Radio/Audio System Diagnostic System Check
WARNING: This page is about a different car, the 2002 Pontiac Grand Am and 2002 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The presence of DTCs which begin with "U" indicate some other module on Class 2 serial data line is not communicating.
- Connect scan tool to Data Link Connector (DLC). DLC is located under driver side of instrument panel. If scan tool powers up, go to next step. If scan tool does not power up, go to TEST A: SCAN TOOL DOES NOT POWER UP under SYSTEM TESTS.
- Turn ignition switch to RUN position. Attempt to establish communication with radio. If scan tool communicates with radio, go to next step. If scan tool does not communicate with radio, go to TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS.
- Using scan tool, select DISPLAY DTCS function and retrieve any radio DTCs. If scan tool displays any DTCs, go to next step. If scan tool does not display any DTCs, repair audio system as necessary.
- If scan tool does not display any DTCs which begin with a "U", go to next step. If scan tool displays any DTCs which begin with a "U", go to TEST B: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS.
- If scan tool does not display DTCs B1000 or B1009, go to next step. If scan tool displays DTCs B1000 or B1009, go to DTC B1000: BODY CONTROL MODULE MALFUNCTION or DTC B1009: EEPROM CHECK SUM ERROR .
- If scan tool does not display DTCs B1001, DTC B1025 or B1780, diagnose radio by symptom and repair as necessary. If scan tool displays DTCs B1001, DTC B1025 or B1780, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .