brake sensor Lexus IS300h 2013 User Guide

3084-5. Using the driving support systems
IS300h_EE(OM53B95E)
Limitations of the pre-crash safety system
Do not overly rely on the pre-crash safety system. Always drive safely, taking
care to observe your surroundings and checking for any obstacles or other road
hazards.
Failure to do so may cause an accident resulting in death or serious injury.
Handling the radar sensor
Observe the following to ensure the pre-crash safety system can function effec-
tively. 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 dam-
age them.
Do not subject the sensor or surrounding area to a strong impact.
If the sensor moves even slightly off position, the system may malfunction. If
the sensor or surrounding area is subject to a strong impact, always have the
area inspected and adjusted by any authorized Lexus dealer or repairer, or
another duly qualified and 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.
Do not replace them with non-genuine parts.
Cautions regarding the assist contents of the system
By means of alarms and brake control, the pre-crash safety system is intended
to assist the driver in avoiding collisions through the process of LOOK-
JUDGE-ACT. There are limits to the degree of assistance the system can pro-
vide, so please keep in mind the following important points.
Assisting the driver in watching the road
The pre-crash safety system is only able to detect obstacles directly in front of
the vehicle, and only within a limited range. It is not a mechanism that allows
careless or inattentive driving, and it is not a system that can assist the driver
in low-visibility conditions. It is still necessary for the driver to pay close
attention to the vehicle’s surroundings.
Assisting the driver in making correct judgment
When attempting to estimate the possibility of a collision, the only data avail-
able to the pre-crash safety system is that from obstacles it has detected
directly in front of the vehicle. Therefore, it is absolutely necessary for the
driver to remain vigilant and to determine whether or not there is a possibility
of collision in any given situation.
Assisting the driver in taking action
The pre-crash safety system’s braking assist feature is designed to help reduce
the severity of a collision, and so only acts when the system has judged that a
collision is unavoidable. This system by itself is not capable of automatically
avoiding a collision or bringing the vehicle to a stop safely. For this reason,
when encountering a dangerous situation the driver must take direct and
immediate action in order to ensure the safety of all involved.

5118-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53B95E)*
1: Parking brake engaged warning buzzer:
P. 518
*2: Open door warning buzzer:
P. 516
*3: Seat belt warning buzzer:
The seat belt warning buzzer sounds to alert the driver, front passenger and
rear passengers 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 will sound in a different tone for 90
more seconds.
Passenger detection sensor, seat belt reminder and warning buzzer
If luggage is placed on a passenger seat, the passenger detection sensor may
cause the warning light to flash and the warning buzzer to sound even if a pas-
senger is not sitting in the seat.
If a cushion is placed on the seat, the sensor may not detect a passenger, and the
warning light may not operate properly.
If the malfunction indicator lamp comes on while driving
The malfunction indicator lamp will come on if the fuel tank becomes com-
pletely empty. If the fuel tank is empty, refuel the vehicle immediately. The mal-
function indicator lamp will go off after several trips.
If the malfunction indicator lamp does not go off, contact any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional as soon as
possible.
Electric power steering system warning light (warning buzzer)
When the 12-volt battery charge becomes insufficient of the voltage temporarily
drops, the electric power steering system warning light may come on and the
warning buzzer may sound.
When the tire pressure warning light comes on
Carry out the following procedure after the tire temperature has lowered suffi-
ciently.
Check the tire inflation pressure and adjust to the appropriate level.
If the warning light does not go out even after several minutes, check that the
tire inflation pressure is at the specified level and carry out initialization.
The warning light may come on again if the above operations are conducted
without first allowing the tire temperature to lower sufficiently.
The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such as natu-
ral air leaks and tire inflation pressure changes caused by temperature. In this
case, adjusting the tire inflation pressure will turn off the warning light (after a
few minutes).
Conditions that the tire pressure warning system may not function properly
P. 454

5168-2. Steps to take in an emergency
IS300h_EE(OM53B95E)
Indicates that:
• The brake fluid level is low; or
• The brake system is malfunctioning
A buzzer also sounds.
Immediately stop the vehicle in a safe place and
contact any authorized Lexus dealer or repairer,
or another duly qualified and equipped profes-
sional. Continuing to drive the vehicle may be
dangerous.
Indicates a malfunction in the hybrid system
A buzzer also sounds.
Immediately stop the vehicle in a safe place and
contact any authorized Lexus dealer or repairer,
or another duly qualified and equipped profes-
sional.
Indicates that one or more of the doors is not fully
closed
The system also indicates which doors are not
fully closed.
If the vehicle reaches a speed of 5 km/h (3 mph),
flashes and a buzzer sounds to indicate
that the door(s) are not yet fully closed.
Make sure that all the doors are closed.
Indicates that the hood is not fully closed
If the vehicle reaches a speed of 5 km/h (3 mph),
flashes and a buzzer sounds to indicate
that the hood is not yet fully closed.
Close the hood.
Indicates that the trunk is not fully closed
If the vehicle reaches a speed of 5 km/h (3 mph),
flashes and a buzzer sounds to indicate
that the trunk is not yet fully closed.
Close the trunk.
(If equipped)
Indicates a malfunction in the Lexus parking
assists-sensor
The assist-sensors flash.
A buzzer also sounds.
Have the vehicle inspected by any authorized
Lexus dealer or repairer, or another duly quali-
fied and equipped professional.
Warning messageDetails/Actions

5188-2. Steps to take in an emergency
IS300h_EE(OM53B95E)
Indicates a malfunction in the EPS (Electric Power
Steering) system
A buzzer also sounds.
Have the vehicle inspected by any authorized
Lexus dealer or repairer, or another duly quali-
fied and equipped professional.
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 quali-
fied 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 quali-
fied and equipped professional.
Indicates that the engine coolant temperature is too
high
A buzzer also sounds.
P. 5 5 6
(If equipped)
Indicates that the radar sensor is dirty or covered
with ice
A buzzer also sounds.
Clean the sensor.
Warning messageDetails/Actions
(Flashes)

5238-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53B95E)
(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-crash brake
system operation is stopped
Turn the VSC on. (P. 295)
(If equipped)
Indicates that the PCS (Pre-Crash Safety system) is
not currently 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 consum-
ing systems such as the air conditioning system are
suspended
Stop using unnecessary electric components to
reduce electricity consumption. Wait a while
until the electric power supply is restored.
(If equipped)
Indicates that the LDA (Lane Departure Alert) sys-
tem cannot be used because the vehicle speed is
lower than approximately 50 km/h (32 mph)
Drive the vehicle at 50 km/h (32 mph) or higher.
Warning messageDetails/Actions
(Flashes)

590What to do if... (Troubleshooting)
IS300h_EE(OM53B95E)
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. 184)
The auto power off function will be operated if the vehicle is left in
ACCESSORY or ON mode (the hybrid system is not operating) for a
period of time. (P. 211)
The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? (P.
509)
The parking brake indicator is on
Is the parking brake released? (P. 224)
Depending on the situation, other types of warning buzzer may also
sound.
(P. 507, 514)

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. 9 6 )
To stop the alarm, turn the power switch to ON mode or 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)

604Alphabetical index
IS300h_EE(OM53B95E)
Paddle shift switches .................218
Parking assist sensors ................271
Parking brake ............................224
PCS
(Pre-Crash Safety system) ......299
Function ................................299
PCS OFF switch ...................301
Warning light........................508
Personal lights ...........................412
Wattage .................................572
Pollen removal mode.................404
Pop-up display ...........................118
Pop Up Hood ...............................56
Power control unit .......................83
Power control unit coolant ........444
Capacity ................................567
Checking ...............................444
Preparing and checking before
winter .................................311Power easy access system ........ 170
Power outlet.............................. 421
Power steering (Electric power
steering system) ..................... 293
Warning light ....................... 508
Power switch ............................ 209
Power windows ........................ 184
Door lock linked window
operation............................ 186
Jam protection function ....... 185
Operation ............................. 184
Window lock switch ............ 184
Pre-Crash Safety system (PCS) 299
Function ............................... 299
PCS OFF switch .................. 301
Warning light ....................... 508
P

611Alphabetical index
IS300h_EE(OM53B95E)
Warning buzzers
Approach warning ................254
Brake system ........................507
Downshifting ........................220
Driver’s and front
passenger’s seat belt
reminder ............................ 509
Lexus parking assist-sensor ..271
Open door .............................509
Pre-crash braking ..................299
Rear passengers’ seat belt
reminder .............................509
Warning lights ...........................105
ABS ......................................508
Automatic headlight leveling
system.................................509
Brake system ........................507
Charging system ...................507
Driver’s and front
passenger’s seat belt
reminder light .....................509
Electric power steering
system.................................508
Low fuel level .......................509
Malfunction indicator lamp ..507
Master warning light ............509
Open door .............................509
Pre-crash safety system ........508
Rear passengers’ seat belt
reminder lights ...................509
Slip indicator ........................508
SRS .......................................508
Tire pressure .........................510Warning messages .................... 514
Warning reflector storage belt .. 419
Washer ...................................... 235
Checking .............................. 446
Preparing and checking
before winter ..................... 311
Switch .................................. 235
Washing and waxing ................ 426
Weight ...................................... 562
Wheels ...................................... 468
Replacing ............................. 468
Size ...................................... 570
Window glasses ........................ 184
Window lock switch ................. 184
Windows................................... 184
Power windows.................... 184
Rear window defogger......... 404
Windshield wiper de-icer ......... 405
Windshield wipers .................... 235
Intermittent windshield wipers
with interval adjuster ......... 235
Rain-sensing windshield
wipers ................................ 237
Winter driving tips.................... 311
Wireless remote control............ 130
Battery-Saving Function ...... 150
Locking/Unlocking ...... 136, 143
Replacing the battery ........... 472
WMA disc ................................ 341
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