Toyota Lexusc Owner's Handbook Manual page 610

NOTICE
D Once the emergency button is pushed, an emergency
call cannot be cancelled.
D If your vehicle is in area where the GPS signal is weak
or cannot be received the Lexus Link System, the
color of the indicator light will change from green to
amber. The system is not in operation. This system
is only operational in GPS and analog cellular
coverage areas. Upon subscription expiration, all
Lexus Link services (i.e. automatic notification,
emergency call functions, service call functions,
door locking/unlocking function) are deactivated.
IN CASE OF AN EMERGENCY
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