Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: OnStar Schematics DEFINITION: The OnStar® operator will advise the caller that they are unable to configure the OnStar® system as requested. | ||||
1 | Did you perform the Cellular Communication Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the OnStar® operator advise the caller the OnStar® system cannot be configured? | -- | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
3 | Test the ignition 1 voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 4 |
4 |
Does the voltage measure near the specified value? | 12 V | Go to Step 6 | Go to Step 5 |
5 | Test the ignition ON signal circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 7 |
6 | Inspect for poor connections at the harness connector of the VCU. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 8 |
7 | Inspect for poor connections at the harness connector of the Vehicle Interface Unit (VIU). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 9 |
8 |
Important: Perform the OnStar® setup procedure. Replace the VCU. Refer to OnStar Vehicle Communication Unit Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
9 |
Important: Perform the OnStar® setup procedure. Replace the VIU. Refer to OnStar Vehicle Interface Unit Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
10 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
