Test H: The Satellite Audio Is Inoperative/Does Not Operate Correctly

PINPOINT TEST H: THE SATELLITE AUDIO IS INOPERATIVE/DOES NOT OPERATE CORRECTLY

Normal Operation
The satellite digital audio receiver system (SDARS) module receives voltage through circuit SBB41 (RD), and ground through circuit GD114 (BK/BU). Digital signals are received by the satellite antenna and sent to the SDARS module, which then provides analog audio signals to the audio control module (ACM), or to the rear entertainment module (RETM), if equipped. The SDARS module, the ACM, and the RETM communicate using the medium speed controller area network (MS-CAN).

Circuits VME41 (GN/OG), RME41 (YE/BU), VME42 (VT/BN), and RME42 (YE/BU) transmit left and right channel audio signals to the ACM. When there is a fault on any of these circuits, the audio quality is reduced. If the circuits for a specific channel are shorted together, loss of audio on that entire channel will occur. This can be detected by using the Satellite Radio Tones Test, available in the IDS scan tool.

- U0184 (Lost Communication With Radio [ACM]) - sets when the SDARS module is missing messages from the ACM for greater than 5 seconds. This results in loss of satellite radio functionality.
- U0196 (Lost Communication With Entertainment Control Module - Rear [AUX]) - sets when the SDARS module is missing messages from the RETM for greater than 5 seconds. Although the 2 modules may not be communicating, the SDARS module will continue to broadcast satellite audio, and no symptom may be present.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- SDARS module
- RETM
- ACM

H1-H2:

H3-H6:

H6-H9: