cruise control LEXUS RC300 2020 User Guide

1754-5. Using the driving support systems
4
Driving
1Pulling the lever toward you can-
cels the speed control.
The speed control is also canceled when
the brake pedal is depressed.
2Pushing the lever up resumes the
cruise control and returns vehicle
speed to the set speed.
However, cruise control does not resume
when the vehicle speed is approximately
25 mph (40 km/h) or less.
When your vehicle is too close to a
vehicle ahead, and sufficient automatic
deceleration via the cruise control is
not possible, the display will flash and
the buzzer will sound to alert the driver.
An example of this would be if another
driver cuts in front of you while you are
following a vehicle. Depress the brake
pedal to ensure an appropriate vehi-
cle-to-vehicle distance.
■Warnings may not occur when
In the following instances, warnings
may not occur even when the vehi-
cle-to-vehicle distance is small.
 When the speed of the preceding
vehicle matches or exceeds your
vehicle speed
 When the preceding vehicle is trav-
eling at an extremely slow speed
 Immediately after the cruise control
speed was set
 When depressing the accelerator
pedal
When constant speed control mode is
selected, your vehicle will maintain a
set speed without controlling the vehi-
cle-to-vehicle distance. Select this
mode only when vehicle-to-vehicle dis-
tance control mode does not function
correctly due to a dirty radar sensor,
etc.
1 With the cruise control off, press
and hold the “ON/OFF” button for
1.5 seconds or more.
Immediately after the “ON/OFF” button is
pressed, the dynamic radar cruise control
Canceling and resuming the
speed control
Approach warning (vehi-
cle-to-vehicle distance control
mode)
Selecting constant speed con-
trol mode

1764-5. Using the driving support systems
indicator will come on. Afterwards, it
switches to the cruise control indicator.
Switching to constant speed control mode
is only possible when operating the lever
with the cruise control off.
2Accelerate or decelerate, with
accelerator pedal operation, to the
desired vehicle speed (at or above
approximately 25 mph [40 km/h])
and push the lever down to set the
speed.
Cruise control “SET” indicator will come
on.
The vehicle speed at the moment the lever
is released becomes the set speed.
Adjusting the sp eed setting: P.173
Canceling and resuming the speed setting:
 P.175
■Dynamic radar cruise control can be set
when
●The shift lever is in D.
●Range 4 or higher of D has been selected
by using the paddle shift switch.
●Vehicle speed is at or above approxi- mately 30 mph (50 km/h).
■Accelerating after setting the vehicle
speed
The vehicle can accelerate by operating the
accelerator pedal. After accelerating, the
set speed resumes. Ho wever, during vehi-
cle-to-vehicle distance control mode, the
vehicle speed may decrease below the set
speed in order to main tain the distance to
the preceding vehicle.
■Automatic cancelation of vehi-
cle-to-vehicle dist ance control mode
Vehicle-to-vehicle distance control mode is
automatically canceled in the following situ-
ations:
●Actual vehicle speed falls at or below
approximately 25 mph (40 km/h).
●VSC is activated.
●TRAC is activated for a period of time.
●When the VSC or TRAC system is
turned off.
●When snow mode is set.
●The sensor cannot detect correctly
because it is covered in some way.
●Pre-collision braking is activated.
If vehicle-to-vehicle distance control mode
is automatically canceled for any other
reason, there may be a malfunction in the
system. Contact your Lexus dealer.
■Automatic cancelation of constant
speed control mode
Constant speed control mode is automati-
cally canceled in the following situations:
●Actual vehicle speed is more than
approximately 10 mph (16 km/h) below
the set vehicle speed.
●Actual vehicle speed falls below approxi-
mately 25 mph (40 km/h).
●VSC is activated.
●TRAC is activated for a period of time.
●When the VSC or TRAC system is
turned off.
●Pre-collision braking is activated.
If constant speed control mode is automati-
cally canceled for any other reason, there

