LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2019 >> CTS Base, AWD >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 82 (Cellular System, Entertainment System, And Navigation System - Description And Operation) >> Description and Operation >> Radio/Audio System Description and Operation (IOS/IOT) >> USB Port, SD Card Reader and Auxiliary port (If equipped)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

USB Port, SD Card Reader and Auxiliary port (If equipped)

WARNING: This page is about a different car, the 2018 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

The infotainment system may contain an assembly that has either a USB port, Auxiliary port, and may even have an SD card reader located within the drivers reach. The assembly interfaces with a hub device, internal to the auxiliary jack, USB, and memory card receptacle assembly. The auxiliary jack, USB, and memory card receptacle 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 remote radio receiver via a standard USB cable. A Mini type USB connector is used to connect the cable at the USB port and at the remote radio receiver and at the auxiliary jack, USB, and memory card receptacle. Standard USB male to female connections are typically 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.

USB Port 

The USB port allows connectivity to the infotainment system from portable media players or a USB storage device (memory stick/ flash drive). When a device is connected to the USB port, the device can be controlled from the radio controls.

Not all portable media player devices or file types are compatible. Connection to USB HUB devices is not supported.

Refer to the owner's manual for information on USB devices, control, and operation.

SD Card Reader 

On Navigation vehicles the SD card will contain the Map information for the vehicle region. The Map data will be updated quarterly either by replacing the SD card or wireless updates via WiFi on MY18> vehicles

Refer to the owners manual for information on the Navigation system.

Auxiliary Audio Input Jack 

The infotainment system may have a 3.5mm (1/8 in.) auxiliary audio input jack located in the center console. The auxiliary audio input jack interfaces directly with the radio. When a portable audio playback device is connected to the auxiliary jack, an internal switch detects the connection and the radio will switch to AUX as the audio source. Audio signals from the device are sent to the radio from the auxiliary jack via USB.