2017 LEXUS RX300H brake sensor

3134-5. Using the driving support systems
4
Driving
RC300h_EE(OM24740E)
■The pre-crash safety system is operational when
The pre-crash safety system is enable d and the following conditions are met:
●Pre-crash warning:
• Vehicle speed is greater than about 15 km/h (10 mph).
• The speed at which your vehicle is approaching the obstacle or the vehicle running ahead of you is greater than about 15 km/h (10 mph).
●Pre-crash brake assist:
• The VSC system is not disabled. • Vehicle speed is greater than about 30 km/h (19 mph).
• The speed at which your vehicle is approaching the obstacle or the vehicle running ahead of you is greater than about 30 km/h (19 mph).• The brake pedal is depressed.
●Pre-crash braking:
• The VSC system is not disabled.
• Vehicle speed is greater than about 15 km/h (10 mph). • The speed at which your vehicle is approaching the obstacle or the vehicle runningahead of you is greater than about 15 km/h (10 mph).
●Suspension control:
• Vehicle speed is greater than about 5 km/h (4 mph).
• The speed at which your vehicle is approaching the obstacle or the vehicle running ahead of you is greater than about 30 km/h (19 mph).
■Conditions that may trigger the system even if there is no danger of a collision
In any of the following situations where the frontal area of the radar sensor is interrupted, the radar sensor may detect possibility of a frontal collision and the system may be acti- vated.
●When passing by an oncoming vehicle in a curve or a turn to the right or the left
●When rapidly approaching an obstacle ahead (e.g. preceding vehicle, toll gate barrier, etc.)
●When there is a structural object (billboard, low ceiling, fluorescent light, etc.) above the uphill road ahead
●When driving on a narrow road or throug h under a low overhead structure (bridge,
tunnel, fly-under, etc.)
●When driving on an uneven road surface
●When there is a metal object, bump, or protrusion on the road surface
●When vehicle’s front part is raised or lowered depending on loading conditions
●When the direction of radar sensor is misaligned by strong impact applied on an area
around the radar sensor, etc.
●When there is an obstacle (guard rail, etc.) by the roadside at the entrance to a curve
●When the front of your vehicle is pointing upwards (caused by putting a heavy load in
the trunk etc.)
When the system is activated in the situations described above, there is also a possibility that the brakes may be applied with a force greater than normal.

3174-5. Using the driving support systems
4
Driving
RC300h_EE(OM24740E)
WARNING
■Limitations of the pre-crash safety system
●The driver is solely responsible for safe driving. Always drive safely, taking care to observe your surroundings.
Do not use the pre-crash safety system in stead of normal braking operations under any circumstances. This system will not pr event collisions or lessen damage or inju- ries in all cases. Do not overly rely on this system. Failure to do so may cause an acci-
dent, resulting in death or serious injury.
●This system has been designed to help avoid and reduce the impact of collisions. However, the system operates differe ntly depending on the situation (P. 313). As a
result, the same level of performance may no t be expected in all cases. Also, the pre- crash safety brakes may not operate if th e driver is depressing the brake pedal or turning the steering wheel, as the system will determine such conditions as collision
avoidance operations.
●As the pre-crash safety system is designed to assist the driver in safe driving, it may operate under sporty driving conditions, which may cause an accident. For this rea-
son under sporty driving conditions, it is recommended that this system be disabled by using the PCS OFF switch.
■Handling the radar sensor
Observe the following to ensure the pre-crash safety system can function effectively. Otherwise, the system may not function correctly and could result in an accident.
●Keep the sensor and grille cover clean at all times.
Clean the sensor and grille cover with a soft cloth so you do not mark or damage them.
●Do not subject the sensor or surrounding area to a strong impact.
If the sensor moves even slightly off po sition, the system may become inaccurate or malfunction. If the sensor or surrounding area is subject to a strong impact, alwayshave the area inspected and adjusted by an y authorized Lexus dealer or repairer, or
another duly qualified an d equipped professional.
●Do not disassemble the sensor.
●Do not attach accessories or stickers to the sensor, grille cover or surrounding area.
●Do not modify or paint the sensor and grille cover.
●If the radar sensor needs to be replaced, contact any authorized Lexus dealer or repairer, or another duly qualified and equipped professional.

5458-2. Steps to take in an emergency
8
When trouble arises
RC300h_EE(OM24740E)
Indicates a malfunction in the Lexus parking assist-sen-
sor A buzzer also sounds. Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
Indicates that a Lexus parking assist-sensor is dirty or
covered with ice A buzzer also sounds. Clean the sensor.
Indicates that the accelerator pedal is depressed while the shift position is in NA buzzer also sounds.
 Release the accelerator pedal and shift the shift lever to D, S or R.
Indicates that the accelerator pedal is depressed to stopthe vehicle on an upward slope, etc.
A buzzer also sounds.  Release the accelerator pedal and depress the brake pedal.
Warning messageDetails/Actions
(Flashes)
(Flashes)

5478-2. Steps to take in an emergency
8
When trouble arises
RC300h_EE(OM24740E)
Indicates that the vehicle is being driven at 5 km/h (3 mph) or more with the parking brake still engaged
A buzzer also sounds.  Release the parking brake.
Indicates a malfunction in: • The SRS airbag system; or• The seat belt pretensioner system
A buzzer also sounds.  Have the vehicle inspected by any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
Indicates a malfunction in: •The ABS; or• The brake assist system
A buzzer also sounds.  Have the vehicle inspected by any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
Indicates that the engine coolant temperature is too high
A buzzer also sounds.  P. 587
(If equipped)
Indicates that the radar sensor is dirty or covered with ice
A buzzer also sounds.  Clean the sensor.
Warning messageDetails/Actions
(Flashes)

