Toyota Lexusc Owner's Handbook Manual page 617

IN CASE OF AN EMERGENCY
Lexus Link System indicator and warning
lights
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1 Lexus Link System indicator light (green or amber)
2 Lexus Link System warning light (red)
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When the green indicator light remains on, you have an
active subscription. You can obtain any of the Lexus Link
services.
When the green indicator light starts flashing, the Lexus
Link Call Center is connected.
When the color of the indicator light changes from green
to amber, the GPS signal is weak or cannot be received.
If something is placed on the GPS antenna on the instrument
panel, remove it. It may be interfering the GPS signal
reception.
If nothing is placed on the GPS antenna and the amber
indicator light remains on for about 10 minutes or more, contact
your Lexus dealer.
When the engine is turned off and then restarted, the indicator
color changes to green. However, if the color of the indicator
light changes to amber again after 10 minutes or more, contact
your Lexus dealer.
When the warning light remains on, there is any problem
with the Lexus Link system.
When the indicator and warning lights go off, your
subscription has expired.