Microphone Circuit [10/2019 - 09/2022]: Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2022 Lexus ES 350, 2022 Lexus ES 250, 2021 Lexus ES 350, 2021 Lexus ES 250, and 2020 Lexus ES 350. 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 and navigation ECU.*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 and navigation ECU via the DCM (telematics transceiver).*2
- *1: w/o Manual (SOS) Switch
*2: w/ Manual (SOS) Switch
- *1: w/o Manual (SOS) Switch