Lexus GS430 User Manual page 405

Back sensors
G31059
" 3 About 60 cm (2.0 ft.) to about 150 cm (5.0 ft.)
4 About 45 cm (1.4 ft.) to about 60.0 cm (2.0ft.)
5 About 35 cm (1.1 ft.) to about 45.0 cm (1.4 ft.)
6 Less than about 35 cm (1.1 ft.)
STARTING AND DRIVING
The back sensor only operates when the transmission is
in "R", it checks the approximate distance to obstacles
close to the rear of the vehicle, and sounds a warning
depending on the distance.
1 Multi−information display:
The indicator bars will come on depending on the
distance to the obstacle and will flash when the distance
between the vehicle and the obstacle is less than about
35 cm (1.1 ft.).
2 Screen:
The indicator bars will come on in yellow depending on
the distance to the obstacle. When the distance between
the vehicle and the obstacle is less than about 35 cm (1.1
ft.), the yellow indicator bars will turn red.
Beeps:
As distance to the obstacle gets closer, the interval of the
intermittent sound gets shorter, and then finally to a continuous
sound when the distance between the vehicle and the obstacle
is less than about 35 cm (1.1 ft.).
CAUTION
When backing up, be sure to confirm a safe distance
around your vehicle with your eyes to avoid an accident.
381