Self-Diagnostic System: Self-Diagnostics

Remote Keyless Entry (RKE) system utilizes a self-diagnostic system which may store a DTC if a problem exists in system. DTCs may be retrieved using New Generation Star (NGS) tester or other OBD-II compliant scan tool and Data Link Connector (DLC) for diagnosis of system. If vehicle is not equipped with RKE, diagnose by symptom. See SYMPTOM INDEX  table under SYSTEM TESTS.

Connect New Generation Star (NGS) tester to Data Link Connector (DLC). DLC is located below driver's side of instrument panel, right of steering column. Using NGS tester, perform DATA LINK DIAGNOSTIC TEST. See DATA LINK DIAGNOSTIC TEST in MODULE COMMUNICATIONS NETWORK - F150 PICKUP article. If NGS tester displays CKT 914, CKT 915 or CKT 70=ALL MODULES NO RESP/NOT EQUIP, diagnose module problem. See MODULE COMMUNICATIONS NETWORK - F150 PICKUP article. If NGS tester displays NO RESP/NOT EQUIP for Central Security Module (CSM), go to TEST D: NO COMMUNICATION WITH CENTRAL SECURITY MODULE . If NGS tester displays SYSTEM PASSED, retrieve and record continuous DTCs. Erase continuous DTCs. Perform self-test for CSM using NGS tester. Codes listed in tables are only for testing covered in this article. For a complete DTC listing, see MODULE COMMUNICATIONS NETWORK - F150 PICKUP article. If CSM module DTCs are retrieved, see CENTRAL SECURITY MODULE DIAGNOSTIC TROUBLE CODE INDEX  table to continue diagnosis. If no DTCs are retrieved, perform appropriate system test. See SYMPTOM INDEX  table under SYSTEM TESTS.