2013 Lexus GS350 brake

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GS350_U (OM30C34U)
4-2. Driving procedures
Pa rk in g b ra ke
Sets the parking brake
The parking brake indicator light will
come on. (→P. 1 8 7 )
Press and hold the parking brake
switch if an emergency occurs and it is
necessary to operate the parking
brake while driving.
Releases the parking brake
Operate the parking brake switch
while depressing the brake pedal.
Make sure that the parking brake indi-
cator light goes off.
A selections can be made as desired from the following modes.
Manual mode
U.S.A. Canada
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GS350_U (OM30C34U)
1874-2. Driving procedures
4
Driving
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 (auto-
matic 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 operat-
ing 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 indicate a malfunc-
tion.
Automatic mode

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GS350_U (OM30C34U)
4-2. Driving procedures
■When there is a malfunction in the system
Warning lights and/or warning message will turn on or flash. (→P. 688, 701)
Depending on the condition, the parking brake indicator light may flash.
■Usage in winter time
→ P. 299
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. 7 3 8 )
Driving the vehicle with the parking brake set will lead to brake components over-
heating, which may affect braking performance and increase brake wear.

GS350_U (OM30C34U)
1934-3. Operating the lights and wipers
4
Driving
■Daytime running light system
●To make your vehicle more visible to other drivers, the parking lights turn on auto-
matically (at an increased intensity) whenever the engine is started and the parking
brake is released. Daytime running lights are not designed for use at night.
●Compared to turning on the headlights, the daytime running light system offers
greater durability and consumes less electricity, so it can help improve fuel econ-
omy.
■Headlight control sensor
■Automatic light off system
When the light switch is in : The headlights and tail lights turn off 30 seconds
after the engine switch is turned to ACCESSORY mode or turned off and a door is
opened and all of the doors and trunk are closed. (The lights turn off immediately if on the key is pressed twice after all the doors are closed.)
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 ACCESSORY
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 pas-
sengers and the loading condition of the vehi cle 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 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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GS350_U (OM30C34U)
4-5. Using the driving support systems
To change the set speed, operate the lever until the desired set speed is
obtained.Increases the speed
Decreases the speed
Fine adjustment: Momentarily move
the lever in the desired direction.
Large adjustment: Hold the lever in
the desired direction.
The set speed will be increased or decreased as follows:
Fine adjustment: By approximately 1 mph (1.6 km/h) each time the lever is oper-
ated.
Large adjustment: The set speed can be increased or decreased continually until
the lever is released.
Pulling the lever toward you can-
cels the constant speed control.
The speed setting is also canceled
when the brakes are applied.
Pushing the lever up resumes the
constant speed control.
Resuming is available when the vehi-
cle speed is more than approximately
25 mph (40 km/h).
Adjusting the set speed
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Canceling and resuming the constant speed control
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GS350_U (OM30C34U)
2174-5. Using the driving support systems
4
Driving
Pulling the lever toward you can-
cels the cruise control.
The speed setting is also canceled
when the brakes are applied.
Pushing the lever up resumes the
cruise control and returns vehicle
speed to the set speed.
Resuming is available when the vehi-
cle speed is more than approximately
25 mph (40 km/h).
Canceling and resuming the speed control
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GS350_U (OM30C34U)
4-5. Using the driving support systems
This mode employs a radar sensor to detect the presence of vehicles up to
approximately 400 ft. (120 m) ahead, determines the current vehicle-to-
vehicle following distance, and operates to maintain a suitable following
distance from the vehicle ahead.
Note that vehicle-to-vehicle distance will close in when traveling on long downhill
slopes.
Example of constant speed cruising
When there are no vehicles ahead
The vehicle travels at the speed set by the driver. The desired vehicle-to-vehicle
distance can also be set by operating the vehicle-to-vehicle distance control.
Example of deceleration cruising
When the vehicle ahead is driving slower than the set speed
When a vehicle is detected running ahead of you, the system automatically decel-
erates your vehicle. When a greater reduction in vehicle speed is necessary, the
system applies the brakes. A warning tone warns you when the system cannot
decelerate sufficiently to prevent your vehicle from closing in on the vehicle
ahead.
Driving in vehicle-to-vehicle distance control mode
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GS350_U (OM30C34U)
2194-5. Using the driving support systems
4
Driving
Example of follow-up cruising
When following a vehicle driving slower than the set speed
The system continues follow-up cruising while adjusting for changes in the speed
of the vehicle ahead in order to maintain the vehicle-to-vehicle distance set by the
driver.
Example of acceleration
When there are no longer any vehicles ahead driving slower than the
set speed
The system accelerates until the set speed is reached. The system then returns to
constant speed cruising.
When your vehicle is too close to a vehicle ahead, and sufficient auto-
matic deceleration via the cruise control is not possible, the display will
flash and the buzzer will sound to alert the driver. An example of this
would be if another driver cuts in front of you while you are following a
vehicle. Apply the brakes to ensure an appropriate vehicle-to-vehicle dis-
tance.
■Warnings may not occur when
In the following instances, there is a possibility that the warnings will not
occur:
●When the speed of the vehicle ahead matches or exceeds your vehi-
cle speed
●When the vehicle ahead is traveling at an extremely slow speed
●Immediately after the cruise control speed was set
●At the instant the accelerator is applied
Ap proach warni ng
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