rear Lexus IS250C 2010 Workshop Manual

219
2-5. Driving information
2
When driving
10_IS250C/350C_U
Vehicle load limits
■Total load capacity and seating capacity
These details are also described on the tire and loading information label.
(→ P. 4 1 6 )
CAUTION
■Overloading the vehicle
Do not overload the vehicle.
It may not only cause damage to the tires, but also degrade steering and braking
ability, resulting in an accident.
Vehicle load limits include total load capacity, seating capacity, towing
capacity and cargo capacity.
■Total load capacity: 660 lb. (295 kg)
Total load capacity means the combined weight of occupants, cargo and
luggage.
■Seating capacity: 4 occupants (Front 2, Rear 2)
Seating capacity means the maximum number of occupants whose esti-
mated average weight is 150 lb. (68 kg) per person.
■Towing capacity
Lexus does not recommend towing a trailer with your vehicle.
■Cargo capacity
Cargo capacity may increase or decrease depending on the weight and
the number of occupants.

220
2-5. Driving information
10_IS250C/350C_U
Winter driving tips
Carry out the necessary preparations and inspections before driving the
vehicle in winter. Always drive the vehicle in a manner appropriate to the
prevailing weather conditions.
■Pre-winter preparations
● Use fluids that are appropriate to the prevailing outside tempera-
tures.
• Engine oil
• Engine coolant
• Washer fluid
● Have a service technician inspect the level and specific gravity of
battery electrolyte.
● Have the vehicle fitted with four snow tires or purchase a set of
tire chains for the rear tires.
Ensure that all tires are the specified size and the same brand, and that
chains match the size of the tires.
■Before driving the vehicle
Perform the following according to the driving conditions.
● Do not try to forcibly open a window or move a wiper that is fro-
zen. Pour warm water over the frozen area to melt the ice. Wipe
away the water immediately to prevent it from freezing.
● To ensure proper operation of the climate control system fan,
remove any snow that has accumulated on the air inlet vents in
front of the windshield.
● Remove any ice that has accumulated on the vehicle chassis.
● Periodically check for and remove any excess ice or snow that
may have accumulated in the wheel well or on the brakes.

221
2-5. Driving information
2
When driving
10_IS250C/350C_U
Selecting tire chainsUse the correct tire chain size when mounting the tire chains. Chain size
is regulated for each tire sizes. Side chain
(0.12 in. [3 mm] in diameter)
Cross chain
(0.16 in. [4 mm] in diameter)
Regulations on the use of tire chains
● Regulations regarding the use of tire chains vary according to location
and type of road. Always check local regulations before installing
chains.
● Install the chains on the rear tires.
● Retighten the chains after driving 1 /4  1 /2 mile (0.5  1.0 km).
■When driving the vehicle
Accelerate the vehicle slowly and drive at a reduced speed suitable
to road conditions.
■ When parking the vehicle (in the wi nter time or in the cold lati-
tudes)
Park the vehicle and move the shift lever to P (automatic transmis-
sion) or 1 or R (manual transmission) without setting the parking
brake. The parking brake may freeze up, preventing it from being
released. If necessary, block the wheels to prevent inadvertent slid-
ing or creeping.

222
2-5. Driving information
10_IS250C/350C_U
■Tire chain installation (17-inch tires only)
Observe the following precautions when installing and removing chains.
●Install and remove tire chains in a safe location.
●Install tire chains on the rear tires only. Do not install tire chains on front tires.
●Install the tire chains on rear tires as tightly as possible. Retighten chains after
driving 1 /4
 1/2 mile (0.5  1.0 km).
●Install tire chains following the instructions provided in the accompanying
instructions.
CAUTION
■Driving with snow tires
Observe the following precautions to reduce the risk of accidents.
Failing to do so may result in a loss of vehicle control and cause death or serious
injury.
●Use tires of the size specified for your vehicle.
●Maintain the recommended level of air pressure.
●Do not drive in excess of 75 mph (120 km/h), regardless of the type of snow tires
being used.
●Use snow tires on all, not just some wheels.
■Driving with tire chains (17-inch tires only)
Observe the following precautions to reduce the risk of accidents.
Failing to do so may result in the vehicle being unable to be driven safely, and may
cause death or serious injury.
●Do not drive in excess of the speed limit specified for the tire chains being used,
or 30 mph (50 km/h), whichever is lower.
●Avoid driving on bumpy road surfaces or over potholes.
●Avoid sudden turns and braking, as use of chains may adversely affect vehicle
handling.
●Slow down sufficiently before entering a curve to ensure that vehicle control is
maintained.

