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Circuit/System Testing

WARNING: This page is about a different car, the 2008 Saturn Vue. 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 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 ohms of resistance between the ground circuit terminal 5 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 4 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. 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 5 X3
    • Left front low level audio signal (-) - terminal 13 X3
    • Right front low level audio signal (+) - terminal 6 X3
    • Right front low level audio signal (-) - terminal 14 X3
    • Left rear low level audio signal (+) - terminal 7 X3
    • Left rear low level audio signal (-) - terminal 15 X3
    • Right rear low level audio signal (+) - terminal 8 X3
    • Right rear low level audio signal (-) - terminal 16 X3
    • 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.
  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.
    • Left Front Speaker Output(+) - terminal 1 X2
    • Left Front Speaker Output (-) - terminal 9 X2
    • Right Front Speaker Output(+) - terminal 2 X2
    • Right Front Speaker Output (-) - terminal 10 X2
    • Left Rear Speaker Output (+) - terminal 3 X2
    • Left Rear Speaker Output (-) - terminal 11 X2
    • Right Rear Speaker Output (+) - terminal 4 X2
    • Right Rear Speaker Output (-) - terminal 12 X2
    • Front Center Speaker Output (+) - terminal 5 X2
    • Front Center Speaker Output(-) - terminal 13 X2
    • Left or Rear Subwoofer Output (+) - terminal 3 X1
    • Left or Rear Subwoofer Output (-) - terminal 7 X1
    • Right Subwoofer Output (+) - terminal 4 X1
    • Right Subwoofer 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.
    • Left Front Speaker Output(+) - terminal 1 X2
    • Left Front Speaker Output (-) - terminal 9 X2
    • Right Front Speaker Output(+) - terminal 2 X2
    • Right Front Speaker Output (-) - terminal 10 X2
    • Left Rear Speaker Output (+) - terminal 3 X2
    • Left Rear Speaker Output (-) - terminal 11 X2
    • Right Rear Speaker Output (+) - terminal 4 X2
    • Right Rear Speaker Output (-) - terminal 12 X2
    • Front Center Speaker Output (+) - terminal 5 X2
    • Front Center Speaker Output(-) - terminal 13 X2
    • Left or Rear Subwoofer Output (+) - terminal 3 X1
    • Left or Rear Subwoofer Output (-) - terminal 7 X1
    • Right Subwoofer Output (+) - terminal 4 X1
    • Right Subwoofer Output (-) - terminal 8 X1
    • If less than the specified range, 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.
    • Center speaker- terminal A and B
    • Front door speakers - terminal A and B
    • Front tweeters - terminal A and B
    • Rear Doors- terminal A and B
    • Rear tweeters - terminal A and B
    • Rear subwoofers - terminals A, B, 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.
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