Toyota Prius 2019 Manual page 321

Adjusting the set speed
To change the set speed, operate the lever until the desired set speed
is displayed.
Increases the speed
1
(Except when the vehicle has been
stopped by system control in vehi-
cle-to-vehicle
mode)
Decreases the speed
2
Fine adjustment:
move the lever in the desired
direction.
Large adjustment: Hold the lever up or down to change the speed,
and release when the desired speed is reached.
In the vehicle-to-vehicle distance control mode, the set speed will be
increased or decreased as follows:
For the U.S. mainland, Hawaii

Fine adjustment: By 1 mph (1.6 km/h)
the lever is operated
Large adjustment: Increases or decreases in 1 mph (1.6 km/h)
*
(0.6 mph)
For Canada, Guam, Saipan and Puerto Rico

Fine adjustment: By 1 mph (1.6 km/h)
the lever is operated
Large adjustment: Increases or decreases in 5 mph (8 km/h)
*
(3.1 mph)
In the constant speed control mode (P. 325), the set speed will be
increased or decreased as follows:
Fine adjustment: By 1 mph (1.6 km/h)
the lever is operated
Large adjustment: The speed will continue to change while the lever is
held.
*
1
: When the set speed is shown in "MPH"
*
2
: When the set speed is shown in "km/h"
PRIUS_OM_OM47C35U_(U)
4-5. Using the driving support systems
distance control
Momentarily
2
increments for as long as the lever is held
2
increments for as long as the lever is held
*
1
or 1 km/h (0.6 mph)
*
1
or 1 km/h (0.6 mph)
*
1
or 1 km/h (0.6 mph)
321
4
*
2
each time
*
1
or 1 km/h
*
2
each time
*
1
or 5 km/h
*
2
each time