2014 Lexus GS250 engine overheat

2564-2. Driving procedures
GS350_250_OM_OM30E16E_(EE)
The parking brake is set or released automatically according to shift lever
operation.
Turns automatic mode on/off
●When the shift lever is moved out
of P, the parking brake will be
released.
●When the shift lever is moved into
P, the parking brake will be set.
Operate the shift lever with the brake
pedal depressed.
■Parking brake operation
●When the engine switch is not in IGNITION ON mode, the parking brake cannot
be released using the parking brake switch.
●When the engine switch is not in IGNITION ON mode, automatic mode (auto-
matic brake setting and releasing) is not available.
●If the parking brake is operated repeatedly over a short period of time, the system
may restrict operation to prevent overheating. If this happens, refrain from operat-
ing the parking brake. Normal operation will return after about 1 minute.
■Parking brake operation sound
When the parking brake operates, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.
■Parking brake indicator light
●Depending on the engine switch mode, the parking brake indicator light will come
on and stay on as described below:
IGNITION ON mode: Comes on until the parking brake is released.
Not in IGNITION ON mode: Stays on for approximately 15 seconds.
●When the engine switch is turned off with the parking brake set, the parking brake
indicator light will stay on for about 15 seconds. This does not indicate a malfunc-
tion.
Automatic mode
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279
4
4-3. Operating the lights and wipers
Driving
GS350_250_OM_OM30E16E_(EE)
Headlight cleaner switch
Press the switch to clean the head-
lights.
■The headlight cleaners can be operated when
The engine switch is in IGNITION ON mode and the headlight switch is turned on.
■Windshield washer linked operation
When the windshield washer is operated with the engine switch in IGNITION ON
mode and the headlights on, the headlight cleaners will operate once. (
→P. 2 7 2 )
Washer fluid can be sprayed on the headlights.
NOTICE
■When the washer fluid tank is empty
Do not press the switch continually as the washer fluid pump may overheat.
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3254-5. Using the driving support systems
4
Driving
GS350_250_OM_OM30E16E_(EE)
■Reactivation of the TRC system linked to vehicle speed
When only the TRC system is turned off, the TRC system will turn on when vehicle
speed increases. However, when both TRC and VSC systems are turned off, the sys-
tems will not turn on even when vehicle speed increases.
■Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from overheat-
ing when there is frequent steering input over an extended period of time. The steer-
ing wheel may feel heavy as a result.
* Should this occur, refrain from excessive
steering input or stop the vehicle and turn the engine off. The EPS system should
return to normal within 10 minutes.
*: If the LKA (Lane-Keeping Assist) system cannot operate in this case, a warning
message will be shown on the multi-information display.
■Operating conditions of emergency brake signal
When the following three conditions are met, the emergency brake signal will oper-
ate:
●The emergency flashers are off.
●Actual vehicle speed is over 55 km/h (35 mph).
●The brake pedal is depressed in a manner that cause the system to judge from the
vehicle deceleration that this is a sudden braking operation.
■Automatic system cancelation of emergency brake signal
The emergency brake signal will turn off in any of the following situations:
●The emergency flashers are turned on.
●The brake pedal is released.
●The system judges from the vehicle deceleration that is not a sudden braking oper-
ation.
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533
7When trouble arises
GS350_250_OM_OM30E16E_(EE)
7-1. Essential informationEmergency flashers...................534
If your vehicle has to be stopped
in an emergency ......................535 7-2. Steps to take in an emergency
If your vehicle needs to be towed................................ 536
If you think something is wrong....................................... 542
Fuel pump shut off system ...... 543
If a warning light turns on or a warning buzzer sounds..... 544
If a warning message is displayed ................................ 552
If you have a flat tire (vehicles with a spare tire) .......................577
If you have a flat tire (vehicles without a spare tire) ............... 592
If the engine will not start .......... 612
If the shift lever cannot be shifted from P..............................614
If the parking brake cannot be released...................615
If the electronic key does not operate properly ...................... 618
If the vehicle battery is discharged ...............................621
If your vehicle overheats ......... 625
If the vehicle becomes stuck ......................... 628
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625
7
7-2. Steps to take in an emergency
When trouble arises
GS350_250_OM_OM30E16E_(EE)
If your vehicle overheats
Stop the vehicle in a safe place and turn 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
radiator core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact any autho-
rized Lexus dealer or repairer, or
another duly qualified and
equipped professional.
The following may indicate that your vehicle is overheating.
●The needle of the engine coolant temperature gauge ( →P. 99)
enters the red zone or a loss of engine power is experienced. (For
example, the vehicle speed does not increase.)
●Steam is coming from under the hood.
