2019 LEXUS RC300 horn

1073-4. Adjusting the steering wheel and mirrors
RC350AWD_RC350_RC300AWD_RC30
0_OM_(U)_1810
3
Before driving
To sound the horn, press on or close to
the mark. The height of the rear view mirror can
be adjusted to suit your driving pos-
ture.
Adjust the height of the rear view mir-
ror by moving it up and down.
Responding to the level of brightness
of the headlights of vehicles behind, the
reflected light is automatically
reduced.
Turn the automatic anti-glare function
mode on/off
WARNING
■After adjusting the steering wheel
(manual type)
Make sure that the steering wheel is
securely locked.
Otherwise, the steering wheel may move
suddenly, possibly causing an accident,
and resulting in death or serious injury.
Also, the horn may not sound if the steer-
ing wheel is not securely locked.
Horn
Inside rear view mirror
The rear view mirror’s position can
be adjusted to enable sufficient
confirmation of the rear view.
Adjusting the heig ht of rear view
mirror
WARNING
■Caution while driving
Do not adjust the position of the mirror
while driving.
Doing so may lead to mishandling of the
vehicle and cause an accident, resulting
in death or serious injury.
Anti-glare function

1794-5. Using the driving support systems
RC350AWD_RC350_RC300AWD_RC30
0_OM_(U)_1810
4
Driving
●A sensor is covered in any way.
●When a sensor or the area around a sen-
sor is extremely hot or cold.
●On an extremely bumpy road, on an
incline, on gravel, or on grass.
●The vicinity of the vehicle is noisy due to
vehicle horns, motorcycle engines, air
brakes of large vehicles, or other loud
noises producing ultrasonic waves.
●There is another vehicle equipped with
parking assist sensors in the vicinity.
●A sensor is coated with a sheet of spray
or heavy rain.
●If a sensor is hit by a large amount of
water, such as when driving on a flooded
road.
●If the vehicle is significantly tilted.
●The vehicle is approaching a tall or
curved curb.
●If objects draw too close to the sensor.
■Objects which may not be properly
detected
The shape of the object may prevent the
sensor from detectin g it. Pay particular
attention to the following objects:
●Wires, fences, ropes, etc.
●Cotton, snow and other materials that
absorb sound waves
●Sharply-angled objects
●Low objects
●Tall objects with upper sections project-
ing outwards in the direction of your vehi-
cle
People may not be de tected if they are
wearing certain types of clothing.
■Customization
Settings can be changed. ( P.346)
■Multi-information display and Center Display
Sensors that detect an obstacle will illuminate continuously or blink.
 Approximate distance to object: 3.3 ft. (1 00 cm) to 1.6 ft. (50 cm) (Front center
sensor)
Approximate distance to object: 4.9 ft. (1 50 cm) to 2.0 ft. (60 cm) (Rear center
sensor)
 Approximate distance to object: 1.6 ft. (5 0 cm) to 1.3 ft. (40 cm) (Front corner
sensor/front center sensor)
Approximate distance to object: 2.0 ft. (60 cm) to 1.5 ft. (4 5 cm) (Rear corner
sensor/rear center sensor)
Sensor detection display, obstacle distance
Multi-information displayInsert display (Center Display)
(continuous)(blinking slowly)

3017-2. Steps to take in an emergency
RC350AWD_RC350_RC300AWD_RC30
0_OM_(U)_1810
7
When trouble arises
One of the following may be the cause
of the problem:
 There may not be sufficient fuel in
the vehicle’s tank.
Refuel the vehicle.
 The engine may be flooded.
Try to restart the engine again fol-
lowing correct starting procedures.
( P.125)
 There may be a malfunction in the
engine immobilizer system.
( P.57)
One of the following may be the cause
of the problem:
 The battery may be discharged.
( P.306)
 The battery terminal connections
may be loose or corroded.
( P.253)
NOTICE
■Driving with tire chains and the spare
tire
Do not fit tire chains to the spare tire.
Tire chains may damage the vehicle body
and adversely affect driving perfor-
mance.
■When replacing the tires
When removing or fitting the wheels,
tires or the tire pressure warning valve
and transmitter, contact your Lexus
dealer as the tire pr essure warning valve
and transmitter may be damaged if not
handled correctly.
If the engine will not start
If the engine will not start even
though correct starting procedures
are being followed ( P.125), con-
sider each of the following points:
The engine will not start even
though the starter motor oper-
ates normally.
The starter motor turns over
slowly, the interior lights and
headlights are dim, or the horn
does not sound or sounds at a low
volume.

