coolant temperature LEXUS RX350 2019 User Guide

6938-2. Steps to take in an emergency
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When trouble arises
RX350/RX350L_U 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.
Check if “Engine Coolant Temp High St op in a Safe Place See Owner’s Man-
ual” is shown on the multi-information display.
If the message does not disappear:
Stop the engine and contact your Lexus dealer.
If the message is not displayed:
Have the vehicle inspected at the nearest Lexus dealer. 5
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694 8-2. Steps to take in an emergency
RX350/RX350L_U WARNING ■
To prevent an accident or injury 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 and the c oolant reservoir cap while the engine and
radiator 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.

762 Alphabetical index
RX350/RX350L_U Eco drive mode ..................................... 373
Eco Driving Indicator........................... 105
EDR (Event data recorder) ...................10
Electric Power Steering (EPS) ....... 378
Warning light ...................................... 655
Electronic key ......................................... 120
Battery-saving function .....................147
If the electronic key does not
operate properly............................ 684
Replacing the battery .......................623
Emergency flashers ............................. 644
Emergency, in case of
If a warning buzzer sounds.......... 654
If a warning light turns on.............. 654
If a warning message is
displayed.............................................. 661
If the battery is discharged ........... 687
If the electronic key does not
operate properly............................ 684
If the engine will not start............... 682
If you have a flat tire ......................... 666
If you lose your keys .................. 121, 123
If you think something is
wrong ...................................................652
If your vehicle becomes stuck .... 695
If your vehicle has to
be stopped in an emergency .. 645
If your vehicle needs to be
towed................................................... 646
If your vehicle overheats ................692 Engine
ACCESSORY mode ..................... 232
Compartment ..................................... 594
Engine switch ........................................ 231
Hood........................................................ 592
How to start the engine.................... 231
Identification number.......................700
If your vehicle has to be
stopped in an emergency.......... 645
Ignition switch (engine switch) ..... 231
Overheating......................................... 692
Engine coolant
Capacity................................................. 702
Checking .............................................. 598
Preparing and checking
before winter ....................................384
Engine coolant temperature
gauge ........................................................ 86
Engine immobilizer system .................. 74
Engine oil
Capacity.................................................700
Checking ...............................................595
Preparing and checking
before winter ....................................384
Engine oil maintenance data ............597
Engine switch ........................................... 231
Enhanced VSC ..................................... 378
EPS
(Electronic Power Steering) ........ 378
Warning light .......................................655
Event data recorder (EDR)................... 10E