Test I: The Audio Unit Is Inoperative/Does Not Operate Correctly - Satellite Audio

PINPOINT TEST I: THE AUDIO UNIT IS INOPERATIVE/DOES NOT OPERATE CORRECTLY - SATELLITE AUDIO

I1-I4:

I5-I6:

Normal Operation
The satellite radio receiver receives voltage (at all times) through circuit 956 (OG/LG), and ground through circuit 1204 (BK/OG). Digital signals are received by the satellite antenna and sent to the satellite radio receiver, which then provides audio signal to the audio unit through circuits 1803 (WH), 1804 (LG), 1805 (RD), and 1806 (BK).

The satellite radio receiver communicates using the controller area network (CAN) through circuits 2180 (WH/BK) and 2181 (BK/YE). Additionally, an open in circuit 956 (OG/LG) or circuit 1204 (BK/OG) will cause a no communication condition.

DTC U1084 - sets when the audio unit does not transmit certain CAN messages to the satellite radio receiver.

Possible Causes
- Circuit 1803 (WH) open, short to ground or voltage
- Circuit 1804 (LG) open, short to ground or voltage
- Circuit 1805 (RD) open, short to ground or voltage
- Circuit 1806 (BK) open, short to ground or voltage
- Satellite radio receiver
- Audio unit