light Lexus GS250 2012 Repair Manual

2264-2. Driving procedures
GS350/250_EE (OM30C36E)The parking brake is set or released automatically according to shift
lever operation.
Turns automatic mode on/off
When the shift lever is moved
out of P, the parking brake will
be released.
When the shift lever is moved
into P, the parking brake will
be set.
Operate the shift lever with the
brake pedal depressed.
Parking brake operation
When the engine switch is not in IGNITION ON mode, the parking brake
cannot be released using the parking brake switch.
When the engine switch is not in IGNITION ON mode, automatic mode
(automatic brake setting and releasing) is not available.
If the parking brake is operated repeatedly over a short period of time, the
system may restrict operation to prevent overheating. If this happens,
refrain from operating the parking brake. Normal operation will return after
about 1 minute.
Parking brake operation sound
When the parking brake operates, a motor sound (whirring sound) may be
heard. This does not indicate a malfunction.
Parking brake indicator light
Depending on the engine switch mode, the parking brake indicator light
will come on and stay on as described below:
IGNITION ON mode: Comes on until the parking brake is released.
Not in IGNITION ON mode: Stays on for approximately 15 seconds.
When the engine switch is turned off with the parking brake set, the parking
brake indicator light will stay on for about 15 seconds. This does not indi-
cate a malfunction.
Automatic mode

227
4 4-2. Driving procedures
Driving
GS350/250_EE (OM30C36E)
When there is a malfunction in the system
Warning lights and/or warning message will turn on or flash. (P. 749, 757)
Depending on the condition, the parking brake indicator light may flash.
Usage in winter time
P. 3 5 9
NOTICE
When parking the vehicle
Before you leave the vehicle, set the parking brake, shift the shift lever to P
and make sure that the vehicle does not move.
When the system malfunctions
Stop the vehicle in a safe place and check the warning messages.
When the parking brake cannot be released due to a malfunction
Use the parking brake release tool to manually release the parking brake.
(P. 818)
Driving the vehicle with the parking brake set will lead to brake compo-
nents overheating, which may affect braking performance and increase
brake wear.

2284-3. Operating the lights and wipers
GS350/250_EE (OM30C36E)
Headlight switch
Turning the end of the lever turns on the lights as follows:
The front position, tail,
license plate and instru-
ment panel lights turn on.
The headlights and all
lights listed above turn
on.
The headlights, daytime
running lights and all the
lights listed above turn on
and off automatically.
(When the engine switch
is in IGNITION ON
mode.)
The daytime running
lights turn on.
The headlights can be operated manually or automatically.
Operating instructions
1
2
3
4

2294-3. Operating the lights and wipers
4
Driving
GS350/250_EE (OM30C36E)With the headlights on, push
the lever away from you to
turn on the high beams.
Pull the lever toward you to the
center position to turn the high
beams off.
Pull the lever toward you and
release it to flash the high
beams once.
You can flash the high beams with
the headlights on or off.
This system allows the headlights and front position lights to be
turned on for 30 seconds when the engine switch is off.
Pull the lever toward you and
release it with the light switch is
in or after turning the
engine switch off.
Pull the lever toward you and
release it again to turn off the
lights.
Turning on the high beam headlights
1
2
Follow me home system

2304-3. Operating the lights and wipers
GS350/250_EE (OM30C36E)AFS (Adaptive Front-lighting System) secures excellent visibility
at intersections and on curves by automatically adjusting the direc-
tion of the light axis of the headlights according to vehicle speed
and the degree of the tire’s angle as controlled by steering input.
AFS operates at speeds of 10 km/h (6 mph) or higher.
Deactivating AFS
Turn on the AFS OFF switch.
The indicator turns on when the
AFS is deactivated.
AFS (Adaptive Front-lighting System) (if equipped)

2314-3. Operating the lights and wipers
4
Driving
GS350/250_EE (OM30C36E)
Daytime running light system
To make your vehicle more visible to other drivers, the front position lights
turn on automatically whenever the engine is started and the parking brake is
released. Daytime running lights are not designed for use at night.
Headlight control sensor
Automatic light off system
When the light switch is in : The headlights turn off automatically if the
engine switch is turned to ACCESSORY mode or turned off.
When the light switch is in : The headlights and all lights turn off auto-
matically if the engine switch is turned to ACCESSORY mode or turned
off.
To turn the lights on again, turn the engine switch to IGNITION ON mode,
or turn the light switch off once and then back to or .
If any of the doors or trunk lid is kept open, the lights automatically turn off
after 20 minutes.
Light reminder buzzer
A buzzer sounds when the engine switch is turned off or turned to ACCES-
SORY mode and the driver’s door is opened while the lights are turned on.
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. The sensor may not function properly if
an object is placed on the sensor, or any-
thing that blocks the sensor is affixed to
the windshield.
Doing so interferes with the sensor
detecting the level of ambient light and
may cause the automatic headlight system
to malfunction.

2324-3. Operating the lights and wipers
GS350/250_EE (OM30C36E)
If the “AFS OFF” indicator flashes
It may indicate a malfunction in the system. Contact any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
Customization
Settings (e.g. light sensor sensitivity) can be changed.
(Customizable features: P. 862)
NOTICE
To prevent battery discharge
Do not leave the lights on longer than necessary when the engine is not run-
ning.

233
4 4-3. Operating the lights and wipers
Driving
GS350/250_EE (OM30C36E)
Automatic High Beam
Push the lever away from you
with the headlight switch in
or position.
Press the Automatic High
Beam switch.
The Automatic High Beam indica-
tor will come on when the head-
lights are turned on automatically
to indicate that the system is
active.
: If equipped
The Automatic High Beam uses an in-vehicle camera sensor to
assess the brightness of streetlights, the lights of oncoming and
preceding vehicles, etc., and automatically turns high beam on or
off as necessary.
Activating the Automatic High Beam system
1
2

2344-3. Operating the lights and wipers
GS350/250_EE (OM30C36E)When all of the following conditions are fulfilled, high beam will
be automatically turned on (after approximately 1 second):
Vehicle speed is above approximately 40 km/h (25 mph).
The area ahead of the vehicle is dark.
There are no oncoming or preceding vehicles with headlights or
tail lights turned on.
There are few streetlights on the road ahead.
If any of the following conditions are fulfilled, high beam will be
automatically turned off:
Vehicle speed drops below approximately 30 km/h (19 mph).
The area ahead of the vehicle is not dark.
Oncoming or preceding vehicles have headlights or tail lights
turned on.
There are many streetlights on the road ahead.
High beam automatic turning on or off conditions

2354-3. Operating the lights and wipers
4
Driving
GS350/250_EE (OM30C36E)
Switching to low beam
Pull the lever to original posi-
tion.
The Automatic High Beam indi-
cator will turn off.
Push the lever away from you to
activate the Automatic High
Beam system again.
Switching to high beam
Press the Automatic High
Beam switch.
The Automatic High Beam indi-
cator will turn off and the high
beam indicator will turn on.
Press the switch to activate the
Automatic High Beam system
again.
Turning the high beam on/off manually