Correction procedures
1
2
3
1
2
GS350_250_OM_OM30E16E_(EE).book Page 625 Tuesday, July 8, 201 4 7:11 PM

674Alphabetical index
GS350_250_OM_OM30E16E_(EE)
Card key.....................................................122
Care ............................................... 436, 440Aluminum wheels .............................. 437
Exterior....................................................436
Interior .....................................................440
Seat belts ..................................................441
Cargo hooks...........................................409
CD player
*
Chains ....................................................... 356
Child restraint system ............................ 59 Baby seats, definition ..........................60
Baby seats, installation ......................... 71
Child seats, definition..........................60
Child seats, installation......................... 71
Installing CRS with ISOFIX
rigid anchors.........................................74
Installing CRS with seat belts............ 71
Installing CRS with top strap .......... 75
Junior seats, definition ........................60
Junior seats, installation ..................... 73 Child safety ................................................ 58
Airbag precautions .............................. 47
Battery precautions.............. 464, 624
Child restraint system ........................ 59
How your child should wear the seat belt....................... 39, 41
Installing child restraints .....................70
Moon roof precautions ...................... 211
Power window lock switch .......... 204
Power window precautions......... 207
Rear door child-protectors ............ 172
Removed electronic key battery precautions......................... 491
Seat belt comfort guide..................... 39
Seat belt precautions...........................43
Seat heater precautions ...................418
Trunk precautions .............................. 178
Child-protectors ....................................... 172
Cleaning........................................436, 440 Aluminum wheels...............................437
Exterior ................................................... 436
Interior..................................................... 440
Seat belts ................................................. 441
Clock ...........................................................413
Coat hooks................................................431
Condenser ...............................................461
Console box ........................................... 405
Console box light ................................. 405
Cooling system ..................................... 459 Engine overheating .......................... 625
C
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676Alphabetical index
GS350_250_OM_OM30E16E_(EE)
Eco drive mode ...................................... 315
Eco Driving Indicator .................. 108, 112
Electric Power Steering (EPS)......... 321Function .................................................... 321
Warning light .......................................546
Warning message.............................557
Electronic key...........................................122
Battery-saving function.....................133
If the electronic key does not operate properly ............................. 618
Replacing the battery...................... 489
Emergency, in case of If a warning buzzer sounds .......... 544
If a warning light turns on...............544
If a warning message is
displayed ............................................552
If the battery is discharged ..............621
If the electronic key does not operate properly ............................. 618
If the engine will not start .................612
If the parking brake cannot be released......................................... 615
If the shift lever cannot be
shifted from P .....................................614
If you have a flat tire .............. 577, 592
If you think something is wrong............................................... 542
If your vehicle becomes stuck.....628
If your vehicle has to be stopped in an emergency..........535
If your vehicle needs to
be towed.............................................536
If your vehicle overheats ................625 Emergency brake signal......................321
Emergency flashers............................. 534
Emergency tire puncture
repair kit ................................................ 592
Engine ....................................................... 634 Accessory mode ............................... 238
Compartment ..................................... 454
Engine switch .......................................237
Hood ....................................................... 450
How to start the engine ..................237
Identification number....................... 633
If the engine will not start ................. 612
Ignition switch (engine switch)................................. 237
Overheating ........................................ 625
Engine compartment cover ............. 455
Engine coolant....................................... 459 Capacity................................................. 642
Checking ............................................... 459
Preparing and checking
before winter.................................... 354
Engine coolant temperature
gauge ........................................................ 99
Engine immobilizer system ................. 80
Engine oil ................................................. 456 Capacity................................................. 635
Checking ............................................... 456
Oil level warning message........... 562
Oil pressure warning message ............................................. 553
Preparing and checking before winter.................................... 354
E
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681Alphabetical index
GS350_250_OM_OM30E16E_(EE)
nanoe system......................................... 389
Navigation system
*
Odometer................................................... 99
OilEngine oil ...............................................635
Front differential oil ...........................644
Rear differential oil.............................644
Opener Hood ....................................................... 450
Trunk ..........................................................175
Outer foot lights
Location..................................................399
Replacing light bulbs........................ 526
Wattage.................................................. 647
Outside rear view mirrors ................. 199
Adjusting and folding........................ 199
BSM (Blind Spot Monitor) .............341
Linked mirror function when reversing................................. 201
Mirror position memory.................. 186
Outside rear view mirror defoggers ..........................................396
Outside temperature display ........... 103
Overheating, Engine...........................625 Paddle shift switches ............................247
Parking assist sensors
*
Parking brake......................................... 255
If the parking brake cannot be released .........................................615
Operation ............................................. 255
Parking brake engaged warning buzzer................................. 561
Parking brake engaged
warning message ............................ 561
PCS
(Pre-Crash Safety system)............ 330Function.................................................. 330
PCS OFF switch.................................. 331
Warning light....................................... 546
Warning message ... 554, 563, 569
Personal lights........................................400
Pollen removal mode.......................... 384
Power easy access system ................ 186
Power outlets ...........................................415
Power steering ........................................321
Warning light....................................... 546
Warning message ............................ 557
Power trunk lid ........................................ 175
Power windows ..................................... 204 Door lock linked window operation............................................ 206
Jam protection function ................. 205
Operation ............................................. 204
Window lock switch ........................ 204
N
O
P
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.
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