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 in Wiring Systems. 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 in Wiring Systems. 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 in Wiring Systems. 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 in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 11 |
11 | Replace the vehicle interface unit (VIU). Refer to OnStar Vehicle Interface Unit Replacement . 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 |