5548-2. Steps to take in an emergency
RC300h_EE(OM24740E)
Indicates that the engine oil is scheduled to be changed.
(The indicator will not work properly unless the message has been reset.) Check the engine oil, and change if necessary.
After changing the engine oil, the message should be reset.
Indicates that the engine oil should be changed. (Afterthe engine oil is changed and the message has been
reset.)  Check and change the engine oil, and oil filter by any authorized Lexus dealer or repairer, or another
duly qualified and equipped professional. After changing the engine oil, the message should bereset.
(If equipped)
Indicates that the Automatic High Beam switch ispressed while the headlights are in low beam.
 Turn the high beam on and press the Automatic High Beam switch again.
(If equipped)
Indicates that, since the VSC (Vehicle Stability Control)system was turned off, the pre-crash brake system oper-
ation is stopped Operation of the pre-crash brake assist is alsostopped.
 Turn the VSC on. (P. 307)
(If equipped)
Indicates that the PCS (Pre-Crash Safety system) is not currently functional because the grille cover or the sen- sor is dirty
 Check the grille cover and the sensor and clean them if they are dirty.
Warning messageDetails/Actions
(Flashes)

622What to do if... (Troubleshooting)
RC300h_EE(OM24740E)
●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. 196)
●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. 217)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? ( P. 539)
●The parking brake indicator is on
Is the parking brake released? ( P. 230)
Depending on the situation, other types of warning buzzer may also sound.
( P. 537, 542)

●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. 102)
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 con-
trol. • 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 th e horn sounds (if equipped)

633Alphabetical index
RC300h_EE(OM24740E)
Navigation system*
Odometer................................................... 115
Oil
Differential oil ...................................... 603
Engine oil .............................................. 599
Opener
Hood .......................................................... 471
Trunk ......................................................... 150
Outer foot lights .................................... 446
Outside rear view mirrors ................. 193
Adjusting and folding.........................193
BSM (Blind Sport Monitor)............319
Linked mirror function
when reversing..................................194
Mirror position memory.................. 183
Outside rear view mirror
defoggers ..........................................438
Outside temperature .............................115
Overheating ...........................................587
Paddle shift switches ................ 224, 225
Parking assist sensors......................... 279
Parking brake......................................... 230
PCS
(Pre-Crash Safety system)............... 311
PCS OFF switch.................................. 312
Warning light....................................... 538
Personal lights........................................ 448
Pollen removal mode.......................... 438
Pop-up display.........................................126
Pop Up Hood............................................ 56
Power control unit .................................. 89
Power control unit coolant ............... 478
Capacity...................................................601
Checking ............................................... 478
Preparing and checking before
winter ....................................................337
Power outlet ........................................... 456
Power steering (Electric power
steering system)................................. 304
Warning light....................................... 538
Power switch ............................................215
Power windows .......................................196
Door lock linked window
operation..............................................198
Jam protection function ................... 197
Operation ............................................... 196
Window lock switch .......................... 196
Pre-Crash Safety system (PCS) ....... 311
PCS OFF switch.................................. 312
Warning light....................................... 538
N
O
P

636Alphabetical index
RC300h_EE(OM24740E)
Smart entry & start system................. 155
Antenna location................................. 155
Entry functions............................ 144, 150
Starting the hybrid system...............215
SMS (Short message service) .........405
Snow mode ............................................. 223
Snow tires................................................. 339
Spark plug................................................. 601
Specifications .........................................596
Speech command system ................ 429
Speed indicator ...................................... 126
Speedometer ............................................115
Sport mode............................................... 301
Steering lock .............................................217
Column lock release.......................... 217
Steering wheel ........................................ 189
Adjustment............................................. 189
Audio switches................................... 350
Auto tilt away ........................................ 190
Heated steering wheel.................... 444
Steering wheel position
memory................................................ 183
Stop lights
Emergency brake signal ............... 305
Replacing light bulbs........................525
Storage feature...................................... 449
Stuck
If the vehicle becomes stuck ........592
Sun shade .................................................. 201
Sun visors ................................................. 455
Switches
ASC (Active Sound Control)
switch...................................................... 231
Audio remote control
switches.............................................. 350
Automatic High Beam switch ..... 235
BSM (Blind spot monitor)
switch ..................................................... 319
Cruise control switch .......... 253, 257
Door lock switches............................. 146
Driving mode select switch............301
Driving position memory
switches ................................................183
Dynamic radar cruise control
switch ....................................................257
Emergency flashers switch........... 528
EV drive mode switch .................... 220
Fog light switch................................... 239
Heated steering wheel switch .... 444
Ignition switch ....................................... 215
LDA (Lane Departure
Alert) switch ..................................... 274
Lexus parking assist-sensor
switch ....................................................279
Light switch............................................232
Meter control switches..................... 123
Moon roof switches ......................... 200
Outside rear view mirror
switches ................................................ 193
Paddle shift switches.............224, 225
PCS OFF switch.................................. 312
Power door lock switch................... 146
Power switch ......................................... 215
Power window switches.................. 196
Rear window and outside rear
view mirror defoggers
switch ................................................... 438
Seat heater switches ........................ 445
Seat ventilator switches.................. 445
Snow mode switch ............................223
Talk switch.............................................408
Telephone switches .........................408