OnStar Button LED Malfunction F1
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
Determines if the OnStar® status LED has the necessary Green LED signal circuit voltage.
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If the Geen LED signal is shorted to voltage then the OnStar® three button assembly has been damaged and the OnStar® three button assembly must be replaced.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: OnStar Schematics DEFINITION: This procedure is for diagnosing problems with the OnStar® button assembly LED. | ||||
1 | Did you perform the Cellular Communications Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Did the OnStar® status LED turn GREEN? | -- | Go to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems | Go to Step 3 |
Measure the voltage from the Keypad Greeen LED Signal circuit to a good ground. Does the voltage measure near the specified value? | 7 V | Go to Step 6 | Go to Step 4 | |
4 | Test the Keypad Green LED Signal circuit for an open, high resistance or a 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 5 |
Test the Keypad Green LED Signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 7 | Go to Step 8 | |
6 | Inspect for poor connections at the harness connector of the rear view mirror. 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 7 |
7 | Replace the rear view mirror. Refer to Inside Rearview Mirror Replacement in Stationary Windows. Did you complete the repair? | -- | Go to Step 10 | -- |
8 | Inspect for poor connections at the harness connector of the Vehicle Communication Interface Module. 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 |
9 |
Important: Perform the OnStar® setup procedure. Replace the Vehicle Communication Interface Module. Refer to Communication Interface Module Replacement . Did you complete the repair? | -- | 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 |
OnStar Button LED Malfunction 2.6
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
Determines if the OnStar® status LED has the necessary GRN LED signal circuit.
-
If the GRN LED signal is shorted to voltage then the OnStar® three button assembly has been damaged. The OnStar® three button assembly has to be replaced.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: OnStar Schematics DEFINITION: This procedure is for diagnosing problems with the OnStar® button assembly. The following numbers refer to the steps in the table. | ||||
1 | Did you perform the Cellular Communications Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Did the OnStar® status LED turn GREEN? | -- | Go to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems | Go to Step 3 |
Does the voltage measure near the specified value? | 7-9 V | Go to Step 6 | Go to Step 4 | |
4 | Test the keypad GRN LED signal circuit for an open, high resistance or a 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 5 |
Test the keypad GRN LED signal circuit for an short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 7 | Go to Step 8 | |
6 | Inspect for poor connections at the harness connector of the Rear view Mirror. 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 7 |
7 | Replace the rear view mirror. Refer to Inside Rearview Mirror Replacement in Stationary Windows. Did you complete the repair? | -- | Go to Step 10 | -- |
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 10 | Go to Step 9 |
9 |
Important: Perform the OnStar® setup procedure. Replace the vehicle interface unit (VIU). Refer to OnStar Vehicle Interface Unit Replacement . Did you complete the repair? | -- | 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 |
