Lexus GS430 User Manual page 411

When the neutral point of the steering sensor is unknown
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If the memorized neutral point of the steering is erased by
replacing the battery, the vehicle symbol, steering guide
symbol and arrows come on.
If only the neutral point of the steering sensor is unknown, the
warning appears only on the multi−information display.
If this warning appears, calibrate the neutral point of the
steering using either of the following:
D Turn the steering wheel either way fully and then in the
opposite direction fully and slowly, with the vehicle stopped.
D Drive on roads (with as few curves as possible and without
backing up) for more than about 5 minutes.
If this warning goes out, the calibration of the steering neutral
point is completed. If the warning still remains on, have the
sensor checked by your Lexus dealer as soon as possible.
STARTING AND DRIVING
As the intuitive parking assist might be malfunctioning in
the following cases, have it checked by your Lexus dealer.
D The indicator in the instrument cluster does not come on
and a beep does not sound even when the intuitive parking
assist main switch is turned on.
D The warning comes on despite no obstacle around the
vehicle.
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