1774-5. Using the driving support systems
4
Driving
may be a malfunction in the system. Con-
tact your Lexus dealer.
■Brake system operation sound
If the brakes are applied automatically while
the vehicle is in vehicle-to-vehicle distance
control mode, a brake system operation
sound may be heard. This does not indicate
a malfunction.
■Warning messages and buzzers for
dynamic radar cruise control
Warning messages and buzzers are used to
indicate a system malfunction or to inform
the driver of the need for caution while driv-
ing. If a warning message is shown on the
multi-information display, read the message
and follow the instructions.
■When the sensor may not be correctly
detecting the vehicle ahead
In the case of the following and depending
on the conditions, operate the brake pedal
when deceleration of the system is insuffi-
cient or operate the accelerator pedal
when acceleration is required.
As the sensor may not be able to correctly
detect these types of vehicles, the approach
warning ( P.175) may not be activated.
●Vehicles that cut in suddenly
●Vehicles traveling at low speeds
●Vehicles that are not moving in the same
lane
●Vehicles with small rear ends (trailers
with no load on board, etc.)
●Motorcycles travelin g in the same lane
●When water or snow thrown up by the
surrounding vehicles hinders the detect-
ing of the sensor
●When your vehicle is pointing upwards
(caused by a heavy load in the luggage
compartment, etc.)
■Conditions under which the vehi-
cle-to-vehicle distance control mode
may not function correctly
In the case of the following conditions,
operate the brake pedal (or accelerator
pedal, depending on the situation) as nec-
essary.
As the sensor may not be able to correctly
detect vehicles ahead, the system may not
operate properly.
●When the road curves or when the lanes
are narrow
●When the vehicle ahead of you deceler-
ates suddenly
●When driving on a road surrounded by a
structure, such as in a tunnel or on a
bridge
●When the vehicle speed is decreasing to
the set speed after the vehicle acceler-
ates by depressing the accelerator pedal

2947-2. Steps to take in an emergency
In some situations, the master warning light and warning buzzer may not oper-
ate as specified. In this case, follow the instructions displayed in the warning
message.
 If a warning light comes on or flashes at the same time that a warning message is
displayed, take corrective actio n according to the warning light. ( P.284)
*: A buzzer sounds the first time a message is shown on the multi-information display.
■Warning messages
The warning messages explained below
may differ from the actual messages
according to operation conditions and vehi-
cle specifications.
■Warning buzzer
In some cases, the bu zzer may not be heard
due to being in a noisy location or audio
sound.
■If “Engine Oil Level Low Add or
Replace” is displayed
The engine oil level is low. Check the level
of the engine oil, and add if necessary.
This message may appear if the vehicle is
stopped on a slope. Move the vehicle to a
level surface and check to see if the mes-
sage disappears.
■If “Front Camera Unavailable” or “Front
Camera Unavailable Remove Debris
On Windshield” is displayed
The following systems may be suspended
until the problem shown in the message is
resolved. ( P.154, 287)
●PCS (Pre-Collision System)
●LDA (Lane Departure Alert with steering
control)
●Automatic High Beam
●Dynamic radar cruise control
■If “Maintenance Required Soon” is dis-
played
Indicates that all maintenance according to
the driven distance on the maintenance
schedule
* should be performed soon.
Comes on approximately 4500 miles
(7200 km) after the message has been
reset. If necessary, perform maintenance.
Please reset the message after the mainte-
nance is performed. ( P.240)
*: Refer to the separate “Scheduled Main-
tenance” or “Owner’s Manual Supple-
ment” for the main tenance interval
applicable to your vehicle.
■If “Maintenance Required Visit Your
Dealer” is displayed
Indicates that all mainte nance is required to
correspond to the driven distance on the
maintenance schedule
*.
Comes on approximately 5000 miles
(8000 km) after the message has been
reset. (The indicator will not work properly
unless the message ha s been reset.) Per-
form the necessary maintenance. Please
reset the message after the maintenance is
performed. ( P.240)
*: Refer to the separate “Scheduled Main-
Comes onDoes not sound
Indicates a condition, such as malfunction of electri-
cal components, their cond ition, or indicates the
need for maintenance
FlashesDoes not sound
Indicates a situation, such as when an operation has
been performed incorrectly, or indicates how to
perform an operation correctly
Warning buzzer*Warning

