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Home >> Buick >> 2020 >> Envision Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 97 (Cellular System, Entertainment System, And Navigation System - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Auxiliary Audio Input Malfunction (IOB) >> Circuit/System Testing >> USB Port

USB Port

WARNING: This page is about a different car, the 2018 Buick Regal TourX and 2018 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF/vehicle OFF, disconnect the USB cable connection at the A11 Radio.
    2. NOTE:

    USB cables and adapters for the following tests are found in the EL-50334-50  USB Cable and Adapter Kit.

  2. Connect the EL-50334-1 Type A male to Mini A male USB Cable to the A11 Radio. Connect the EL-50334-3 Type A female to Type A female adapter to the EL-50334-1 Cable.
  3. Ignition ON/vehicle in Service Mode, radio ON, connect the EL-50334-20  Multi-Media Interface Tester (MIT) to the EL-50334-3 adapter.
  4. Verify the infotainment system switches to USB as the audio source.
    • If the infotainment system does not switch to USB as the audio source 

      Replace the A11 Radio.

    • Go to next step: If the infotainment system switches to USB as the audio source 
  5. Ignition OFF/vehicle OFF, connect the vehicle USB cable to the A11 Radio. Disconnect the I/P to floor console inline USB cable connector.
    6. NOTE:

    The EL-50334-3 or EL-50334-4 adapter may be required for the following test.

  6. Ignition ON/vehicle in Service Mode, radio ON, connect the EL-50334-20  Multi-Media Interface Tester (MIT) to the I/P side of the inline USB cable connector.
  7. Verify the infotainment system switches to USB as the audio source.
    • If the infotainment system does not switch to USB as the audio source 

      Replace the I/P USB cable assembly.

    • Go to next step: If the infotainment system switches to USB as the audio source 
  8. Ignition OFF/vehicle OFF, connect the I/P to floor console inline USB cable connector.
  9. Disconnect the USB cable at the X83 Auxiliary Audio Input. Connect the EL-50334-4 Type A female to Mini B female adapter to the USB cable.
  10. Ignition ON/vehicle in Service Mode, radio ON, connect the EL-50334-20  Multi-Media Interface Tester (MIT) to the EL-50334-4 adapter.
  11. Verify the infotainment system switches to USB as the audio source.
    • If the infotainment system does not switch to USB as the audio source 

      Replace the console USB cable assembly.

    • Go to next step: If the infotainment system switches to USB as the audio source 
  12. Test or replace the X83 Auxiliary Audio Input.
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