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Self-Diagnostic System

NOTE: Before performing SELF-DIAGNOSTICS, perform TROUBLE SHOOTING  .
  1. The power door locks utilize a self-diagnostic system which may store a Diagnostic Trouble Code (DTC) if a problem exists in the system. DTCs may be retrieved using New Generation Star (NGS) tester and Data Link Connector (DLC) for diagnosis of system.
  2. Connect NGS tester to DLC located below instrument panel. Using NGS tester, perform DATA LINK DIAGNOSTIC TEST. If NGS tester displays CKT 914, CKT 915 or CKT 70=ALL ECUS NO RESP/NOT EQUIP, see appropriate MODULE COMMUNICATIONS NETWORK article to diagnosis network concern. If NGS tester displays NO RESP/NOT EQUIP for Driver Door Module (DDM), perform TEST A: NO COMMUNICATION WITH DDM  under SYSTEM TESTS. If NGS tester displays NO RESP/NOT EQUIP for Lighting Control Module (LCM), perform TEST B: NO COMMUNICATION WITH LCM  under SYSTEM TESTS.
  3. If NGS tester displays SYSTEM PASSED, retrieve and record continuous DTCs. Erase continuous DTCs. Perform self-test for DDM and LCM using NGS tester. If DDM DTCs are retrieved, see DRIVER DOOR MODULE (DDM) DTC INDEX  table to continue diagnosis. If LCM DTCs are retrieved, see LIGHTING CONTROL MODULE (LCM) DTC INDEX  table to continue diagnosis. If no DTCs are retrieved, perform appropriate symptom test under SYSTEM TESTS  .
DRIVER DOOR MODULE (DDM) DTC INDEX

DTC (1) Description Perform Test
B1342 ECU Defective (2)
B1396 Door Lock Circuit Short To Battery E 
B1397 Door Unlock Circuit Short To Battery E 
B1525 Keyless Entry Circuit Short To Battery E 
B1554 Decklid Release Circuit Short To Ground C 
B1562 Door Lock Cylinder Circuit Short To Ground E 
(1) Codes listed are for testing in this article only. For a complete list of DTCs, see MODULE COMMUNICATIONS NETWORK - CONTINENTAL article.
(2) Clear DTCs. Retrieve DTCs. If DTC B1342 is retrieved, replace driver door module and retest system operation.
LIGHTING CONTROL MODULE (LCM) DTC INDEX

DTC (1) Description Perform Test
B1334 Decklid Ajar Rear Door Circuit Short To Ground C 
B1342 ECU Is Defective (2)
(1) Codes listed are for testing in this article only. For a complete list of DTCs, see MODULE COMMUNICATIONS NETWORK - CONTINENTAL article.
(2) Clear DTCs. Retrieve DTCs. If DTC B1342 is retrieved, replace lighting control module and retest system operation.
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