3027-2. Steps to take in an emergency
■When the spare tire is equipped
The vehicle becomes lower when driving
with the spare tire compared to when driv-
ing with standard tires.
■If you have a flat rear tire on a road cov-
ered with snow or ice (vehicles with
front and rear tires of the same size
except for vehicles with LDH and
19-inch tires)
Install the spare tire on one of the front
wheels of the vehicle. Perform the following
steps and fit tire chains to the rear tires:
1
Replace a front tire with the spare tire.
2
Replace the flat rear tire with the tire
removed from the front of the vehicle.
3
Fit tire chains to the rear tires.
WARNING
■When using the spare tire
●Remember that the spare tire provided
is specifically desi gned for use with
your vehicle. Do not use your spare
tire on another vehicle.
●Do not use more than one spare tire
simultaneously.
●Replace the spare tire with a standard
tire as soon as possible.
●Avoid sudden acceleration, abrupt
steering, sudden braking and shifting
operations that cause sudden engine
braking.
■When the spare tire is attached
The vehicle speed may not be correctly
detected, and the following systems may
not operate correctly:
• ABS & Brake assist
• VSC
• TRAC
• Dynamic radar cruise control
• PCS
• EPS
• Adaptive Variable Suspension System (if equipped)
• LDA (Lane Departure Alert with steering control)
• VGRS (if equipped)
• LDH (Lexus Dynamic Handling sys- tem) (if equipped)
• DRS (Dynamic Rear Steering) (if equipped)
• VDIM (Vehicle Dynamics Integrated Management)
• Tire pressure warning system
• Lexus parking assist monitor
• Intuitive parking assist (if equipped)
• Navigation system (if equipped)
Also, not only can the following system
not be utilized fully, bu t it may even nega-
tively affect the drive-train components:
• AWD system (if equipped)
■Speed limit when using the spare tire
Do not drive at speeds in excess of 50
mph (80 km/h) when a spare tire is
installed on the vehicle.
The spare tire is not designed for driving
at high speeds. Failure to observe this
precaution may lead to an accident caus-
ing death or serious injury.
■After using the tools and jack
Before driving, make sure all the tools
and jack are securely in place in their
storage location to reduce the possibility
of personal injury during a collision or
sudden braking.

376Alphabetical Index
Exterior ........................................................... 234
Interior ............................................................. 237
Seat belts........................................................ 237
Cargo capacity...............................................123
Cargo hooks ................................................... 221
Center Display ............................................. 204
Chains ................................................................199
Child restraint system Child seats definition................................... 40
Child seats installation........................ 44, 47
Front passenger occupant classification system ............................................................. 36
Installing a CRS to the front passenger seat ....................................................................42
Installing CRS with LATCH anchors . 48
Installing CRS with top tether strap.....50
Riding with children ..................................... 40
Types of child restraint system installation method ............................................................. 41
Using an anchor bracket .......................... 49
Child safety Airbag precautions.......................................32
Battery precautions ....................... 256, 310
Child restraint system.......................... 40, 41
Heated steering wheel or seat heater precautions.................................................. 214
How your child should wear the seat belt ............................................................................ 25
Installing child restraints ............................ 40
Moon roof precautions ..............................114
Power window lock switch........................ 111
Removed electronic key battery precau- tions ...............................................................268
Seat belt extender precautions ............. 25
Seat belt precautions .................................. 40
Trunk precautions ........................................ 89
Cleaning Aluminum wheels ...................................... 234
Exterior ........................................................... 234
Interior ............................................................. 237
Radar sensor..................................................152
Seat belts........................................................ 237 Clock ........................................................ 64, 222
Clock settings ............................................... 222
Coat hooks..................................................... 222
Compass ......................................................... 229
Condenser ..................................................... 254
Console box .................................................. 220
Consumption screen ..................................... 77
Cooling system............................................. 252
Engine overheating...................................... 311
Cornering lights ............................................ 138 Replacing light bulbs ................................ 272
Cruise control Dynamic radar cruise control............... 170
Cup holders ................................................... 220
Current fuel consumption ............................ 71
Curtain shield airbags .................................. 28
Customizable features ................................341
D
Daytime running light system ................... 137
Daytime running lights Replacing light bulbs ................................ 272
Defogger Outside rear view mirrors........................ 211
Rear window ................................................... 211
Windshield ....................................................... 211
Differential Front differential oil............. ....................... 323
Rear differential oil......... ..................... ....... 323
Dimension ....................................................... 318
Dinghy towing................................................. 124
Display Center Display ............................................204
Drive information ............................................ 71
LDA (Lane Departure Alert with steering control) ......................................................... 165
Multi-information display .......................... 69
Warning messages...................................293
Distance until next engine oil change .... 68
Do-it-yourself maintenance ......................241
Door courtesy lights ..................................... 217

