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 left front speaker. The radio receives audible warning requests via GMLAN serial data from the body control module (BCM).
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
Circuit/System Testing
- Ignition OFF, key in the ignition, open the driver door. The courtesy lamps should illuminate.
- Ignition ON, radio ON, adjust the radio balance and fade to the left front speaker.
- If the speaker operates properly, replace the BCM.
| ⇒ | If the courtesy lamps do not illuminate, refer to Courtesy Lamps Inoperative . |
| ⇒ | 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.
Control Module References for radio replacement, setup, and programming
