Lexus RX400h2006, Owner'S Manual

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KEYS AND DOORS
29
When starting the hybrid system, do not use the key
in proximity with other transponder keys (including
the flat key and keys of other vehicles), and do not
press other key plates against the key grip. Doing so
may prevent the system from starting, or may cause
the system to stop soon after it starts. If this
happens, remove the key once and then insert it
again after removing other transponder keys
(including the flat key and keys of other vehicles)
from the ring or while gripping or covering them with
your hand to start the system. Do not bend the key grip or flat key.
Do not cover the key grip or flat key with any material
that cuts off electromagnetic waves.
Do not knock the key or flat key hard against other
objects.
Do not leave the key or flat key exposed to high
temperatures for a long period, such as on the
dashboard or hood under direct sunlight.
Do not put the key or flat key in water or wash it in an
ultrasonic washer.
Do not use the key or flat key with electromagnetic
materials.