2021 LEXUS RCF air conditioning

3387-2. Steps to take in an emergency
radiator core (radiator) for any
leaks.
Cooling fans
Radiator
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
4The coolant level is satisfactory if it
is between the full (“FULL”) and low
(“LOW”) lines on the reservoir.
Reservoir cap
“FULL”
“LOW”
5 Add coolant if necessary.
Water can be used in an emergency if coolant is unavailable.
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.
A
B
A
B
C
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.

3558-1. Specifications
8
Vehicle specifications
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
Maximum loaded vehicle weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight
150 lb. (68 kg) times the number of occupants
specified in the second column of Table 1
* that fol-
lows
Occupant distributionDistribution of occupants in a vehicle as specified in
the third column of Table 1
* below
Production options weight
The combined weight of installed regular produc-
tion options weighing over 5 lb. (2.3 kg) in excess of
the standard items which they replace, not previ-
ously considered in curb weight or accessory
weight, including heavy duty brakes, ride levelers,
roof rack, heavy duty battery, and special trim
RimA metal support for a tire or a tire and tube assem-
bly upon which the tire beads are seated
Rim diameter (Wheel diameter)Nominal diameter of the bead seat
Rim size designationRim diameter and width
Rim type designationThe industry manufacturer’s designation for a rim
by style or code
Rim widthNominal distance between rim flanges
Vehicle capacity weight (Total load
capacity)The rated cargo and luggage load plus 150 lb. (68
kg) times the vehicle’s designated seating capacity
Vehicle maximum load on the tire
The load on an individual ti re that is determined by
distributing to each axle its share of the maximum
loaded vehicle weight, and dividing by two
Tire related termMeaning

3678-2. Customization
8
Vehicle specifications
■Driving mode select switch (P.192)
■Active rear wing* ( P.195)
*:If equipped
■Automatic air conditioning system ( P.213)
■Seat heaters* ( P.221)
*:If equipped
■Illumination ( P.223)
FunctionDefault settingCustomized setting
Powertrain control in custom
modeNormalPowerO——Eco
Chassis control in custom
modeNormalSportO——
Air conditioning operation in
custom modeNormalEcoO——
ABC
FunctionDefault settingCustomized setting
Operation of the active rear
wingOffOn—OO
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
FunctionDefault settingCustomized setting
Time elapsed before the inte-
rior lights turn off15 seconds
Off
O—O7.5 seconds
30 seconds
Operation after the engine
switch is turned offOnOff——O
ABC

393Alphabetical Index
Alphabetical Index
A
A/CAir conditioning filter ............................... 282
Automatic air conditioning system ..... 213
Micro dust and pollen filter..................... 217
ABS (Anti-lock Brake System)................199 ABS warning light .....................................303
Active rear wing.............................................195
Adaptive Variable Suspension System200
Air conditioning filter ................................. 282
Air conditioning system Air conditioning filter ............................... 282
Automatic air conditioning system ..... 213
Micro dust and pollen filter..................... 217
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 ......................................303
Alarm ................................................................... 58 Warning buzzer ......................................... 302
Anchor brackets ...................................... 43, 51
Antennas (smart access system with push-button start)........................................ 98
Anti-lock Brake System (ABS)................199 ABS warning light .....................................303 Approach warning........................................ 176
Armrest............................................................ 228
Assist grips ..................................................... 229
Audio system-linked display ........................81
Automatic air conditioning system ........213
Automatic headlight leveling system ....139
Automatic headlight leveling system warning light............................................. 306
Automatic High Beam ............................... 140
Automatic light control system............... 138
Automatic transmission ..............................132 M mode ........................................................... 135
Paddle shift switches ....................... 134, 135
Average fuel economy................................. 75
Average vehicle speed ................................ 75
B
Back-up light Replacing light bulbs ............................... 289
Battery Battery checking .......................................... 271
Charging system warning light...........302
If the battery is discharged ....................334
Preparing and checking before winter..........................................................................204
Blind Spot Monitor (BSM)......................... 179
Brake Brake system warning light ..................302
Fluid...................................................................346
Parking brake ................................................137
Brake assist ......................................................199
Break-in tips...................................................... 119
Brightness control Instrument panel light control................. 73
BSM (Blind Spot Monitor)......................... 179
C
Card key ............................................................ 88
Care Exterior................................... 240, 248, 252
Interior .............................................................245

397Alphabetical Index
Heated steering wheel ................................ 221
HeatersAutomatic air conditioning system ..... 213
Heated steering wheel.............................. 221
Outside rear view mirrors ...................... 217
Rear window .................................................. 217
Seat heaters .................................................... 221
High mounted stoplight Replacing light bulbs................................289
Hill-start assist control ...............................200
Hood Open ............................................................... 264
Hooks Cargo hooks.................................................227
Coat hooks ................................................... 229
Retaining hooks (floor mat)......................22
Horn ................................................................... 109
I
I/M test .............................................................. 261
Identification Engine ............................................................. 343
Vehicle ............................................................ 342
Ignition switch (engine switch).................128 Auto power off function ............................ 131
Changing the engine switch modes. 130
If your vehicle has to be stopped in an
emergency ................................................ 294
Illuminated entry system ........................... 224
Indicators ........................................................... 63
Initialization Items to initialize .........................................369
Maintenance ................................................ 257
Power windows..............................................112
Tire pressure warning system ..............277
Inside rear view mirror ............................... 109
Instrument panel light control ....................73
Interior lights.................................................. 223 Front interior light ...................................... 223
Rear interior light ....................................... 223
Intuitive parking assist Function ............................................................187 Warning message ...................................... 189
J
Jack
Positioning a floor jack ............................265
Vehicle-equipped jack ................ 314, 320
Jack handle .......................................... 314, 320
Jam protection function Moon roof ........................................................ 115
Power windows ............................................. 112
K
Keyless entrySmart access system with push-button start ...................................................................98
Wireless remote control ...........................90
Keys Battery-saving function..............................99
Electronic key ................................................ 88
Engine switch ................................................ 128
If the electronic key does not operate properly ....................................................... 332
If you lose your keys .................................. 331
Key number plate ........................................ 88
Keyless entry ..........................................92, 98
Mechanical key ............................................. 88
Replacing the battery ...............................283
Warning buzzer ............................................ 99
Wireless remote control ...........................90
Knee airbags .................................................... 28
L
Lane Departure Alert LDA indicator ............................................. 305
Lane Departure Alert with steering control (LDA)Operation ....................................................... 164
Warning message ...................................... 169
Language (multi-information display) .....81
LATCH anchors ............................................. 49