2013 Lexus GS350 overheating

GS350_U (OM30C34U)
812. Instrument cluster
2
Instrument cluster
■The meters and display illuminate when
The engine switch is in IGNITION ON mode.
■Instrument panel brightness adjustment
The instrument panel brightness levels when the tail lights are on and off can be
adjusted individually. However, when the surroundings are bright (daytime, etc.),
turning on the tail lights will not change th e instrument panel brightness. At this time,
any adjustments made to the instrument panel brightness levels will be applied to
both settings at once.
■Limitation of brightness adjustment
The brightness of the instrument panel ligh ts is automatically adjusted based on the
light sensor detecting how bright the surroundings are. However, if the instrument
panel brightness has been manually set to ei ther the brightest or darkest setting, the
automatic adjustment will not be performed.
■ECO lamp and SPORT lamp
●When sport mode is selected, SPORT lamp (red) will illuminate.
●When all of the following conditions are satisfied and Eco-friendly driving, ECO
lamp (blue) will illuminate. (ECO lamp will become brighter the more Eco-friendly
driving you perform. Also, while the acceleration exceeds Zone of Eco driving,
ECO lamp turns off. (P. 88) However, when Eco drive mode is selected, while
the acceleration exceeds Zone of Eco driving, ECO lamp does not turn off.):
• Driving with the shift lever in D
• Paddle shift switch is not operated.
• Either normal mode or Eco drive mode is selected.
• The vehicle speed is approximately 80 mph (130 km/h) or below.
■Customization
Settings (e.g. on/off operatio n of ECO lamp) can be changed.
(Customizable features P. 777)
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. 74 7 )

162
GS350_U (OM30C34U)
4-1. Before driving
CAUTION
■When taking a nap in the vehicle
Always turn the engine off. Otherwise, if you accidentally move the shift lever or
depress the accelerator pedal, this could cause an accident or fire due to engine
overheating. Additionally, if the vehicle is parked in a poorly ventilated area,
exhaust gases may collect and enter the vehicle, leading to death or a serious
health hazard.
■When braking
●When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and this may cause one side
of the vehicle to brake differently than the other side. Also, the parking brake may
not securely hold the vehicle.
●If the power brake assist function does not operate, do not follow other vehicles
closely and avoid hills or sharp turns that require braking.
In this case, braking is still possible, but the brake pedal should be depressed
more firmly than usual. Also, the braking distance will increase.
●The brake system consists of 2 individual hydraulic systems; if one of the systems
fails, the other will still operate. In this case, the brake pedal should be depressed
more firmly than usual and the braking distance will increase.
If this happens, do not continue to drive the vehicle. Have your brakes fixed
immediately.
■If the vehicle becomes stuck
Do not spin the wheels excessively when any of the tires is up in the air, or the vehi-
cle is stuck in sand, mud, etc. This may damage the driveline components or propel
the vehicle forward or backward, causing an accident.

GS350_U (OM30C34U)
1754-2. Driving procedures
4
Driving
■When the steering lock cannot be released
■Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, the motor may be suspended if
the engine is turned on and off repeatedly in a short period of time. In this case,
refrain from operating the engine. After about 10 seconds, the steering lock motor
will resume functioning.
■When “Check Access System with Elec. Key” will be displayed on the multi-infor-
mation display
The system may be malfunctio ning. Have the vehicle inspected by your Lexus dealer
immediately.
■If the electronic key battery is depleted
 P. 6 4 6
■Operation of the engine switch
●When operating the engine switch, one short, firm press is enough. If the switch is
pressed improperly, the engine may not st art or the engine switch mode may not
change. It is not necessary to press and hold the switch.
●If attempting to restart the engine immediately after turning the engine switch off,
the engine may not start in some cases. Af ter turning the engine switch off, please
wait a few seconds before restarting the engine.
■If the smart access system with push-but ton start has been deactivated in a cus-
tomized setting
 P. 74 0
“Steering Lock active” will be displayed on
the multi-information display.
Check that the shift lever is set in P. Press the
engine switch while turning the steering
wheel left and right.

570
GS350_U (OM30C34U)
5-7. Other interior features
CAUTION
■Burns
●Use caution when seating the following persons in a seat with the seat heater on
to avoid the possibility of burns:
• Babies, small children, the elderly, the sick and the physically challenged
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping drugs, cold remedies, etc.)
●Do not cover the seat with anything when using the seat heater.
Using the seat heater with a blanket or cushion increases the temperature of the
seat and may lead to overheating.
●Do not use seat heater more than necessary. Doing so may cause minor burns or
overheating.
NOTICE
■To prevent damage to the seat heaters/seat ventilators
Do not put heavy objects that have an unev en surface on the seat and do not stick
sharp objects (needles, nails, etc.) into the seat.
■To prevent battery discharge
Turn the seat heaters/seat ventilators off when the engine is off.

