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Home >> Cadillac >> 2009 >> XLR Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 112 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Speaker Malfunction >> Circuit/System Testing >> Speaker Circuit Malfunction
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Speaker Circuit Malfunction

WARNING: This page is about a different car, the 2008 Cadillac XLR. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, inspect the appropriate speaker and the surrounding interior trim for proper and secure mounting. Improper speaker mounting or loose trim may cause an audible buzz or distortion.
    • If the speaker or surrounding interior trim is found to be loose or improperly secured, correctly secure the item.
  2. Disconnect the X2 harness connector at the audio amplifier.
  3. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
    • Left low level audio signal (+) terminal B10
    • Left low level audio signal (-) terminal B9
    • Right low level audio signal (+) terminal B11
    • Right low level audio signal (-) terminal B8
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the CD changer.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the CD changer.
  4. Ignition OFF, connect the X2 harness connector at the audio amplifier.
  5. Disconnect the harness connector at the inoperative speaker.
  6. Radio ON, test for 5.0-7.5 volts between the signal circuit terminal A and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the audio amplifier.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the audio amplifier.
  7. Test for 5.0-7.5 volts between the signal circuit terminal B or terminal C and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the audio amplifier.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the audio amplifier.
  8. If all circuits test normal, replace the inoperative speaker.
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