Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the antenna coax from the digital radio receiver (DRR). Connect the test antenna to the DRR.
- Turn the ignition ON, radio ON tuned to XM. Is the reception improved?
- If the reception is not improved, replace the DRR.
- Ignition Off. Disconnect the DRR antenna from the coaxial cable. Test the resistance of the antenna coaxial cable center conductor from end to end. Verify the resistance is less than 5 ohms.
- If the resistance is greater than 5 ohms, replace the antenna coaxial cable.
- Test the resistance of the antenna coaxial cable outer shield from end to end. Verify the resistance is less than 5 ohms.
- If the resistance is greater than 5 ohms, replace the antenna coaxial cable.
- Test the resistance of the antenna coaxial cable between the center conductor and the outer conductor. Verify there is infinite resistance between both conductors.
- If there is less than infinite resistance between the inner conductor and the outer conductor of the coaxial cable, replace the antenna coaxial cable. If the coaxial cable tests normal, replace the digital radio antenna.