PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL NOTICE: When disconnecting the cable from the negative (-) auxiliary battery terminal, initialize the following systems after the cable is reconnected.
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Navigation System(for Gasoline Model): Microphone Circuit
DESCRIPTION w/o Manual (SOS) Switch: The radio and display receiver assembly, roof console box sub-assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines. Using this circuit, the radio and display receiver assembly sends power to ...