2016 Lexus GS F radiator

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GS350_200t_GS F_OM_OM30E86U_(U)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 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 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
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2
3
1
2

5307-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30E86U_(U)
Add coolant if necessary.
Water can be used in an emergency if coolant is unavailable.
Start the engine and turn the air conditioning system on to check that the radi-
ator cooling fans operate and to check for coolant leaks from the radiator or
hoses.
The fans operate when the air conditioning system is turned on immediately after a
cold start. Confirm that the fans are operating by checking the fan sound and air flow.
If it is difficult to check these, turn the air conditioning system on and off repeatedly.
(The fans may not operate in freezing temperatures.)
If the fans are not operating:
Stop the engine immediately and contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Lexus dealer.
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XGS350XGS F
XGS200t
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7

5327-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30E86U_(U)
WA R N I N G
■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 (especially a tie, a scarf or a muffler) away from the fans and
belts. Failure to do so may cause the hands or clothing to be caught, resulting in seri-
ous injury.
●GS350: Do not loosen the coolant inlet cap
or the engine coolant reservoir cap while the
engine and radiator are hot.
High temperature steam or coolant could
spray out.
●GS F: Do not loosen the engine coolant res-
ervoir cap while the engine and radiator are
hot.
High temperature steam or coolant could
spray out.
●GS200t: Do not loosen the coolant inlet cap,
the engine coolant reservoir cap or the inter-
cooler coolant reservoir cap while the engine
and radiator are hot.
High temperature steam or coolant could
spray out.

615Alphabetical index
GS350_200t_GS F_OM_OM30E86U_(U)
Radar cruise control (dynamic radar cruise control) ........................ 278
Radar cruise control (dynamic
radar cruise control with
full-speed range) ............................... 266
Radiator ....................................................408
Radio
*
RBDS (Radio Broadcast Data Systems)
*
Rear air conditioning system ........... 339
Rear door sunshades ............................361
Rear personal lights............................. 348
Rear side marker lights ........................215
Light switch ............................................ 215
Replacing light bulbs ........................439
Welcome light illumination control ......................... 138
Rear seat heaters.................................. 343
Rear sunshade .........................................361 Operation ............................................... 361
Reverse operation feature.............362 Rear turn signal lights ......................... 209
Replacing light bulbs ....................... 439
Turn signal lever ................................. 209
Rear view mirror
Inside rear view mirror......................169
Outside rear view mirrors ................171
Rear view monitor system
*
Rear window defoggers.................... 334
Refueling................................................... 227 Capacity ...................................................541
Fuel types.................................................541
Opening the fuel tank cap ............ 228
When the fuel filler door cannot be opened ......................... 229
Remote Touch
*.....................................322
Replacing
Electronic key battery ..................... 429
Fuses .......................................................... 431
Light bulbs............................................. 437
Tires ............................................................491
Rev indicator .....................................88, 95
Rev peak .............................................88, 96
Reporting safety defects for U.S. owners .................................. 586
Resetting the message indicating maintenance is required ................ 386
R
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.