Self-Diagnostic System

NOTE: All diagnostic tests are written specifically for New Generation Star (NGS) tester. Most generic OBD-II compliant scan tools should be able to perform all test procedures.

NOTE: All power door locks and luggage release actuators are powered by Switched System Power (SSP) feature. A failure of any or all SSP features could cause inoperative door locks. When diagnosing power door locks, it is essential to determine if related symptoms and DTCs are controlled by SSP feature.See SWITCHED SYSTEM POWER RELAY INDEX under SYSTEM TESTS, for related systems.

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 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 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 Front Electronic Module (FEM), perform TEST R: NO COMMUNICATION WITH FRONT ELECTRONIC 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 and REM self-test. Perform appropriate test in accordance with DTC retrieved. See DRIVER'S DOOR MODULE DIAGNOSTIC TROUBLE CODE INDEX , FRONT ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE INDEX and/or REAR ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE 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 DIAGNOSTIC TROUBLE CODE INDEX

DTC ⁽¹⁾

Description

Perform Test

B1309

Power Door Lock Circuit Short To Ground

B1341

Power Door Unlock Circuit Short To Ground

B1342

ECU Defective

⁽²⁾

B2112

Door Driver Set Switch Stuck Failure

B2116

Door Driver Reset Switch Stuck Failure

B2425

Remote Keyless Entry Out Of Synchronization

⁽¹⁾	DTCs 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, clear and document all DTCs. Perform Driver's Door Module (DDM) self-test. If DTC B1342 is retrieved again, replace DDM. See DRIVER'S DOOR MODULE under REMOVAL & INSTALLATION.

FRONT ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE INDEX

DTC ⁽¹⁾

Description

Perform Test

B1342

ECU Defective

⁽²⁾

⁽¹⁾	DTC 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, clear and document all DTCs. Perform Front Electronic Module (FEM) self-test. If DTC B1342 is retrieved again, replace FEM. See FRONT ELECTRONIC MODULE under REMOVAL & INSTALLATION.

REAR ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE INDEX

DTC ⁽¹⁾

Description

Perform Test

B1300

Power Door Lock Circuit Failure

B1310

Power Door Unlock Circuit Failure

B1551

Luggage Compartment Release Circuit Failure

B1342

ECU Defective

⁽²⁾

⁽¹⁾	DTCs 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, clear and document all DTCs. Perform Rear Electronic Module (REM) self-test. If DTC B1342 is retrieved again, replace REM. See REAR ELECTRONIC MODULE under REMOVAL & INSTALLATION.