Components COMPONENTS ILLUSTRATION 
Inspection INSPECTION PROCEDURE 1. INSPECT NO. 6 INTERIOR ILLUMINATION LIGHT SUB-ASSEMBLY 
(a) Apply auxiliary battery voltage to the No. 6 interior illumination light sub-assembly and check that the light illuminates. OK:
If the result is not as specified, replace the No. 6 interior illumination light sub-assembly. Installation INSTALLATION PROCEDURE 1. INSTALL NO. 6 INTERIOR ILLUMINATION LIGHT SUB-ASSEMBLY (a) for RH Side: (1) Turn the No. 6 interior illumination light sub-assembly as shown in the illustration to install it. 
(b) for LH Side: (1) Turn the No. 6 interior illumination light sub-assembly as shown in the illustration to install it. 
2. INSTALL CONSOLE REAR END PANEL SUB-ASSEMBLY Click here Removal REMOVAL PROCEDURE 1. REMOVE CONSOLE REAR END PANEL SUB-ASSEMBLY Click here
2. REMOVE NO. 6 INTERIOR ILLUMINATION LIGHT SUB-ASSEMBLY (a) for LH Side: (1) Turn the No. 6 interior illumination light sub-assembly as shown in the illustration to remove it. 
(b) for RH Side: (1) Turn the No. 6 interior illumination light sub-assembly as shown in the illustration to remove it. 
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Audio And Visual 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 ...
