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Home >> Buick >> 2012 >> Regal Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 227 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Auxiliary Audio Input Malfunction >> Circuit/System Testing >> USB Port with KTA

USB Port with KTA

WARNING: This page is about a different car, the 2011 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X301 I/P to floor console harness connector.
    2. NOTE: A USB Type A female to female adaptor (gender changer) may be required for the following test.
  2. Ignition ON, radio ON, connect a device to the USB connection of the I/P side of the X301 harness connector. Verify the infotainment system to switches USB as the audio source.
    • If the infotainment system does not switch to USB as the audio source, ensure the USB cable is properly connected at the T11 multimedia player interface module. If the cable connection checks OK, replace the I/P USB cable assembly and reconnect the USB device. If the infotainment system still does not switch to USB as the audio source, replace the T11 multimedia player interface module.
  3. Ignition OFF, reconnect the X301 I/P to floor console harness connector.
  4. Ignition ON, radio ON, connect a device to the console USB port. Verify the infotainment system to switches USB as the audio source.
    • If the infotainment system does not switch to USB as the audio source, ensure the USB cable is properly connected at the X92 USB receptacle. If the cable connection checks OK, replace the X92 USB receptacle and reconnect the USB device. If the infotainment system still does not switch to USB as the audio source, replace the console USB cable assembly.
  5. Ignition OFF, disconnect the X1 harness connector at both the A11 radio and the T11 multimedia player interface module. Test for infinite resistance between the circuits listed below and ground:
    • auxiliary audio common circuit A11 radio X1 terminal 23
    • left auxiliary audio circuit A11 radio X1 terminal 24
    • right auxiliary audio circuit A11 radio X1 terminal 10
    • If not the specified value, test the signal circuit for a short to ground.
  6. Test for less than 5 Ω between the A11 radio X1 terminal 24 and the T11 multimedia player interface module X1 terminal 14.
    • If greater than the specified value, test the signal circuit for an open/high resistance.
  7. Test for less than 5 Ω between the A11 radio X1 terminal 10 and the T11 multimedia player interface module X1 terminal 15.
    • If greater than the specified value, test the signal circuit for an open/high resistance.
  8. Test for less than 5 Ω between the A11 radio X1 terminal 23 and the T11 multimedia player interface module X1 terminal 4.
    • If greater than the specified value, test the signal circuit for an open/high resistance.
  9. Reconnect the X1 harness connector at the A11 radio.
  10. Ignition ON, test for less than 1 V between the circuits listed below and ground:
    • auxiliary audio common circuit T11 multimedia player interface module X1 terminal 4
    • left auxiliary audio circuit T11 multimedia player interface module X1 terminal 14
    • right auxiliary audio circuit T11 multimedia player interface module X1 terminal 15
    • If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the A11 radio.
  11. If all circuits test normal, replace the T11 multimedia player interface module and reconnect all harness connectors. Connect and operate the portable audio playback device. If audio cannot be heard from the device, replace the A11 radio.
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