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Circuit/System Testing

WARNING: This page is about a different car, the 2017 GMC Acadia Limited, 2017 Chevrolet Traverse, and 2017 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

Speaker Circuit Malfunction - without Amplifier without ULD

  1. Ignition OFF, disconnect the harness connector at the appropriate speaker.
  2. Ignition ON, radio ON, test for 5.0 - 7.5 V 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.
  3. Test for 5.0 - 7.5 V 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.
  4. If all circuits test normal, replace the speaker.

Speaker Circuit Malfunction - without Amplifier with ULD

  1. Ignition OFF, disconnect the X2 harness connector at the Auxiliary Radio/HVAC Control.
  2. Ignition ON, radio ON, test for 5.0 - 7.5 V between the appropriate signal circuit terminal listed below and ground.
    • Left Rear Low Level Audio Signal (+) terminal 1
    • Left Rear Low Level Audio Signal (-) terminal 2
    • Right Rear Low Level Audio Signal (+) terminal 3
    • Right Rear Low Level Audio Signal (-) terminal 4
    • 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, reconnect the X2 harness connector at the Auxiliary Radio/HVAC Control. Disconnect the harness connector at the appropriate speaker.
  4. Ignition ON, radio ON, test for 5.0 - 7.5 V 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 for front speaker circuits, replace the radio; for rear speaker circuits, replace the auxiliary radio/HVAC control.
    • 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 for front speaker circuits, replace the radio; for rear speaker circuits, replace the auxiliary radio/HVAC control.
  5. Test for 5.0 - 7.5 V 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 for front speaker circuits, replace the radio; for rear speaker circuits, replace the auxiliary radio/HVAC control.
    • 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 for front speaker circuits, replace the radio; for rear speaker circuits, replace the auxiliary radio/HVAC control.
  6. 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 appropriate ground circuit terminal listed below and ground.
    • terminal 5 (UQG)
    • terminal 8 (UQA/ UQS)
    • 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 appropriate B+ circuit terminal listed below and ground.
    • terminal 1 (UQG)
    • terminal 4 (UQA/ UQS)
    • 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, replace the audio amplifier.
  4. Ignition OFF, disconnect the X3 harness connector at the audio amplifier.
  5. Ignition ON, Radio ON, test for B+ between the appropriate entertainment remote enable signal circuit terminal listed below and ground.
    • terminal 12 (UQG)
    • terminal 8 (UQA/UQS)
    • 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. Mute OFF, test for less than 1.0 V between the appropriate mute signal circuit terminal listed below and ground.
    • terminal 4 (UQG)
    • terminal 11 (UQA or UQS)
    • If greater than the specified range, test the 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 UQG without ULD

  1. Ignition OFF, disconnect the X3 harness connector at the audio amplifier.
  2. Radio ON, test for 5.0 - 7.5 V between the appropriate signal circuit terminal listed below and ground.
    • Left front low level audio signal (+) - terminal 5
    • Left front low level audio signal (-) - terminal 13
    • Right front low level audio signal (+) - terminal 6
    • Right front low level audio signal (-) - terminal 14
    • Left rear low level audio signal (+) - terminal 7
    • Left rear low level audio signal (-) - terminal 15
    • Right rear low level audio signal (+) - terminal 8
    • Right rear low level audio signal (-) - terminal 16
    • 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.
  3. Ignition OFF, disconnect the X1 and X2 harness connectors at the amplifier.
  4. Ignition ON, test for less than 1 V between each of the signal circuit terminals listed below and ground.
    • Left subwoofer speaker output (+) - terminal 3 X1
    • Left subwoofer speaker output (-) - terminal 7 X1
    • Right subwoofer speaker output (+) - terminal 4 X1
    • Right subwoofer speaker output (-) - terminal 8 X1
    • 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
    • Rear compartment speaker output (+) - terminal 6 X2
    • Rear compartment speaker output (-) - terminal 14 X2
      • 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 subwoofer speaker output (+) - terminal 3 X1
    • Left subwoofer speaker output (-) - terminal 7 X1
    • Right subwoofer speaker output (+) - terminal 4 X1
    • Right subwoofer speaker output (-) - terminal 8 X1
    • 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
    • Rear compartment speaker output (+) - terminal 6 X2
    • Rear compartment speaker output (-) - terminal 14 X2
    • If less than the specified value, test both signal circuits of the affected speaker for a short to ground.
  6. Reconnect all harness connectors at the amplifier. Disconnect the harness connector at the appropriate speaker.
  7. Radio ON, test for 5.0 - 7.5 V between each of the appropriate signal circuit terminals listed below and ground.
    • Front A pillar speakers - terminals A and B
    • Center IP speaker- terminals A and B
    • Door speakers - terminals A and B
    • Rear compartment speakers- terminals A and B
    • Subwoofer speaker assembly- terminals A, B, C, and D
    • 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.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the audio amplifier.
  8. If all circuits test normal, replace the speaker.

