coolant temperature Lexus GX460 2020 / LEXUS 2020 GX460 (OM60R27U) User Guide

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GX460_OM_OM60R27U_(U)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 the 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. 88) 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
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5477-2. Steps to take in an emergency
GX460_OM_OM60R27U_(U)
7
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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5487-2. Steps to take in an emergency
GX460_OM_OM60R27U_(U)
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.

616Alphabetical index
GX460_OM_OM60R27U_(U)
Size ........................................................... 560
Snow tires ..............................................367
Spare tire ................................................524
Tire pressure warning system ................................................. 465
Tools........................................................... 525
Towing Dinghy towing ...................................... 195
Emergency towing........................... 505
Towing hooks ..................................... 506
Trailer Sway Control ........................352
Trailer towing ......................................... 177
Trailer Sway Control........................... 352
TRAC (Traction Control) .................. 351
Transmission Automatic transmission ..................202
AVS switch ...........................................339
If the shift lever cannot be shifted from P .................................. 205
Trip meters ................................................. 88
Turn signal lights ................................... 207 Replacing light bulbs............................. 493, 494, 497
Turn signal lever .................................207
Wattage ................................................... 561
USB port
*
Vanity lights Vanity lights ............................................. 411
Wattage ................................................... 561
Vanity mirrors ........................................... 411
Vehicle identification number ......... 553
VSC (Vehicle Stability Control) ..... 351 Warning buzzers .................................... 511
Brake system .......................................... 511
Downshifting ........................................205
Intuitive parking assist...................... 269
LDA (Lane Departure Alert)....... 246
Open back door................................... 110
Open door .............................................. 110
Pre-collision warning....................... 235
Radar cruise control .......................... 261
Seat belt remainder ............................513
Warning lights .......................................... 511 ABS ............................................................ 512
Brake Override System ...................514
Brake system .......................................... 511
Charging system .................................. 511
Drive-Start Control ............................514
High coolant temperature ............... 511
KDSS.......................................................... 512
Low engine oil pressure ................... 511
Low fuel level .........................................513
Malfunction indicator lamp.............. 511
Open door .............................................513
Parking brake indicator .................... 512
PCS ............................................................ 512
Seat belt reminder light ....................513
Slip indicator .......................................... 512
SRS............................................................... 511
Tire pressure warning light .............513
Warning message................................ 520
Warning reflector holder.................. 402
Washer ....................................................... 218 Checking ............................................... 463
Preparing and checking before winter .................................... 367
Switch ........................................................218
Washing and waxing ...........................434
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