For 1990-2009 cars only
Audio Distortion - One or More Speakers for GMC Truck Acadia - 2WD 2007
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Reference Information
Schematic Reference
Radio/Navigation System Schematics
Connector End View Reference
Entertainment/Communication Connector End Views
Electrical Information Reference
Scan Tool Reference
Special Tools Required
J 39916-A CD Diagnostic Audio Kit
Circuit/System Testing
Without Amplifier
Ignition ON and radio ON. Adjust the fade and balance controls to mid range and insert the CD from the J 39916-A to identify the suspect speaker.
| ⇒ | Replace suspect speaker if distortion is found. |
With Amplifier
- Ignition ON and radio ON. Adjust the fade and balance controls to mid range and insert the CD from the J 39916-A to identify the suspect speaker.
- Ignition OFF, Disconnect the suspect amplifier harness connector.
- Test for less than 1 volt at the amplifier connector suspect speaker high and speaker low terminals
- Test for greater than 1 ohm between the amplifier connector suspect speaker high and speaker low terminals and ground.
- If all circuits test normal, replace the suspect speaker.
| ⇒ | If greater than specified value, repair short to voltage. |
| ⇒ | If less than specified value, repair short to ground. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
