Toyota Lexusc Owner's Handbook Manual page 33

KEYS AND DOORS
4. Start the engine within 60 seconds after the security
indicator light goes out. You cannot start the engine if 60
seconds have past after the security indicator went off. You
need to remove the key plate from the ignition switch and try
it again from the step 2.
NOTICE
D Do not let the key case become bent as the key plate
may fall out or become bent also.
D The flat key is designed for emergency use only. So
do not use it regularly instead of other master keys.
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