Microphone Circuit [10/2019 - 08/2021]: Description
WARNING: This page is about a different car, the 2022 Lexus ES 300h, 2021 Lexus ES 300h, 2020 Lexus ES 300h, and 2019 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
- The radio receiver assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines.
- Using this circuit, the radio receiver assembly sends power to the telephone microphone assembly, and the telephone microphone assembly sends microphone signals to the radio receiver assembly.*1
- Using this circuit, the DCM (telematics transceiver) sends power to the telephone microphone assembly, and the telephone microphone assembly sends microphone signals to the radio receiver assembly via the DCM (telematics transceiver).*2
- *1: w/o Manual (SOS) Switch
- *2: w/ Manual (SOS) Switch