air conditioning LEXUS RC300 2021 Owner's Manual

241
6
6
Maintenance and care
Maintenance and care
.6-1. Maintenance and careCleaning and protecting the vehi-cle exterior ................................ 242
Cleaning and protecting the vehi- cle interior ................................. 245
6-2. Maintenance Maintenance requirements........................................................ 248
General maintenance ............. 249
Emission inspection and mainte- nance (I/M) programs ......... 252
6-3. Do-it-yourself maintenance Do-it-yourself service precautions........................................................ 253
Hood............................................... 255
Positioning a floor jack............ 255
Engine compartment............... 257
Tires ................................................ 265
Tire inflation pressure .............. 273
Wheels........................................... 274
Air conditioning filter...............275
Electronic key battery ............. 277
Checking and replacing fuses ........................................................ 278
Headlight aim.............................. 280
Light bulbs ..................................... 281

2456-1. Maintenance and care
6
Maintenance and care
Remove dirt and dust using a vac-
uum cleaner. Wipe dirty surfaces
with a cloth dampened with luke-
warm water.
 If dirt cannot be removed, wipe it off
with a soft cloth dampened with
neutral detergent diluted to approx-
imately 1%.
Wring out any excess water from the cloth
and thoroughly wipe off remaining traces
of detergent and water.
■Shampooing the carpets
There are several commercial foaming-type
cleaners available. Use a sponge or brush
to apply the foam. Rub in overlapping cir-
cles. Do not use water. Wipe dirty surfaces
and let them dry. Excellent results are
obtained by keeping the carpet as dry as
possible.
■Handling the seat belts
Clean with mild soap and lukewarm water
using a cloth or sponge. Also check the
belts periodically for excessive wear, fraying
or cuts.
■When cleaning the carpeted portions of
the glove box, console box, etc.
If a strong adhesive ta pe is used, there is a
possibility that the su rface of the carpet
could be damaged.
NOTICE
• Brake parts
●Keep the cleaning nozzle at least 11.9
in. (30 cm) away from the vehicle
body. Otherwise resin section, such as
moldings and bumpers, may be
deformed and damaged.
Also, do not continuously hold the nozzle
in the same place.
●Do not spray the lower part of the
windshield continuously.
If water enters the air conditioning sys-
tem intake located near the lower part of
the windshield, the ai r conditioning sys-
tem may not operate correctly.
●Do not wash the underside of the vehi-
cle using a high pressure car washer.
Cleaning and protecting the
vehicle interior
Perform cleaning in a manner
appropriate to each component
and its material.
Protecting the vehicle interior

2756-3. Do-it-yourself maintenance
6
Maintenance and careUse only Lexus wheel nuts and
wrenches designed for use with
your aluminum wheels.
 When rotating, repairing or chang-
ing your tires, check that the wheel
nuts are still tight after driving 1000
miles (1600 km).
 Be careful not to damage the alumi-
num wheels when using tire chains.
 Use only Lexus genuine balance
weights or equivalent and a plastic
or rubber hammer when balancing
your wheels. 1
Turn the engine switch off.
2 Open the glove box. Lift up the side
with the stay, disconnect the stay
tabs and remove the partition by
pulling horizontally.
3 Press the tabs and remove the filter
cover.
WARNING
●Never use an inner tube in a leaking
wheel which is designed for a tubeless
tire. Doing so may result in an acci-
dent, causing death or serious injury.
NOTICE
■Replacing tire pressure warning
valves and transmitters
●Because tire repair or replacement
may affect the tire pressure warning
valves and transmitters, make sure to
have tires serviced by your Lexus
dealer or other qualified service shop.
In addition, make sure to purchase
your tire pressure warning valves and
transmitters at your Lexus dealer.
●Ensure that only ge nuine Lexus wheels
are used on your vehicle.
Tire pressure warning valves and trans-
mitters may not work properly with
non-genuine wheels.
Aluminum wheel precautions
Air conditioning filter
The air conditioning filter must be
changed regularly to maintain air
conditioning efficiency.
Removing the air conditioning
filter

2766-3. Do-it-yourself maintenance
4Press the tabs and remove the filter
case.
5 Remove the air conditioning filter
from the filter case and replace it
with a new one.
The “ UP” marks shown on the filter
and the filter case should be pointing up.
■Checking interval
Inspect and replace the air conditioning fil-
ter according to the maintenance schedule.
In dusty areas or area s with heavy traffic
flow, early replacement may be required.
(For scheduled mainte nance information,
please refer to the “Owner’s Manual Sup-
plement” or “Scheduled Maintenance”.)
■If air flow from th e vents decreases dra-
matically
The filter may be clogged. Check the filter
and replace if necessary.
■Air conditioning filter with deodorizing
function
When fragrances are placed in your vehi-
cle, the deodorizing effect may become
significantly weakened in a short period. When an air conditioning odor comes out
continuously, replace the air conditioning
filter.
NOTICE
■When using the air conditioning sys-
tem
Make sure that a filter is always installed.
Using the air conditioning system without
a filter may cause damage to the system.

3227-2. Steps to take in an emergency
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.
 RC350/RC300 AWD
WARNING
●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 engine coolant temperature
gauge ( P.66) is in the red zone
or a loss of engine power is expe-
rienced. (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

3247-2. Steps to take in an emergency
5Add coolant if necessary.
Water can be used in an emergency if
coolant is unavailable.
Engine (RC350/RC300 AWD)
 Engine (RC300)
 Intercooler (RC300)
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 oper ate in freezing tem-
peratures.)
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.
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.