Speaker Circuit Malfunction - with Amplifier UQA/UQS without ULD

  1. Ignition OFF, disconnect the X3 harness connector at the audio amplifier.
  2. Radio ON, test for 5.0 - 7.5 V between the appropriate signal circuit terminal listed below and ground.
    • Center channel low level audio signal (+) - terminal 3
    • Center channel low level audio signal (+) - terminal 2
    • Left front low level audio signal (+) - terminal 15
    • Left front low level audio signal (-) - terminal 7
    • Right front low level audio signal (+) - terminal 14
    • Right front low level audio signal (-) - terminal 6
    • Left rear low level audio signal (+) - terminal 13
    • Left rear low level audio signal (-) - terminal 5
    • Right rear low level audio signal (+) - terminal 12
    • Right rear low level audio signal (-) - terminal 4
    • Subwoofer low level audio signal (+) - terminal 1
    • Subwoofer low level audio signal (+) - terminal 9
    • 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 V between each of the signal circuit terminals listed below and ground.
    • Left front speaker output (+) - terminal 5 X1
    • Left front speaker output (-) - terminal 1 X1
    • Right front speaker output (+) - terminal 8 X2
    • Right front speaker output (-) - terminal 7 X2
    • Left rear speaker output (+) - terminal 15 X2
    • Left rear speaker output (-) - terminal 16 X2
    • Right rear speaker output (+) - terminal 2 X2
    • Right rear speaker output (-) - terminal 1 X2
    • Front center speaker output (+) - terminal 4 X2
    • Front center speaker output (-) - terminal 3 X2
    • Rear compartment speaker output (+) - terminal 6 X2
    • Rear compartment speaker output (-) - terminal 5 X2
    • Subwoofer speaker output (+) - terminal 7 X1
    • Subwoofer speaker output (-) - terminal 3 X1
    • If greater than the specified value, 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 5 X1
    • Left front speaker output (-) - terminal 1 X1
    • Right front speaker output (+) - terminal 8 X2
    • Right front speaker output (-) - terminal 7 X2
    • Left rear speaker output (+) - terminal 15 X2
    • Left rear speaker output (-) - terminal 16 X2
    • Right rear speaker output (+) - terminal 2 X2
    • Right rear speaker output (-) - terminal 1 X2
    • Front center speaker output (+) - terminal 4 X2
    • Front center speaker output (-) - terminal 3 X2
    • Rear compartment speaker output (+) - terminal 6 X2
    • Rear compartment speaker output (-) - terminal 5 X2
    • Subwoofer speaker output (+) - terminal 7 X1
    • Subwoofer speaker output (-) - terminal 3 X1
    • If less than the specified value, test both signal circuits of the affected speaker for a short to ground.
  6. Reconnect all harness connectors at the amplifier. Disconnect the harness connector at the appropriate speaker.
  7. Radio ON, test for 5.0 - 7.5 V between each of the appropriate signal circuit terminals listed below and ground.
    • Front A pillar speakers - terminals A and B
    • Center IP speaker- terminals A and B
    • Door speakers - terminals A and B
    • Rear compartment speakers- terminals A and B
    • Subwoofer speaker - terminals A and B
    • 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.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the audio amplifier.
  8. If all circuits test normal, replace the speaker.

