coolant temperature LEXUS IS350 2022 User Guide

3277-2. Steps to take in an emergency
7
When trouble arises
Fluid leaks under the vehicle.
(Water dripping from the air condi-
tioning after use is normal.)
 Flat-looking tires or uneven tire
wear
 Engine coolant temperature gauge
needle continually points higher
than normal.
 Changes in exhaust sound
 Excessive tire squeal when corner-
ing
 Strange noises related to the sus-
pension system
 Pinging or other noises related to
the engine
 Engine missing, stumbling or run-
ning roughly
 Appreciable loss of power
 Vehicle pulls heavily to one side
when braking 
Vehicle pulls heavily to one side
when driving on a level road
 Loss of brake effectiveness, spongy
feeling, pedal almost touches the
floor
If you think something is
wrong
If you notice any of the following
symptoms, your vehicle probably
needs adjustment or repair. Con-
tact your Lexus dealer as soon as
possible.
Visible symptoms
Audible symptoms
Operational symptoms

3297-2. Steps to take in an emergency
7
When trouble arises
■Brake system warning light (warning buzzer)
■Brake system warning light (warning buzzer)
■High coolant temperature warning light* (warning buzzer)
*: This light illuminates on the multi-information display.
If a warning light turns on or a warning buzzer sounds
Calmly perform the followin g actions if any of the warning lights comes on or
flashes. If a light comes on or flashes, bu t then goes off, this does not necessar-
ily indicate a malfunction in the system. However, if this continues to occur,
have the vehicle inspected by your Lexus dealer.
Actions to the warning lights or warning buzzers
Warning lightDetails/Actions
(U.S.A.)
or
(red)
(Canada)
Indicates that:
 The brake fluid level is low; or
 The brake system is malfunctioning
 Immediately stop the vehicle in a safe place and contact your Lexus
dealer. Continuing to drive the vehicle may be dangerous.
Warning lightDetails/Actions
(yellow)
Indicates a malfunction in the parking brake system
 Have the vehicle inspected by your Lexus dealer immediately.
Warning lightDetails/Actions
Indicates that the engine coolant temperature is too high
Immediately stop the vehicle in a safe place.
Handling method ( P.357)

3577-2. Steps to take in an emergency
7
When trouble arises
1Stop the vehicle in a safe place and
turn off the air conditioning system,
and then stop the engine.
2 If you see steam:
Carefully lift the hood after the
steam subsides.
If you do not see steam:
Carefully lift the hood.
3 After the engine has cooled down
sufficiently, inspect the hoses and
radiator core (radiator) for any
leaks.
WARNING
●When working with the battery, always
wear safety glasses and take care not
to allow any battery fluids (acid) to
come into contact with skin, clothing
or the vehicle body.
●Do not lean over the battery.
●In the event that battery fluid comes
into contact with the skin or eyes,
immediately wash the affected area
with water and seek medical attention.
Place a wet sponge or cloth over the
affected area until medical attention
can be received.
●Always wash your hands after handling
the battery support, terminals, and
other battery-related parts.
●Do not allow children near the battery.
NOTICE
■When handling jumper cables
When connecting the jumper cables,
ensure that they do not become entan-
gled in the cooling fans or engine drive
belt.
If your vehicle overheats
The following may indicate that
your vehicle is overheating.
 The needle of the engine coolant
temperature gauge ( P.69)
enters the red zone or a loss of
engine power is experienced.
(For example, the vehicle speed
does not increase.)
 “Engine Coolant Temp High Stop
in a Safe Place See Owner’s
Manual” is shown on the
multi-information display.
 Steam comes out from under the
hood.
Correction procedures

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.).

3698-1. Specifications
8
Vehicle specifications
cold startability. Oils with a lower
value before the W allow for easier
starting of the engine in cold
weather.
• The 30 in 5W-30 indicates the vis- cosity characteristic of the oil when
the oil is at high temperature. An oil
with a higher viscosity (one with a
higher value) may be better suited if
the vehicle is operated at high
speeds, or under extreme load con-
ditions.
How to read oil container label: The International Lubricant Specifica-
tion Advisory Committee (ILSAC)
Certification Mark is
added to some oil
containers to help you select the oil you
should use.
*: The fluid capacity is a reference quantity. If replacement is necessary, contact your Lexus dealer.
Cooling system
Capacity*
IS350
AWD/IS350
/IS300 AWD
9.8 qt. (9.3 L, 8.2 Imp. qt.)
IS300
Engine
9.1 qt. (8.6 L, 7.6 Imp. qt.)
Intercooler
3.0 qt. (2.8 L, 2.5 Imp. qt.)
IS50012.0 qt. (11.4 L, 10.0 Imp. qt.)
Coolant type
Use either of the following:
 “Toyota Super Long Life Coolant”
 Similar high-quality ethylene glycol-based non-silicate,
non-amine, non-nitrite, and non-borate coolant with
long-life hybrid orga nic acid technology
Do not use plain water alone.

