air conditioning LEXUS RCF 2018 Owner's Guide

4256-3. Do-it-yourself maintenance
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) 6
Maintenance and care Turn the engine switch off.
Open the glove box. Lift up the side
with the stay, disconnect the stay
tabs and remove the partition by
pulling horizontally.
Press the tabs and remove the filter
cover.
Press the tabs and remove the filter
case.Air conditioning filter The air conditioning filter must be ch anged regularly to maintain air condi-
tioning efficiency.
Removal method 1
2
3
4

426 6-3. Do-it-yourself maintenance
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)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 sh ould be pointing up.■
Checking interval
Inspect and replace the air cond itioning filter according to the maintenance schedule. In
dusty areas or areas with heavy traffic fl ow, early replacement may be required. (For
scheduled maintenance informat ion, please refer to the “Owner’s Manual Supplement”
or “Scheduled Maintenance”.) ■
If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace if necessary. 5
NOTICE ■
When using the air conditioning system
Make sure that a filter is always installed.
Using the air conditioning system without a filter may cause damage to the system.

4817-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) 7
When trouble arises
* : Refer to the separate “Scheduled Mainte nance” or “Owner’s Manual Supplement”
for the maintenance interval applicable to your vehicle. Indicates that operation of large electricity consuming
systems such as the air conditioning system are sus-
pended
 Stop using unnecessary electric components to
reduce electricity consumpt ion. Wait a while until
the electric power supply is restored.
If this message is freque ntly displayed, have the
vehicle inspected at your Lexus dealer immediately.
Indicates that the PCS (Pre -Collision System) is tempo-
rarily unavailable
 When conditions improve, the system resumes
operation. If this message is displayed continuously,
have the vehicle inspected by your Lexus dealer.
Indicates that part of th e PCS (Pre-Collision System)
sensor is dirty, covered with ice, etc.
 Remove any dirt, ice, etc.Warning message Details/Actions(Flashes)

526 7-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)●
The engine coolant temperature gauge (  P. 91, 96) is in 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.
Stop the vehicle in a safe place and tu rn off the air conditioning system, and
then stop the engine.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.If your vehicle overheats The following may indicate that your vehicle is overheating.
Correction procedures 1
2

5297-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) 7
When trouble arises Add coolant if necessary. Water can be used in an emerge ncy 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 fan 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. 5 
Engine (RC350/RC300 AWD) 
Engine (RC300)
Engine (RC F) 
Intercooler (RC300)
6
7

5758-2. Customization
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) 8
Vehicle specifications ■
Intuitive parking assist
* (  P. 280)
* : If equipped ■
Driving mode select switch (  P. 301)
* : If equipped ■
Active rear wing
* (  P. 307)
* : RC F
■
Automatic air conditioning system (  P. 333)Function Default setting Customized setting
Detection distance of the front
center sensor
* Far Near O O
Detection distance of the rear
center sensor Far Near O O
Buzzer volume 2 1 to 3 O O 1 2
Function Default setting Customized setting
Powertrain control in custom
mode
* Normal Power
O —
Eco
Chassis control in custom
mode
* Normal Sport O —
Air conditioning operation in
custom mode
* Normal Eco O — 1 2
Function Default setting Customized setting
Operation of the active rear wing Off On — O 1 2
Function Default setting Customized setting
A/C auto switch operation On Off O O
Exhaust gas sensor sensitivity Standard -3 to 3 O O 1 2

616
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)Alphabetical index
Alphabetical index A/C ............................................................ 333
Air conditioning filter........................425
Automatic air conditioning
system ..................................................333
ABS (Anti-lock Brake System).........312
Warning light .......................................453
Active rear wing.................................... 307
Active Sound Control
(ASC).......................................... 223, 224
Adaptive Variable
Suspension System.............................313
Air conditioning filter .......................... 425
Air conditioning system ..................... 333
Air conditioning filter........................425
Automatic air conditioning
system ..................................................333 Airbags ........................................................ 40
Airbag operating conditions ...........47
Airbag precautions
for your child ........................................42
Correct driving posture .....................32
Curtain shield airbag
operating conditions ........................47
Curtain shield airbag
precautions .......................................... 44
Front passenger occupant
classification system........................... 51
General airbag precautions ............42
Locations of airbags............................ 40
Modification and disposal
of airbags............................................... 46
Side airbag operating
conditions ..............................................47
Side airbag precautions .....................42
Side and curtain shield airbags
operating conditions ........................47
Side and curtain shield
airbags precautions ..........................42
SRS airbags ............................................. 40
SRS warning light .............................. 453A

623Alphabetical index
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)Garage door opener .......................... 359
Gauges ................................................. 91, 96
Glove box ................................................. 351
Glove box light ....................................... 351
Head restraints ......................................... 171
Headlight cleaner................................. 233
Headlights ............................................... 225
Automatic High Beam
system ..................................................228
Light switch ........................................... 225
Replacing light bulbs ........................439
Heaters
Air conditioning system ..................333
Heated steering wheel ....................344
Outside rear view mirrors ............ 338
Seat heaters ..........................................345
Hill-start assist control ..........................312
Hood .......................................................... 393
Open ........................................................393
Hooks
Cargo hooks ....................................... 353
Coat hooks .......................................... 358
Retaining hooks (floor mat) .............30
Horn ............................................................. 175 I/M test ..................................................... 390
Identification
Engine .....................................................538
Vehicle .................................................... 537
Ignition switch (engine switch) ........207
Illuminated entry system ................... 348
Immobilizer system ................................. 79
Indicators .....................................................87
Initialization
Maintenance ........................... 385, 403
Meter .................................................. 111, 129
Moon roof ...............................................187
Multi-information display.......... 111, 129
Power windows................................... 183
Tire pressure
warning system ................................. 413
Initiators (tire pressure
warning system) .................................. 418
Inside rear view mirror......................... 176
Instrument panel light
control ............................................ 94, 100
Intercooler .............................................. 406
Intercooler coolant.............................. 404
Capacity................................................. 544
Checking ...............................................405
Preparing and checking
before winter ........................320, 320
Interior lights .......................................... 348
Intuitive parking assist ........................ 280G
H I