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Home >> Buick >> 2013 >> Verano Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 194 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Auxiliary Audio Input Malfunction (with SD Card Reader) >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2012 Buick Verano. However, it is still accessible from the selected car via links, so may be relevant.

Auxiliary Audio Input Jack

  1. Ignition OFF, disconnect the X1 harness connector at the X83 auxiliary audio input. Ignition ON, radio ON.
  2. Test for 2.5-3.5 V between the signal circuit terminal 5 and ground.
    • If less than 2.5 V 
    1. Ignition OFF, disconnect the X1 harness connector at the A11 radio.
    2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the A11 radio.
    • If greater than 3.5 V 
    1. Ignition OFF, disconnect the X1 harness connector at the A11 radio, ignition ON.
    2. Test for less than 1 V between the detection circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the A11 radio.
    • If between 2.5-3.5 V 
  3. Test for less than 1 V between the signal circuits listed below and ground:
    • Left auxiliary audio signal circuit terminal 1
    • Right auxiliary audio signal circuit terminal 2
    • Auxiliary audio common signal circuit terminal 3
    • If 1 V greater 
    1. Ignition OFF, disconnect the X1 harness connector at the A11 radio. Ignition ON.
    2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the A11 radio.
    • If less than 1 V 
  4. Ignition OFF, disconnect the X1 harness connector at the A11 radio.
  5. Test for infinite resistance between the signal circuits listed below and ground:
    • Auxiliary audio common signal circuit terminal 23
    • Left auxiliary audio signal circuit terminal 24
    • Right auxiliary audio signal circuit terminal 10
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • If infinite resistance 
  6. Test for less than 5 Ω between the signal circuit terminals listed below:
    • A11 radio terminal 24 X1 and the X83 auxiliary audio input terminal 1 X1
    • A11 radio terminal 10 X1 and the X83 auxiliary audio input terminal 2 X1
    • A11 radio terminal 23 X1 and the X83 auxiliary audio input terminal 3 X1
    • If 5 Ω greater 

      Repair the open/high resistance in the circuit.

    • If less than 5 Ω 
  7. Replace the X83 auxiliary audio input. Connect all harness connectors.
  8. Connect and operate the EL-50334-20  Multi-Media Interface Tester (MIT).
  9. Verify the audio from the test tool is heard through the vehicle infotainment system.
    • If audio is not heard from the test tool 

      Replace the A11 radio.

    • If audio is heard from the test tool 
  10. All OK.

USB Port

  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. NOTE:

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

  5. Disconnect the USB cable connection at the X83 auxiliary audio input and at the I/P to floor console inline USB cable connector.
  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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