7147-2. Steps to take in an emergency
GS350_U (OM30C34U)
*: Refer to the separate “Scheduled Maintenance” or “Owner’s Manual Supple-ment” for the maintenance interval applicable to your vehicle.
Wa r n i n g m e s s a g eDetailsCorrection procedure
Indicates that the tire
position information can-
not be recognized
Drive for a short while
and check if the display
updates. If the radio wave condi-
tions improve, the dis-
play may return to
normal. If the tire pres-
sure is still not dis-
played after driving for
several minutes, stop
the vehicle in a safe
place, turn the engine
switch off then on
again, and start driving.
If the tire pressure is still
not displayed even
after repeating this sev-
eral times, have the
vehicle inspected at
your Lexus dealer.
Indicates that the pre-col-
lision system is not cur-
rently functional because
the grille cover or the
sensor is dirtyThis message also
appears when the pre-
collision system is not
functional due to over-
heating.
Check the grille cover
and the sensor and clean
them if they are dirty. In case of overheating,
the system will become
functional once the sys-
tem cools down.
(If equipped)
(Flashes)
(If equipped)

7487-2. Steps to take in an emergency
GS350_U (OM30C34U)
■Overheating
If you observe the following, your vehicle may be overheating:
●The engine coolant temperature gauge enters the red zone or a loss of power is
experienced.
●Steam comes out from under the hood.
CAUTION
■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 compartment may be very hot.
●Keep hands and clothing away from the fa ns, etc. while the engine is operating.
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 system
Observe the following precautions:
●Avoid contaminating the coolant with foreign matter (such as sand or dust etc.).
●Do not use commercially available coolant additives.
●Do not loosen the radiator cap while the
engine and radiator are hot.
High temperature steam or coolant could
spray out.

812Alphabetical index
GS350_U (OM30C34U)
Care ............................................... 594, 598Aluminum wheels ............................. 595
Exterior................................................... 594
Interior .................................................... 598
Seat belts ............................................... 599
Cargo capacity....................................... 168
Cargo hooks ..........................................558
CD player .................................................. 412
Chains .......................................................300
Child restraint system............................ 53 Booster seats, definition ....................53
Booster seats, installation.................. 63
Convertible seats, definition ............53
Convertible seats, installation .........60
Front passenger occupant classification system ......................... 47
Infant seats, definition .......................... 53
Infant seats, installation .......................60
Installing CRS with LATCH anchors .................... 58
Installing CRS with seat belts ..........60
Installing CRS with top tether strap ......................... 64 Child safety .................................................52
Airbag precautions.............................. 39
Battery precautions .............. 626, 746
Child restraint system......................... 53
How your child should wear the seat belt ................................... 31, 32
Installing child restraints .................... 57
Moon roof precautions ..................... 151
Power window lock switch.............145
Power window precautions ........... 147
Rear door child-protectors ............. 118
Removed electronic key battery precautions .............. 647
Seat belt comfort guide ....................... 31
Seat belt extender precautions .......................................... 35
Seat belt precautions .......................... 56
Seat heater precautions ................. 570
Trunk precautions ............................... 124
Child-protectors ..................................... 118
Cleaning .......................................594, 598 Aluminum wheels ..............................595
Exterior ................................................... 594
Interior .................................................... 598
Seat belts................................................599
Clock......................................................... 562
Coat hooks ..............................................576
Condenser ...............................................622
Console box ........................................... 554
Console box light ................................. 554
Cooling system Engine overheating ...........................747
Cruise control Cruise control ..................................... 209
Dynamic radar cruise control ....... 213
C

814Alphabetical index
GS350_U (OM30C34U)
Emergency, in case ofIf the electronic key does not operate properly ........740
If the engine will not start................735
If the parking brake cannot be released........................738
If the shift lever cannot be shifted from P ............ 737
If the vehicle battery is discharged ......................................... 743
If the warning buzzer sounds................................................. 686
If the warning light turns on.......... 686
If the warning message is displayed ........................................697
If you have a flat tire .......................... 722
If you think something is wrong.............................................. 684
If your vehicle becomes stuck ...................................................... 749
If your vehicle has to be stopped in an emergency .......... 677
If your vehicle needs to be towed ...................................... 678
If your vehicle overheats ................ 747
Emergency flashers ............................. 676
Engine Accessory mode.................................. 172
Compartment ....................................... 615
Engine switch .......................................... 171
Hood ......................................................... 612
How to start the engine ..................... 171
Identification number .......................753
If the engine will not start................735
Ignition switch (engine switch) ................................... 171
Overheating ......................................... 747 Engine compartment cover............... 616
Engine coolant ...................................... 620
Capacity ................................................. 756
Checking ............................................... 620
Preparing and checking before winter .................................... 298
Engine coolant temperature gauge ......................................................... 79
Engine immobilizer system ................. 68
Engine oil ................................................... 617 Capacity ................................................. 754
Checking ................................................. 617
Oil level warning message ........... 706
Oil pressure warning message.......................... 698
Preparing and checking before winter .................................... 298
Engine oil maintenance data ........... 602
Engine switch .............................................171
Enhanced VSC ..................................... 268
EPS (Electronic Power Steering) .........269Function .................................................. 269
Warning light ....................................... 687
Warning message............................. 702
Event data recorder (EDR)................... 10