Mute Signal Circuit between Radio Receiver and Telematics Transceiver [11/2018 - 10/2019]: Description
WARNING: This page is about a different car, the 2022 Toyota RAV4, 2021 Toyota RAV4, 2020 Toyota RAV4, and 2019 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
The DCM (telematics transceiver) sends a mute signal to the radio and display receiver assembly.
The radio and display receiver assembly controls the volume according to the mute signal from the DCM (telematics transceiver).