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Circuit/System Testing

WARNING: This page is about a different car, the 2011 Chevrolet Cruze. However, it is still accessible from the selected car via links, so may be relevant.

Speaker Circuit Malfunction - without Amplifier

  1. Ignition OFF, disconnect the harness connector at the appropriate P19 speaker.
  2. Radio ON, mute OFF, test for 5.0-7.5 V between each audio signal circuit terminal 1 and terminal 2 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 A11 radio.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the A11 radio.
    3. NOTE: In the following tests, audio signal frequencies (Hz) will be tested. To prevent misdiagnosis, the door chime must be OFF during testing. Ensure the driver door latch is closed during testing.
  3. Insert the audio test CD from the J 39916-A  CD and Cassette Diagnostic Audio Kit. See Special Tools .
  4. Play track number three (50 Hz bass test tone) from the test CD. Test for 49-51 Hz AC between each signal circuit terminal 1 and terminal 2 and ground.
    • If not the specified value, replace the A11 radio.
  5. If all circuits test normal, replace the P19 speaker.

Speaker Circuit malfunction- with Amplifier

  1. Ignition OFF, disconnect the X1 harness connector at the T3 audio amplifier.
  2. Test for less than 10 Ω between the ground circuit terminal 8 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Verify that a test lamp illuminates between the B+ circuit terminal 4 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Ignition ON, radio ON, verify a test lamp illuminates between the remote enable signal circuit terminal 3 and ground.
    • If the test lamp does not illuminate, test the remote enable signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the A11 radio.
  5. Mute OFF, test for less than 1 V between the amplifier control circuit terminal 7 and ground.
    • If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the A11 radio.
  6. Ignition OFF, disconnect the X3 harness connector at the T3 audio amplifier.
  7. Ignition ON, radio ON, test for 5.0-7.5 V between the audio signal circuit terminals listed below and ground.
    • Left front low level audio signal (+) terminal 1
    • Left front low level audio signal (-) terminal 9
    • Right front low level audio signal (+) terminal 2
    • Right front low level audio signal (-) terminal 10
    • Left rear low level audio signal (+) terminal 3
    • Left rear low level audio signal (-) terminal 11
    • Right rear low level audio signal (+) terminal 4
    • Right rear low level audio signal (-) terminal 12
    • 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 A11 radio.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the A11 radio.
    8. NOTE: In the following tests, audio signal frequencies (Hz) will be tested. To prevent misdiagnosis, the door chime must be OFF during testing. Ensure the driver door latch is closed during testing.
  8. Insert the audio test CD from the J 39916-A  CD and Cassette Diagnostic Audio Kit. See Special Tools .
  9. Mute OFF, play track number three (50 Hz bass test tone) from the test CD. Test for 49-51 Hz AC between the audio signal circuit terminals listed below and ground.
    • Left front low level audio signal (+) terminal 1
    • Left front low level audio signal (-) terminal 9
    • Right front low level audio signal (+) terminal 2
    • Right front low level audio signal (-) terminal 10
    • Left rear low level audio signal (+) terminal 3
    • Left rear low level audio signal (-) terminal 11
    • Right rear low level audio signal (+) terminal 4
    • Right rear low level audio signal (-) terminal 12
    • If not the specified value, replace the A11 radio.
  10. Ignition OFF, reconnect all harness connectors at the T3 audio amplifier.
  11. Disconnect the harness connector at the appropriate P19 speaker.
  12. Radio ON, mute OFF, test for 5.0-7.5 V between each audio signal circuit terminal 1 and terminal 2 and ground.
    • If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the T3 audio amplifier.
    • If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the T3 audio amplifier.
    13. NOTE: In the following tests, audio signal frequencies (Hz) will be tested. To prevent misdiagnosis, the door chime must be OFF during testing. Ensure the driver door latch is closed during testing.
  13. Play track number three (50 Hz bass test tone) from the test CD. Test for 49-51 Hz AC between each audio signal circuit terminal 1 and terminal 2 and ground.
    • If not the specified value, replace the T3 audio amplifier.
  14. If all circuits test normal, replace the appropriate P19 speaker.
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