Lexus LS 600h L 2012 Owner's Manual page 328

NOTICE
Camera sensors (with driver monitor system)
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Observe the following to ensure that the PCS functions correctly:
Do not subject a camera sensor to a strong impact or force, and do not disassem-
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ble a camera sensor.
Do not scratch camera lens, or let it get dirty.
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Headlights (with driver monitor system)
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Observe the following to ensure proper near-infrared ray projection:
Keep the headlights clean at all times.
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The detection performance may deteriorate if the high beams are misaligned or
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the high beams are inoperative.
Precautions for cleaning the driver monitor sensor (with driver monitor system)
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Gently wipe the sensor with a soft cloth to prevent damage.
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Wipe any excess dirt with a cloth dampened with neutral detergent, all liquids
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having been wringed out of the cloth. After that, wipe again with a dry cloth.
Do not use benzene, thinner, glass cleaners, wax, etc.
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2-4. Using other driving systems
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