2018 LEXUS RC300 cruise control

278 4-5. Using the driving support systems
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)■
Automatic cancelation of co nstant speed control mode
Constant speed control mode is automatica lly canceled in the following situations:●
Actual vehicle speed is more than approxim ately 10 mph (16 km/h) below the set vehi-
cle speed. ●
Actual vehicle speed falls 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. ●
Pre-collision braking is activated.
If constant speed control mode is automati cally canceled for any other reason, there may
be a malfunction in the system . Contact your Lexus dealer.■
Warning messages and buzzers fo r dynamic radar cruise control
Warning messages and buzzers are used to indicate a system malfunction or to inform
the driver of the need for ca ution while driving. If a warn ing 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 insuff icient 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. 275) 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 (traile rs 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 detecting of
the sensor

468 7-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) Indicates a malfunction in the vehicle’s charging system.
 Immediately stop the vehicle in a safe place and
contact your Lexus dealer. Continuing to drive the
vehicle may be dangerous.
Indicates that the radar sensor is dirty or covered with
ice
A buzzer also sounds.
 Clean the sensor.
Indicates that the dynamic radar cruise control system
cannot be used temporarily due to bad weather
A buzzer also sounds.
 Use the dynamic radar cruise control system when
it becomes available again.Warning message Details/Actions(F SPORT
models)

4697-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) 7
When trouble arises Indicates a malfunction in the smart access system with
push-button start
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer. (If equipped)
Indicates that a Blind Spot Monitor sensor or the sur-
rounding area on the bumper is dirty or covered with ice
A buzzer also sounds.
 Clean off the dirt, snow, ice, etc. and drive the vehi-
cle with the operation conditions of the BSM func-
tion (  P. 295) satisfied for approximately 10
minutes. If the warning me ssage does not disappear,
the sensor may be misaligned. Have the vehicle
inspected by your Lexus dealer.
Indicates a malfunction in the dynamic radar cruise con-
trol system
Press the “ON/OFF” button once to deactivate the
system, and then press the button again to reactivate
the system.
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates a malfunction in the LDA (Lane Departure
Alert with steering control) system
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.Warning message Details/Actions

470 7-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) The operation conditions of the camera sensor are not
met.
The following systems may be suspended until the
problem shown in the message is resolved.
• PCS (Pre-Collision System)
• LDA (Lane Departure Alert with steering control)
• Dynamic radar cruise control
•Automatic High Beam
 P. 260
Indicates that the system is temporarily unavailable due
to a malfunction in a sensor other than the camera sen-
sor
A buzzer also sounds.
 Turn the LDA (Lane Departure Alert with steering
control) system off, wait for a little while, and then
turn the LDA (Lane Depart ure Alert with steering
control) system back on.Warning message Details/Actions

482 7-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)■
Warning messages
The warning message illustrations used are intended as examples, and may differ from
the image that is actually displaye d on the multi-information display.■
Warning message in radar cruise mode
In the following cases, the wa rning message may not be displa yed even if vehicle-to-vehi-
cle distance decreases: ●
When your vehicle and the vehicle ahead ar e traveling at the same speed or the vehi-
cle ahead is traveling more quickly than your vehicle●
When the vehicle ahead is traveling at a very low speed ●
Immediately after cruise control speed is set ●
At the instant the accelerator pedal is depressed ■
The LDA (Lane Departure Alert with steering control) lane departure warning func-
tion
In the following situations, th e warning message will not be displayed even if a lane line is
crossed. ●
When the vehicle speed deviates from the operating range of the LDA system func-
tions (  P. 266)●
When the lane lines cannot be recognized (  P. 267)■
Resetting the message indicating ma intenance is required (if equipped)
Make sure to reset the oil change system. (  P. 385, 403)■
Conditions that the tire pressure wa rning system may not function properly
 P. 417 ■
Warning buzzer
 P. 457

5017-2. Steps to take in an emergency
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U) 7
When trouble arises WARNING ■
When using the spare tire ●
Remember that the spare tire provided is specifically designed for use with your vehi-
cle. Do not use your spare tire on another vehicle. ●
Do not use more than one spare tires simultaneously. ●
Replace the spare tire with a stan dard 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:
Also, not only can the following system not be utilized fully, but it may even negatively
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 mp h (80 km/h) when a spar e tire is installed on
the vehicle.
The spare tire is not designed for driving at high speeds. Fa ilure to observe this precau-
tion may lead to an accident causing 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 possibilit y of personal injury during a collision or sudden brak-
ing.
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 performance.■
When replacing the tires
When removing or fitting the wheels, tires or the tire pressure warning valve and trans-
mitter, contact your Lexus dealer as the tire pressure warning valve and transmitter
may be damaged if not handled 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)

619Alphabetical index
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)Cleaning......................................... 376, 381
Aluminum wheels .............................. 377
Exterior....................................................376
Interior ...................................................... 381
Seat belts ............................................... 382
Clock ......................................................... 355
Coat hooks..............................................358
Compass .................................................. 366
Condenser .............................................. 406
Console box ............................................ 351
Cooling system ..................................... 404
Engine overheating...........................526
Cruise control
Dynamic radar cruise control..... 268
Cup holders ............................................ 352
Current fuel consumption ....... 108, 122
Curtain shield airbags ........................... 40
Customizable features ....................... 569 Daytime running light system...........226
Defogger
Outside rear view mirrors ............338
Rear window........................................338
Windshield............................................338
Differential
Front differential .................................545
Rear differential................................... 546
Dimension ............................................... 536
Dinghy towing ....................................... 206
Display
Drive information...................... 108, 122
Dynamic radar cruise control .....268
LDA (Lane Departure Alert
with steering control) ................... 265
Multi-information display....... 103, 118
Warning message.............................460
Distance ...........................................108, 122
Do-it-yourself maintenance............... 391
Door courtesy lights
Location ................................................. 347
Door lock
Doors.........................................................145
Smart access system with
push-button start ..............................156
Wireless remote control..................140 D

620 Alphabetical index
RC350_RC300 AWD_RC3 00_RC F_U(OM24748U)Doors...........................................................145
Automatic door locking
and unlocking system.................... 148
Door lock .................................................147
Open door warning buzzer.......... 146
Open door warning light...............454
Outside rear view mirrors .............. 178
Side windows ........................................ 182
Drive info 1/Drive info 2/
Drive info 3 ................................. 108, 122
Drive information ........................ 108, 122
Resetting......................................... 106, 119
Drive-Start Control .................... 193, 218
Driver’s seat position memory ..........166
Driving.........................................................192
Break-in tips .......................................... 193
Correct driving posture .................... 32
Driving mode select switch ........... 301
Procedures ............................................ 192
Winter drive tips ................................ 320
DRS (Dynamic Rear Steering) .........312
Warning message ............................ 460
Dynamic radar cruise control ......... 268
Dynamic Rear Steering (DRS) .........312
Warning message ............................ 460 Eco drive mode.......................................301
Eco Driving Indicator ...................116, 132
Eco Driving Indicator Light......... 111, 129
Eco driving meter ....................................96
EDR (Event data recorder)................... 10
Elapsed time...................................108, 122
Electric Power Steering (EPS) ......... 313
Warning light ....................................... 454
Electronic key .......................................... 140
Battery-saving function ................... 158
If the electronic key does not
operate properly ............................. 518
Replacing the battery .......................427
Emergency flashers .............................442
Emergency tire puncture
repair kit................................................ 502 E