Speaker Circuit Malfunction - with Amplifier UQG with ULD

  1. Ignition OFF, disconnect the X2 harness connector at the Auxiliary Radio/HVAC Control.
  2. Ignition ON, radio ON, test for 5.0 - 7.5 V between the appropriate signal circuit terminal listed below and ground.
    • Left Rear Low Level Audio Signal (+) - terminal 1
    • Left Rear Low Level Audio Signal (-) - terminal 2
    • Right Rear Low Level Audio Signal (+) - terminal 3
    • Right Rear Low Level Audio Signal (-) - terminal 4
    • 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, reconnect the X2 harness connector at the Auxiliary Radio/HVAC Control. Disconnect the X3 harness connector at the audio amplifier.
  4. Radio ON, test for 5.0 - 7.5 V between the appropriate signal circuit terminal listed below and ground.
    • Left rear low level audio signal (+) - terminal 7
    • Left rear low level audio signal (-) - terminal 15
    • Right rear low level audio signal (+) - terminal 8
    • Right rear low level audio signal (-) - terminal 16
    • 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 auxiliary radio/HVAC control.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the auxiliary radio/HVAC control.
  5. Test for 5.0 - 7.5 V between the appropriate signal circuit terminal listed below and ground.
    • Left front low level audio signal (+) terminal 5
    • Left front low level audio signal (-) terminal 13
    • Right front low level audio signal (+) terminal 6
    • Right front low level audio signal (-) terminal 14
    • 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. Ignition OFF, disconnect the X1 and X2 harness connectors at the amplifier.
  7. Ignition ON, test for less than 1 V between each of the signal circuit terminals listed below and ground.
    • Left subwoofer speaker output (+) - terminal 3 X1
    • Left subwoofer speaker output (-) - terminal 7 X1
    • Right subwoofer speaker output (+) - terminal 4 X1
    • Right subwoofer speaker output (-) - terminal 8 X1
    • 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
    • Rear compartment speaker output (+) - terminal 6 X2
    • Rear compartment speaker output (-) - terminal 14 X2
    • If greater than the specified value, test both signal circuits of the affected speaker for a short to voltage.
  8. Ignition OFF, test for infinite resistance between each of the signal circuit terminals listed below and ground.
    • Left subwoofer speaker output (+) - terminal 3 X1
    • Left subwoofer speaker output (-) - terminal 7 X1
    • Right subwoofer speaker output (+) - terminal 4 X1
    • Right subwoofer speaker output (-) - terminal 8 X1
    • 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
    • Rear compartment speaker output (+) - terminal 6 X2
    • Rear compartment speaker output (-) - terminal 14 X2
    • If less than the specified vallue, test both signal circuits of the affected speaker for a short to ground.
  9. Reconnect all harness connectors at the amplifier. Disconnect the harness connector at the appropriate speaker.
  10. Radio ON, test for 5.0 - 7.5 V between each of the appropriate signal circuit terminals listed below and ground.
    • Front A pillar speakers - terminals A and B
    • Center IP speaker- terminals A and B
    • Door speakers - terminals A and B
    • Rear compartment speakers- terminals A and B
    • Subwoofer speaker assembly- terminals A, B, C, and D
    • 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.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the audio amplifier.
  11. If all circuits test normal, replace the speaker.

