tow Lexus IS250 2015 Owner's Guide

1994-5. Using the driving support systems
4
Driving
IS350/250_U (OM53C50U)
Pressing the button changes the vehi-
cle-to-vehicle distance as follows:Long
Medium
Short
The vehicle-to-vehicle distance is set
automatically to long mode when the
engine switch is turned to IGNITION
ON mode.
If a vehicle is running ahead of you, the preceding vehicle mark will also be displayed.
Select a distance from the table below. Note that the distances shown corre-
spond to a vehicle speed of 50 mph (80 km/h). Vehicle-to-vehicle distance
increases/decreases in accordance with vehicle speed.
Pulling the lever toward you cancels
the cruise control.
The speed setting is also canceled when
the brakes are applied.
Pushing the lever up resumes the
cruise control and returns vehicle
speed to the set speed.
Resuming is available when the vehicle
speed is more than approximately 25
mph (40 km/h).
Changing the vehicle-to-vehicle distance
Preceding
vehicle mark
1
2
3
Vehicle-to-vehicle distance settings
Distance optionsVehicle-to-vehicle distance
LongApproximately 160 ft. (50 m)
MediumApproximately 130 ft. (40 m)
ShortApproximately 100 ft. (30 m)
Canceling and resuming the speed control
1
2

2064-5. Using the driving support systems
IS350/250_U (OM53C50U)
CAUTION
■Situations unsuitable for dynamic radar cruise control
Do not use dynamic radar cruise control in any of the following situations.
Doing so may result in inappropriate speed control and could cause an accident result-
ing in death or serious injury.
●In heavy traffic
●On roads with sharp bends
●On winding roads
●On slippery roads, such as those covered with rain, ice or snow
●On steep downhills, or where there are su dden changes between sharp up and down
gradients
Vehicle speed may exceed the set speed when driving down a steep hill.
●At entrances to expressways
●When weather conditions are bad enough that they may prevent the sensors from
functioning correctly (fog, snow, sandstorm, heavy rain, etc.)
●When an approach warning buzzer is heard often
●During emergency towing
■When the 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 approach
warning ( →P. 201) will not be activated, and a fatal or serious accident may result.
●Vehicles that cut in suddenly
●Vehicles traveling at low speeds
●Vehicles that are not moving
●Vehicles with small rear ends (trailers with no load on board etc.)
●Motorcycles traveling in the same lane
■Conditions under which the ve hicle-to-vehicle distance control may not function cor-
rectly
Apply the brakes as necessary in the following conditions as the radar sensor may not
be able to correctly detect vehicles ahead, and a fatal or serious accident may result:
●When water or snow thrown up by the surrounding vehicles hinders the functioning
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

2194-5. Using the driving support systems
4
Driving
IS350/250_U (OM53C50U)
■Sensor detection information
●The sensor’s detection areas are limited to the areas around the vehicle’s front corner
and rear bumpers.
●Certain vehicle conditions and the surrounding environment may affect the ability of
the sensor to correctly detect obstacles. Particular instances where this may occur are
listed below.
• There is dirt, snow or ice on the sensor . (Wiping the sensors will resolve this prob-
lem.)
• The sensor is frozen. (Thawing th e area will resolve this problem.)
In especially cold weather, if a sensor is frozen the screen may show an abnormal
display, or obstacles may not be detected.
• The sensor is covered in any way.
• The vehicle is leaning co nsiderably to one side.
• On an extremely bumpy road, on an incline, on gravel, or on grass.
• The vicinity of the vehicle is noisy due to vehicle horns, motorcycle engines, air
brakes of large vehicles, or other loud noises producing ultrasonic waves.
• There is another vehicle equipped with parking assist sensors in the vicinity.
• The sensor is coated with a sheet of spray or heavy rain.
• The vehicle is equipped with a fender pole or wireless antenna.
• Towing eyelets are installed.
• The bumper or sensor receives a strong impact.
• The vehicle is approaching a tall or curved curb.
• In harsh sunlight or intense cold weather.
• The area directly under the bumpers is not detected.
• If obstacles draw too close to the sensor.
• A non-genuine Lexus suspension (lowered suspension etc.) is installed.
• People may not be detected if they are wearing certain types of clothing.
In addition to the examples above, there are instances in which, because of their shape,
signs and other objects may be judged by the sensor to be closer than they are.
●The shape of the obstacle may prevent the sensor from detecting it. Pay particular
attention to the following obstacles:
• Wires, fences, ropes, etc.
• Cotton, snow and other materials that absorb sound waves
• Sharply-angled objects
• Low obstacles
• Tall obstacles with upper sections projecting outwards in the direction of your vehi-
cle
●The following situations may occur during use.
• Depending on the shape of the obstacle and other factors, the detection distance may shorten, or detect ion may be impossible.
• Obstacles may not be detected if they are too close to the sensor.
• There will be a short delay between obst acle detection and display. Even at slow
speeds, there is a possibility that the obstacl e will come within the sensor’s detection
areas before the display is shown and the warning beep sounds.
• Thin posts or objects lower than the sensor may not be detected when approached, even if they have been detected once.
• It might be difficult to hear beeps due to the volume of the audio system or air flow noise of the air conditioning system.

