Microphone Circuit between Microphone and Navigation Receiver Assembly [11/2015 - ]: Description

w/o Manual (SOS) Switch

The navigation receiver assembly and telephone microphone assembly*1 or map light assembly (telephone microphone assembly)*2 are connected to each other using the microphone connection detection signal lines.
Using this circuit, the navigation receiver assembly sends power to the telephone microphone assembly*1 or map light assembly (telephone microphone assembly)*2, and the telephone microphone assembly*1 or map light assembly (telephone microphone assembly)*2 sends microphone signals to the navigation receiver assembly.

w/ Manual (SOS) Switch

The navigation receiver assembly and telephone microphone assembly*1 or map light assembly (telephone microphone assembly)*2 are connected to each other using the microphone connection detection signal lines.
Using this circuit, the DCM (telematics transceiver) sends power to the telephone microphone assembly*1 or map light assembly (telephone microphone assembly)*2, and the telephone microphone assembly*1 or map light assembly (telephone microphone assembly)*2 sends microphone signals to the navigation receiver assembly via the DCM (telematics transceiver).