Microphone Circuit between Microphone and Navigation Receiver Assembly [08/2015 - ]: Description

w/o Manual (SOS) Switch: 

The navigation receiver assembly and roof console box assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.

Using this circuit, the navigation receiver assembly sends power to the roof console box assembly (telephone microphone assembly), and the roof console box assembly (telephone microphone assembly) sends microphone signals to the navigation receiver assembly.

w/ Manual (SOS) Switch: 

The navigation receiver assembly and roof console box assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.

Using this circuit, the DCM (telematics transceiver) sends power to the roof console box assembly (telephone microphone assembly), and the roof console box assembly (telephone microphone assembly) sends microphone signals to the navigation receiver assembly via the DCM (telematics transceiver).