228
10_IS250C/350C_U
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
®
player ...................................... 265
Operating a USB memory player ...................................... 273
Optimal use of the audio system ..................................... 282
Using the AUX adapter....... 284
Using the steering wheel audio switches ......... 286

236
3-1. Using the air conditioning system and defogger
10_IS250C/350C_URear outlets
Direct air flow to the left or right,
up or down
Turn the knob fully to the outside
of the vehicle to close the vent
■Using the automatic mode
Fan speed is adjusted automatically in accordance with the temperature setting and
ambient conditions. As a result, the following may occur.
●Immediately after is pressed, the fan may stop for a while until warm or
cool air is ready to flow.
●Cool air may flow to the area around the upper body when the heater is on.
■Using the system in recirculated air mode
The windows will fog up more easily if the recirculated air mode is used for an
extended period.
■Switching between outside air and recirculated air modes
Recirculated air mode or outside air mode may be automatically switched to in
accordance with the temperature setting and the inside temperature. When the
retractable hardtop is opened, recirculated air mode is automatically selected.
■Window defogger feature
Recirculated air mode may automatically switch to
(outside air) mode in situ-
ations where the windows need to be defogged.
■When outside air temperature approaches 32° F (0°C)
The air conditioning system may not operate even when is pressed.

238
3-1. Using the air conditioning system and defogger
10_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.
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.

283
3-2. Using the audio system
3
Interior features
10_IS250C/350C_U
Adjusting the Automatic Sound Levelizer (ASL)
Press .
The ASL switches between on and off modes each time is
pressed.
ASL automatically adjusts the volume and tone quality according to the noise
level as you drive your vehicle.
Adjusting sound quality and volume balance ■ Changing sound quality modes
Press .
Pressing changes the sound mode in the following order:
“BAS”→ “MID”→“TRE” →“FAD”→ “BAL”
■ Adjusting sound quality
Press or to adjust the level.
*: The sound quality level is adjusted individually in each audio mode.
Mode
displayedSound qual- ity modeLevelPress ∨Press ∧
“BAS”*Bass-5 to 5
LowHigh“MID”*Mid-range-5 to 5
“TRE”*Tr e b l e-5 to 5
“FAD”
Front/rear
volume
balance
F7 to R7Shifts to rearShifts to front
“BAL”
Left/right volume
balance
L7 to R7Shifts to leftShifts to right

344
3-6. Using the storage features
10_IS250C/350C_URear
Open the front lid.
Open the rear lid.
■Cup holder insert
Front (slide type)
Rear
Remove the cup holder insert holding the
base part.
Cup holder insert may be removed for clean-
ing.
Cup holders

345
3-6. Using the storage features
3
Interior features
10_IS250C/350C_U
CAUTION
■Items unsuitable for the cup holder (front press-in type, rear)
Do not place anything other than cups or beverage cans in the cup holders. Even
when the lid is closed, items must not be stored in the cup holders.
Other items may be thrown out of the holders in the event of an accident or sudden
braking and cause injury.
■To prevent burns
Put a lid on containers with hot liquids inside.
■When not in use
Keep the cup holders closed.
Injuries may result in the event of an accident or sudden braking.
Cup holders