2019 LEXUS RCF brake sensor

288 4-5. Using the driving support systems
RC F_U WARNING ■
When using the intuitive parking assist
Observe the following precautions.
Failing to do so may result in the vehicle be ing unable to be driv en safely and possibly
cause an accident. ●
Do not use the sensor at speeds in excess of 6 mph (10 km/h). ●
The sensors’ detection areas and reaction ti mes are limited. When moving forward or
reversing, check the areas surrounding the vehicle (especially th e sides of the vehi-
cle) for safety, and drive slowly, using the brake to control the vehicle’s speed. ●
Do not install accessories within the sensors’ detection areas.■
Limitations of the sensors ●
RC350/RC300: The detection areas of the sensors are limited to the areas around
the vehicle’s front and rear bumpers. ●
RC F: The detection areas of the sensors are limited to the areas around the vehicle’s
front corners and the rear bumpers. ●
Certain vehicle conditions and surrounding environments, such as the following, may
affect the ability of th e sensors to correctly detect obje cts. Pay particul ar attention in
the following situations. Failure to do so may result in the vehicle being driven
unsafely, possibly leading to an accident.
• When there is dirt, snow or ice on a se nsor (Cleaning the sensor will resolve this
problem.)
• When the sensor is frozen (Thawing the area will resolve this problem.)
In especially cold weather, if a sensor is frozen the screen may show an abnormal
display, or objects may not be detected
• When a sensor is covered in any way
• When the vehicle is leaning considerably to one side
• When driving on an extremely bump y road, incline, gravel, or grass
• When 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
• When there is another vehicle equipped with parking assist sensor in the vicinity
• When the sensor is coated with a sheet of spray or heavy rain
• When the vehicle is equipped with a fender pole or wireless antenna
• When a towing eyelet is installed
• When a bumper or sensor receives a strong impact
• When the vehicle is approaching a tall or curved curb
• When driving in harsh sunlig ht or intense cold weather
• When an object is directly under a bumper
• When objects become too close to the sensors
• When a non-genuine Lexus suspension (lowered suspension, etc.) is installed
In addition to the situations above, there are instances in which, because of their
shape, signs and other objects may be judged by the sensor to be closer than they
are.

378 6-1. Maintenance and care
RC F_U ■
Brake ●
Painted brake calipers (if equipped)
• When using detergent, use ne utral detergent. Do not use hard brushes or abrasive
cleaners, as they will damage the paint.
• Do not use detergent on the brake calipers when they are hot.
• Wash detergent off immediately after use. ●
RC F: Rust may form if the vehicle is parked with wet brake pads or disc rotors, causing
them to stick. Before parking the vehicle af ter it is washed, drive slowly and apply the
brakes several times to dry the parts. ■
Bumpers
Do not scrub with abrasive cleaners. ■
Side windows water-repelle nt coating (if equipped)●
The following precautions can extend the effectiveness of the water-repellent coating.
• Remove any dirt, etc. from the side windows regularly.
• Do not allow dirt and dust to accumulate on the windows for a long period.
Clean the windows with a soft, damp cloth as soon as possible.
• Do not use wax or glass cleaners that co ntain abrasives when cleaning the windows.
• Do not use any metallic objects to remove condensation build up.●
When the water-repellent performance has become insufficient, the coating can be
repaired. Contact your Lexus dealer.
WARNING ■
When washing the vehicle
Do not apply water to the inside of the engine compartment. Doing so may cause the
electrical components etc. to catch fire. ■
When cleaning the windshield (vehicles with rain-sensing windshield wipers)
●
When the upper part of the windshield where the raindrop se nsor is located is
touched by hand ●
When a wet rag or similar is held close to the raindrop sensor ●
If something bumps against the windshield ●
If you directly touch the raindrop sensor bo dy or if something bumps into the raindrop
sensorSet the wipers to the intermittent windshield
wipers. (  P. 236)
If AUTO mode is selected, the wipers may
operate unexpectedly in the following situa-
tions, and may result in hands being caught or
other serious injuries and cause damage to the
wiper blades.

454 7-2. Steps to take in an emergency
RC F_U (U.S.A.)
(Canada)
Parking brake warning light (warning buzzer)
* 1
Indicates that the parking brake is engaged
 Release the parking brake.
Electric power steering system warning light (warning buzzer)
Indicates a malfunction in the EPS (Electric Power Steering) sys-
tem
 Have the vehicle inspected by your Lexus dealer immediately.
LDA (Lane Departure Alert) indicator
If the LDA indicato r is illuminated:
Indicates a malfunction in the LDA (Lane Departure Alert with
steering control) system.
 Check the warning message displa yed on the multi-information
display. (  P. 460)
If the LDA indicator flashes:
Indicates that the vehicle has deviated from the lane (while the
LDA [Lane Departure Alert with stee ring control] system is oper-
ating)
 Check the area around the vehicle and return the vehicle to
between the lane lines. (Flashes or illuminates)
PCS warning light
Indicates a malfunction in the PCS (Pre-Collision System) or that
the system is temporarily unavailable due to the vehicle being
extremely hot/cold, or dirt around a front sensor, etc.
 Follow the instructions displaye d on the multi-information dis-
play. (  P. 260, 470)
If the PCS (Pre-Collision System ) or VSC (Vehicle Stability Con-
trol) system is disabled, the PC S warning light will illuminate.
(  P. 260)
Slip indicator
Indicates a malfunction in:
• The VSC (Vehicle Stability Control) system;
• The TRAC (Traction Control) system; or
• The hill-start assist control system
The light will flash when the VSC or the TRAC system is operating.
 Have the vehicle inspected by your Lexus dealer immediately. (If equipped)
Automatic headlight leve ling system warning light
Indicates a malfunction in the automatic headlight leveling system
 Have the vehicle inspected by your Lexus dealer immediately.
Open door warning light (warning buzzer)
* 2
Indicates that a door or the trunk is not fully closed
 Check that both side doors and the trunk are closed.Warning light Warning light/Details/Actions

614 What to do if... (Troubleshooting)
RC F_U ●
The seat belt reminder light is flashing
Are the driver and the front passe nger wearing the seat belts? (  P. 455)●
The parking brake indicator is on
Is the parking brake released? (  P. 222)
Depending on the situation, other type s of warning buzzer may also sound.
(  P. 453, 460)
●
Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. (  P. 80)
Do one of the following to de activate or stop the alarms:• Unlock the doors.
• Open the trunk using the entry function or wireless remote control.
• Turn the engine switch to ACCESSORY or IGNITION ON mode, or start the
engine.
●
Is the electronic key left inside th e vehicle or the moon roof opened?
Check the message on the multi-information display. (  P. 460)
●
When a warning light turns on or a wa rning message is displayed, refer to
P. 453, 460. 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

627Alphabetical index
RC F_U Odometer ........................................... 91, 96
Oil
Engine oil............................................... 540
Front differential oil........................... 545
Rear differential oil ............................ 546
Opener
Hood ........................................................393
Trunk ........................................................... 151
Outer foot lights.................................... 347
Outside rear view mirrors ..................178
Adjusting and folding........................ 178
Blind spot monitor............................ 290
Linked mirror function
when reversing ..................................179
Mirror position memory .................. 166
Outside rear view
mirror defoggers ........................... 338
Outside temperature...................... 91, 96
Overheating ........................................... 526 Paddle shift switches................... 215, 216
Parking assist sensors
(intuitive parking assist).................. 280
Parking brake .........................................222
Parking lights ..........................................225
Light switch........................................... 225
Replacing light bulbs ....................... 439
PCS (Pre-Collision System)............ 250
Warning light ....................................... 454
Personal lights ....................................... 349
Pop-up display ................................. 111, 129
Power outlet ........................................... 355
Power steering (Electric power
steering system) .................................. 313
Warning light ....................................... 454
Power windows....................................... 182
Door lock linked
window operation ...........................184
Jam protection function................... 183
Operation................................................182
Window lock switch ..........................182
Pre-Collision System (PCS)............ 250
Warning light ....................................... 454O P
* : Refer to the “NAVIGATIO N AND MULTIMEDIA SYSTEM
OWNER’S MANUAL”.