Pinpoint Test I: Poor Reception/No Sound - Satellite Audio
Information and Entertainment System
Pinpoint Tests
Pinpoint Test I: Poor Reception/No Sound - Satellite Audio
Normal Operation
Digital signals are received by the satellite antenna and sent to the Satellite Digital Audio Receiver System (SDARS) module, which then converts the signals and provides audio signals to the Audio Control Module (ACM).
A short to ground typically has no effect on the antenna signal. However, an open in the antenna circuit will result in no sound from the satellite radio system. A short to voltage in the antenna circuit can have varying effects on the system.
- DTC B1031 (SDARS Satellite Antenna Open) - sets when an open or high resistance is detected in the satellite antenna circuit. This DTC can be either continuous or on-demand.
- DTC B1032 (SDARS Satellite Antenna Short) - sets when a short to ground is detected in the satellite antenna circuit. This DTC can be either continuous or on-demand.
This pinpoint test is intended to diagnose the following:
- Obstructions to the line of sight
- Satellite antenna cable
- Satellite antenna
- SDARS module
- Accessory Protocol Interface Module (APIM) (if equipped)
PINPOINT TEST I: POOR RECEPTION/NO SOUND - SATELLITE AUDIO
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
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I1 CHECK THE SATELLITE AUDIO CATEGORY SETTING
- Set the satellite audio category setting to ALL. For additional information, refer to the Owner's Literature.
- Scan for a good channel.
- Does the satellite audio system find a good channel with normal reception?
Yes
The system is operating correctly at this time. The concern was a result of no song being found in the selected category.
No
GO to I2.
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I2 CHECK THE OPERATION OF THE SATELLITE AUDIO
- Drive the vehicle to an open location, free of obstacles.
- Operate the audio system in satellite audio mode.
- Is the reception OK?
Yes
The system is OK at this time. ADVISE the customer that the satellite signal can be affected by obstructions to the satellite antenna line of sight.
No
GO to I3.
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I3 CHECK FOR A SATELLITE ANTENNA FAULT MESSAGE
- Operate the audio system in satellite audio mode and observe the ACM display.
- Does the ACM display indicate a satellite radio antenna fault?
Yes
GO to I4.
No
Go To Pinpoint Test H. Pinpoint Test H: The Satellite Audio Is Inoperative/Does Not Operate Correctly
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I4 CHECK THE SATELLITE ANTENNA CABLE
- Ignition OFF.
- Disconnect: Satellite Antenna Connection (At Satellite Radio Receiver).
- Disconnect: Satellite Antenna Connection (At Satellite Radio Antenna).
- Measure the resistance of the satellite radio antenna cable between the SDARS module and the satellite antenna connection.
- Is the resistance less than 1 ohm?
Yes
GO to I5.
No
INSTALL a new satellite antenna cable. CLEAR the DTCs. REPEAT the self-test.
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I5 ISOLATE THE SATELLITE ANTENNA
- Install a new satellite antenna. Refer to Antenna Service and Repair.
- Operate the audio system in satellite audio mode.
- Is the reception OK?
Yes
The concern was caused by an inoperative satellite radio antenna. The system is operating correctly at this time. CLEAR the DTCs. REPEAT the self-test.
No
GO to I6.
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I6 CHECK FOR CORRECT SDARS MODULE OPERATION
- Ignition OFF.
- Disconnect the SDARS module connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the SDARS module connector and make sure it seats correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?
Yes
INSTALL a new SDARS module. REFER to Satellite Digital Audio Receiver System (SDARS) Module Service and Repair.
TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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