Circuit/System Testing

WARNING: This page is about a different car, the 2008 Cadillac STS. 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 antenna coax from the DRR. Connect the EL-48028 to the DRR.
Ignition ON, radio tuned to XM, verify XM reception has improved.
- If the XM reception has not improved, replace the DRR.
Ignition OFF, disconnect the antenna coaxial cable from the DRR antenna base.
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 of resistance between the two ends of the coax cable center conductor.
- If greater than the specified range, replace the antenna coax cable.
Test for less than 5 ohms of resistance 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 antenna coax center conductor and the outer shield.
- If less than the specified range, replace the antenna coax cable.
If all circuits test normal, replace the digital radio antenna.