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Circuit/System Testing

Speaker Circuit Malfunction - without Amplifier

  1. Disconnect the harness connector at the appropriate speaker.
  2. Radio ON, test for 5.0-7.5V between the signal circuit terminal A 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. Test for 5.0-7.5V between the signal circuit 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.
  4. 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 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. Ignition ON, test for B+ between the B+ circuit terminal 4 and ground.
    • If less then the specified value, test the B+ circuit for a short to ground or an open/high resistance.
  4. Radio ON, test for B+ between the amplifier enable signal circuit terminal 3 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.
  5. Test for 0.6-1.0V between the amplifier mute signal circuit terminal 7 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.
  6. If all circuits test normal, replace the audio amplifier.

Speaker Circuit Malfunction - With Amplifier - Radio Output Testing

  1. Ignition OFF, disconnect the harness connector at the rear seat audio (RSA) controller.
  2. Radio ON, test for 5.0-7.5V between the appropriate signal circuit terminal listed below and ground.
    • Left rear low level audio signal (+) terminal A4
    • Left rear low level audio signal (-) terminal A3
    • Right rear low level audio signal (+) terminal A2
    • Right rear low level audio signal (-) terminal A1
    • 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.
    • If greater than the specified range, test the appropriate signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
  3. Ignition OFF, reconnect the harness connector at the rear seat audio (RSA) controller.
  4. Disconnect the X3 harness connector at the audio amplifier.
  5. Radio ON, test for 5.0-7.5V between the appropriate signal circuit terminal listed below and ground.
    • 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 appropriate signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the rear seat audio (RSA) controller.
    • If greater than the specified range, test the appropriate signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA) controller.
  6. Radio ON, test for 5.0-7.5V 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 9
    • Right front low level audio signal (+) terminal 2
    • Right front low level audio signal (-) terminal 10
    • 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.
    • If greater than the specified range, test the appropriate signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
  7. If all circuits test normal, replace the audio amplifier.

Speaker Circuit Malfunction - With Amplifier - Amplifier Output Testing

  1. Ignition OFF, disconnect the X2 harness connector at the amplifier.
  2. Ignition ON, test for less than 1V between the terminals listed below and ground:
    • Left front speaker output (+) - terminal 2
    • Left front speaker output (-) - terminal 10
    • Right front speaker output (+) - terminal 6
    • Right front low speaker output (-) - terminal 14
    • Left rear speaker output (+) - terminal 3
    • Left rear speaker output (-) - terminal 11
    • Right rear speaker output (+) - terminal 7
    • Right rear speaker output (-) - terminal 15
    • Left rear subwoofer speaker output (+) - terminal 4
    • Left rear subwoofer speaker output (-) - terminal 12
    • Right rear subwoofer speaker output (+) - terminal 8
    • Right rear subwoofer speaker output (-) - terminal 16
    • If greater than specified range, test both circuits of the affected speaker for a short to voltage.
  3. Ignition OFF, test for infinite resistance between the terminals listed below and ground:
    • Left front speaker output (+) - terminal 2
    • Left front speaker output (-) - terminal 10
    • Right front speaker output (+) - terminal 6
    • Right front low speaker output (-) - terminal 14
    • Left rear speaker output (+) - terminal 3
    • Left rear speaker output (-) - terminal 11
    • Right rear speaker output (+) - terminal 7
    • Right rear speaker output (-) - terminal 15
    • Left rear subwoofer speaker output (+) - terminal 4
    • Left rear subwoofer speaker output (-) - terminal 12
    • Right rear subwoofer speaker output (+) - terminal 8
    • Right rear subwoofer speaker output (-) - terminal 16
    • If less than specified value, test both circuits of the affected speaker for a short to ground
  4. If all circuits test normal, reconnect all harness connectors at the amplifier.
  5. Ignition ON, radio ON, disconnect the appropriate speaker.
  6. Test for 5.0-7.5V between the signal circuit terminals and ground.
    • If less then the specified range, test the circuit for an open/high resistance. If the circuit tests normal, replace the amplifier.
    • If greater then the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the amplifier.
  7. If the circuit tests normal, replace the appropriate speaker.
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