Lexus GS430 User Manual page 412

STARTING AND DRIVING
When the detection range of the sensors is
shorter
In the following cases, the sensors will detect an obstacle
about 50 cm (1.5 ft.) from either front corner of the vehicle
and the steering guidance will be stopped. Accordingly,
the tire orientation symbol on the screen does not appear.
And only the warning according to the distance up to the
obstacle is given.
a. Any one of the sensors is malfunctioning.
b. Any one of the steering sensors is malfunctioning.
c. The steering sensor signal cannot be received properly.
d. The correct vehicle information cannot be given due to
extremely low battery voltage.
e. Proper steering detection (going straight) cannot be
detected
In case of a., when the intuitive parking assist returns to
normal, the steering guidance also comes back automatically.
In case of b. through e., the steering guidance also comes back
automatically after the neutral point of the steering sensor
calibration is completed.
388
Rear view monitor display (Vehicles with rear
view monitor system)
G31066
On vehicles equipped with rear view monitor system, a
warning appears on the right top of the rear view monitor
in the following conditions.
D When the selector lever is put in "R" and the rear view
monitor is turned on.
D When the intuitive parking assist main switch is turned on
and any sensor detects an obstacle.
Although "Display Off" is selected in the intuitive parking assist
setting screen, the warning appears on the right top of the rear
view monitor.