Sienna FWD V6-3.3L (3MZ-FE) (2006)
Step 2-3
INSPECTION PROCEDURE
Mute Signal Circuit Between Radio and Navigation Assembly and Television Display Assembly
Mute Signal Circuit between Radio and Navigation Assembly and Television Display Assembly
DESCRIPTION
The radio and navigation assembly controls the volume according to the MUTE signal from the television display assembly.
The MUTE signal is sent to reduce noise and a popping sound generated when switching the mode, etc.. If there is an open in the circuit, noise can be
heard from the speakers when changing the sound source. If there is a short in the circuit, even though the radio and navigation assembly is normal, no
sound or only an extremely small sound can be produced.