Lexus LS460 Owner's Manual page 378

CAUTION

Determining the direction the driver is facing and whether the driver's eyes
are open or closed (vehicles with driver monitor system)
The direction the driver is facing and whether the driver's eyes are open or
closed may not be determined correctly if the following conditions exist:

There is an object between the driver monitor sensor and the driver's face,
such as when the sensor is blocked.

A part of the driver's face is covered.

The sensor or the driver's face is exposed to intense light such as sunlight.

The driving posture is improper.

The vehicle is parked.

Handling the driver monitor sensor (vehicles with driver monitor system)
Observe the following to ensure the driver monitor sensor can function
effectively.
Failure to do so may result in a malfunction or may prevent the system
from correctly determining the direction the driver is facing and whether
the driver's eyes are open or closed, resulting in an unexpected accident.

Do not disassemble, damage, lift or pull on the sensor.

Do not touch the sensor while driving.

Do not wet or spill water on the sensor.

Do not drop anything on or allow anything to hit against the sensor. Do
not subject the sensor to an impact.

Make sure that there are no scratches, dirt or stickers on the side of the
sensor that faces the driver.

Do not place any objects in front of the side of the sensor that faces the
driver or cover the sensor.
LS460_EE (OM50D49E)
4-5. Using the driving support systems
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