Test Description
The numbers below refer to the step numbers on the diagnostic table.
- 2: This step tests the condition of the cellular antenna.
- 3: This step tests the condition of the cellular antenna coax and for proper ground of the cellular antenna.
DTC B2470
| Step | Action | Value | 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 | Inspect the cellular antenna and cellular antenna coupling assembly for damage. Is the antenna assembly damaged? |
- | Go to Step 7 | Go to Step 3 |
| 3 |
IMPORTANT:
The vehicle may be equipped with sectioned coax. Test each section and replace only the faulty section, not the entire length of coax.
|
- | Go to Step 4 | Go to Step 5 |
| 4 |
|
1 Ω | Go to Step 8 | Go to Step 6 |
| 5 | Inspect for poor connections at the harness connector of the VCIM. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 10 | Go to Step 9 |
| 6 | Inspect for poor connections at the harness connector of the cellular antenna. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
- | Go to Step 10 | Go to Step 7 |
| 7 | Replace the cellular antenna. Refer to Antenna Replacement - Cellular Communications/Digital Radio . Did you complete the replacement? |
- | Go to Step 10 | - |
| 8 | Replace the cellular antenna coax. Did you complete the replacement? |
- | Go to Step 10 | - |
| 9 | Replace the VCIM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
- | Go to Step 10 | - |
| 10 |
|
- | Go to Step 2 | System OK |