Test Description
The number below refers to the step number on the diagnostic table.
- 2: This step checks that the VCIM is sending out the proper supply voltage.
DTC B2476
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: OnStar Schematics Connector End View Reference: Entertainment/Communication Connector End Views |
||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
|
9 V | Go to Step 4 | Go to Step 3 |
| 3 | Test the keypad supply voltage circuit for an open or short to ground. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 11 | Go to Step 8 |
| 4 | Test the keypad supply voltage circuit for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 11 | Go to Step 5 |
| 5 | Test the keypad ground circuit for an open. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 11 | Go to Step 6 |
| 6 | Test the keypad signal circuit for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
- | Go to Step 11 | Go to Step 7 |
| 7 | Inspect for poor connections at the harness connector of the rearview mirror. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. 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 vehicle communication interface module (VCIM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 11 | Go to Step 10 |
| 9 | Replace the rearview mirror. Refer to Rearview Mirror Replacement
. Did you complete the replacement? |
- | Go to Step 11 | - |
| 10 | Replace the VCIM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
- | Go to Step 11 | - |
| 11 |
|
- | Go to Step 2 | System OK |