Circuit/System Testing
WARNING: This page is about a different car, the 2018 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
- Vehicle OFF, disconnect the digital radio antenna coax cable from the A11 Radio. Connect the EL-48028 Digital Radio Test Antenna to the radio and place on the roof of the vehicle.
- Vehicle in Service Mode, radio tuned to XM channel 1.
- Verify DTC B125C is not set as current and XM reception is improved.
- If DTC B125C is set as current or XM reception is not improved
Replace the A11 Radio.
- Go to next step: If DTC B125C is not set as current and XM reception is improved
- If DTC B125C is set as current or XM reception is not improved
- Vehicle OFF, disconnect the digital radio antenna coax cable from the T2RR Antenna - Roof Rear.
- Verify the digital radio antenna coax cable passes the coax cable component test. Refer to Component Testing.
- If the coax cable does not pass the test
Replace the antenna coax cable
- Go to next step: If the coax cable passes the test
- If the coax cable does not pass the test
- Test or replace the T2RR Antenna - Roof Rear.