2019 LEXUS LX570 coolant temperature

555
LX570_OM_OM60R07U_(U) 7
When trouble arises 7-2. Steps to take in an emergency
If your vehicle overheats Stop the vehicle in a safe place and tu rn 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 suff iciently, inspect th e hoses and radiator
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. ●
The needle of the engine coolant temperature gauge (  P. 92) enters the
red zone or a loss of engine power is experienced. (For example, the vehicle
speed does not increase.) ●
Steam is coming from under the hood.
Correction procedures 1
2
3
1
2

556 7-2. Steps to take in an emergency
LX570_OM_OM60R07U_(U) The coolant level is satisfactory if it is between the “F” and “L” lines on the res-
ervoir.
Reservoir
“F” line
“L” line
Radiator cap
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 air
conditioning condenser cooling fans op erate 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. 4
1
2
3
4
5
6
7

5577-2. Steps to take in an emergency
LX570_OM_OM60R07U_(U) 7
When trouble arises WARNING ■
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.

621Alphabetical index
LX570_OM_OM60R07U_(U) Engine
Accessory mode.................................. 212
Air cleaner ............................................. 473
Compartment......................................475
Engine switch .......................................... 211
Exhaust gas precautions ................... 73
Hood ........................................................ 474
How to start the engine ..................... 211
Identification number ...................... 563
If the engine will not start................547
If your vehicle has to be
stopped in an emergency ........... 513
Ignition switch (engine
switch) ..................................................... 211
Overheating ........................................ 555
Engine compartment cover ............. 476
Engine coolant.......................................480
Capacity ................................................ 566
Checking............................................... 480
Preparing and checking
before winter ................................... 388
Engine coolant temperature
gauge ........................................................ 92
Engine immobilizer system ................. 80
Engine oil ..................................................477
Capacity ................................................ 564
Checking................................................ 477
Preparing and checking
before winter ................................... 388 Engine switch (ignition switch) ...........211
Engine switch light
(ignition switch light)........................ 423
Event data recorder (EDR)................... 10
Exhaust gas precautions ....................... 73
First-aid kit holder .................................434
Flat tire ...................................................... 535
Floor mats....................................................26
Fluid
Automatic transmission .................. 567
Brake....................................................... 568
Steering ................................................. 568
Washer ................................................... 487
Fog lights.................................................. 235
Replacing light bulbs ........................ 510
Switch ...................................................... 235
Footwell lights .........................................423
Four-wheel AHC (Active Height
Control Suspension) .........................301
Easy access mode ............................303
Disabling the height control .........304
Selecting vehicle height................... 301
Four-wheel drive system
Center differential
lock/unlock ........................................ 310
Four-wheel drive control
switch ...................................................309
Warning light ....................................... 525
Front automatic air conditioning
system .................................................... 405
Front doors .................................................121 F
* : Refer to
the “NAVIGATION SYSTEM OWNER’S MANUAL”.