Toyota PRIUS Owner's Manual page 327

■
Temporary cancellation of functions
When operation conditions are no longer met, a function may be temporarily
canceled. However, when the operation conditions are met again, operation
of the function is automatically restored. (→P. 326)
■
Steering control function
Depending on the vehicle speed, lane departure situation, road conditions,
etc., the operation of the functions may not be recognized or the functions
may not operate.
■
Lane departure alert function
The warning buzzer may be difficult to hear due to external noise, audio play-
back, etc.
■
Hands off steering wheel alert
When the system determines that the driver has removed their hands from
the steering wheel while the steering control function is operating, a warning
message is displayed on the multi-information display.
If the driver continues to keep their hands off of the steering wheel, the
buzzer sounds, a warning message is displayed and the function is tempo-
rarily canceled. This alert also operates in the same way when the vehicle is
driven with the steering wheel lightly gripped. However, depending on the
road conditions, etc., the function may not cancel.
■
White (yellow) lines are only on one side of road
The LDA system will not operate for the side on which white (yellow) lines
could not be recognized.
PRIUS_OM_OM47A31E_(EE)
4-5. Using the driving support systems
327
4