Remote Auxiliary Jack/USB Adapter
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
A remote 3.5 mm auxiliary stereo jack and USB connector allows playback of audio signals from remote devices (e.g., laptop computer, IPOD, MP3 player, etc.). The Aux jack is a five wire connector interface. The USB is a four wire plus shield USB cable interface. The USB connector uses the USB standards, 1.1 and 2.0. This type of connector supports rates for low speed (1.5 Mb/s), full speed (12 Mb/s), and high speed (480 Mb/s). The remote Aux jack/USB adapter is located in the rear console bin.
The radio detects the presence or absence of an audio mini-plug through the AuxJackDetect input. When the audio mini-plug is inserted in the Aux Detect Switch the mechanical switch closes. When removed the switch is open.