2018 Lexus GX460 radiator

5657-2. Steps to take in an emergency
GX460_OM_OM60Q09U_(U)
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When trouble arises
The coolant level is satisfactory if it is between the “F” and “L” lines on the res-
ervoir. Reservoir
“F”
“L”
Radiator cap
Add coolant if necessary.
Water can be used in an emergency if
coolant is unavailable.
Start the engine and turn the air conditio ning 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 an d contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Lexus dealer.
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5667-2. Steps to take in an emergency
GX460_OM_OM60Q09U_(U)
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 h ood, 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.
●Do not loosen the radiator cap or the cool ant reservoir cap while the engine and radi-
ator are hot. High temperature steam or coolant could spray out.
NOTICE
■When adding engine coolant
Add coolant slowly after the engine has cool ed 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 foreig n matter (such as sand or dust etc.).
●Do not use any coolant additive.

633Alphabetical index
GX460_OM_OM60Q09U_(U)
Power outlet ........................................... 423
Power windows ...................................... 150Jam protection function ..................... 151
Operation ............................................... 150
Window lock switch.......................... 150
Pre-Collision System (PCS) ............ 368 Function ................................................. 368
PCS OFF switch ............................... 369
Warning light ........................................ 521
Radiator .................................................... 469
Radio
*
Rear seat .................................................... 124 Adjustment ..............................................124
Rear turn signal lights .........................200 Replacing light bulbs ....................... 503
Turn signal lever ................................ 200
Wattage ..................................................579
Rear view mirror Inside rear view mirror ..................... 145
Outside rear view mirrors ...............147
Rear view monitor system ................ 254
Rear window defogger ........................391
Rear window wiper............................... 218
Refueling .................................................... 221 Capacity ................................................. 572
Fuel types ..................................... 221, 572
Opening the fuel tank cap............. 223 Replacing
Electronic key battery .......................491
Fuses ........................................................ 493
Light bulbs.............................................498
Tires .......................................................... 542
Wireless remote control battery ....................................................491
Reporting safety defects for U.S. owners .................................. 608
Reset the maintenance data ............ 453
Safety connect....................................... 439
Seat belts .................................................... 30 Adjusting the seat belt.......................... 31
Automatic Locking Retractor .........32
Child restraint system installation ............................................. 59
Cleaning and maintaining the seat belt .......................................450
Emergency Locking Retractor.................................................32
How to wear your seat belt............. 30
How your child should wear the seat belt ...........................................32
Pregnant women, proper seat belt use......................... 33
Reminder light and buzzer ........... 522
Seat belt pretensioners........................ 31
Seat belt extender .................................32
SRS warning light ..............................520
R
S
*: For vehicles with a navigation system or a multimedia system, refer to the “NAVIGATION SYSTEM OWNER’S MANUAL” or“MULTIMEDIA OWNER’S MANUAL”.