Lexus LS460 Owner's Manual page 866

836
7-2. Steps to take in an emergency

When "Electrical equipment operation is limited" is shown
This message indicates that the battery is low. When the message is shown,
operation of electrical equipment that uses a large amount of electric power,
such as the air conditioning system, may be limited temporarily. This does
not indicate a malfunction. Operation of electrical equipment will be restored
after the battery is charged.

Warning buzzer
In some cases, the buzzer may not be heard due to ambient noise or sounds
from the audio system.
LS460_EE (OM50D49E)