Self-Diagnostic System

Verify customer's complaint by operating power windows. Check window alignment and window mounting. Check for window frame interference or damaged switches. Check for blown fuse(s), loose or corroded connectors, or damaged wiring harness. Repair or replace components as necessary.

If all components are okay, connect New Generation Star (NGS) tester to Data Link Connector (DLC), located beneath instrument panel. Using NGS tester, perform data link diagnostics test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM in MODULE COMMUNICATIONS NETWORK - CONTINENTAL article. If NGS tester responds with CKT914, CKT915 or CKT70=ALL ECUS NO RESP/NOT EQUIP, repair module communications concern. See MODULE COMMUNICATIONS NETWORK - CONTINENTAL article. If NGS tester displays NO RESP/NOT EQUIP for Driver's Door Module (DDM), perform TEST A: NO COMMUNICATION WITH DRIVER'S DOOR MODULE  under SYSTEM TESTS. If NGS tester displays NO RESP/NOT EQUIP for Lighting Control Module (LCM), perform TEST B: NO COMMUNICATION WITH LIGHTING CONTROL MODULE  under SYSTEM TESTS.

If NGS tester responds with SYSTEM PASSED, retrieve and record continuous DTCs. Erase continuous DTCs. Using NGS tester, perform DDM and LCM self-test. Perform appropriate test in accordance with DTC retrieved. See DRIVER'S DOOR MODULE DTC INDEX  and/or LIGHTING CONTROL MODULE DTC INDEX  table. Codes listed in these tables are only for testing covered in this article. For complete DTC listing, see MODULE COMMUNICATIONS NETWORK - CONTINENTAL article. If no DTCs are retrieved, repair by symptom. See SYMPTOM CHART  table under SYSTEM TESTS.