LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2009 >> Allure CX >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Cellular System, Entertainment System & Navigation System >> Diagnostic Information and Procedures >> Speaker Malfunction >> Circuit/System Testing

Circuit/System Testing

Speaker Circuit Malfunction - without Amplifier

  1. Ignition OFF, disconnect the harness connector at the appropriate speaker.
  2. Radio ON, test for 5.0-7.5 volts between each signal circuit terminal A and terminal B 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.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
  3. If all circuits test normal, replace the speaker.

Amplifier Circuit Malfunction

  1. Ignition OFF, disconnect the X1 harness connector at the amplifier.
  2. Test for less than 10 Ω between the ground circuit terminal 2 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Test for B+ between the battery voltage circuit terminal 1 and ground.
    • If less than the specified value, test the circuit for a short to ground or an open/high resistance.
  4. Disconnect the X3 harness connector at the amplifier.
  5. Radio ON, test for B+ between the signal circuit terminal 6 and ground.
    • 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.
  6. Test for B+ between the signal circuit terminal 5 and ground.
    • 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 amplifier.

Speaker Circuit Malfunction - with Amplifier

  1. Ignition OFF, disconnect the X3 connector at the amplifier.
  2. 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 X3
    • Left front low level audio signal (-) - terminal 2 X3
    • Right front low level audio signal (+) - terminal 10 X3
    • Right front low level audio signal (-) - terminal 9 X3
    • Left rear low level audio signal (+) - terminal 4 X3
    • Left rear low level audio signal (-) - terminal 3 X3
    • Right rear low level audio signal (+) - terminal 11 X3
    • Right rear low level audio signal (-) - terminal 12 X3
    • 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.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
  3. Ignition OFF, disconnect the X1 and X2 harness connectors at the amplifier.
  4. Ignition ON, test for less than 1 volt between each of the signal circuit terminals listed below and ground.
    • front center speaker output (-) - terminal 4 X1
    • front center speaker output (+) - terminal 3 X1
    • Left front tweeter speaker output (-) - terminal 2 X2
    • Left front tweeter speaker output (+) - terminal 1 X2
    • Right front tweeter speaker output (-) - terminal 4 X2
    • Right front tweeter speaker output (-) - terminal 3 X2
    • Left front speaker output (-) - terminal 16 X2
    • Left front speaker output (+) - terminal 15 X2
    • Right front speaker output (-) - terminal 14 X2
    • Right front speaker output (+) - terminal 13 X2
    • Left rear speaker output (-) - terminal 5 X2
    • Left rear speaker output (+) - terminal 6 X2
    • Right rear speaker output (-) - terminal 7 X2
    • Right rear speaker output (+) - terminal 8 X2
    • subwoofer speaker output (-) - terminal 7 X1
    • subwoofer speaker output (+) - terminal 8 X1
    • If greater than the specified range, test both signal circuits of the affected speaker for a short to voltage.
  5. Ignition OFF, test for infinite resistance between each of the signal circuit terminals listed below and ground.
    • front center speaker output (-) - terminal 4 X1
    • front center speaker output (+) - terminal 3 X1
    • Left front tweeter speaker output (-) - terminal 2 X2
    • Left front tweeter speaker output (+) - terminal 1 X2
    • Right front tweeter speaker output (-) - terminal 4 X2
    • Right front tweeter speaker output (-) - terminal 3 X2
    • Left front speaker output (-) - terminal 16 X2
    • Left front speaker output (+) - terminal 15 X2
    • Right front speaker output (-) - terminal 14 X2
    • Right front speaker output (+) - terminal 13 X2
    • Left rear speaker output (-) - terminal 5 X2
    • Left rear speaker output (+) - terminal 6 X2
    • Right rear speaker output (-) - terminal 7 X2
    • Right rear speaker output (+) - terminal 8 X2
    • subwoofer speaker output (-) - terminal 7 X1
    • subwoofer speaker output (+) - terminal 8 X1
    • If less than the specified value, test both signal circuits of the affected speaker for a short to ground.
  6. Ignition OFF, reconnect all harness connectors at the amplifier. Disconnect the harness connector at the appropriate speaker.
  7. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminals listed below and ground.
    • Front center speaker - terminal A and B
    • Front door speakers - terminal A and B
    • Front tweeter speakers - terminal A and B
    • Rear speakers - terminal A and B
    • Rear subwoofer - terminal C and D
    • If less than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the amplifier.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the amplifier.
  8. If all circuits test normal, replace the speaker.
scientia non olet · About LEMON Manuals