Toyota PRIUS Owner's Manual page 438

438
4-5. Using the driving support systems
When a level beep is emit-
8
ted and the stop indicator
(→P. 419) is shown on the
display, stop the vehicle.
Change the shift position to R.
9
Assume an ordinary posture for backing up, rest your hands
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lightly on the steering wheel without applying any force, directly
confirm the safety of the area to the rear and around the vehicle
and slowly back up while adjusting your speed by depressing the
brake pedal.
Depending on the condition of the parking space, steps
may need to be repeated.
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