Toyota PRIUS Owner's Manual page 341

Setting the vehicle speed (vehicle-to-vehicle distance control
mode)
Press the "ON-OFF" button to
1
activate the cruise control.
Radar cruise control indicator will
come on and a message will be
displayed on the multi-information
display.
Press the button again to deacti-
vate the cruise control.
If the "ON-OFF" button is pressed
and held for 1.5 seconds or more,
the system turns on in constant
speed control mode. (→P. 346)
Accelerate or decelerate, with
2
accelerator pedal operation, to
the desired
(above approximately 50 km/h
[30 mph]) and push the lever
down to set the speed.
Cruise control "SET" indicator will
come on.
The vehicle speed at the moment
the lever is released becomes the
set speed.
If the lever is operated while the
vehicle speed is below approxi-
mately 50 km/h (30 mph) and a
preceding vehicle is present, the
set speed will be adjusted to
approximately 50 km/h (30 mph).
PRIUS_OM_OM47A31E_(EE)
4-5. Using the driving support systems
vehicle speed
341
4