Microphone Circuit between Microphone and Navigation Receiver Assembly [12/2015 - 11/2017]: Description

w/o Safety Connect System: 

The navigation receiver assembly and amplifier 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 amplifier microphone assembly, and the amplifier microphone assembly sends microphone signals to the navigation receiver assembly.

w/ Safety Connect System: 

The navigation receiver assembly and amplifier 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 amplifier microphone assembly, and the amplifier microphone assembly sends microphone signals to the navigation receiver assembly via the DCM (telematics transceiver).