Have the malfunction repaired immediately.
After taking the specified steps to correct the suspected problem, check that the warning message and light go off.
See also:
Radar sensor
The radar sensor detects vehicles or other obstacles on or near the road ahead
and determines whether a collision is imminent based on the position, speed, and
heading of the obstacles.
...
If the vehicle battery is discharged
If you have a set of jumper (or booster) cables and a second vehicle with a 12
volt battery, you can jump start your Lexus by following the steps below.
Open the hood.
Connecting the jumper cab ...
Intuitive parking assist
The distance from your vehicle to nearby obstacles when parallel
parking or maneuvering into a garage is measured by the sensors and
communicated via the multi-information display, touch screen and ...