Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the OnStar® Diagnostic System Check? | -- | Go to Step 2 | Go to OnStar System Check |
2 | Did you verify proper operation of the Audio System? | -- | Go to Step 3 | |
3 | Activate the OnStar® Center Call button. Does the radio Mute? | -- | Go to Step 4 | Go to Step 10 |
4 | Does "Connecting to OnStar®" play through the audio system? | -- | Go to Step 5 | Go to Step 7 |
5 | Does "Connecting to OnStar®" play through only the Right speaker of the audio system? | -- | Go to Step 8 | Go to Step 12 |
6 | Does "Connecting to OnStar®" play through only the Left speaker of the audio system? | -- | Go to Step 9 | Go to Step 12 |
7 | Test the Remote Radio Audio Output (-) circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the problem? | -- | Go to Step 12 | Go to Step 11 |
8 | Test the Remote Radio Right Audio Signal circuit for short to ground, an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the problem? | -- | Go to Step 12 | Go to Step 11 |
9 | Test the Remote Radio Left Audio Signal circuit for short to ground, an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the problem? | -- | Go to Step 12 | Go to Step 11 |
10 | Test the Entertainment and Comfort Serial Bus circuit for an open, high resistance or a short. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 11 |
11 | Replace the VIU. Refer to Vehicle Interface Unit and Vehicle Communication Unit Modules Replacement in Cellular Communications. Did you complete the repair? | -- | Go to Step 12 | -- |
12 | Operate the system in order to verify the repair. Did you find and correct the condition? | -- | System OK | Go to Step 2 |
