2015 LEXUS LS600H coolant temperature

5327-2. Steps to take in an emergency
LS600hL_U(OM50E41U)
Start the hybrid system and turn the air conditioning system on to
check that the radiator cooling fan operates and to check for coolant
leaks from the radiator or hoses.
The fan operates when the air conditioning system is turned on immediately
after a cold start. Confirm that the fan is 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 fan may not operate in freezing temperatures.)
If the fan is not operating:
Stop the hybrid system immediately and contact your Lexus dealer.
If the fan is operating:
Have the vehicle inspected at the nearest Lexus dealer.
■If “Hybrid System Overheat” is shown on the multi-information dis-
play
Stop the vehicle in a safe place.
Stop the hybrid system and carefully lift the hood.
After the hybrid system has
cooled down, inspect the
hoses and radiator core (radia-
tor) for any leaks.Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact your
Lexus dealer.
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5347-2. Steps to take in an emergency
LS600hL_U(OM50E41U)
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.
●After the hybrid system has been turned off, check that the indicator on the
power switch and the “READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automatically
start, or the cooling fan may suddenly oper ate even if the gasoline engine stops.
Do not touch or approach rotating parts such as the fan, which may lead to fin-
gers or clothing (especially a tie, a scarf or a muffler) getting caught, resulting in
serious injury.
NOTICE
■When adding engine/power control unit coolant
Add coolant slowly after the hybrid syst em has cooled down sufficiently. Adding
cool coolant to a hot hybrid system too quickly can cause da mage to the hybrid
system.
■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 additive.
●Do not loosen the coolant reservoir caps
while the hybrid system and radiator are
hot.
High temperature steam or coolant could
spray out.

603Alphabetical index
LS600hL_U(OM50E41U)
Energy monitor ........................................ 113
EngineACCESSORY mode........................ 217
Compartment......................................439
Engine switch ........................................ 216
Hood ........................................................436
How to start the hy brid system .... 216
Identification number ...................... 539
If the hybrid system will not start......................................... 517
Ignition switch (power switch).................................. 216
Overheating ........................................ 530
Power switch......................................... 216
Engine compartment cover ............. 440
Engine coolant....................................... 445 Capacity .................................................543
Checking................................................445
Preparing and checking before winter ....................................325
Engine coolant temperature gauge ........................................................ 99
Engine oil ................................................. 442 Capacity .................................................. 541
Checking................................................ 442
Preparing and checking before winter ....................................325
Engine switch ...........................................216
EPS (Electric Power Steering) .............. 290 Function ................................................. 290
Warning light .......................................494
EV drive mode......................................... 221
Event data recorder (EDR) .................... 11 First-aid kit storage belt......................375
Flat tire
Vehicles with a spare tire ............. 506
Vehicles with run-flat tires.............. 515
Floor mats....................................................32
Fluid Brake........................................................545
Hybrid transmission ......................... 544
Washer ................................................... 449
Fog lights...................................................243 Replacing light bulbs .........................481
Switch ...................................................... 243
Footwell light .......................................... 360
Front automatic air conditioning system .................................................... 336
Front fog lights........................................243 Replacing light bulbs .........................481
Switch ...................................................... 243
Front passenger occupant classification system ........................... 55
Front seats ................................................. 156 Adjustment..............................................156
Cleaning................................................. 422
Climate control seats ...................... 387
Correct driving posture .................... 34
Driving position memory................. 172
Head restraints ..................................... 179
Power easy access system .............159
Seat position memory ....................... 172
Front side marker lights......................234 Light switch........................................... 234
Replacing light bulbs .........................481
Welcome light illumination control.................................................... 126F

608Alphabetical index
LS600hL_U(OM50E41U)
Odometer .................................................. 99
OilEngine oil................................................. 541
Front differential oil............................544
Rear differential oil ............................ 545
Opener Fuel filler door ....................................... 251
Hood ........................................................436
Trunk ......................................................... 149
Outer foot lights Location ................................................. 360
Replacing light bulbs ......................... 481
Outside rear view mirrors ................. 185 Adjusting and folding........................ 185
BSM (Blind Spot Monitor)........... 308
Linked mirror function when reversing ................................. 187
Mirror position memory ................... 172
Outside rear view mirror defoggers ........................... 358
Outside temperature display ............. 99
Overheating ...........................................530
Parking brake......................................... 228 If the parking brake cannot be released ....................... 520
Operation ..............................................228
Parking brake engaged warning buzzer .............................. 230 Parking lights ..........................................234
Light switch........................................... 234
Replacing light bulbs .........................481
Welcome light illumination control .......................... 126
PCS (Pre-Collision System).............296 Function .................................................. 296
Pre-collision braking off switch............................................. 298
Warning light ....................................... 495
Pelvic support seat with seat vibrator.................................................... 166
Personal lights ........................................362 Front personal light........................... 362
Rear personal light ............................ 362
Power control unit .................................... 81
Power control unit coolant................446 Capacity................................................. 543
Checking ............................................... 446
Preparing and checking before winter.................................................... 325
Power easy access system ................. 159
Power outlets ......................................... 382
Power steering (Electric Power Steering system)................................ 290 Warning light ....................................... 494
Power switch............................................ 216
Power trunk opener and closer ....... 149
Power windows.......................................189 Door lock linked window operation ............................ 191
Jam protection function................... 190
Operation............................................... 189
Window lock switch ......................... 189
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