For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit/System Description
The radio generates the audible warning through the speakers. The radio receives audible warning requests via GMLAN serial data from the instrument panel cluster (IPC) or the body control module (BCM).
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
Circuit/System Testing
Important: Before performing this diagnostics, make sure no indicator(s) or DIC message(s) are illuminated after the IPC performs the displays test. If any indicator(s) or DIC message(s) are illuminated after the displays test, perform the indicator or DIC message diagnostics before this diagnostic.
Ignition ON, radio ON, adjust the radio balance and fade to the left front speaker.
| ⇒ | If the speaker does not operate properly, refer to Speakers Inoperative - One or More . |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
