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Home >> Pontiac >> 2009 >> Torrent Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 80 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Speaker Malfunction >> Circuit/System Testing >> Speaker Circuit Malfunction - with Amplifier

Speaker Circuit Malfunction - with Amplifier

WARNING: This page is about a different car, the 2008 Pontiac Torrent and 2008 Chevrolet Equinox. 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 X3 harness connector at the audio amplifier.
  3. Radio ON, test for 5.0-7.5 volts between the appropriate speaker output circuit terminal listed below and ground.
    • Left rear speaker output (-) terminal 1
    • Right rear speaker output (-) terminal 2
    • Left rear speaker output (+) terminal 3
    • Right rear speaker output (+) terminal 4
    • Right front speaker output (+) terminal 9
    • Left front speaker output (-) terminal 10
    • Right front speaker output (-) terminal 11
    • Left front speaker output (+) terminal 12
    • If greater than the specified range, test the output circuit for a short to voltage. If the circuit tests normal, replace the radio.
    • If less than the specified range, test the output circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
  4. Ignition OFF, connect the X3 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 inoperative speaker output positive (+) circuit and ground.
    • If greater than the specified range, test the output circuit for a short to voltage. If the circuit tests normal, replace the audio amplifier.
    • If less than the specified range, test the output 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 inoperative speaker output negative (-) circuit and ground.
    • If greater than the specified range, test the output circuit for a short to voltage. If the circuit tests normal, replace the audio amplifier.
    • If less than the specified range, test the output 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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