377Alphabetical Index
Door lockDoors.................................................................. 86
Smart access system with push-button start ................................................................... 93
Wireless remote control........................... 84
Doors Automatic door lock ing and unlocking
system .............................................................88
Door glasses ................................................... 110
Door lock.......................................................... 86
Open door warning buzzer .........87, 88, 288
Open door warning light ......................288
Outside rear view mirrors ..................... 108
Drive distance .................................................... 71
Drive info 1/Drive info 2/Drive info 3...... 71
Drive information ............................................. 71
Driver’s seat position memory Driving position memory........................ 100
Memory recall function ............................102
Power easy access system .................... 100
Drive-start control ......................................... 117
Driving Break-in tips .....................................................117
Correct driving posture .............................23
Driving mode select switch .................... 192
Procedures ...................................................... 116
Winter drive tips.......................................... 198
Driving assist system information display ..............................................................................74
Driving information display .......................... 71
Driving position memory........................... 100 Memory recall function ............................102
Power easy access system .................... 100
Driving range ..................................................... 71
DRS (Dynamic Rear Steering) ................194
Dynamic radar cruise control ..................170 Warning message............ ............... 177, 292
Dynamic Rear Steering (DRS) ................194
E
Eco Driving Indicator.....................................72 Eco Driving Indicator Light .........................72
EDR (Event data recorder) ............................6
Elapsed time ....................................................... 71
Electric Power Steering (EPS) ................194
Warning light .............................................. 286
Electronic key .................................................. 82 Battery-saving function.............................. 94
If the electronic key does not operate properly ...................................................... 306
Replacing the battery ............................... 267
Emergency flashers .....................................276
Emergency, in case of If a warning buzzer sounds...................284
If a warning light turns on.......................284
If a warning message is displayed ..... 292
If the battery is discharged ................... 308
If the electronic key does not operate properly ...................................................... 306
If the engine will not start....................... 303
If the fuel filler do or cannot be opened
......................................................................... 305
If the vehicle is trapped in rising water .......................................................................... 277
If you have a flat tire ..................................296
If you lose your keys ................................ 305
If you think something is wrong..........282
If your vehicle becomes stuck .............. 315
If your vehicle has to be stopped in an emergency ................................................. 276
If your vehicle needs to be towed ..... 279
If your vehicle overheats ........................... 311
Engine ACCESSORY mode................................ 127
Compartment.............................................. 249
Engine switch ................................................ 125
Fuel pump shut off system.....................283
Hood ................................................................ 247
How to start the engine ........................... 125
Identification number ................................ 319
If the engine will not start....................... 303
If your vehicle has to be stopped in an emergency ................................................. 276

380Alphabetical Index
Replacing the battery............................... 267
Warning buzzer ............................................ 93
Wireless remote control........................... 84
Knee airbags .................................................... 28
L
Lane Departure Alert wi th steering control
(LDA) Operation........................................................163
Warning messages ................................... 168
Language (multi-information display) ....74
LDA (Lane Departure Alert with steering control)Operation........................................................163
Warning messages ................................... 168
LDA (Lane Departure Alert with steering control) switch .............................................165
LDH (Lexus Dynamic Handling system) ............................................................................195
Lever Auxiliary catch lever ................................. 247
Hood lock release lever......................... 247
Shift lever.......................................................... 129
Turn signal lever ...........................................134
Wiper lever..................................................... 142
Lexus Dynamic Handling system (LDH) ............................................................................195
Lexus Enform Safety Connect.................. 52
Lexus Safety System + Automatic High Beam ..............................139
Dynamic radar cruise control ...............170
LDA (Lane Departure Alert with steering control) ..........................................................163
PCS (Pre-Collision System)................. 156
License plate lights Light switch ..................................................... 137
Replacing light bulbs.................................272
Light Wattage.......................................................... 328
Light bulbs Replacing ........................................................272 Lights
Automatic High Beam system ............. 139
Front interior lights ...................................... 217
Headlight switch...........................................137
Interior lights ................................................... 217
Interior lights list ............................................ 217
Personal lights .............................................. 218
Rear interior lights ....................................... 217
Replacing light bulbs ................................ 272
Trunk light ...........................................................91
Turn signal lever ...........................................134
Vanity lights .................................................. 223
Wattage ..........................................................328
Lock steering column ..................................125
M
Maintenance Do-it-yourself maintenance .................245
General maintenance ...............................241
Maintenance date ....................................... 318
Maintenance requirements ..................240
Malfunction indicator la mp ..................... 285
Master warning light .................................. 289
Menu icons........................................................ 70
Meter Changing the main meter location...... 67
Clock................................................................... 64
Indicators........................................................... 62
Instrument panel light control................. 69
Meters................................................................. 64
Multi-information display .......................... 69
Settings............................................................... 74
Units..................................................................... 73
Warning lights .............................................284
Warning messages................................... 292
Micro dust and pollen filter ........................ 211
Mirrors Inside rear view mirror ............................. 107
Outside rear view mirror defoggers .. 211
Outside rear view mirrors...................... 108
Vanity mirrors .............................................. 223

