Circuit Description
WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
The infrared transmitter is internal to the DVD display and is grounded and powered by the DVD control module. When listening to the remote control, the remote sends an infrared signal to the infrared receiver. No external circuits are involved.