 296
E

590Alphabetical index
GS350_300_GS F_OM_OM30G34U_(U)
Outer foot lightsOuter foot lights ................................. 327
Replacing light bulbs ........................420
Wattage ................................................... 531
Outside rear view mirrors ................... 171 Adjusting and folding.......................... 171
Blind Spot Monitor............................278
Linked mirror function when reversing ..................................173
Mirror position memory .................. 160
Outside rear view mirror defoggers ............................. 314
Outside temperature display ..... 87, 94
Overheating, Engine ..........................509
Paddle shift switches ........................... 204
Parking assist sensors (intuitive parking assist)
*
Parking brake............................................ 211 If the parking brake cannot be released ....................... 499
Operation ................................................. 211
Parking brake engaged warning buzzer ................................ 441
Parking brake engaged warning message ............................ 441
Parking lights ............................................216 Light switch ............................................ 216
Replacing light bulbs ........................420
Welcome light illumination control ......................... 138 PCS (Pre-Collision System)............ 238
Function .................................................. 238
Warning light ....................................... 435
Warning message............................... 441
Personal lights ....................................... 328
Power easy access system .................160
Pop-up display ............................... 105, 117
Power outlets ......................................... 340
Power steering (Electric Power Steering system)................................ 289 Warning light ....................................... 435
Warning message............................... 441
Power trunk opener and closer ....... 143
Power windows....................................... 175 Door lock linked window operation ........................... 176
Jam protection function.................... 175
Operation................................................ 175
Window lock switch .......................... 175
Pre-Collision System (PCS)............ 238 Function .................................................. 238
Warning light ....................................... 435
Warning message............................... 441
P