381Alphabetical Index
Moon roofDoor lock linked moon roof operation............................................................................ 113
Jam protection function............................. 113
Operation..........................................................112
Multi-information display ............................ 69 Audio system-linked display....................74
Boost gauge.....................................................72
Drive information ............................................ 71
Drive information 1/Drive information 2/Drive information 3............................... 71
Driving assist system information display .............................................................................74
Dynamic radar cruise control ...............170
Eco Driving Indicator ..................................72
Engine oil pressure gauge ........................72
Engine oil temperature gauge ................72
Gear Position ..................................................73
G-force...............................................................72
LDA (Lane Departure Alert with steering control) ......................................................... 165
Menu icons ...................................................... 70
Meter control switches .............................. 70
Navigation system-linked display .........74
Settings ...............................................................74
Tire pressure ....................................... 73, 260
Units .....................................................................73
Vehicle sway warning .................................73
Warning message display ........................74
Warning messages .................................. 292
N
Navigation system-linked display.............74
Noise from under vehicle .............................. 5
O
“ODO TRIP” switch ...................................... 68
Odometer ......................................................... 68
Odometer and trip meter display “ODO TRIP” switch .................................... 68 Oil
Engine oil........................................................320
Front differential oil............. ....................... 323
Rear differential oil......... ..................... ....... 323
Opener Fuel filler door ............................................... 149
Hood ................................................................ 247
Trunk ...................................................................90
Outer foot lights Location ............................................................ 217
Outside rear view mirrors Adjustment ..................................................... 108
BSM (Blind Spot Monitor)..................... 184
Folding.............................................................. 109
Linked mirror functi on when reversing
........................................................................... 109
Mirror position memory ..........................100
Outside rear view mirror defoggers .. 211
RCTA function ............................................. 184
Outside temperature.................................... 64
Overheating ..................................................... 311
P
Paddle shift switches ........................... 131, 132
Panic mode ....................................................... 84
Parking brake Operation ....................................................... 135
Parking brake engaged warning buzzer........................................................................... 135
Warning light .............................................. 286
Warning message ...................................... 135
Parking lights Light switch .....................................................137
Replacing light bulbs ................................ 272
PCS (Pre-Collision System) Function ........................................................... 156
PCS OFF switch ......................................... 158
Warning light ...............................................287
Warning message ..................................... 292
Personal lights................................................. 217

382Alphabetical Index
Power control unit coolantPreparing and checking before winter.......................................................................... 198
Power easy access system ....................... 100
Power outlet .................................................. 222
Power steering (Elect ric power steering
system)............................................................194 Warning light ...............................................286
Power windows Door lock linked window operation..... 111
Jam protection function............................. 110
Operation......................................................... 110
Window lock switch ..................................... 111
Pre-Collision System (PCS) Function ........................................................... 156
PCS OFF switch ......................................... 158
Warning light ............................................... 287
Warning message..................................... 292
R
Radar cruise control (dynamic radar cruise control) ...........................................................170
Radiator ........................................................... 254
RCTA Function ........................................................... 184
Rear Cross Traffic Alert (RCTA) .......... 184
Rear seats .......................................................... 99 Head restraints ............................................ 103
Seat heaters .................................................... 214
Seat ventilators.............................................. 214
Rear side marker lights Light switch ..................................................... 137
Rear turn signal lights Turn signal lever ...........................................134
Wattage.......................................................... 328
Rear view mirror Inside rear view mirror..............................107
Outside rear view mirrors ..................... 108
Rear window defogger ................................ 211
Refueling Capacity ......................................................... 320
Fuel types....................................................... 320 If the fuel filler do
or cannot be opened
......................................................................... 305
Opening the fuel tank cap ..................... 149
Remote Touch .............................................. 202
Replacing Electronic key battery .............................. 267
Fuses.................................................................269
Light bulbs ..................................................... 272
Tires ..................................................................296
Resetting the message indicating mainte- nance is required ...................................... 240
Rev indicator .....................................................67
Rev peak..............................................................67
S
Seat belt reminder light.............................288
Seat belts............................................................ 24 Automatic Locking Retractor................. 26
Child restraint system installation ..40, 41
Cleaning and maintaining the seat belt.......................................................................... 237
Emergency Locking Retractor .............. 26
How to wear your seat belt ..................... 25
How your child should wear the seat belt ............................................................................. 25
Pregnant women, proper seat belt use ............................................................................. 24
Reminder light and buzzer .................. 288
Seat belt extender......................................... 25
Seat belt pretensioners .............................. 27
SRS warning light...................................... 285
Seat heaters ..................................................... 214
Seat position memory................................. 100
Seat ventilators ............................................... 214
Seating capacity.............................................123
Seats Adjustment ....................................................... 97
Cleaning ......................................................... 237
Driving position memory ........................ 100
Head restraints............................................. 103
Power easy access system .................... 100
Properly sitting in the seat ........................ 23