Pinpoint Test 11: The Satellite Radio Is Inoperative/Does Not Operate Correctly-Vehicles With External Satellite Radio Receiver
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PINPOINT TEST 11: THE SATELLITE RADIO IS INOPERATIVE/DOES NOT OPERATE CORRECTLY - VEHICLES WITH EXTERNAL SATELLITE RADIO RECEIVER
Normal Operation
Digital signals are received by the satellite radio antenna and sent to the satellite digital audio receiver system (SDARS) module. The digital audio signals are converted to analog and sent to the audio control module (ACM).When a satellite radio subscription is activated, the electronic serial number (ESN) of the SDARS module is associated with the vehicle identification number (VIN). As a result, the SDARS module cannot be swapped from one vehicle to another.In order for the satellite radio system to operate, messages are sent from the front controls interface module (FCIM) to the SDARS module when a button is pressed. The SDARS module responds with the appropriate function. The SDARS module also sends messages to the front display interface module (FDIM) in order to display satellite radio information on the display screen.If there is an open in the satellite radio antenna circuit, there is no satellite audio. The audio system display indicates a satellite antenna concern (the method varies according to the type of ACM) when the audio system is operated in satellite radio mode. To diagnose an open in the satellite radio antenna circuit, see - Pinpoint Test 12: Poor Reception/Poor Sound Quality/No Sound -Satellite Audio.
- DTC 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.
- DTC U0193 (Lost Communication With Digital Audio Control Module [SDARS]) - sets when the ACM is missing messages from the SDARS module for greater than 5 seconds. This results in loss of satellite radio functionality.
- DTC U0255 (Lost Communication With Front Controls Interface Module) - sets when the SDARS module is missing messages from the ACM for greater than 5 seconds. This results in loss of satellite radio functionality.
Possible Causes
- Subscription status
- Audio system concern
- SDARS module
Diagnostic Procedure
