2017 Lexus IS300h brake sensor

3044-5. Using the driving support systems
IS300h_EE(OM53D89E)
■Conditions under which the vehicle-to-vehicle distance control mode may not function correctly
In the case of the following conditions, op erate the brake pedal (or accelerator pedal,
depending on the situ ation) as necessary. As the sensor may not be able to correctly detect vehicles ahead, the system may not
operate properly.
●When the vehicle ahead of you decelerates suddenly
●When your vehicle is pointing upwards
(caused by a heavy load in the luggage com- partment, etc.)
●Preceding vehicle has an extremely high
ground clearance
●When the road curves or when the lanes are narrow
●When steering wheel operation or your posi-
tion in the lane is unstable

3154-5. Using the driving support systems
4
Driving
IS300h_EE(OM53D89E)
■The Lexus parking assist-sensor can be operated when
●Front corner sensors:
• The power switch is in ON mode. • The shift lever is in other than P.
• The vehicle speed is less th an about 10 km/h (6 mph).
(At any speed when the shift lever is in R)
●Front center sensors:
• The power switch is in ON mode. • The shift lever is in other than P or R.
• The vehicle speed is less th an about 10 km/h (6 mph).
●Rear corner and rear center sensors:
• The power switch is in ON mode.
• The shift lever is in R.
■Lexus parking assist-sensor display
Vehicles with a Lexus Display Audio system: When an obstacle is detected while the
Lexus parking assist monitor is in use, the warning indicator will appear in the upper part of the screen even if the disp lay setting has been set to off.
■If a message is displayed on the multi-information display
 P. 581
■Customization
Some functions can be customized. ( P. 314,657)
WARNING
■When using the Lexus parking assist-sensor
Observe the following precautions.
Failing to do so may result in the vehicle be ing unable to be driven safely and possibly
cause an accident.
●Do not use the sensor at speeds in excess of 10 km/h (6 mph).
●The sensors’ detection areas and reaction times are limited. When moving forward or
reversing, check the areas surrounding the vehicle (especially the 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.

3164-5. Using the driving support systems
IS300h_EE(OM53D89E)
WARNING
■Sensor detection information
●The sensor’ detection areas are limited to the areas around the vehicle’ bumper.
●Certain vehicle conditions and surrounding environments, such as the following, may
affect the ability of the sensor s to correctly detect objects. Pay particular attention in the following situations. Failure to do so may result in the vehicle being driven
unsafely, possibly leading to an accident.
• There is dirt, snow or ice on the sensor. (Wiping the sensors will resolve this prob- lem.)
• The sensor is frozen. (Thawing th e area will resolve this problem.)
In especially cold weather, if a sensor is frozen the screen may show an abnormal dis- play, or obstacles may not be detected.
• The sensor is covered in any way.
• The vehicle is leaning considerably to one side. • 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 lo ud noises producing ultrasonic waves. • There is another vehicle equipped with parking assist sensors in the vicinity.
• The sensor is coated with a sheet of spray or heavy rain.
• The vehicle is equipped with a fender pole or wireless antenna. • Towing eyelets are installed.
• The bumper or sensor receives a strong impact.
• The vehicle is approaching a tall or curved curb. • In harsh sunlight or intense cold weather.
• The area directly under the bumpers is not detected.
• If obstacles draw too close to the sensor. • A non-genuine Lexus suspension (low ered suspension etc.) is installed.
• People may not be detected if they are wearing certain types of clothing.
In addition to the examples above, there ar e instances in which, because of their shape, signs and other objects may be judged by a sensor to be closer than they are.
●The shape of the obstacle may prevent a sensor from detecting it. Pay particular
attention to the following obstacles:
• Wires, fences, ropes, etc.
• Cotton, snow and other materi als that absorb sound waves
• Sharply-angled objects • Low obstacles
• Tall obstacles with upper sections projec ting outwards in the direction of your
vehicle • People, animals and other moving objects
• People wearing certain types of clothing

5788-2. Steps to take in an emergency
IS300h_EE(OM53D89E)
*1: Parking brake engaged warning buzzer:
 P. 587
*2: Open door warning buzzer:
 P. 583
*3: Seat belt warning buzzer:
The seat belt warning buzzer sounds to al ert the driver, front passenger and rear pas-
sengers that his or her seat belt is not fastened. The buzzer sounds for 30 seconds
after the vehicle reaches a speed of 20 km/h (12 mph). Then, if the seat belt is still unfastened, the buzzer w ill sound in a different tone for 90 more seconds.
■Front passenger detection sensor, seat belt reminder and warning buzzer
●If luggage is placed on the front passenger seat, the front passenger detection sensor
may cause the warning light to flash and the warning buzzer to sound even if a passen-
ger is not sitting in the seat.
●If a cushion is placed on the seat, the sens or may not detect a passenger, and the warn-
ing light may not operate properly.
■If the malfunction indicator lamp comes on while driving
The malfunction indicato r lamp will come on if the fuel tank becomes completely empty.
If the fuel tank is empty, refuel the vehi cle immediately. The malfunction indicator lamp
will go off after several trips.
If the malfunction indicator lamp does not go off, contact any authorized Lexus retailer or
Lexus authorized repairer, or any re liable repairer as soon as possible.
Rear passengers’ seat belt reminder lights (warning buzzer)*3
Warns the rear passengers to fasten their seat belts
 Fasten the seat belt.
Master warning light
A buzzer sounds and the warning light comes on and flashes to indicate that the master warning system has detected a malfunc-
tion.
 P. 581
Tire pressure warning light When the light comes on:
Low tire inflation pressure such as
• Natural causes ( P. 579) •Flat tire ( P. 610, 625)
 Adjust the tire inflation pressure to the specified level.
The light will turn off after a few minutes. In case the light does not turn off even if the tire inflat ion pressure is adjusted, have the
system checked by any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer. When the light comes on after blinking for 1 minute:
Malfunction in the tire pressure warning system
 Have the system checked by any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
Warning lightWarning light/Details/Actions

