OnStar / B2455 04
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Can dial out. You cannot be heard, but the other party can be heard.
Microphone Circuit Malfunction
Fault symptom
Can dial out. You cannot be heard, but the other party can be heard.
On-board diagnosis
Enable criteria:
| Battery voltage must be between 9 - 16 V. |
Fault criteria:
Checking the wiring harness
Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.
Diagnostic help
Electrical fault in connecting leads or component.
