2022 LEXUS IS300 radiator

3597-2. Steps to take in an emergency
7
When trouble arises
Intercooler (IS300)Reservoir cap
“F” line
“L” line
5 Add coolant if necessary.
Water can be used in an emergency if
coolant is unavailable.
Engine (IS350
AWD/IS350/IS300 AWD)
Engine (IS300)
Engine (IS500)
Intercooler (IS300)
6 Start the engine and turn the air
conditioning system on to check
that the radiator cooling fans oper-
ate 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 oper-
ating by checking the fan sound and air
flow. If it is difficult to check these, turn the
air conditioning system on and off repeat-
edly. (The fans may not operate in freezing
temperatures.)
7 If the fans are not operating:
Stop the engine immediately and
contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the
nearest Lexus dealer.
8 Check if “Engine Coolant Temp
High Stop in a Safe Place See
Owner’s Manual” is shown on the
A
B
C

3607-2. Steps to take in an emergency
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.
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
hood, do not open the hood until the
steam has subsided. The engine com-
partment 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
serious injury.
●IS350 AWD/IS350/IS300 AWD:
Do not loosen the coolant inlet cap or
coolant reservoir cap while the engine
and radiator are hot. (The coolant inlet
cap is located under the engine cover.)
High temperature steam or coolant
could spray out.
●IS300: Do not loosen the coolant inlet
cap, coolant reservoir cap, or inter-
cooler reservoir cap while the engine
and radiator are hot. High tempera-
ture steam or coolant could spray out.
●IS500: Do not loosen the coolant inlet
cap or coolant reservoir cap while the
engine and radiator are hot. High tem-
perature 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 sys-
tem
Observe the following precautions:
●Avoid contaminating the coolant with
foreign matter (such as sand or dust
etc.).

422Alphabetical Index
Parking Support Brake function (static objects) ......................................................... 222 Function ...........................................................222
PCS (Pre-Collision System) Function ........................................................... 165
PCS OFF switch ......................................... 168
Warning light ............................................... 334
Personal lights............................................... 253
PKSA (Parking Support Alert) ................201
PKSB (Parking Support Brake)...............216 Warning message..................................... 220
Power easy access system ....................... 104
Power outlets ..................................................261
Power steering (Elect ric power steering
system).......................................................... 229 Warning light ............................................... 332
Power window switch lights .................... 253
Power windows Door lock linked window operation... 115
Jam protection function..............................114
Operation..........................................................114
Window lock switch ................................... 115
Pre-Collision System (PCS) Function ........................................................... 165
PCS OFF switch ......................................... 168
Warning light ............................................... 334
R
Radar cruise control (dynamic radar cruise control with full-speed range)...............187
Radiator ........................................................... 293
RCTA Function ............................................................210
Warning message.........................................211
RCTA (Rear Cross Traffic Alert) ...........201
RCTA function ................................................ 211
Rear Cross Traffic Alert (RCTA) ...........210
Rear seats ........................................................ 103 Head restraints .............................................107
Rear side marker lights Light switch .....................................................145
Rear sunshades ............................................ 262 Rear turn signal lights
Replacing light bulbs....................... 314, 316
Turn signal lever .......................................... 138
Wattage ..........................................................375
Rear view mirror Inside rear view mirror ............................... 110
Outside rear view mirrors........................ 112
Rear window defogger ............................. 245
Refueling Capacity ......................................................... 367
Fuel types ....................................................... 367
If the fuel filler do or cannot be opened
........................................................................... 351
Opening the fuel tank cap ......................157
Remote Touch .............................................. 238
Replacing Electronic key battery ............................. 308
Fuses.................................................................. 310
Light bulbs ...................................................... 313
Tires ....................................................................341
Resetting the message indicating mainte- nance is required ...................................... 278
Rev indicator .....................................................72
Rev peak..............................................................73
Road Sign Assist .............. ............................. 184
RSA (Road Sign Assist) ............................. 184
S
Seat belt reminder light............................. 332
Seat belts............................................................ 24 Automatic Locking Retractor................. 26
Child restraint system installation ......... 42
Cleaning and maintaining the seat belt.......................................................................... 274
Emergency Locking Retractor .............. 26
How to wear your seat belt ..................... 25
How your child should wear the seat belt
............................................................................. 25
Pregnant women, proper seat belt use ............................................................................. 24
Reminder light and buzzer ................... 332
Seat belt extender......................................... 25