Lexus IS300H 2017 Manual page 302

302
4-5. Using the driving support systems
Dynamic radar cruise control can be set when
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The shift lever is in D or range 4 or higher of S has been selected.
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Range 4 or higher of D has been selected by using the paddle shift switch.
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Vehicle speed is above approximately 50 km/h (30 mph).
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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.
Actual vehicle speed falls below approximately 40 km/h (25 mph).
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VSC is activated.
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TRC is activated for a period of time.
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When the VSC or TRC system is turned off by pressing the VSC OFF switch.
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When snow mode is set.
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The sensor cannot detect correctly because it is covered in some way.
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Pre-collision braking is activated.
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If vehicle-to-vehicle distance control mode is automatically canceled for any other rea-
son, there may be a malfunction in the system. Contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.