2735-1. Basic Operations
5
Lexus Display Audio system
IS350/250_U (OM53C50U)
■Adjusting the volume
The volume of the Mobile Assistant can be adjusted using the
“PWR·VOL” knob or
steering wheel volume switches. The Mobile Assistant and phone call volumes are syn-
chronized.
■Microphone
●Wait for the listening beeps before using the Mobile Assistant.
●The Mobile Assistant may not recognize commands in the following situations:
• When spoken too quickly.
• When spoken at a low or high volume.
• When the roof or windows are open.
• When passengers are talking while th e Mobile Assistant is being used.
• When the air conditioning system’s fan speed is set high.
• When the air conditioning vents are turned toward the microphone.
■Mobile Assistant precautions
●The available features and functions may vary based on the iOS version installed on the
connected device.
●Some Siri features are limited in Eyes Free mode. If you attempt to use an unavailable
function, Siri will inform you that the function is not available.
●If Siri is not enabled on the ce llular phone connected via Bluetooth, an error message
will be displayed on the screen.
●While a phone call is active, the Mobile Assistant cannot be used.
●If using the navigation feature of the cellular phone, ensure the active audio source is
Bluetooth audio or iPod in order to hear turn by turn direction prompts.
It is not necessary to speak directly into the
microphone when using the Mobile Assistant.

3515-12. Other function
5
Lexus Display Audio system
IS350/250_U (OM53C50U)
●Voice commands may not be recognized if:
• Spoken too quickly.
• Spoken at a low or high volume.
• The roof or windows are open.
• Passengers are talking while voice commands are spoken.
• The air conditioning speed is set high.
• The air conditioning vents are turned towards the microphone.
●In the following conditions, the system may not recognize the command properly and
using voice commands may not be possible:
• The command is incorrect or unclear. Note that certain words, accents or speech patterns may be diffi cult for the system to recognize.
• There is excessive background noise, such as wind noise.
■When searching for a track
●A USB memory or iPod must be connected to enable track searching and playback.
( → P. 2 74 )
●When a USB memory or iPod is connected, recognition data is created so tracks can
be searched using voice commands.
●Recognition data is updated under the following conditions:
• When the USB memory or iPod data has changed.
• When the voice recognition language is changed. (→ P. 2 76 )
●While the recognition data is being created or being updated, a track search cannot be
performed using a voice command.
■The Gracenote® media database
→ P. 2 9 9
Due to natural language speech recognition technology, this system enables rec-
ognition of a command when spoken naturally. However, the system cannot rec-
ognize every variation of each command.
In some situations, it is possible to omit the command for the procedure and
directly state the desired operation.
This function is available in English, Spanish and French.
Casual speech recognization

3736-3. Using the storage features
6
Interior features
IS350/250_U (OM53C50U)
CAUTION
●Do not place anything other than cups or aluminum cans in the cup holders and bot-
tle in the bottle holders. Other items may be thrown out of the holders in the event of
an accident or sudden braking, causing injury.
●To prevent burns, cover hot drinks when placed in the cup holders.
NOTICE
To prevent damage to the rear cup holder, stow the cup holder before stowing the arm-
rest.

