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:

Normal Operation
The satellite radio receiver receives voltage (at all times) through circuit SBP12 (GN/RD), and ground through circuit GD103 (BK/BU). Digital signals are received by the satellite antenna and sent to the satellite radio receiver, which then provides audio signals to the audio unit through circuits RME41 (BU/BN), RME42 (YE/BU), VME41 (GN/OG), and VME42 (VT/BN).

Possible Causes
- Circuit RME41 (BU/BN) open, short to ground or voltage
- Circuit RME42 (YE/BU) open, short to ground or voltage
- Circuit VME41 (GN/OG) open, short to ground or voltage
- Circuit VME42 (VT/BN) open, short to ground or voltage
- Satellite radio receiver
- Audio unit