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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Cellular System, Entertainment System And Navigation System - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC B127A: Auxiliary Video Input Signal Circuit Open Circuit >> Circuit/System Description

Circuit/System Description

The rear seat entertainment system has an auxiliary input assembly that contains a USB port, RCA type audio/video jacks and a wired headphone jack with volume control. Refer to the Owners Manual for information on compatible devices and supported media types/formats.

The USB port interfaces with a hub device, internal to the assembly. The assembly receives fused battery voltage and ground from the harness to power the internal hub device as well as providing additional amperage to power USB devices.

The internal hub device interfaces directly with the disc player via a standard USB cable. A Mini type USB connector is used to connect the cable at the disc player and the auxiliary input assembly. Mini type USB male to female connections are used for connecting USB cables together where an in-line connection is required. An in-line cable connection is typically found between the console and I/P harness.

The USB port allows connectivity to the rear seat entertainment system from portable media players or a USB storage device (memory stick/ flash drive).

Once a supported device is connected to the USB port, the device may be sourced to one or both of the rear displays using the remote control.