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Home >> Buick >> 2016 >> Cascada Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Auxiliary Audio Input Malfunction (With SD Card Reader) >> Circuit/System Testing >> USB Port
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USB Port

WARNING: This page is about a different car, the 2016 Chevrolet Malibu Limited. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X1 harness connector at the X83 Auxiliary Audio Input.
  2. Test for less than 10 Ω between the ground circuit terminal 4 and ground.
    • If 10 Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • If less than 10 Ω 
  3. Verify that a test lamp illuminates between the B+ circuit terminal 6 and ground.
    • If the test lamp does not illuminate 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the B+ circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
    • If the test lamp illuminates 
  4. Ignition OFF, connect the X1 harness connector at the X83 Auxiliary Audio Input.
  5. Disconnect the USB cable connection at the X83 Auxiliary Audio Input and at the I/P to floor console inline USB cable connector.
    NOTE: USB cables and adapters for the following tests are found in the EL-50334-50  USB Cable and Adapter Kit.
  6. Connect the EL-50334-2  Type A female to Mini B male USB Cable to the X83 Auxiliary Audio Input and the I/P side of the I/P to floor console inline USB cable connector.
  7. Ignition ON, radio ON, connect the EL-50334-20  Multi-Media Interface Tester (MIT) to the X83 Auxiliary Audio Input.
  8. Verify the infotainment system does not switch to USB as the audio source.
    • If the infotainment system switches to USB as the audio source 

      Replace the console side USB cable assembly.

    • If the infotainment system does not switch to USB as the audio source 
  9. Ignition OFF, connect the vehicle USB cable to the X83 Auxiliary Audio Input.
  10. Disconnect the USB cable at the A11 Radio.
  11. Connect the EL-50334-1  Type A male to Mini A male USB Cable to the A11 Radio and the console side of the I/P to floor console inline USB cable connector.
  12. Ignition ON, radio ON, connect the EL-50334-20  Multi-Media Interface Tester (MIT) to the X83 Auxiliary Audio Input.
  13. Verify the infotainment system switches to USB as the audio source.
    • If the infotainment system does not switch to USB as the audio source 
    1. Replace the X83 Auxiliary Audio Input.
    2. Connect all harness connectors.
    3. Ignition ON, radio ON, connect the EL-50334-20  Multi-Media Interface Tester (MIT) to the X83 Auxiliary Audio Input.
    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.
    • If the infotainment system switches to USB as the audio source 
  14. Replace the I/P side USB cable assembly.
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