140 Lexus IS F 2008 Audio/video System / LEXUS 2008 IS F OWNER'S MANUAL (OM53714U)

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2-1. Driving procedures
2
When driving
CAUTION
●Do not turn the engine off while driving.
The power steering and brake booster systems will not operate properly if the
engine is not running.
●Use engine braking (downshift) to maintain a safe speed when driving down a
steep hill.
Using the brakes continuously may cause the brakes to overheat and lose effec-
tiveness. (P. 120, 122)
●When stopped on an inclined surface, use the brake pedal and parking brake to
prevent the vehicle from rolling backward or forward and causing an accident.
●Do not adjust the position of the steering wheel, the seat, or the inside or outside
rear view mirrors while driving.
Doing so may result in a loss of vehicle control that can cause accidents that may
result in death or serious injury.
●Always check that all passengers' arms, heads or other parts of their bodies are
not outside the vehicle, as this may result in death or serious injury.
●Do not drive in excess of the speed limit. Even if the legal speed limit permits it, do
not drive over 85 mph (140 km/h) unless your vehicle has high-speed capability
tires. Driving over 85 mph (140 km/h) may result in tire failure, loss of control and
possible injury. Be sure to consult a tire dealer to determine whether the tires on
your vehicle are high-speed capability tires or not before driving at such speeds.
■When driving on slippery road surfaces
●Sudden braking, acceleration and steering may cause tire slippage and reduce
your ability to control the vehi cle, resulting in an accident.
●Sudden changes in engine speed, such as engine braking caused by up-shifting
or down-shifting, may cause the vehicl e to skid, resulting in an accident.
●After driving through a puddle, lightly depress the brake pedal to make sure that
the brakes are functioning properly. Wet brake pads may prevent the brakes from
functioning properly. If the brakes on on ly one side are wet and not functioning
properly, steering control may be af fected, resulting in an accident.
■When shifting the shift lever
Be careful not to shift the shift lever with the accelerator pedal depressed.
This may lead to unexpected rapid acceleration of the vehicle that may cause an
accident and result in death or serious injury.

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2-3. Operating the lights and windshield wipers
AFS (Adaptive Front—lighting System)AFS (Adaptive Front—lighting System) improves visibility at intersections
and on curves by automatically adjusting the level of the headlights
according to vehicle speed and the degree of the tire angle that are con-
trolled by steering input.
Operates at speeds of 6 mph (10 km/h) or higher.
■ Deactivating AFS
How to switch: P. 2 3 6
turns on when the AFS is deactivated.
■Daytime running light system
To make your vehicle more visible to other drivers, the headlights turn on automati-
cally (at a reduced intensity) whenever the engine is started and the parking brake
is released. Daytime running lights are not designed for use at night.
■Headlight control sensor
The sensor may not function properly if an
object is placed on the sensor, or anything
that blocks the sensor is affixed to the wind-
shield.
Doing so interferes with the sensor detecting
the level of ambient light and may cause the
automatic headlight system to malfunction.

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2-5. Driving information
Cargo and luggage
Capacity and distributionCargo capacity depends on the to tal weight of the occupants.
(Cargo capacity) = (Total load capa city) — (Total weight of occupants)
Steps for Determining Correct Load Limit 
(1) Locate the statement “The combined weight of occupants and cargo should never exceed XXX kg or XXX lbs.” on your vehicle’s placard.
(2) Determine the combined weight of th e driver and passengers that will
be riding in your vehicle.
(3)Subtract the combined weight of the driver and passengers from
XXX kg or XXX lbs.
(4)The resulting figure equals the av ailable amount of cargo and luggage
load capacity.
For example, if the “XXX” amount equals 1400 lbs. and there will be
five 150 lb passengers in your vehicle, the amount of available cargo
and luggage load capacity is 650 lbs. (1400  750 (5150) = 650
lbs.)
(5)Determine the combined weight of luggage and cargo being loaded
on the vehicle. That weight may no t safely exceed the available cargo
and luggage load capacity calculated in Step 4.
Take notice of the following information about storage precautions, cargo
capacity and load.
● Stow cargo and luggage in the tru nk whenever possible. Be sure
all items are secured in place.
● Be careful to keep the vehicle level. Placing the weight as far for-
ward as possible helps maintain vehicle balance.
● For better fuel economy, do not carry unnecessary weight.

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4-3. Do-it-yourself maintenance
25FA N 140 AElectric cooling fans
26HEATER50 ACDS, air conditioning system
27E/G-AM60 AH-LP CLN, FR CTRL-AM
FuseAmpereCircuit

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Alphabetical index
Alphabetical index
A/C ............................................................. 186
ABS.............................................................. 166
ACCESSORY mode ............................ 114
AFS .............................................................. 140
Adaptive front lighting system ......... 140
Air conditioning filter ........................... 313
Air conditioning systemAir conditioning filter .........................313
Automatic air conditioning system ................................................... 186
Airbags Airbag operating conditions........... 79
Airbag precautions for your child.......................................................... 83
Airbag warning light ..........................351
Curtain shield airbag operating conditions..............................................80
Curtain shield airbag precautions .......................................... 83
Front passenger occupant classification system.........................88
General airbag precautions ........... 83
Locations of airbags............................. 77
Modification and disposal of airbags .................................................... 87
Proper driving po sture ............. 75, 83
Side airbag operating conditions..............................................80
Side airbag precautions .................... 83
SRS airbags .............................................. 77 Alarm .............................................................72
Antenna .................................................... 202
Anti-lock brake system ........................166
Armrest .................................................... 246
Ashtrays.................................................... 239
Audio input.............................................. 220
Audio system
Antenna.................................................. 202
Audio input ........................................... 220
Audio visual input.............................. 220
AUX adapter ...................................... 220
CD player/changer ......................... 205
MP3/WMA disc................................... 211
Optimal use ............................................217
Portable music player ..................... 220
Radio .........................................................198
Steering wheel audio switch...........221
Audio visual input ................................. 220
Automatic air conditioning system ..................................................... 186
Automatic headlight leveling system ....................................................... 141
Automatic light control system.........139
Automatic transmission Automatic transmission .....................118
If the shift lever cannot be shifted from P................................... 384
M mode ....................................................122
AUX adapter ......................................... 220A

440
Alphabetical index
Child-protectors ......................................38
Cigarette lighter....................................240
CleaningExterior ................................................... 264
Interior ..................................................... 267
Seat belts................................................268
Clock .........................................................235
Coat hooks .............................................. 249
Compass ..................................................259
Condenser ..............................................290
Console box ...........................................228
Cooling system Engine overheating .......................... 392
Cornering assist sensors .................... 160
Cruise control Cruise control ....................................... 147
Dynamic radar cruise control ...... 150
Cup holders ............................................230
Curtain shield airbags............................ 77
Customizable features ....................... 424 Daytime running light system ........... 140
Defogger
Rear window ......................................... 194
Side mirrors............................................ 194
Dimension ............................................... 398
Dinghy towing......................................... 183
Display Dynamic radar cruise control .......150
Satellite switch mode........................236
Trip information.................................... 136
Warning message ............................ 360
Do-it-yourself maintenance ............. 276
Door courtesy lights Door courtesy lights .........................223
Wattage ................................................. 408
Door pockets ......................................... 232
Doors Door glasses............................................ 62
Door lock .................................22, 34, 37
Side mirrors............................................. 60
Driver's seat belt reminder light ..... 353
Driving Correct posture..................................... 75
Procedures.............................................106
Driving position memory...................... 45D