Lexus RX300 2001 Owner's Manual page 29

KEYS AND DOORS
11L021-2
When using a key containing a transponder chip,
observe the following precautions:
D When starting the engine, do not use the key with a
key ring resting on the key grip and do not press the
key ring against the key grip. Otherwise the engine
may not start, or may stop soon after it starts.
10
11R055
D When starting the engine, do not use the key with
other transponder keys around (including the flat key
and keys of other vehicles) and do not press other
key plates against the key grip. Otherwise the engine
may not start, or may stop soon after it starts. If this
happens, remove the key once and then insert it
again after taking off 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 engine.
2001 MY RX300_U (OM48431U)