Amplifier Circuit Malfunction
WARNING: This page is about a different car, the 2009 Saturn Outlook, 2009 GMC Acadia, 2009 Chevrolet Traverse, and 2009 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the X1 harness connector at the audio amplifier.
- 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.
- 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.
- Ignition OFF, disconnect the X3 harness connector at the audio amplifier.
- 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.
- Test for 0.5-1.0 V between the appropriate mute signal circuit terminal listed below and ground.
- terminal 4 (UQG)
- terminal 11 (UQA or 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.
- If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
- If all circuits test normal, replace the audio amplifier.