2017 Lexus GS450h Owner's Manual

3054-5. Using the driving support systems
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Driving
GS450h_300h_OM_OM30F92E_(EE)
■Dynamic radar cruise control with full-speed range can be set when
●The shift lever is in D or range 4 or higher of S has been selected.
●Range 4 or higher of D has been selected by using the paddle shift switch.
●Vehicle speed is above approximately 50 km/h (30 mph).
However, when a preceding vehicle is dete cted, the dynamic radar cruise control with full-speed range can be set even if the vehicle speed is at or below approximately50 km/h (30 mph).
■Accelerating after setting the vehicle speed
The vehicle can accelerate by operating the accelerator pedal. After accelerating, the set speed resumes. However, during vehicle- to-vehicle distance control mode, the vehi-
cle speed may decrease below the set speed in order to maintain the distance to the pre- ceding vehicle.
■Automatic cancelation of vehicle -to-vehicle distance control mode
Vehicle-to-vehicle distance control mode is automatically canceled in the following situ- ations.
●Actual vehicle speed falls below approximat ely 40 km/h (25 mph) when there are no
vehicles ahead.
●The preceding vehicle leaves the lane when your vehicle is following at a vehicle speed below approximately 40 km/h (25 mph). Otherwise, the sensor can not properly
detect the vehicle.
●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.
●When snow mode is set.
●The sensor cannot detect correctly because it is covered in some way.
●Pre-crash braking is activated.
●The parking brake is operated.
●The vehicle is stopped by syst em control on a steep incline.
●The following are detected when the vehicle has been stopped by system control:
• The driver is not wearing a seat belt. • The driver’s door is opened.
• The vehicle has been stopped for about 3 minutes If vehicle-to-vehicle distance control mode is automatically canceled for any other rea-son, there may be a malfunction in the syst em. Contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.

3064-5. Using the driving support systems
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■Automatic cancelation of constant speed control mode
Constant speed control mode is automatica lly canceled in the following situations:
●Actual vehicle speed is more than approximately 16 km/h (10 mph) below the set vehi-
cle speed.
●Actual vehicle speed falls 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.
●Pre-crash braking is activated.
If constant speed control mode is automatically canceled for any other reason, there may be a malfunction in the system. Contact an y authorized Lexus retailer or Lexus autho- rized repairer, or any reliable repairer.
■Warning messages and buzzers for dynamic radar cruise control with full-speed range
Warning messages and buzzers are used to indicate a system malfunction or to inform the driver of the need for caution while driv ing. If a warning message is shown on the
multi-information display, read the message and follow the instructions. (P. 466)
■When the sensor may not be correctly detecting the vehicle ahead
In the case of the following and depending on the conditions, operate the brake pedal
when deceleration of the system is insufficient or operate the accelerator pedal when acceleration is required.As the sensor may not be able to correctly detect these types of vehicles, the approach
warning ( P. 303) may not be activated.
●Vehicles that cut in suddenly
●Vehicles traveling at low speeds
●Vehicles that are not moving in the same lane
●Vehicles with small rear ends (trailers with no load on board, etc.)
●Motorcycles traveling in the same lane
●When water or snow thrown up by the surrounding vehicles hinders the detecting of the sensor

3074-5. Using the driving support systems
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Driving
GS450h_300h_OM_OM30F92E_(EE)
■Conditions under which the vehicle-to-vehicle distance control mode may not function correctly
In the case of the following conditions, operate the brake pedal (or accelerator pedal,
depending on the situation) as necessary. As the sensor may not be able to correctly detect vehicles ahead, the system may notoperate properly.
●When the vehicle ahead of you decelerates suddenly
●When your vehicle is pointing upwards(caused by a heavy load in the luggage com-partment, etc.)
●Preceding vehicle has an extremely highground clearance
●When the road curves or when the lanes arenarrow
●When steering wheel operation or your posi-tion in the lane is unstable

3084-5. Using the driving support systems
GS450h_300h_OM_OM30F92E_(EE)
Cruise control
Use the cruise control to maintain a set speed without depressing the accelera-
tor pedal.
Set speed
Indicators
Cruise control switch
Press the “ON/OFF” button to acti-
vate 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.
Cruise control “SET” indicator will come on.The vehicle speed at the moment the
lever is released becomes the set speed.
: If equipped
Summary of functions
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Setting the vehicle speed
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3094-5. Using the driving support systems
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Driving
GS450h_300h_OM_OM30F92E_(EE)
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 1.6 km/h (1 mph) each time the lever is operated.
Large adjustment: The set spee d can be increased or decreased continually until the lever is released.
Pulling the lever toward you cancels
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 vehicle
speed is more than approximately 40 km/h (25 mph).
■Cruise control can be set when
●The shift lever is in D or range 4 or higher of S has been selected.
●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 accel- erating the vehicle to the desired speed and then pushing the lever down to set the newspeed.
Adjusting the set speed
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2
Canceling and resuming the constant speed control
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2

3104-5. Using the driving support systems
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■Automatic cruise control cancelation
Cruise control will stop maintaining the vehicl e 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-information 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 immediately after being activated, there may be a malfunction in the cruise control system. Have the vehi-cle inspected by any authorized Lexus retaile r or Lexus authorized repairer, or any reli-
able repairer.
WARNING
■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 orserious 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 hillsVehicle speed may exceed the set sp eed when driving down a steep hill.
●When your vehicle is towing a trailer or during emergency towing

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4-5. Using the driving support systems
Driving
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Driving mode select switch
Vehicles without Adaptive Variable Suspension system
Normal mode
For normal driving.
Press the switch to change the driving mode to normal mode when Eco drive mode or
sport mode is selected.
Eco drive mode
Use Eco drive mode to help achieve low fuel consumption during trips that
involve frequent accelerating.
When not in Eco drive mode and the driving mode select switch is turned to the left, the “ECO” or “ECO MODE” indicator come s on in the multi-information display.
Sport mode
Assists acceleration response by controlling the hybrid system and steering.
Suitable for when precise handling is desirable, for example when driving on
mountain roads.
When not in Sport mode and the driving mode select switch is turned to the right, the
“SPORT” indicator comes on in the multi-information display, and the Hybrid System Indicator changes to the tachometer. ( P. 109)
The driving modes can be selected to suit driving condition.
Except
F SPORT models F SPORT models
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3124-5. Using the driving support systems
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Vehicles with Adaptive Variable Suspension system
Normal mode/Customized mode
Normal mode and customized mode are selected by pressing the driving
mode select switch. Each time the switch is pressed, the driving mode
changes between normal mode and customized mode. When customized
mode is selected, the “Customize” or “CUSTOMIZE” indicator will be illumi-
nated.
Press the switch to change the driving mode to normal mode when Eco drive mode or sport mode is selected.•Normal mode
For normal driving. • Customized modeAllows you to drive with the power train, chassis and air conditioning system func-
tions set to your preferred settings. Customized mode settings can only be changed on the drive mode customization display of the Remote Touch screen. ( P. 570)
Eco drive mode
Use Eco drive mode to help achieve low fuel consumption during trips that
involve frequent accelerating.
When not in Eco drive mode and the driving mode select switch is turned to the left,
the “ECO” or “ECO MODE” indicator come s on in the multi-information display.
Except
F SPORT models F SPORT models
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2