3746-3. Using the storage features
IS350/250_U (OM53C50U)
Raise the hooks when needed.
The cargo hooks are provided for
securing loose items.
Loosen the belt
Ti g h t e n t h e b e l t
Trunk features
Cargo hooks
CAUTION
To avoid injury, always return the cargo hooks to their stowed positions when not in use.
First-aid kit storage belt
1
2

3896-4. Using the other interior features
6
Interior features
IS350/250_U (OM53C50U)
■Circling calibration
When “C” appears on the display,
drive the vehicle at 5 mph (8 km/h)
or less in a circle until a direction is
displayed.
If there is not enough space to drive
in a circle, drive around the block
until the direction is displayed.
■Conditions unfavorable to correct operation
The compass may not show the correct direction in the following conditions:
●The vehicle is stopped immediately after turning.
●The vehicle is on an inclined surface.
●The vehicle is in a place where the earth's magnetic field is subject to interference by
artificial magnetic fields (underground car park/parking lot, under a steel tower,
between buildings, roof car park/parking lot, near an intersection, near a large vehicle,
etc.).
●The vehicle has become magnetized.
(There is a magnet or metal object near the inside rear view mirror.)
●The battery has been disconnected.
●A door is open.
CAUTION
■While driving the vehicle
Do not adjust the display. Adjust the di splay only when the vehicle is stopped.
■When doing the circling calibration
Secure a wide space, and watch out for people and vehicles in the neighborhood. Do
not violate any local traffic rules while performing circling calibration.
NOTICE
■To avoid compass malfunctions
Do not place magnets or any metal objects near the inside rear view mirror.
Doing this may cause the compass sensor to malfunction.
■To ensure normal operation of the compass
●Do not perform circling calibration of the compass in a place where the earth's mag-
netic field is subject to interference by artificial magnetic fields.
●During calibration, do not operate electric systems (moon roof, power windows, etc.)
as they may interfere with the calibration.

3936-4. Using the other interior features
6
Interior features
IS350/250_U (OM53C50U)
■Stolen Vehicle Location
If your vehicle is stolen, Safety Connect can work with local authorities to
assist them in locating and recovering the vehicle. After filing a police report,
call the Safety Connect response center at 1-800-25-LEXUS (1-800-255-
3987) and follow the prompts for Safety Connect to initiate this service.
In addition to assisting law enforcement with recovery of a stolen vehicle,
Safety-Connect-equipped vehicle location data may, under certain circum-
stances, be shared with third parties to locate your vehicle. Further informa-
tion is available at Lexus.com.
■Emergency Assistance Button (“SOS”)
In the event of an emergency on the road, push the “SOS” button to reach the
Safety Connect response center. The answering agent will determine your
vehicle’s location, assess the emergency, and dispatch the necessary assis-
tance required.
If you accidentally press the “SOS” button, tell the response-center agent that you
are not experiencing an emergency.
■Enhanced Roadside Assistance
Enhanced Roadside Assistance adds GPS data to the already included war-
ranty-based Lexus roadside service.
Subscribers can press the “SOS” button to reach a Safety Connect response-
center agent, who can help with a wide range of needs, such as: towing, flat
tire, fuel delivery, etc. For a description of the Roadside Assistance services
and their limitations, please see the Safety Connect Terms and Conditions,
which are available at Lexus.com.

409
IS350/250_U (OM53C50U)
7
Maintenance and care
7-3. Do-it-yourself maintenance
Do-it-yourself service precautions
If you perform maintenance by yourself, be sure to follow the correct proce-
dure as given in these sections.
ItemsParts and tools
Battery condition
(→ P. 4 2 0 )•Warm water• Baking soda•Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
(→ P. 4 1 9 )• SAE J1703 or FMVSS No.116 DOT 3 brake fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine coolant level
(→ P. 4 1 7 )
• “Toyota Super Long Life Coolant” or a similar high quality
ethylene glycol-based non-silicate, non-amine, non-nitrite
and non-borate coolant with long-life hybrid organic acid
technology
For the U.S.A.:
“Toyota Super Long Life Coolant” is pre-mixed with 50%
coolant and 50% deionized water.
For Canada:
“Toyota Super Long Life Coolant” is pre-mixed with 55%
coolant and 45% deionized water.
• Funnel (used only for adding coolant)
Engine oil level
(→ P. 4 1 4 )• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses
(→ P. 4 4 1 )• Fuse with same amperage rating as original
Light bulbs
(→ P. 444)
• Bulb with same number and wattage rating as original
• Phillips-head screwdriver•Flathead screwdriver
•Wrench
Radiator and con-
denser ( →P. 4 1 8 )
Tire inflation pres-
sure ( →P. 4 3 2 )• Tire pressure gauge• Compressed air source
Wa s h e r f l u i d
(→ P. 4 2 2 )• Water or washer fluid containing antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)