Speaker Circuit Malfunction - with Amplifier UQA/UQS with ULD

  1. Ignition OFF, disconnect the X2 harness connector at the Auxiliary Radio/HVAC Control.
  2. Ignition ON, radio ON, test for 5.0 - 7.5 V between the appropriate signal circuit terminal listed below and ground.
    • Left Rear Low Level Audio Signal (+) terminal 1
    • Left Rear Low Level Audio Signal (-) terminal 2
    • Right Rear Low Level Audio Signal (+) terminal 3
    • Right Rear Low Level Audio Signal (-) terminal 4
    • 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, reconnect the X2 harness connector at the Auxiliary Radio/HVAC Control. Disconnect the X3 harness connector at the audio amplifier.
  4. Radio ON, test for 5.0 - 7.5 V between the appropriate signal circuit terminal listed below and ground.
    • Left rear low level audio signal (+) terminal 13
    • Left rear low level audio signal (-) terminal 5
    • Right rear low level audio signal (+) terminal 12
    • Right rear low level audio signal (-) terminal 4
    • 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 auxiliary radio/HVAC control.
    • If greater than the specified range, test the appropriate signal circuit for a short to voltage. If the circuit tests normal, replace the auxiliary radio/HVAC control.
  5. Radio ON, test for 5.0 - 7.5 V between the appropriate signal circuit terminal listed below and ground.
    • Center channel low level audio signal (+) - terminal 3
    • Center channel low level audio signal (+) - terminal 2
    • Left front low level audio signal (+) - terminal 15
    • Left front low level audio signal (-) - terminal 7
    • Right front low level audio signal (+) - terminal 14
    • Right front low level audio signal (-) - terminal 7
    • Subwoofer low level audio signal (+) - terminal 1
    • Subwoofer low level audio signal (+) - terminal 9
    • 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.
  6. Ignition OFF, disconnect the X1 and X2 harness connectors at the amplifier.
  7. Ignition ON, test for less than 1 V between each of the signal circuit terminals listed below and ground.
    • Left front speaker output (+) - terminal 5 X1
    • Left front speaker output (-) - terminal 1 X1
    • Right front speaker output (+) - terminal 8 X2
    • Right front speaker output (-) - terminal 7 X2
    • Left rear speaker output (+) - terminal 15 X2
    • Left rear speaker output (-) - terminal 16 X2
    • Right rear speaker output (+) - terminal 2 X2
    • Right rear speaker output (-) - terminal 1 X2
    • Front center speaker output (+) - terminal 4 X2
    • Front center speaker output (-) - terminal 3 X2
    • Rear compartment speaker output (+) - terminal 6 X2
    • Rear compartment speaker output (-) - terminal 5 X2
    • Subwoofer speaker output (+) - terminal 7 X1
    • Subwoofer speaker output (-) - terminal 3 X1
    • If greater than the specified value, test both signal circuits of the affected speaker for a short to voltage.
  8. Ignition OFF, test for infinite resistance between each of the signal circuit terminals listed below and ground.
    • Left front speaker output (+) - terminal 5 X1
    • Left front speaker output (-) - terminal 1 X1
    • Right front speaker output (+) - terminal 8 X2
    • Right front speaker output (-) - terminal 7 X2
    • Left rear speaker output (+) - terminal 15 X2
    • Left rear speaker output (-) - terminal 16 X2
    • Right rear speaker output (+) - terminal 2 X2
    • Right rear speaker output (-) - terminal 1 X2
    • Front center speaker output (+) - terminal 4 X2
    • Front center speaker output (-) - terminal 3 X2
    • Rear compartment speaker output (+) - terminal 6 X2
    • Rear compartment speaker output (-) - terminal 5 X2
    • Subwoofer speaker output (+) - terminal 7 X1
    • Subwoofer speaker output (-) - terminal 3 X1
    • If less than the specified value, test both signal circuits of the affected speaker for a short to ground.
  9. Reconnect all harness connectors at the amplifier. Disconnect the harness connector at the appropriate speaker.
  10. Radio ON, test for 5.0 - 7.5 V between each of the appropriate signal circuit terminals listed below and ground.
    • Front A pillar speakers - terminals A and B
    • Center IP speaker- terminals A and B
    • Door speakers - terminals A and B
    • Rear compartment speakers- terminals A and B
    • Subwoofer speaker - terminals A and B
    • 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.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the audio amplifier.
  11. If all circuits test normal, replace the speaker.
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