3828-1. Specifications
cornering (turning) traction.
■Temperature A, B, C
The temperature grades are A (the
highest), B, and C, representing the
tire’s resistance to the generation of
heat and its ability to dissipate heat
when tested under controlled condi-
tions on a specified indoor laboratory
test wheel.
Sustained high temperature can cause the
material of the tire to degenerate and
reduce tire life, and excessive temperature
can lead to sudden tire failure. Grade C corresponds to
a level of perfor-
mance which all passenger car tires must
meet under the Federal Motor Vehicle
Safety Standard No. 109.
Grades B and A represent higher levels of
performance on the laboratory test wheel
than the minimum required by law.
Warning: The temperatur e grades of a tire
assume that it is properly inflated and not
overloaded.
Excessive speed, unde rinflation, or exces-
sive loading, either separately or in combi-
nation, can cause heat buildup and
possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pressure
Tire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Maximum inflation pressureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation pressureCold tire inflation pressure recommended by a
manufacturer
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic trans-
mission, power steering, power brakes, power win-
dows, power seats, radio and heater, to the extent
that these items are available as factory-installed
equipment (whether installed or not)
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil
and coolant, and if so equipped, air conditioning
and additional weight optional engine

418Alphabetical Index
Hood................................................................285
How to start the engine ........................... 130
Identification number ...............................365
If the engine will not start ....................... 349
If your vehicle has to be stopped in an
emergency ................................................ 320
Ignition switch (engine switch) ............ 130
Overheating................................................. 357
Tachometer ............................................ 69, 70
Engine coolant Capacity .........................................................369
Checking ....................................................... 292
Preparing and checking before winter......................................................................... 234
Engine coolant temperature gauge 69, 70
Engine immobilizer system ........................ 60
Engine oil Capacity ......................................................... 367
Checking .......................................................289
Preparing and checking before winter......................................................................... 234
Warning light ...............................................330
Engine oil maintenance data ....................291
Engine oil pressure gauge ...........................79
Engine oil temperature gauge ...................79
Engine switch ................................................. 130 Auto power off function ........................... 132
Changing the engine switch modes.. 132
If your vehicle has to be stopped in an
emergency ................................................ 320
Enhanced Vehicle Stability Control (Enhanced VSC) ...................................... 229
Enhanced VSC (Enhanced Vehicle Stabil- ity Control) .................................................. 229
EPS (Electric Power Steering) .............. 229 Warning light ............................................... 332
Event data recorder (EDR) ............................7
F
First-aid kit storage belt ............................ 258
Flat tire Tire pressure warning system ............. 299 Vehicles with a spare tire.........................341
Floor mats ...........................................................22
Fluid Automatic transmission ..........................370
Brake ..................................................................371
Washer ...........................................................296
Footwell lights ............................................... 253 Wattage ..........................................................375
Front passenger occupant classification system .............................................................. 36
Front seats Adjustment ..................................................... 102
Cleaning ......................................................... 274
Correct driving posture ............................ 23
Driving position memory ........................ 104
Head restraints............................................. 107
Memory recall function............................ 105
Power easy access system .................... 104
Seat heaters ................................................... 251
Seat position memory .............................. 104
Seat ventilators ............................................. 251
Front side marker light Light switch .................................................... 145
Replacing light bulbs ..................................314
Front turn signal lights Replacing light bulbs....................... 314, 315
Turn signal lever .......................................... 138
Wattage ..........................................................375
Fuel Capacity ......................................................... 367
Fuel gauge............................................... 69, 70
Fuel pump shut off system.....................328
Information .................................................... 376
Refueling...........................................................157
Type .................................................................. 367
Warning light ............................................... 332
Fuel consumption Average fuel economy .............................. 78
Current fuel consumption ........................ 78
Fuel filler door If the fuel filler do or cannot be opened
........................................................................... 351

