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4-5. Using the driving support systems
Dynamic radar cruise control with full-speed range can be set when
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The shift lever is in D.
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Vehicle speed is above approximately 30 mph (50 km/h).
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Accelerating after setting the vehicle speed
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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
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Vehicle-to-vehicle distance control mode is automatically canceled in the following situ-
ations. "Radar Cruise Control Unavailable" will be displayed on the multi-information
display:
Actual vehicle speed falls below approximately 25 mph (40 km/h) when there are no
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vehicles ahead.
The preceding vehicle leaves the lane when your vehicle is following at a vehicle speed
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below 25 mph (40 km/h). Otherwise, the sensor can not properly detect the vehicle.
VSC is activated.
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TRAC is activated for a period of time.
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When the VSC or TRAC system is turned off by pressing the VSC OFF switch.
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The sensor cannot detect correctly because it is covered in some way.
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The windshield wipers are operating at high speed (when the wiper switch is set to the
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"AUTO" mode or the high speed wiper operation position).
Brake automatically operated for long periods of time, such as traffic jams, etc.
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The parking brake is operated.
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The vehicle is stopped by system control on a steep incline.
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Pre-collision braking is activated.
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The following are detected when the vehicle has been stopped by system control:
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• The driver is not wearing a seat belt.
• The driver' s door is opened.
• The back door or hood is opened.
If vehicle-to-vehicle distance control mode is automatically canceled for any other rea-
son, there may be a malfunction in the system. Contact your Lexus dealer.
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