2014 Lexus IS250C stop start

201
2-4. Using other driving systems
2
When driving
IS250C/350C_U
Selecting conventional constant speed control mode
Constant speed control mode differs from vehicle-to-vehicle distance
control mode. When constant speed co ntrol mode is selected, your vehi-
cle will maintain a set speed regardless of whether or not there are other
vehicles in the lane ahead.
Press the “ON-OFF” button to
activate the cruise control.
Cruise control indicator will come
on.
Press the button again to deacti-
vate the cruise control.
Switch to constant speed con-
trol mode.
(Push the lever forward and
hold for approximately one sec-
ond.)
When in constant speed control
mode, to return to vehicle-to-vehi-
cle distance control mode, push
the lever forward again and hold
for approximately 1 second.
After the desired speed has been
set, it is not possible to return to
vehicle-to-vehicle distance control
mode.
If the “ENGINE START STOP”
switch is turned off and then turned
to IGNITION ON mode again, the
vehicle will automatically return to
vehicle-to-vehicle distance control
mode.

214
2-4. Using other driving systems
IS250C/350C_U
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. 220
■EPS (Electric Power Steering)
Employs an electric motor to reduce the amount of effort needed to turn
the steering wheel.

217
2-4. Using other driving systems
2
When driving
IS250C/350C_U
■When the message is displayed on the multi-information display showing that
TRAC has been disabled even if the VSC off switch has not been pressed
TRAC and hill-start assist control cannot be operated. Contact your Lexus dealer.
■Automatic reactivation of the TRAC/VSC systems
If the TRAC/VSC systems are turned off, re-starting the engine will automatically
reactivate them.
■Automatic TRAC reactivation
If only the TRAC system is turned off, the TRAC system will turn on when vehicle
speed increases.
■Automatic TRAC and VSC reactivation
If the TRAC and VSC systems are turned off, the systems will not turn on even when
vehicle speed increases.
■Sounds and vibrations caused by the ABS, brake assist, VSC and TRAC systems
●A sound may be heard from the engine compartment if the brake pedal is
depressed repeatedly when the engine is started or just after the vehicle begins
to move. This sound does not indicate that a malfunction has occurred in any of
these systems.
●Any of the following conditions may occur when the above systems are operat-
ing. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after the ABS is activated.
• The brake pedal may move down slightly after the ABS is activated.

220
2-4. Using other driving systems
IS250C/350C_U
Hill-start assist control
■Hill-start assist control can be operated when
●The shift lever is in a position other than P.
●The parking brake is not applied.
●The accelerator pedal is not depressed.
■Hill-start assist control
●While hill-start assist control is operating, the brakes remain automatically
applied after the driver releases the brake pedal. The stop lights and the high
mounted stoplight turn on.
●Hill-start assist control operates for about 2 seconds after the brake pedal is
released.
●If the slip indicator does not flash and the buzzer does not sound when the brake
pedal is further depressed, slightly reduce the pressure on the brake pedal (do
not allow the vehicle to roll backward) and then firmly depress it again. If the sys-
tem still does not operate, check if the operating conditions explained above
have been met.
Hill-start assist control helps to prevent the vehicle from rolling backwards
when starting on an incline or slippery slope.
To engage hill-start assist con-
trol, further depress the brake
pedal when the vehicle is
stopped completely.
A buzzer will sound once to
indicate the system is activated.
The slip indicator will also start
flashing.

251
3-1. Using the air conditioning system and defogger
3
Interior features
IS250C/350C_U
Rear window and outside rear view mirror defoggers
■The defogger can be operated when
The “ENGINE START STOP” switch is in IGNITION ON mode.
■When the retractable hardtop is open
The rear window defogger is not operable. The indicator will come on if the outside
rear view mirror defoggers are used.
CAUTION
■When the outside rear view mirror defoggers are on
Do not touch the outside surface of the rear view mirror, as it can become very hot
and burn you.
These features are used to defog the rear window, and to remove rain-
drops, dew and frost from the outside rear view mirrors.
With navigation system
Owners of models equipped with a navigation system should refer to the
“Navigation System Owner's Manual”.
Without navigation system On/off
The defoggers will automatically
turn off after 15 to 60 minutes.
The operation time changes
according to the ambient tem-
perature and vehicle speed.

252
3-1. Using the air conditioning system and defogger
IS250C/350C_U
Windshield wiper de-icer∗
■The windshield wiper de-icer can be operated when
The “ENGINE START STOP” switch is in IGNITION ON mode.
CAUTION
■When the windshield wiper de-icer is on
The surface of the glass at the lower part and sides of the windshield become very
hot. To prevent burning yourself, do not touch these areas.
This feature is used to prevent ice from building up on the windshield and
wiper blades.
On/off
The windshield wiper de-icer
will automatically turn off after
approximately 15 minutes.
∗: If equipped

317
3-3. Using the Bluetooth® audio system
3
Interior features
IS250C/350C_U
Selecting a portable player to be used
Select “Connect Audio Player (Connect)” using a voice com-
mand or , and .
Pattern A
Select the portable player to be used by either of the following
methods, and select “Confirm” by using a voice command or , and :
a. Press the talk switch and say the name of the desired portable player.
b. Press the talk switch and say “List Audio Players”. When the name of the desired portable player is read aloud, press the
talk switch.
Pattern B Select the portable player to be used using , and .
Pattern A
Press the talk switch and say “From Car” or “From Audio player”,
and select “Confirm” by using a voice command or ,
and .
Pattern B
Select “From Car” or “From Audio”, using , and .
If “From Car” is selected, the portable player will be automatically con-
nected whenever the “ENGINE START STOP” switch is in either
ACCESSORY or IGNITION ON mode.
STEP1
STEP2
STEP2
STEP3
STEP3

354
IS250C/350C_U
3-5. Using the interior lights
Interior lights list
Your Lexus is equipped with the illuminated entry system to assist in enter-
ing the vehicle. Owing to the function of the system, the lights shown in the
following illustration automatically turn on/off according to the presence of
the electronic key, whether the door s are locked/unlocked, whether the
doors are opened/closed, and the “ENGINE START STOP” switch mode.
Personal lights (→P. 355)
Interior light ( →P. 355)
Shift lever light (when the “ENGINE START STOP” switch is in
ACCESSORY or IGNITION ON mode)
Door courtesy lights
Scuff lights (if equipped)
Front foot well lights
Outer foot lights
Turning the instrument panel light control knob fully to the left disables the
shift lever light and front foot well lights.