LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 393 (Cellular, Entertainment, And Navigation - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> No Global Positioning System (GPS) Reception (Without UE1/UQT) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
  1. Vehicle OFF, disconnect the Cell/GPS coax cable connector at the A11 Radio.
  2. Connect the EL-49903-1  OnStar Test Antenna, Navn-Cell Comn to the A11 Radio. Place the test antenna on the roof of the vehicle, ignition ON.
  3. Verify DTC B13AA is not set.
    • If DTC B13AA is set. 

      Replace the A11 Radio.

    • Go to next step: If DTC B13AA is not set. 
  4. Vehicle OFF, disconnect the EL-49903-1  OnStar Test Antenna, Navn-Cell Comn from the A11 Radio.
  5. Disconnect the Cell/GPS coax cable at the T4P High Frequency Antenna.
  6. Test the coax cable between the A11 Radio and the T4P High Frequency Antenna. Refer to component testing.
    • If the coax cable does not pass the test 

      Replace the coax cable.

    • Go to next step: If the coax cable passes the test 
  7. Replace the T4P High Frequency Antenna.
scientia non olet · About LEMON Manuals