2015 LEXUS RC F brake sensor

2954-5. Using the driving support systems
4
Driving
RC350/RCF_U (OM24636U)
WA R N I N G
■Limitations of the pre-collision system
●The driver is solely responsible for safe driving. Always drive safely, taking care to
observe your surroundings.
Never use the pre-collision safety system instead of normal braking operations. This
system is not designed to avoid or reduce collisions in every situation. Overly relying
on the system or entrusting it with safety may lead to an accident resulting in death or
serious injury.
Although this system is designed to suppor t in avoiding a collision or reducing the
damage of a collision, its effectiveness may change according to various conditions
(  P. 292, 293). Therefore, the system may not always provide the same perfor-
mance. Also, pre-collision braking function may not operate depending on the oper-
ations of the driver. If the driver is stepping on the brake pedal or is operating the
steering wheel, the system may determine th at the driver is taking evasive action and
pre-collision braking func tion may not operate.
●As the pre-collision system is designed to assi st the driver in safe driving, it may oper-
ate under sporty driving conditions, whic h may cause an accident. For this reason
under sporty driving conditions, it is reco mmended that this system be disabled by
using the PCS OFF switch.
■Handling the radar sensor
Observe the following to ensure the pre-collision 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 surr ounding area to a strong impact.
If the sensor moves even slightly off posi tion, the system may become inaccurate or
malfunction. If the sensor or surrounding area is subject to a strong impact, always
have the area inspected and adjusted by your Lexus dealer.
●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 your Lexus dealer.

5538-2. Steps to take in an emergency
8
When trouble arises
RC350/RCF_U (OM24636U)
*: Refer to the separate “Scheduled Maintenance” or “Owner’s Manual Supplement”
for the maintenance interval applicable to your vehicle.
(If equipped)
Indicates that the Automatic High Beam switch is
pressed 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-collision brake system
operation is stopped Operation of the pre-collision brake assist and the
steering control (if equipped) of the PCS (Pre-Colli-
sion system) are also stopped.
 Turn the VSC on. ( P. 285)
(If equipped)
Indicates that the PCS (Pre-Collision System) is not cur-
rently functional because the grille cover or the sensor is
dirty
 Check the grille cover and the sensor and clean
them if they are dirty.
Indicates that operation of large electricity consuming
systems such as the air conditioning system are sus-
pended
Stop using unnecessary electric components to
reduce electricity consumption. Wait a while until
the electric power supply is restored.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)

662What to do if... (Troubleshooting)
RC350/RCF_U (OM24636U)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? ( P. 5 3 4 )
●The parking brake indicator is on
Is the parking brake released? ( P. 2 0 5 )
Depending on the situation, other type s of warning buzzer may also sound.
( P. 533, 539)

●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. ( P. 7 8 )
To stop the alarm, turn the engine switch to IGNITION ON mode or start the
engine.
●Is the electronic key left inside the vehicle or the moon roof opened?
Check the message on the multi-information display. ( P. 5 3 9 )
●When a warning light turns on or a warning message is displayed, refer to
P. 533, 539. 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

675Alphabetical index
RC350/RCF_U (OM24636U)
Odometer ..........................................90, 96
OilEngine oil............................................... 607
Front differential oil............................... 611
Rear differential oil .............................. 612
Opener Hood ........................................................475
Trunk ........................................................... 141
Outer foot lights.................................... 428
Outside rear view mirrors ................. 168 Adjusting and folding........................ 168
Blind spot monitor............................. 297
Linked mirror function when reversing ................................. 169
Mirror position memory .................. 157
Outside rear view mirror defoggers ............................420
Outside temperature.....................90, 96
Overheating ........................................... 597 Paddle shift switches................. 201, 202
Parking assist sensors
(intuitive parking assist)...................254
Parking brake ........................................ 205
Parking lights ......................................... 208 Light switch...........................................208
Replacing light bulbs .........................519
PCS (Pre-Collision System)............ 290 PCS OFF switch .................................. 291
Warning light ....................................... 534
Personal lights ....................................... 430
Pop-up display ............................... 107, 119
Power outlet ........................................... 436
Power steering (Electric power steering system) ................................ 283 Warning light ....................................... 534
Power windows.........................................171 Door lock linked window operation ........................... 173
Jam protection function.................... 172
Operation.................................................. 171
Window lock switch ............................ 171
Pre-Collision System (PCS)............ 290 PCS OFF switch .................................. 291
Warning light ....................................... 534
OP
*: For vehicles with a navigation system, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL”.