2015 Lexus GX460 cooling

5577-2. Steps to take in an emergency
GX460_OM_OM60L72U_(U)
7
When trouble arises
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 coolant 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 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 any coolant additives.

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GX460_OM_OM60L72U_(U)8-1. Specifications
Cooling system
Capacity
(reference)With rear heater16.3 qt. (15.4 L, 13.6 Imp.qt.)
Without rear heater14.5 qt. (13.7 L, 12.1 Imp.qt.)
Coolant typeUse either of the following:
• “Toyota Super Long Life Coolant”
• A similar high-quality ethylene glycol-basednon-silicate, non-amine, non-nitrite, and
non-borate coolant with long-life hybrid
organic acid technology
Do not use plain water alone.
Ignition system (spark plug)
MakeDENSO SK20HR11
Gap0.043 in. (1.1 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.

620Alphabetical index
GX460_OM_OM60L72U_(U)
Condenser ................................................461
Console box ...........................................400
Cool box ....................................................413
Cooling system ..................................... 459Engine overheating.......................... 555
Conversation mirror .............................416
Crawl Control ....................................... 340
Cruise control Cruise control....................................... 218
Dynamic radar cruise control........221
Cup holders ............................................ 402
Curtain shield airbags ........................... 34
Current fuel consumption ................... 83
Customizable features ....................... 586
DAC (Downhill Assist Control system)................................................... 343
Daytime running light system ........... 198
Defogger Front windshield ................................ 384
Outside rear view mirrors ............ 385
Rear window ....................................... 385
Differential ............................................... 567
Dimension ............................................... 562
Display Multi-information display .................. 82
Trip information .....................................83
Warning message .............................. 519
Do-it-yourself maintenance ...............451
Doors............................................................ 94 Back door ............................................. 101
Door glasses ......................................... 146
Door lock .................................................. 94
Open door warning light................ 513
Outside rear view mirrors .............. 143
Rear door child-protector................ 97 Driver’s seat position memory........... 131
Driving ........................................................ 154
AVS switch ........................................... 335
Break-in tips .......................................... 155
Correct posture .................................... 26
Procedures .............................................154
Winter drive tips .................................. 371
Dynamic radar cruise control ........... 221
Eco Driving Indicator ............................ 86
EDR (Event data recorder)................... 10
Electronic key ........................................... 90 Battery-saving function ......................113
If the electronic key does not operate properly ............................549
Replacing the battery ......................483
Emergency, in case of If the electronic key does not operate properly ............................549
If the engine will not start ............... 546
If the shift lever cannot be shifted from P ...................................548
If the vehicle has discharged battery ........................ 552
If the warning buzzer sounds .................................................... 511
If the warning light turns on ............. 511
If you have a flat tire .......................... 533
If you lose your keys...........................614
If you think something is wrong.................................................. 509
If your vehicle becomes stuck..................................................... 558
If your vehicle needs to be towed ...................................................504
If your vehicle overheats ................555
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