425Alphabetical Index
Information .................................................... 378
Replacing .........................................................341
Rotating tires ................................................298
Size.................................................................... 372
Snow tires ...................................................... 234
Spare tire.......................................................... 341
Tire inflation pressure display function......................................................................... 299
Tire pressure warning system ............. 299
Warning light ............................................... 333
Tools.................................................................. 342
Top tether strap.................................................51
Total load capacity ...................................... 364
Towing Dinghy towing ............................................... 129
Emergency towing ................................... 323
Towing eyelet .............................................. 325
Trailer towing .................................................128
TRAC (Traction Control) ........................ 229
Traction Control (TRAC) ........................ 229
Trailer towing ..................................................128
Transmission Automatic transmission ............................134
Driving mode select switch ...................227
M mode ............................................................ 137
Paddle shift switches ....................... 136, 137
Snow mode ....................................................136
Trip meters .........................................................74
Trunk .................................................................... 94 Internal trunk release lever ...................... 96
Smart access system with push-button start ................................................................... 95
Trunk features..............................................258
Trunk lid light................................................... 95
Trunk light......................................................... 95
Trunk opener main switch ....................... 96
Trunk opener switch ................................... 95
Wireless remote control........................... 95
Trunk lid light .................................................... 95
Trunk light .......................................................... 95 Wattage.......................................................... 375 Turn signal lights
Replacing light bulbs ..................................314
Turn signal lever .......................................... 138
V
Vanity lights...................................................... 261Wattage ..........................................................375
Vanity mirrors ................................................. 261
VDIM (Vehicle Dynamics Integrated Man- agement)...................................................... 229
Vehicle data recording ....................................6
Vehicle Dynamics Integrated Manage- ment (VDIM).............................................. 229
Vehicle identification number ................ 364
Vehicle Stability Control (VSC) ........... 229
Ventilators (seat ventilators).....................251
VSC (Vehicle Stability Control) ........... 229
W
Warning buzzers ABS.................................................................... 331
Airbags........................................................... 330
Approach warning......................................192
Brake hold .....................................................335
Brake Override System .......................... 331
Brake system................................................329
Charging system....................................... 330
Downshifting ....................................... 137, 138
Drive-Start Control.................................... 331
Electric power steering........................... 332
Engine............................................................. 330
Hands off steering wheel warning (LTA)........................................................................... 183
High coolant temperature.....................329
Intuitive parking assist ................. 209, 333
Low engine oil pressure........................ 330
LTA (Lane Tracing Assist)175, 178, 333
Open door ................................................91, 93
Open window ................................................ 115
PKSA (Parking Support Alert) ...........202
PKSB (Parking Support Brake) .........334

426Alphabetical Index
Pre-collision braking.................................. 167
RCTA (Rear Cross Traffic Alert) ...... 334
Seat belt .......................................................... 332
Warning lights............................................... 329 ABS ....................................................................331
Brake hold operated indicator ........... 335
Brake Override System ...........................331
Brake system ............................................... 329
Charging system .......................................330
Drive-Start Control ....................................331
Electric power steering .......................... 332
High coolant temperature .................... 329
Intuitive parking assist OFF indicator333
Low engine oil pressure.........................330
Low fuel level ............................................... 332
LTA indicator ............................................... 333
Malfunction indicator lamp...................330
Parking brake indicator .......................... 335
PKSB OFF indicator ................................ 334
Pre-collision system ................................. 334
RCTA OFF indicator............................... 334
Seat belt reminder light .......................... 332
Slip indicator ................................................ 335
SRS....................................................................330
Tire pressure ................................................ 333
Warning messages ..................................... 338
Washer Adding ............................................................ 296
Preparing and checking before winter......................................................................... 234
Switch ............................................................... 150
Washing and waxing.................................. 270
Weight Cargo capacity.............................................128
Load limits .......................................................128
Weight ............................................................ 364
Wheels ............................................................. 305 Size.................................................................... 372
Window lock switch ...................................... 115
Windows Power windows..............................................114
Rear window defogger .......................... 245 Washer ............................................................ 150
Windshield wipers ....................................... 150
Winter driving tips....................................... 234
Wireless remote control Battery-Saving Function............................98
Locking/Unlocking .................................... 88
Replacing the battery .............................. 308
For information regarding the equipment listed below, refer to
the “NAVIGATION AND MULTI-
MEDIA SYSTEM OWNER’S
MANUAL”.
· Navigation system
· Audio/visual system
· Lexus parking assist monitor
· Lexus Enform