steering wheel Lexus IS250C 2010 Do-It-Yourself Maintenance / LEXUS 2010 IS350C/250C (OM53A20U) Service Manual

196
2-4. Using other driving systems
CAUTION
■When the radar sensor may not be correctly detecting the vehicle ahead
Apply the brakes as necessary when any of the following types of vehicles are in
front of you.
As the sensor may not be able to correctly detect these types of vehicles, the prox-
imity alarm ( P. 478) will not be activated, and an accident may result.
●Vehicles that cut in suddenly
●Vehicles traveling at low speeds
●Vehicles that are not moving
●Vehicles with small rear ends (tra ilers with no load on board etc.)
●Motorcycles traveling in the same lane
■Conditions under which the vehicle-to-vehicle distance control may not function
correctly
Apply the brakes as necessary in the foll owing conditions as the radar sensor may
not be able to correctly detect vehicles ahead, and an accident may result.
●When water or snow thrown up by the surrounding vehicles hinders the function-
ing of the sensor
●When your vehicle is pointing upwards (caused by a heavy load in the trunk, etc.)
●When the road curves or when the lanes are narrow
●When steering wheel operation or your position in the lane is unstable
●When the vehicle ahead of you decelerates suddenly

204
2-4. Using other driving systems
Driving assist systems
To help enhance driving safety and performance, the following systems
operate automatically in response to various driving situations. Be aware,
however, that these systems are supplementary and should not be relied
upon too heavily when operating the vehicle.
■ABS (Anti-lock Brake System)
Helps to prevent wheel lock when the brakes are applied suddenly, or if
the brakes are applied while driving on a slippery road surface.
■Brake assist
Generates an increased level of braking force after the brake pedal is
depressed, when the system detects a panic stop situation.
■VSC (Vehicle Stability Control)
Helps the driver to control skidding when swerving suddenly or turning on
slippery road surfaces.
■ TRAC (Traction Control)
Maintains drive power and prevents the rear wheels from spinning when
starting the vehicle or accelerating on slippery roads.
■Hill-start assist control
 P. 2 1 0
■EPS (Electric Power Steering)
Employs an electric motor to reduce the amount of effort needed to turn
the steering wheel.

208
2-4. Using other driving systems
■EPS operation sound
When the steering wheel operates, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.
■Reduced effectiveness of EPS
The effectiveness of EPS is reduced to prevent the system from overheating when
there is frequent steering input over an extended period of time. The steering wheel
may feel heavy as a result. Should this occur, refrain from excessive steering input or
stop the vehicle and turn the engine OFF. The system should return to normal within
10 minutes.
■If the slip indicator comes on
It may indicate a malfunction in the VSC or TRAC function.
Contact your Lexus dealer.
CAUTION
■The ABS does not operate effectively when
●The limits of tire gripping performance have been exceeded.
●The vehicle hydroplanes while driving at high speed on the wet or slick road.
■Stopping distance when the ABS is operating will exceed that of normal condi-
tions
The ABS is not designed to shorten the vehicle’s stopping dist ance. Always main-
tain a safe distance from the vehicle in front of you in the following situations.
●When driving on dirt, gravel or snow-covered roads
●When driving with tire chains
●When driving over bumps in the road
●When driving over roads with potholes or roads with uneven roads

228
3-1. Using the air conditioning system and defogger
Automatic air conditioning system ........... 230
Rear window and outside rear view mirror
defoggers .............................. 238
3-2. Using the audio system Audio system type ................. 239
Using the radio ....................... 242
Using the CD player ............. 250
Playing back MP3 and WMA discs ........................... 257
Operating an iPod
®.............. 265
Operating a USB memory.................................. 273
Optimal use of the audio system..................................... 282
Using the AUX adapter....... 284
Using the steering wheel audio switches ......... 286
Interior features3

240
3-2. Using the audio system
Ti t l ePa g e
Using the radioP. 2 4 2
Using the CD playerP. 2 5 0
Playing back MP3 and WMA discsP. 2 5 7
Operating an iPod®P. 2 6 5
Operating a USB memoryP. 2 7 3
Optimal use of the audio systemP. 2 8 2
Using the AUX adapterP. 2 8 4
Using the steering wheel audio switchesP. 2 8 6

286
3-2. Using the audio system
Using the steering wheel audio switches
Turning on the power
Press when the audio system is turned off.
The audio system can be turned off by holding down until you hear a
beep.
Some audio features can be controlled using the switches on the steering
wheel.
Turns the power on, selects
an audio source
Increases/decreases volume
Radio mode: Selects a radio station
CD mode: Selects a track, file (MP3 and
WMA) and disc
Bluetooth
® audio mode
(type A):
Selects a track and
album
iPod
® mode:
Selects a song
USB memory mode: Selects a file and folder

288
3-2. Using the audio system
Selecting an albumPress to select Bluetooth
® audio mode.
Press and hold “ ” or “ ” on until you hear a beep.
Selecting a folder
Press to select USB memory mode.
Press and hold “ ” or “ ” on until you hear a beep.
Selecting a disc in the CD player
Press to select the CD mode.
Press and hold “ ” or “ ” on until you hear a beep.
CAUTION
■To reduce the risk of an accident
Exercise care when operating the audio switches on the steering wheel.
STEP1
STEP2
STEP1
STEP2
STEP1
STEP2

298
3-3. Using the Bluetooth® audio system
Fast-forwarding and rewinding tracksTo fast-forward or rewind, press and hold “ ” or “ ” on until you
hear a beep.
Random playback Press (RAND).
Repeat playPress (RPT).
Scanning tracksPress .
Switching the displayPress .
Each time is pressed, the display changes in the order of Elapsed time
 Album title  Track title  Artist name.
Using the steering wheel audio switches
 P. 2 8 6

312
3-4. Using the hands-free phone system (for mobile phones)
■Steering wheel switches
Vo l u m e
During an incoming call:
Adjusts the ring tone volume
During an ongoing call:
Adjusts the receiver volume
The voice guidance volume can-
not be adjusted using this but-
ton.
Off-hook switch
Turns the hands-free system
on/starts a call
On-hook switch
Turns the hands-free system
off/ends a call/refuses a call
Talk switch
Turns the voice command
system on (press)/turns the
voice command system off
(press and hold)
■ Microphone

351
3-7. Other interior features
3
Interior features
■Changing the settings
Each item is displayed and its setting can be changed only in the following condi-
tions:
●Intuitive parking assist: When the “ENGINE START STOP” switch is in IGNI-
TION ON mode.
●Items other than the above: When the “ENGINE START STOP” switch is in
IGNITION ON mode and the vehicle is stopped.
■Display
The display will return to the original display if the satellite switches are not oper-
ated for an extended period.
Even if the display is in satellite switch mo de, it will switch in the event of a warning
or when the radar cruise control (if equipped) is used. If this occurs, press any of the
satellite switches or “DISP” switch on the steering wheel to return the display to sat-
ellite switch mode.