Lexus GS430 User Manual page 406

STARTING AND DRIVING
Numerous obstacles are detected on the front
and rear of the vehicle simultaneously
G31060
When obstacles are detected on the front and rear of the
vehicle at the same time; the multi−information display
and screen illuminate their relevant indicator bars. And
beeps are as follows:
1 Obstacles detected on the front and rear of the
vehicle are not in areas where continuous beeping
should sound:
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The warning for the obstacle closer to the vehicle will be
issued. The above illustration indicates the obstacle detected
by the back sensors is closer to the vehicle. So, the warning for
the obstacle detected by the back sensors will be given.
2 The obstacle detected on the front or rear of the
vehicle is in an area where continuous beeping
should sound:
If the possibility of collision with the obstacle is high as shown,
the system warns the driver by continuous beeping (repeating
6 intermittent beeps and one longer beep as one cycle).
3 Both obstacles detected on the front and rear of the
vehicle are in areas where continuous beeping
should sound:
If the possibility of collision with the obstacles is very high as
shown, the system warns the driver by continuous beeping
(repeating 2 quick beeps and one longer beep as one cycle).
CAUTION
It might be difficult to hear beeps due to the volume of
audio or air flow noise of air conditioning. To avoid an
accident or injury, drive slowly using the brakes while
confirming a safe distance around your vehicle with
your eyes.