670What to do if... (Troubleshooting)
IS300h_EE(OM53D89E)
●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. 193)
●The auto power off function will be operated if the vehicle is left in ACCES-
SORY or ON mode (the hybrid system is not operating) for a period of time.
( P. 221)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? ( P. 577)
●The parking brake indicator is on
Is the parking brake released? ( P. 235)
Depending on the situation, other type s of warning buzzer may also sound.
( P. 575, 581)

●Did anyone inside the vehicle open a door or anything move inside the vehicle
during setting the alarm?
The sensor detects them and the alarm sounds. ( P. 92)
Do one of the following to deactivate or stop the alarm:
• Unlock the doors or open the trunk using the entry function or wireless
remote control.
• Start the hybrid system.
The windows do not open or close by operating the power window
switches
The power switch is turned off automatically
A warning buzzer sounds during driving
An alarm is activated and the horn sounds (if equipped)

684Alphabetical index
IS300h_EE(OM53D89E)
Paddle shift switches ...........................228
Parking assist sensors .........................309
Parking brake ......................................... 235
PCS (Pre-Collision System) ............ 265
Warning light ....................................... 577
Personal lights ........................................482
Wattage..................................................654
Pollen removal mode .......................... 474
Pop-up display ..........................................119
Pop Up Hood ............................................ 55
Power control unit .................................... 81
Power control unit coolant ................ 519
Capacity .................................................649
Checking ................................................ 519
Preparing and checking before
winter......................................................361
Power easy access system ................. 177
Power outlet ........................................... 492
Power steering (Electric power
steering system)................................. 352
Warning light....................................... 576
Power switch ............................................ 219
Power windows .......................................193
Door lock linked window
operation..............................................195
Jam protection function ................... 194
Operation ............................................... 193
Window lock switch .......................... 193
Pre-Collision System (PCS) ............ 265
Warning light........................................577
Radar cruise control (dynamic
radar cruise control) ........................ 293
Radiator ......................................................521
Radio.......................................................... 394
Rear Crossing Traffic Alert.............. 334
Rear fog light .......................................... 244
Replacing light bulb ......................... 562
Switch .......................................................244
Rear passengers’ seat belt
reminder lights ................................... 578
Rear seat .................................................... 175
Fold down the seatback .................. 175
Luggage security system ................ 153
P
R

687Alphabetical index
IS300h_EE(OM53D89E)
SMS (Short message service) ......... 429
Snow mode ............................................. 227
Snow tires................................................. 363
Spark plug................................................ 649
Specifications ......................................... 644
Speech command system ................ 457
Speedometer .......................................... 105
Sport mode..............................................348
Steering lock........................................... 222
Column lock release........................ 222
Steering wheel ........................................ 185
Adjustment ............................................. 185
Audio switches.................................... 374
Heated steering wheel.................... 479
Power easy access system ............. 177
Steering wheel position
memory ................................................. 177
Stop lights
Emergency brake signal ................353
Replacing light bulbs........................562
Storage feature......................................484
Stuck
If the vehicle becomes stuck ..........641
Sun visors .................................................. 491
Sunshade
Rear .......................................................... 493
Roof ........................................................... 198
Switches
ASC (Active Sound Control)..... 236
Audio remote control
switches ...............................................374
Automatic High Beam switch..... 240
BSM (Blind Spot Monitor)
switch ................................................... 334
Cruise control
switch .......................................305, 293
Door lock switches............................. 147
Driving mode select switch.......... 348
Driving position memory
switches .................................................177
Emergency flashers switch........... 566
EV drive mode switch .....................224
Fog light switch....................................244
Heated steering wheel
switch ................................................... 479
Ignition switch ....................................... 219
LDA (Lane Departure Alert)
switch ................................................... 282
Lexus parking assist-sensor
switch ................................................... 309
Light switch............................................237
Meter control switches....................... 114
Moon roof switches ........................... 197
Outside rear view mirror
switches ................................................189

690Alphabetical index
IS300h_EE(OM53D89E)
Units ..............................................................119
USB device ................................. 406, 455
Connecting........................................... 375
USB audio ............................................ 406
USB photo ............................................455
USB video ............................................ 406
USB port................................................... 375
Vanity lights .............................................. 491
Vanity lights ............................................491
Wattage..................................................654
Vanity mirrors ......................................... 491
VDIM (Vehicle Dynamics
Integrated Management) ..............353
Vehicle identification number ......... 645
Vehicle Stability Control
(VSC) .................................................... 352
Ventilators (seat ventilators) ........... 480
VSC (Vehicle Stability
Control)................................................. 352
Warning buzzers
Approach warning ...........................300
Downshifting........................................ 230
Driver’s and front
passenger’s seat belt
reminder ............................................ 577
Lexus parking assist-sensor ........ 309
Open door ............................................577
Pre-Collision braking...................... 266
Rear passengers’ seat belt
reminder ............................................. 578
Warning lights .......................................... 101
ABS .......................................................... 576
Brake system ....................................... 575
Charging system ............................... 575
Driver’s and front
passenger’s seat belt
reminder light....................................577
Electric power steering
system.................................................. 576
Low fuel level........................................577
Malfunction indicator lamp .......... 575
Master warning light ........................ 578
Open door ............................................577
Pre-Collision System .......................577
Rear passengers’ seat belt
reminder lights ................................ 578
Slip indicator .........................................577
SRS ........................................................... 576
Tire pressure........................................ 578
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