Lexus 2013 IS250 Owner's Manual page 231

Adjusting the set speed
To change the set speed, operate the lever until the desired set speed is
displayed.
1
Increases the speed
2
Decreases the speed
Fine adjustment: Momentarily move
the lever in the desired direction.
Large adjustment: Hold the lever in
the desired direction.
In the vehicle-to-vehicle distance control mode, the set speed will be
increased or decreased as follows:
• When the set speed is shown in "MPH"
Fine adjustment: By approximately 8 km/h (5 mph) each time the lever is
operated
Large adjustment: By approximately 8 km/h (5 mph) for each 0.3 seconds
the lever is held
• When the set speed is shown in "km/h"
Fine adjustment: By approximately 5 km/h (3.1 mph) each time the lever is
operated
Large adjustment: By approximately 5 km/h (3.1 mph) for each 0.3 sec-
onds the lever is held
In the constant speed control mode (P. 232), 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 speed can be increased or decreased continually
until the lever is released.
IS250_EE(OM53B11E)
4-5. Using the driving support systems
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4