No (or Noisy) OnStar Audio
No (or Noisy) OnStar Audio
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: OnStar Schematics | |||
| 1 | Did you perform the OnStar® Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Cellular Communication |
| 2 |
|
Go to Step 11 | Go to Step 3 |
| 3 | Tune the radio to a known good station. Can the audio be heard through all speaker channels? |
Go to Step 4 | Refer to DIAGNOSTIC STARTING POINT - ENTERTAINMENT |
| 4 | Does the audio system mute? | Go to Step 6 | Go to Step 5 |
| 5 | Test the entertainment and comfort serial data circuit for an open or a short. Refer to CIRCUIT TESTING
and WIRING REPAIRS
. Did you find and correct the condition? |
Go to Step 11 | Go to Step 8 |
| 6 | Test the remote playback device audio common signal circuit for short, an open or high resistance. Refer to CIRCUIT TESTING
and WIRING REPAIRS
. Did you find and correct the condition? |
Go to Step 11 | Go to Step 7 |
| 7 | Test the remote playback device 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 condition? |
Go to Step 11 | Go to Step 8 |
| 8 | Test the remote playback device 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 condition? |
Go to Step 11 | Go to Step 9 |
| 9 | Inspect for poor connections at the harness connector of the vehicle interface unit (VIU). Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS
and CONNECTOR REPAIRS
. Did you find and correct the condition? |
Go to Step 11 | Go to Step 10 |
| 10 |
IMPORTANT:
Perform the OnStar® setup procedure. Replace the VIU. Refer to OnStar Vehicle Interface Unit (VIU) Replacement .Did you complete the repair? |
Go to Step 11 | - |
| 11 | Operate the system in order to verify the repair. Did you find and correct the condition? |
System OK | - |