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Self-Diagnostic System

WARNING: This page is about a different car, the 2001 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The following procedures were written specifically for use with New Generation Star (NGS) tester. Other OBD-II compliant generic scan tools can be used, but may have limited functions.

Connect New Generation Star (NGS) tester to Data Link Connector (DLC). DLC is located below left side of instrument panel, to right of steering column. Using NGS tester, perform data link diagnostics test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM in MODULE COMMUNICATIONS NETWORK - LS article. If NGS tester responds with CKT914, CKT915 or CKT70=ALL ECUS NO RESP/NOT EQUIP, repair module communications concern. See MODULE COMMUNICATIONS NETWORK - LS article. If NGS tester displays NO RESP/NOT EQUIP for Front Electronic Module (FEM), perform TEST A: NO COMMUNICATION WITH FRONT ELECTRONIC MODULE  under SYSTEM TESTS. If NGS tester displays NO RESP/NOT EQUIP for Rear Electronic Module (REM), perform TEST B: NO COMMUNICATION WITH REAR ELECTRONIC MODULE  under SYSTEM TESTS. If NGS tester displays NO RESP/NOT EQUIP for Instrument Cluster Module (ICM), perform TEST C: NO COMMUNICATION WITH INSTRUMENT CLUSTER MODULE  under SYSTEM TESTS. If NGS tester displays NO RESP/NOT EQUIP for Driver's Door Module (DDM), perform TEST D: NO COMMUNICATION WITH DRIVER'S DOOR MODULE  under SYSTEM TESTS.

If NGS tester responds with SYSTEM PASSED, retrieve and record continuous DTCs. Erase continuous DTCs. Using NGS tester, perform DDM, FEM, ICM and REM self-test. Perform appropriate test under SYSTEM TESTS in accordance with DTC retrieved. See FRONT ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE INDEX  , REAR ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE INDEX  , INSTRUMENT CLUSTER MODULE DIAGNOSTIC TROUBLE CODE INDEX  and/or DRIVER'S DOOR MODULE DIAGNOSTIC TROUBLE CODE INDEX  table. Codes listed in these tables are only for testing covered in this article. For complete DTC listing, see MODULE COMMUNICATIONS NETWORK - LS article. If no DTCs are retrieved, repair by symptom. See SYMPTOM INDEX  table.

FRONT ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE INDEX

DTC (1) Description Perform Test
B1319 Driver's Door Ajar Circuit Failure BC 
B1327 Passenger's Door Ajar Circuit Failure BC 
B1342 ECU Defective (2)
B1499 Left Turn Signal Circuit Failure AE 
B1503 Right Turn Signal Circuit Failure AE 
B1505 Right Turn Signal Circuit Short To Power AE 
B1509 Left Turn Signal Circuit Short To Power AE 
B1567 Headlight High Beam Circuit Failure F 
B1794 Headlight Low Beam Circuit Failure E 
(1) Codes listed in this table are only for testing covered in this article. For complete DTC listing, see MODULE COMMUNICATIONS NETWORK - LS article.
(2) Using new generation star tester, retrieve and document continuous DTCs. Clear all DTCs. Perform Front Electronics Module (FEM) self-test. If DTC B1342 is retrieved again, replace FEM.
REAR ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE INDEX

DTC (1) Description Perform Test
B1331 Luggage Compartment Lid Ajar Circuit Failure BD 
B1335 Right Rear Door Ajar Circuit Failure BC 
B1342 ECU Defective (2)
B1483 Brake Pedal Input Circuit Failure Q 
B1499 Left Rear Turn Signal Circuit Failure AB 
B1501 Left Rear Turn Signal Circuit Short To Power AC 
B1503 Right Rear Turn Signal Circuit Failure AA 
B1505 Right Front Turn Signal Circuit Short To Power AE 
B1571 Left Rear Door Ajar Circuit Failure BC 
(1) Codes listed in this table are only for testing covered in this article. For complete DTC listing, see MODULE COMMUNICATIONS NETWORK - LS article.
(2) Using new generation star tester, retrieve and document all continuous DTCs. Clear DTCs. Perform Rear Electronic Module (REM) self-test. If DTC B1342 is retrieved again, replace REM.
INSTRUMENT CLUSTER MODULE DIAGNOSTIC TROUBLE CODE INDEX

DTC (1) Description Perform Test
B1342 ECU Defective (2)
B1470 Headlight Input Circuit Failure E 
B1567 Headlight High Beam Circuit Failure F 
B1676 Battery pack Voltage Out Of Range K 
B1689 Autolamp Delay Circuit Failure O 
B1875 Turn Signal/Hazard Switch Circuit Failure AF 
B2472 Fog Light Switch Failure AT 
(1) Codes listed in this table are only for testing covered in this article. For complete DTC listing, see MODULE COMMUNICATIONS NETWORK - LS article.
(2) Using new generation star tester, retrieve and document all continuous DTCs. Clear DTCs. Perform Instrument Cluster Module (ICM) self-test. If DTC B1342 is retrieved again, replace ICM.
DRIVER'S DOOR MODULE DIAGNOSTIC TROUBLE CODE INDEX

DTC (1) Description Perform Test
B1342 ECU Defective (2)
(1) Codes listed in this table are only for testing covered in this article. For complete DTC listing, see MODULE COMMUNICATIONS NETWORK - LS article.
(2) Using new generation star tester, retrieve and document all continuous DTCs. Clear DTCs. Perform Driver's Door Module (DDM) self-test. If DTC B1342 is retrieved again, replace DDM.
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