2012 Lexus GS350 cruise control

2544-5. Using the driving support
GS350/250_EE (OM30C36E)
Cruise control
Use the cruise control to maintain a set speed without depressing
the accelerator pedal.
Indicators
Cruise control switch
Press the “ON-OFF” button to
activate the cruise control.
Cruise control indicator will come
on.
Press the button again to deactivate
the cruise control.
Accelerate or decelerate the
vehicle to the desired speed,
and push the lever down to set
the speed.
“SET” indicator will come on.
The vehicle speed at the moment
the lever is released becomes the
set speed.
: If equipped
Summary of functions
1
2
Setting the vehicle speed
1
2

2564-5. Using the driving support
GS350/250_EE (OM30C36E)
Cruise control can be set when
The shift lever is in D.
Range 4 or higher of D has been selected by using the paddle shift.
Vehicle speed is above approximately 40 km/h (25 mph).
Accelerating after setting the vehicle speed
The vehicle can be accelerated normally. After acceleration, the set speed
resumes.
Even without canceling the cruise control, the set speed can be increased by
first accelerating the vehicle to the desired speed and then pushing the lever
down to set the new speed.
Automatic cruise control cancelation
Cruise control will stop maintaining the vehicle speed in any of the following
situations.
Actual vehicle speed falls more than approximately 16 km/h (10 mph)
below the preset vehicle speed.
At this time, the memorized set speed is not retained.
Actual vehicle speed is below approximately 40 km/h (25 mph).
VSC is activated.
TRC is activated for a period of time.
When the VSC or TRC system is turned off by pressing the VSC OFF
switch.
If the warning message for the cruise control is shown on the multi-informa-
tion display
Press the “ON-OFF” button once to deactivate the system, and then press the
button again to reactivate the system.
If the cruise control speed cannot be set or if the cruise control cancels imme-
diately after being activated, there may be a malfunction in the cruise control
system. Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.

2574-5. Using the driving support
4
Driving
GS350/250_EE (OM30C36E)
CAUTION
To avoid operating the cruise control by mistake
Switch the cruise control off using the “ON-OFF” button 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 loss of control and could cause an accident resulting
in death or serious injury.
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
Vehicle speed may exceed the set speed when driving down a steep hill.
When your vehicle is towing a trailer or during emergency towing

2584-5. Using the driving support
GS350/250_EE (OM30C36E)
Dynamic radar cruise control
Dynamic radar cruise control supplements conventional cruise con-
trol with a vehicle-to-vehicle distance control. In vehicle-to-vehicle
distance control mode, the vehicle automatically accelerates or
decelerates in order to maintain a set following distance from vehi-
cles ahead.
Vehicle-to-vehicle distance
button
Display
Set speed
Indicators
Cruise control switch

: If equipped
Summary of functions
1
2
3
4
5

2594-5. Using the driving support
4
Driving
GS350/250_EE (OM30C36E)Press the “ON-OFF” button to
activate the cruise control.
Radar cruise control indicator will
come on.
Press the button again to deactivate
the cruise control.
Accelerate or decelerate the
vehicle to the desired speed,
and push the lever down to set
the speed.
“SET” indicator will be displayed.
The vehicle speed at the moment
the lever is released becomes the
set speed.
Setting the vehicle speed (vehicle-to-vehicle distance control
mode)
1
2

2624-5. Using the driving support
GS350/250_EE (OM30C36E)Pulling the lever toward you
cancels 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
vehicle speed is more than approx-
imately 40 km/h (25 mph).
Canceling and resuming the speed control
1
2

2644-5. Using the driving support
GS350/250_EE (OM30C36E)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
automatic deceleration via the cruise control is not possible, the dis-
play 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 appro-
priate vehicle-to-vehicle distance.
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
vehicle 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
Approach warning
3
4

2654-5. Using the driving support
4
Driving
GS350/250_EE (OM30C36E)When constant speed control mode is selected, your vehicle will
maintain a set speed without controlling the vehicle-to-vehicle dis-
tance. Select this mode only when vehicle-to-vehicle distance con-
trol mode does not function correctly due to dirt etc.
Press the “ON-OFF” button to
activate the cruise control.
Press the button again to deactivate
the cruise control.
Switch to constant speed con-
trol mode.
(Push the lever forward and
hold for approximately one
second.)
Constant speed control mode indi-
cator will come on.
When in constant speed control
mode, to return to vehicle-to-vehi-
cle distance control mode, push the
lever forward again and hold for
approximately 1 second.
After the desired speed has been
set, it is not possible to return to
vehicle-to-vehicle distance control
mode.
If the engine switch is turned off
and then turned to IGNITION ON
mode again, the vehicle will auto-
matically return to vehicle-to-vehi-
cle distance control mode.
Selecting conventional constant speed control mode
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2