light Lexus GS350 2008 Opening, closing and locking the doors and trunk / LEXUS 2008 GS460/350 (OM30A87U) Workshop Manual

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2-3. Operating the lights and windshield wipers
2
When driving
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June 5, 2008 10:37 am
AFS (Adaptive Front lighting System) (if equipped)
AFS improves visibility at intersectio ns and on curves by automatically
adjusting the level of the headlights according to vehicle speed and the
degree of the tire angle that are controlled by steering input.
Operates at speeds of 6 mph (10 km/h) or higher.
■ Deactivating AFS
Press the switch to turn it off.
The indicator 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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2-3. Operating the lights and windshield wipers
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■Automatic light off system
The headlights and tail lights turn off 30 seconds after all doors are closed if the
“ENGINE START STOP” switch has been switched to ACCESSORY mode or
turned OFF while the headlights are turned on. (The lights turn off immediately if
the button on the key is pressed after all doors are locked.)
To turn the lights on again, switch to IG NITION ON mode, or turn the light switch
off once and then back to the or position.
■Automatic headlight leveling system
The level of the headlights is automatica lly 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 the indicator 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. 5 7 2 )
NOTICE
■To prevent 12 volt battery discharge
Do not leave the lights on longer than necessary when the engine is off.

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2-3. Operating the lights and windshield wipers
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When driving
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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.
OFF
ON

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2-3. Operating the lights and windshield wipers
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Windshield wipers and washer
■Intermittent wiper with interval adjuster
Wiper intervals can be adjusted for intermittent operation (when
is selected).
Decreases the intermittent
windshield wiper frequency
Increases the intermittent
windshield wiper frequency
Intermittent wiper operation
Low speed wiper operation
High speed wiper operation
Temporary operation
Wash/wipe operation
■ Rain-sensing windshield wipers
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 and vehicle speed.
Sensor sensitivity (low)
Sensor sensitivity (high)
Rain-sensing wiper operation
Low speed wiper operation
High speed wiper operation
Temporary operation
Wash/wipe operation

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2-3. Operating the lights and windshield wipers
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When driving
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■The windshield wiper and washer can be operated when
The “ENGINE START STOP” switch is in IGNITION ON mode.
■Dripping prevention wiper sweep
After washing and wiping operation severa l times, the wipers operate one more
time after a short delay to prevent dripping.
However, the last sweep will not happen if the vehicle is traveling above 106 mph
(170 km/h).
■Effects of vehicle speed on wiper operation
Vehicle speed affects the following even when the wipers are not “AUTO” mode.
●Intermittent wiper interval ( mode)
●Wiper operation when the washer is bein g used (delay until drip prevention
wiper sweep occurs)
With selected, wiper operation will be switched from low speed to intermit-
tent wiper operation only when the vehicle is stationary.
■Rain drop sensor (vehicles equipped with rain-sensing windshield wipers)
The sensor judges the amount of raindrops.

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2-3. Operating the lights and windshield wipers
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■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.
■In extremely hot or cold weather
The system will turn off if the windshield gets extremely hot (at more than 176F
[80 C]) or cold (at less than 14 F [-10C]).
■Customization that can be configured at Lexus dealer
Settings (e.g. drip prevention function) can be changed. 
(Customizable features P. 5 7 3 )
CAUTION
■Caution regarding the use of windshield wipers in “AUTO” mode
The windshield wipers may operate unexpect edly 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.

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2-3. Operating the lights and windshield wipers
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When driving
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Headlight cleaner switch (if equipped)
■The headlight cleaner can be operated when
The “ENGINE START STOP” switch is in IGNITION ON mode and the headlight
switch is turned ON.
NOTICE
■When the washer fluid tank is empty
Do not use this function, as the washer fluid pump may overheat.
Washer fluid can be sprayed on the headlights.
Press the switch to clean the
headlights.

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2-4. Using other driving systems
Cruise control
Use the cruise control to maintain a set speed without using the accelera-
tor.
■ Set the vehicle speed
Press the “ON-OFF” button to
activate the cruise control.
Press 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.
■ 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 press-
ing the lever up or down and
releasing it.
STEP1
STEP2

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2-4. Using other driving systems
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■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 malfun ction 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 slippery roads, such as thos e covered with rain, ice or snow
●On steep hills
Vehicle speed may exceed the set speed when driving down a steep hill.
●On winding roads

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2-4. Using other driving systems
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■Selecting conventional constant speed control mode
Press the “ON-OFF” button
to activate the cruise control.
Press the button once more to
deactivate the cruise control.
Switch to constant speed
control mode.
(Push the lever away from
you and hold for approxi-
mately 1 second.)
Vehicle-to-vehicle distance con-
trol mode is always reset when
the “ENGINE START STOP”
switch is switched to IGNITION
ON mode.
■ Adjusting the speed setting
Increase speed
Decrease speed
Hold the lever until the desired
speed setting is displayed.
In the constant speed control
mode, 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.