Toyota 2015 Prius Owner's Manual page 292

2-4. Using other driving systems
Adjusting the set speed
■
To change the set speed, operate the lever until the desired set
speed is obtained.
The set speed will be increased or decreased as follows:
Fine adjustment: By approximately 1 mph (1.6 km/h) each time
the lever is operated.
Large adjustment: The set speed can be increased or
decreased continually until the lever is released.
Canceling and resuming the constant speed control
■
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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.
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Pulling the lever toward you
cancels the constant speed
control.
The speed setting is also can-
celed when the brakes are
applied.
Pushing
resumes
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speed control.
Resuming is available when
the vehicle speed is more
than approximately 25 mph
(40 km/h).
the lever up
the constant