Remote Keyless Entry 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 RCDLR module and BCM. If scan tool communicates with RCDLR module and BCM, go to next step. If scan tool does not communicate with RCDLR module or BCM, 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 RCDLR or BCM DTCs. If scan tool displays any DTCs, go to next step. If scan tool does not display DTCs, repair remote keyless entry system by symptom. See SYSTEM TESTS in REMOTE KEYLESS ENTRY SYSTEMS - ALERO & GRAND AM article.
- 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 B1001, go to next step. If scan tool displays DTCs B1000 or B1001, perform appropriate test. See DTC B1000: BODY CONTROL MODULE MALFUNCTION or DTC B1001: OPTION CONFIGURATION ERROR under DIAGNOSTIC TESTS.
- If scan tool displays DTCs B1327 or B1328, perform appropriate test. See appropriate GENERATORS & REGULATORS article in STARTERS & CHARGING SYSTEMS. If scan tool does not display DTCs B1327 or B1328, repair remote keyless entry system by symptom. See SYSTEM TESTS in REMOTE KEYLESS ENTRY SYSTEMS - ALERO & GRAND AM article.