3027-2. Steps to take in an emergency
RC350AWD_RC350_RC300AWD_RC30
0_OM_(U)_1810
The engine starting system may be
malfunctioning due to an electrical
problem such as electronic key battery
depletion or a blown fuse. However, an
interim measure is available to start the
engine. (P.302)
One of the following may be the cause
of the problem:
 One or both of the battery terminals
may be disconnected. ( P.253)
 The battery may be discharged.
( P.306)
 There may be a malfunction in the
steering lock system.
Contact your Lexus dealer if the problem
cannot be repaired, or if repair procedures
are unknown.
When the engine does not start, the
following steps can be used as an
interim measure to start the engine if
the engine switch is functioning nor-
mally:
1 Set the parking brake.
2 Shift the shift lever to P.
3 Turn the engine switch to ACCES-
SORY mode. 4
Press and hold the engine switch
for about 15 seconds while
depressing the brake pedal firmly.
Even if the engine can be started using
the above steps, the system may be
malfunctioning. Have the vehicle
inspected by your Lexus dealer.
The starter motor does not turn
over
The starter motor does not turn
over, the interior lights and head-
lights do not turn on, or the horn
does not sound.
Emergency start function

3711-1. What to do if... (Troubleshooting)
RC350AWD_RC350_RC300AWD_RC30
0_OM_(U)_1810371What to do if... (Troubleshooting)
 Is the engine switch in IGNITION
ON mode?
If you cannot release the shift lever by
depressing the brake pedal with the engine
switch in IGNITION ON mode. ( 
P.129)
It is locked automatically to prevent
theft of the vehicle. ( P.125)
 Is the window lock switch pressed?
The power window except for the one at
the driver’s seat cannot be operated if the
window lock switch is pressed. ( 
P.111)
The auto power off function will be
operated if the vehicle is left in
ACCESSORY or IGNITION ON
mode (the engine is not running) for
a period of time. ( P.127)
 The seat belt reminder light is flash-
ing
Are the driver and the front passenger
wearing the seat belts? ( 
P.286)
The parking brake indicator is on
Is the parking brake released? ( P.134)
Depending on the situation, other
types of warning buzzer may also
sound. (P.282, 290)
 Did anyone inside the vehicle open
a door during setting the alarm?
The sensor detects it and the alarm sounds.
(
P.58)
Do one of the following to deactivate
or stop the alarm:
 Unlock the doors.
 Open the trunk using the entry
function or wireless remote control.
 Turn the engine switch to ACCES-
SORY or IGNITION ON mode, or
start the engine.
 Is the message displayed on the
multi-information display?
Check the message on the multi-informa-
tion display. ( 
P.290)
When a warning light turns on or a
warning message is displayed, refer
to P.282, 290.
The steering wheel cannot be
turned after the engine is
stopped
The windows do not open or
close by operating the power
window switches
The engine switch is turned off
automatically
A warning buzzer sounds during
driving
An alarm is activated and the
horn sounds
A warning buzzer sounds when
leaving the vehicle
A warning light turns on or a
warning message is displayed

3771-1. What to do if... (Troubleshooting)
RC350AWD_RC350_RC300AWD_RC30
0_OM_(U)_1810377Alphabetical Index
H
Head restraints .............................................. 103
Headlight aim ................................................ 269
Headlights Automatic High Beam system............. 138
Light switch .....................................................136
Replacing light bulbs................................ 270
Wattage.......................................................... 326
Heated steering wheel ................................ 212
Heaters Automatic air conditioning system ...205
Heated steering wheel.............................. 212
Outside rear view mirrors ....................209
Seat heaters .................................................... 212
High mounted stoplight Replacing light bulbs................................ 270
Hill-start assist control .................................192
Hood Open ............................................................... 245
Hooks Cargo hooks.................................................. 219
Coat hooks ................................................... 220
Retaining hooks (floor mat)......................22
Horn ....................................................................107
I
I/M test ............................................................ 242
Identification Engine ............................................................... 317
Vehicle ..............................................................316
Ignition switch (engine switch).................125 Auto power off function ........................... 127
Changing the engine switch modes.. 126
If your vehicle has to be stopped in an
emergency ................................................ 274
Illuminated entry system ............................. 216
Indicators ........................................................... 64
Initialization Items to initialize ......................................... 349
Maintenance ................................... 238, 250
Power windows............................................. 110 Tire pressure warning system ............ 260
Inside rear view mirror ................................107
Instrument panel light co ntrol ..................... 71
Intercooler...................................................... 252
Intercooler coolant Capacity .......................................................... 319
Checking ...................................................... 250
Interior lights....................................................215 Front interior light ....................................... 215
Rear interior light......................................... 215
Intuitive parking assist Warning message ...................................... 178
J
JackPositioning a floor jack ............................245
Vehicle-equipped jack ........................... 294
Jack handle .................................................... 294
Jam protection function Moon roof ........................................................ 113
Power windows ............................................. 110
K
Keyless entrySmart access system with push-button start ................................................................... 93
Wireless remote control ...........................84
Keys Battery-saving function.............................. 94
Electronic key ................................................. 82
Engine switch ................................................ 125
If the electronic key does not operate properly ...................................................... 304
If you lose your keys ................................ 303
Key number plate ......................................... 82
Keyless entry ..........................................86, 93
Mechanical key .............................................. 82
Replacing the battery ...............................265
Warning buzzer ............................................ 93
Wireless remote control ...........................84
Knee airbags .................................................... 28