3458-1. Specifications
8
Vehicle 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 Fede ral 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 temperature 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

3588-2. Customization
■Intuitive parking assist*( P.185)
*:If equipped
■Driving mode select switch ( P.199)
*:If equipped
■Automatic air conditioning system ( P.215)
■Seat heaters* ( P.223)
*:If equipped
FunctionDefault settingCustomized setting
Detection distance of the
front center sensorFarNearO—O
Detection distance of the rear
center sensorFarNearO—O
Buzzer volume21 to 3O—O
ABC
FunctionDefault settingCustomized setting
Powertrain control in custom
mode
*NormalPowerO——Eco
Chassis control in custom
mode
*NormalSportO——
Air conditioning operation in
custom mode
*NormalEcoO——
ABC
FunctionDefault settingCustomized setting
A/C auto switch operationOnOffO—O
Exhaust gas sensor sensitivityStandard-3 to 3O—O
ABC
FunctionDefault settingCustomized setting
Seat heater timer controlOffOnO—O
ABC

385Alphabetical Index
Alphabetical Index
A
A/CAir conditioning filter ............................... 275
Automatic air conditioning system .....215
Micro dust and pollen filter..................... 219
ABS (Anti-lock Brake System)................201 Warning light ............................................... 297
Active Sound Control (ASC) ................... 141
Adaptive Variable Suspension System 201
Air conditioning filter ................................. 275
Air conditioning system Air conditioning filter ............................... 275
Automatic air conditioning system .....215
Micro dust and pollen filter..................... 219
Airbags Airbag operating conditions................... 30
Airbag precautions for your child .........32
Correct driving posture .............................23
Curtain shield airbag operating condi-tions .................................................................. 30
Curtain shield airbag precautions ........32
Front passenger occupant classification system ............................................................. 36
General airbag precautions ....................32
Locations of airbags.................................... 28
Modification and disposal of airbags . 35
Side airbag operating conditions ......... 30
Side airbag precautions .............................32
Side and curtain shield airbags operating conditions...................................................... 30
Side and curtain shield airbags precau- tions ...................................................................32
SRS airbags ..................................................... 28
SRS warning light ...................................... 296
Alarm ....................................................................57 Warning buzzer ......................................... 295
Anchor brackets .......................................41, 49
Antennas (smart access system with push-button start)........................................ 95
Anti-lock Brake System (ABS)................201 Warning light ............................................... 297 Approach warning......................................... 181
ASC (Active Sound Control) ................... 141
Assist grips ..................................................... 230
Audio system-linked display .......................76
Automatic air conditioning system ........215
Automatic headlight leveling system ....143
Automatic High Beam ................................144
Automatic light control system................ 142
Automatic transmission ............................... 131
M mode ............................................................134
Paddle shift switches ....................... 133, 134
Snow mode.................................................... 133
Average fuel economy..................................73
Average vehicle speed .................................73
B
Back-up light Replacing light bulbs ................................282
Wattage ......................................................... 338
Battery Battery checking ........................................263
If the battery is discharged ..................... 319
Preparing and checking before winter......................................................................... 205
Warning light ...............................................296
Blind Spot Monitor (BSM).......................... 191
Boost gauge.......................................................74
Brake Brake hold ...................................................... 139
Fluid...................................................................334
Parking brake ................................................137
Warning light ...............................................295
Brake assist ......................................................201
Break-in tips...................................................... 119
Brightness control Instrument panel light control................... 71
BSM (Blind Spot Monitor).......................... 191
C
Card key ............................................................ 84

389Alphabetical Index
Gauges ............................................................... 66
Gear Position....................................................75
G-force................................................................74
Glove box ........................................................227
Glove box light ............................................. 228
H
Head restraints .............................................. 105
Headlight aim ................................................280
HeadlightsAutomatic High Beam system.............. 144
Light switch ..................................................... 142
Replacing light bulbs................................ 282
Wattage..........................................................338
Heated steering wheel .............................. 223
Heaters Automatic air conditioning system .....215
Heated steering wheel............................ 223
Outside rear view mirrors ...................... 219
Seat heaters .................................................. 223
High mounted stoplight Replacing light bulbs................................ 282
Hill-start assist control .................................201
Hood Open ............................................................... 255
Hooks Cargo hooks................................................ 229
Coat hooks ................................................... 230
Retaining hooks (floor mat)......................22
Horn ................................................................... 109
I
I/M test ............................................................ 252
Identification Engine ............................................................. 329
Vehicle ............................................................ 328
Ignition switch (engine switch)................. 127 Auto power off function .......................... 130
Changing the engine switch modes.. 129
If your vehicle has to be stopped in an
emergency ................................................286 Illuminated entry system ........................... 226
Indicators ........................................................... 64
Initialization
Items to initialize .......................................... 361
Maintenance.................................... 248, 260
Power windows ............................................. 112
Tire pressure warning system .............269
Inside rear view mirror ............................... 109
Instrument panel light co ntrol ..................... 71
Intercooler...................................................... 262
Intercooler coolant Capacity ......................................................... 332
Checking ...................................................... 260
Interior lights.................................................. 225 Front interior light ...................................... 225
Rear interior light........................................ 225
Intuitive parking assist Warning message ...................................... 187
J
JackPositioning a floor jack ............................255
Vehicle-equipped jack ...........................307
Jack handle .................................................... 307
Jam protection function Moon roof ........................................................ 115
Power windows ............................................. 112
K
Keyless entrySmart access system with push-button start ...................................................................95
Wireless remote control ...........................86
Keys Battery-saving function..............................96
Electronic key .................................................84
Engine switch ................................................. 127
If the electronic key does not operate properly .........................................................317
If you lose your keys .................................. 316
Key number plate .........................................84