Lexus IS F 2008 Owner's Manual

140
2-3. Operating the lights and windshield wipers
08_IS F_U_(L/O_0711)
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.

141
2-3. Operating the lights and windshield wipers
2
When driving
08_IS F_U_(L/O_0711)
■Automatic light off system
●When the headlights come on: The headlights and tail lights turn off 30 seconds
after a door is opened and closed if the “ENGINE START STOP” switch has
been switched to ACCESSORY mode or turned OFF. (The lights turn off
immediately if on the key is pressed after all doors are locked.)
●When only the tail lights come on: The tail lights turn off automatically if the
“ENGINE START STOP” switch is switched to ACCESSORY mode or turned
OFF and driver’s door is opened.
To turn the lights on again, switch to IGNITION ON mode, or turn the light switch
off once and then back to or .
■Automatic headlight leveling system
The level of the headlights is automatically adjusted according to the number of
passengers and the loading condition of the vehicle to ensure that the headlights do
not interfere with other road users.
■If flashes...
It may indicate a malfunction in the system. Contact your Lexus dealer.
■Customization that can be configured at Lexus dealer
Settings (e.g. light sensor sensitivity) can be changed.
(Customizable features →P. 4 2 4 )
NOTICE
■To prevent battery discharge
Do not leave the lights on longer than necessary when the engine is not running.

142
2-3. Operating the lights and windshield wipers
08_IS F_U_(L/O_0711)
Fog light switch
The fog lights improve visibility in difficult driving conditions, such as in rain
or fog. They can be turned on only when the headlights are on low beam.
Front fog lights off
Front fog lights on

143
2-3. Operating the lights and windshield wipers
2
When driving
08_IS F_U_(L/O_0711)
Windshield wipers and washer
With “AUTO” selected, the wipers will operate automatically when the
sensor detects falling rain. The system automatically adjusts wiper timing in
accordance with rain volume.
Rain-sensing wiper operation
Low speed wiper operation
High speed wiper operation
Temporary operation
Wash/wipe operation
Wipers operate automatically.
(After operating several times,
the wipers operate one more
time after a short delay to pre-
vent dripping.)
Vehicles with headlight cleaner:
If the headlights are on, the
headlight cleaner will operate
once.

144
2-3. Operating the lights and windshield wipers
08_IS F_U_(L/O_0711)
■The windshield wiper and washer can be operated when
The “ENGINE START STOP” switch is in IGNITION ON mode.
■Effects of vehicle speed on wiper operation
With the settings other than “AUTO” also, the time until drip prevention wiper
sweep occurs is changed depending on vehicle speed.
With “LO” selected, wiper operation will be switched from low speed to intermit-
tent wiper operation only when the vehicle is stationary.
■“A U T O ” m o d e
■Outside rear view mirror defogger activation linked to windshield wiper opera-
tion
The outside rear view mirror defogger automatically turns on when you operate the
windshield wipers.
■If no windshield washer fluid sprays
Check that the washer nozzles are not blocked if there is washer fluid in the wind-
shield washer fluid reservoir.
■Customization that can be configured at Lexus dealer
Settings (e.g. drip prevention function) can be changed.
(Customizable features →P. 4 2 4 ) The raindrop sensor judges the amount of
raindrops.
The sensitivity of sensor can be adjusted by
turning the knob.
Decreases the sensitivity (-)
Increases the sensitivity (+)

145
2-3. Operating the lights and windshield wipers
2
When driving
08_IS F_U_(L/O_0711)
CAUTION
■Caution regarding the use of windshield wipers in “AUTO” mode
The windshield wipers may operate unexpectedly if the sensor is touched or the
windshield is subject to vibration in “AUTO” mode. Take care that your fingers or
anything else do not become caught in the windshield wipers.
NOTICE
■When the windshield is dry
Do not use the wipers, as they may damage the windshield.
■When there is no washer fluid spray from the nozzle
Damage to the washer fluid pump may be caused if the lever is pulled toward you
and held continually.

146
2-3. Operating the lights and windshield wipers
08_IS F_U_(L/O_0711)
Headlight cleaner switch (if equipped)
■The headlight cleaner can be operated when
When the “ENGINE START STOP” switch is in IGNITION ON mode and the
headlight switch is turned on.
■Windshield washer linked operation
When the windshield washer is operated with the “ENGINE START STOP” switch
in IGNITION ON mode and the headlights on, the headlight cleaner will operate
once. (→P. 1 4 3 )
NOTICE
■When the washer fluid tank is empty
Do not use this function when the washer fluid tank is empty. This may cause the
washer fluid pump to overheat.
Washer fluid can be sprayed on the headlights.
Press the switch to clean the
headlights.

147
2
When driving
08_IS F_U_(L/O_0711)
2-4. Using other driving systems
Cruise control (if equipped)
Use the cruise control to maintain a set speed without using the accelera-
tor.
■ Set the vehicle speed
Turn the “ON-OFF” button on.
Push the button once more to
deactivate the cruise control.
Accelerate or decelerate to the
desired speed and press the
lever down to set the cruise
control speed.
STEP1
STEP2

148
2-4. Using other driving systems
08_IS F_U_(L/O_0711)
■Cruise control can be set when
●The shift lever is in the D position. However, it cannot be set if any of the ranges 1
through 3 has been selected using the paddle shift switches.
●Vehicle speed is between approximately 25 mph (40 km/h) and 125 mph
(200 km/h).
■Adjusting the speed setting
Increase speed
Decrease speed
Hold the lever until the desired
speed setting is obtained.
Fine adjustment of the set
speed (approximately 1.0 mph
[1.6 km/h]) can be made by
lightly pressing the lever up or
down and releasing it.
■Canceling and resuming regular acceleration
Cancel
Push the lever towards you to
cancel cruise control.
The speed setting is also can-
celed when the brakes are
applied.
Resume
To resume cruise control and
return to the set speed, push the
lever up.

149
2-4. Using other driving systems
2
When driving
08_IS F_U_(L/O_0711)
■Accelerating
The vehicle can be accelerated normally.
■Automatic cruise control cancellation
The set speed is automatically cancelled in any of the following situations.
●Actual vehicle speed falls more than 10 mph (16 km/h) below the preset vehicle
speed
At this time, the memorized set speed is not retained.
●Actual vehicle speed is below 25 mph (40km/h)
●VSC is activated
●The shift lever is shifted to the M position.
●When the shift lever is in the D position and any of the ranges 1 through 3 is
selected using the “-” paddle shift switch.
■If the cruise control indicator light flashes
Turn the “ON-OFF” button off once, and then reactivate the system.
If the cruise control speed cannot be set or if the cruise control cancels immediately
after being activated, there may be a malfunction in the cruise control system. Have
the vehicle inspected by your Lexus dealer.
CAUTION
■To avoid operating the cruise control by mistake
Keep the “ON-OFF” button off when not in use.
■Situations unsuitable for cruise control
Do not use cruise control in any of the following situations.
Doing so may result in control of the vehicle being lost and could cause serious or
fatal accident.
●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 hills