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Self-Diagnostic System

NOTE: Before performing self-diagnostics, perform TROUBLE SHOOTING  .

Connect New Generation Star (NGS) tester to Data Link Connector (DLC), located under center of instrument panel. 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 (FEM)  under SYSTEM TESTS. If NGS tester displays NO RESP/NOT EQUIP for Rear Electronic Module (REM), perform TEST B: NO COMMUNICATIONS WITH REAR ELECTRONIC MODULE (REM)  under SYSTEM TESTS. If NGS tester displays NO RESP/NOT EQUIP for Driver's Door Module (DDM), perform TEST C: NO COMMUNICATION WITH DRIVER'S DOOR MODULE (DDM)  under SYSTEM TESTS.

If NGS tester responds with SYSTEM PASSED, retrieve and record continuous DTCs. Erase continuous DTCs. Using NGS tester, perform FEM, REM and DDM self-test(s). See MODULE COMMUNICATIONS NETWORK - LS article. Perform appropriate test in accordance with DTC retrieved. See DRIVER'S DOOR MODULE DTC INDEX  ,FRONT ELECTRONIC MODULE DTC INDEX  and/or REAR ELECTRONIC MODULE DTC INDEX  table(s). 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 under SYSTEM TESTS.

DRIVER'S DOOR MODULE DTC INDEX

DTC (1) Description Perform Test
B1342 ECU Defective (2)
B1400 One-touch Down Relay Circuit Shorted To Power Q 
B1405 Driver's Window Down Circuit Shorted To Power F 
B1408 Driver's Window Up Circuit Shorted To Power F 
B1416 Left Rear Window Motor Circuit Shorted To Power N 
B1420 Passenger's Window Motor Circuit Shorted To Power H 
B1424 Right Rear Window Motor Circuit Shorted To Power K 
(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 NGS tester, retrieve and document all continuous Driver's Door Module (DDM) DTCs. Perform DDM self-test. If DTC B1342 is retrieved again, replace DDM.
FRONT ELECTRONIC MODULE DTC INDEX

DTC (1) Description Perform Test
B1342 ECU Defective (2)
B2214 Passenger's UP Switch Shorted To Power G 
B2215 Passenger's DOWN Switch Shorted To Power G 
(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 NGS tester, retrieve and document all continuous Front Electronic Module (FEM) DTCs. Perform FEM self-test. If DTC B1342 is retrieved again, replace FEM.
REAR ELECTRONIC MODULE DTC INDEX

DTC (1) Description Perform Test
B1342 ECU Defective (2)
B2174 Left Rear Up Switch Shorted To Power M 
B2178 Left Rear Down Switch Shorted To Power M 
B2190 Right Rear Up Switch Shorted To Power J 
B2194 Right Rear Down Switch Shorted To Power J 
(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 NGS tester, retrieve and document all continuous Rear Electronic Module (REM) DTCs. Perform REM self-test. If DTC B1342 is retrieved again, replace REM.
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