2010 Lexus GS450h light

220
2-4. Using other driving systems
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
CAUTION
■If the hill-start assist control does not operate effectively
Do not overly rely on the hill-start assist control. The hill-start assist control may not
operate effectively on steep inclines and roads covered in ice.
■When the Enhanced VSC is activated
The slip indicator light flashes and a warning buzzer sounds. Always drive carefully.
Reckless driving may cause an accident. Exercise particular care when the indica-
tor light flashes and a buzzer sounds.
■When TRAC and Enhanced VSC are off
Be especially careful and drive at a speed appropriate to the road conditions. As
these are systems to ensure vehicle stability and driving force, do not turn off TRAC
and Enhanced VSC unless necessary.
■Replacing tires
Make sure that all tires are of the same size, brand, tread pattern and total load
capacity. In addition, make sure that the tires are inflated to the specified tire pres-
sure level.
The ABS and Enhanced VSC will not function correctly if different tires are fitted on
the vehicle.
Contact your Lexus dealer for further information when replacing tires or wheels.
■Handling of tires and suspension
Using tires with any kind of problem or modifying the suspension will affect the driv-
ing assist systems, and may cause the system to malfunction.

221
2-4. Using other driving systems
2
When driving
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
PCS (Pre-Collision System)
: If equipped
When the radar sensor detects that a frontal collision is highly likely or
even unavoidable, safety systems such as the brakes and seat belts are
automatically engaged to lessen impact and injuries to occupants as well as
vehicle damage.
■Pre-collision seat belts (front seats only)
If the pre-collision sensor detects that a collision is unavoidable, the pre-
collision system will retract the seat belt before the collision occurs.
The same will happen if the driver makes an emergency braking or loses
control of the vehicle. (P. 7 7 )
■Pre-collision brake assist
Applies greater braking force in relation to how strongly the brake pedal is
depressed.
■Pre-collision braking
When there is a high possibility of a frontal collision, the system warns the
driver using a warning light, warning display and buzzer. If the system
determines that a collision is unavoidable, the brakes are automatically
applied to reduce the collision speed. Pre-collision braking can be dis-
abled using the pre-collision braking off button.
■AV S
If the system determines that the collision is unavoidable, the operation of
AV S (P. 213) helps prevent the vehicle front from going down when
hard brakes are applied.

222
2-4. Using other driving systems
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
Disabling pre-collision braking
Pre-collision braking enabled
Pre-collision braking disabled
The “PCS” warning light flashes
when pre-collision braking is dis-
abled.
Radar sensor
Detects vehicles or other obsta-
cles on or near the road ahead and
determines whether a collision is
imminent based on the position,
speed, and heading of the obsta-
cles.
Grille cover
Radar sensor

224
2-4. Using other driving systems
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
■Conditions that may trigger the system even if there is no danger of collision
●When there is an object by the roadside at the entrance to a curve
●When passing an oncoming vehicle on a curve
●When driving over a narrow iron bridge
●When there is a metal object on the road surface
●When driving on an uneven road surface
●When passing an oncoming vehicle on a left-turn
●When your vehicle rapidly closes on the vehicle in front
●When a grade separation/interchange, sign, billboard, or other structure
appears to be directly in the vehicle’s line of travel
●When an extreme change in vehicle height occurs
●When there is an abnormality in the radar sensor
●When climbing a steep hill causes an overhead billboard or other metallic struc-
ture to appear directly in the vehicle’s line of travel
When the system is activated in the situations described above there is also a possi-
bility that the seat belts will retract quickly and the brakes will be applied with a force
greater than normal. When the seat belt is locked in the retracted position, stop the
vehicle in a safe place, release the seat belt and refasten.
■When there is a malfunction in the system
Warning lights and/or warning messages will turn on or flash. (P. 535, 546)

226
2-4. Using other driving systems
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
CAUTION
■Handling the radar sensor
Observe the following to ensure the pre-collision system can function effectively.
●Keep the sensor and front grille clean at all times.
Clean the sensor and front grille 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 position, the system may malfunction. If the
sensor or surrounding area are subject to a strong impact, always have the area
inspected and adjusted by a 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.
■Limitations of the pre-collision system
Do not rely on the pre-collision system. Always drive safely, taking care to observe
your surroundings and checking for any obstacles or other road hazards.

Interior features3
241
GS_HV_U (OM30C81U)
February 1, 2010 11:04 am
3-3. Using the audio system
Audio system type.................. 270
Using the radio........................ 273
Using the CD/DVD 
player ..................................... 282
Playing an audio CD ............ 285
Playing MP3 and 
WMA discs........................... 289
Playing DVD video/audio 
(with DVD player) ............... 293
Playing a video CD 
(with DVD player) ............... 307
CD/DVD player and DVD 
video disc information ........ 310
Listening to Bluetooth
® 
audio......................................... 321
Listening to a USB memory/
iPod
®...................................... 329
Optimal use of the audio/
video system ......................... 339
Using the AUX port ............... 341
Using the steering 
switches .................................. 3423-4. Using the hands-free system 
(for cellular phone)
Hands-free system 
(for cellular phone) ............. 345
Using a Bluetooth
® 
phone ....................................... 351
Setting the hands-free system 
(for cellular phone) ............. 366
3-5. Using the interior lights
Interior lights list .................... 395
3-6. Using the storage features
List of storage features......... 398
3-7. Other interior features
Sun visors ................................. 406
Vanity mirrors ......................... 407
Clock ......................................... 408
Outside temperature 
display..................................... 409
Ashtrays..................................... 410
Cigarette lighter ...................... 411
Power outlet ............................. 412
Seat heaters/ventilators ....... 413
Armrest ..................................... 415
Rear sunshade ......................... 416
Floor mats ................................. 419
Trunk features .......................... 421
Garage door opener ............ 423
Compass .................................. 429
Safety Connect ...................... 433

246
3-1. Using the touch screen
GS_HV_U (OM30C81U)
January 28, 2010 10:42 am
Adjusting the display
Press .
Adjust the display as desired using “-” / “+” /“R” / “G”.
If you do not touch the screen for 20 seconds, the system will return to
the previous screen.
*: Vehicles with DVD player only, displays during DVD video/audio or video
CD playback
STEP1
STEP2
“R”“G”
“Color ”*RedGreen
“-”“+”
“Tone”*LighterDarker
“Contrast”LowerHigher
“Brightness”DarkerBrighter

247
3-1. Using the touch screen
3
Interior features
GS_HV_U (OM30C81U)
January 28, 2010 10:42 am
■To avoid damaging the touch screen
●Touch the screen lightly with your finger. If there is no response, remove your fin-
ger from the screen and try again.
●Remove any dirt on the screen by wiping with a soft cloth. Do not use detergent.
■When using the touch screen
●If the screen is cold, the display may be dark, or the system may seem to be
operating slightly slower than normal.
●The screen may seem dark and hard to see when viewed through sunglasses.
Change your angle of viewing, adjust the display on the “Display” screen or
remove your sunglasses.
■Changing between day mode and night mode
■To turn off the display
If “Screen Off” is touched, the screen display is turned off, and guidance is by voice
only.
When the headlights are turned on, the
screen dims.
However, the screen can be switched to day
mode by touching “Day Mode”.
The screen will stay in day mode when the
headlights are turned on until “Day Mode”
is touched again.
The switch will not be displayed if the
instrument panel light control is set to the
brightest level.