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Home >> Saturn >> 2009 >> Sky Red Line, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 87 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information & Procedures >> Speaker Malfunction >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2008 Saturn Sky and 2008 Pontiac Solstice. However, it is still accessible from the selected car via links, so may be relevant.

Speaker Circuit Malfunction - without Amplifier

  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 harness connector at the appropriate speaker.
  3. 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 radio.
    • 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 radio.
  4. Test for 5.0-7.5 volts between the signal circuit terminal B and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
    • 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 radio.
  5. If all circuits test normal, replace the speaker.

Amplifier Circuit Malfunction

  1. Ignition OFF, disconnect the X1 harness connector at the audio amplifier.
  2. Ignition OFF, test for less than 10 ohms between the ground circuit terminal 2 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the circuit fuse is open, replace the audio amplifier.
  4. Disconnect the X3 harness connector at the audio amplifier.
  5. Radio ON, test for B+ between the signal circuit terminal 6 and ground.
    • 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 radio.
  6. Test for 0.6-1.0 volt between the amplifier mute signal circuit terminal 16 and ground.
    • If greater than the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
    • If less than the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
  7. If all circuits test normal, replace the audio amplifier.

Speaker Circuit Malfunction- with Amplifier

  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 signal circuit terminal listed below and ground.
    • Left front low level audio signal (+) terminal 1
    • Left front low level audio signal (-) terminal 2
    • Right front low level audio signal (+) terminal 10
    • Right front low level audio signal (-) terminal 9
    • If greater than the specified range, test the appropriate signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
    • If less than the specified range, test the appropriate signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
  4. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
    • Left rear low level audio signal (+) terminal 4
    • Left rear low level audio signal (-) terminal 3
    • Right rear low level audio signal (+) terminal 11
    • Right rear low level audio signal (-) terminal 12
    • If greater than the specified range, test the appropriate signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
    • If less than the specified range, test the appropriate signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
  5. Ignition OFF, connect the X3 harness connector at the audio amplifier.
  6. Disconnect the harness connector at the inoperative speaker.
  7. Radio ON, test for 5.0-7.5 volts between the signal circuit (+) terminal 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. Test for 5.0-7.5 volts between the signal circuit (+) terminal 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.
  9. If all circuits test normal, replace the inoperative speaker.
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