Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: OnStar Schematics DEFINITION: One or all buttons on the OnStar® button assembly are inoperative. | ||||
1 | Did you perform the Cellular Communication Diagnostic System Check? | Go to Step 2 | ||
2 |
Important: Contact the OnStar® call center first before pressing the emergency button in order to notify them of the impending test.
Are all buttons inoperative? | -- | Go to Step 4 | Go to Step 3 |
3 | Are any buttons intermittent or inoperative? | -- | Go to Step 7 | Go to Testing for Intermittent Conditions and Poor Connections |
4 |
Does the voltage measure greater than the specified value? | 9 V | Go to Step 6 | Go to Step 5 |
5 | Test the keypad supply voltage circuit for an open or short. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the conditon? | Go to Step 11 | Go to Step 8 | |
6 | Test the keypad signal circuit for an open or short . Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 9 | |
7 | Inspect for poor connections at the harness connector of the OnStar® button assembly. 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 11 | Go to Step 9 |
8 | Inspect for poor connections at the harness connector of the 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 11 | Go to Step 10 |
9 | Replace the OnStar® button assembly. Refer to OnStar Button Assembly Replacement . Did you complete the replacement? | -- | Go to Step 11 | -- |
10 |
Important: Perform the OnStar® setup procedure. Replace the VIU. Refer to OnStar Vehicle Interface Unit Replacement . Did you complete the replacement? | -- | Go to Step 11 | -- |
11 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
