Step | Action | Value | Yes | No |
|---|---|---|---|---|
Schematic Reference: Radio/Audio System Schematics Connector Reference: Entertainment Connector End Views | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |
2 |
Is a difference in volume heard? | -- | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 |
Does the voltage measure near the specified value? | 8 V | Go to Step 4 | Go to Step 5 |
4 | Replace the Onstar microphone. Refer to Mobile Telephone Microphone Replacement . Did you complete the replacement? | -- | Go to Step 9 | -- |
5 | Test the noise compensation microphone supply voltage circuit for an open or short. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 6 |
6 | Test the drain wire circuit for an open or short. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 7 |
7 | Inspect for poor connections at the amplifier. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 8 |
8 | Replace the amplifier. Refer to Control Module References . Did you complete the repair? | -- | Go to Step 9 | -- |
9 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
