Circuit/System Testing

WARNING: This page is about a different car, the 2008 Cadillac XLR. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT:

Ensure the vehicle is outside in an area with an unobstructed view of the southern sky. Turn XM radio ON. Tune the radio to satellite channel 1. XM reception should be clear.
Contact XM radio services at 1-800-852-9696 to verify the customers account status or possible network problems.

Ignition OFF, disconnect the appropriate digital radio antenna coax from the digital radio receiver (DRR). Connect the EL-48028 to the DRR. See Special Tools .
Ignition ON, radio tuned to XM, verify XM reception is clear and uninterrupted.
- If reception is not clear, replace the DRR.
Ignition OFF, disconnect the appropriate digital radio antenna coax from the digital radio antenna.
Ignition ON, test for less than 1 volt between the antenna coax center terminal and ground.
- If greater than the specified range, replace the antenna coax.
Test for infinite resistance between the antenna coax center terminal and ground.
- If less than the specified value, replace the antenna coax.
Test for less than 5 ohms on the antenna coax center circuit from end to end.
- If greater than the specified range, replace the antenna coax.
Test for less than 5 ohms between the two ends of the coax cable outer shield.
- If greater than the specified range, replace the antenna coax able.
Test for infinite resistance between the coax center terminal and the outer shield.
- If less than the specified value, replace the antenna coax.
If all circuits test normal, replace the appropriate digital radio antenna.