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Self-Diagnostic System: Self-Diagnostics

NOTE: The power window system utilizes a self-diagnostic system which may store a Diagnostic Trouble Code (DTC) if a problem exists in system. DTCs may be retrieved using New Generation Star (NGS) tester, or equivalent scan tool, connected to Data Link Connector (DLC).

Connect New Generation Star (NGS) tester to Data Link Connector (DLC). DLC is located below center of instrument panel, right of steering wheel. Using NGS tester, perform data link diagnostic test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM in MODULE COMMUNICATIONS NETWORK - EXPEDITION & NAVIGATOR article. If NGS tester displays CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, repair module communication concern. See MODULE COMMUNICATIONS NETWORK - EXPEDITION & NAVIGATOR article. If NGS tester displays NO RESP/NOT EQUIP for Generic Electronic Module (GEM), perform TEST A: NO COMMUNICATION WITH GEM  under SYSTEM TESTS.

If NGS tester displays SYSTEM PASSED, retrieve and record continuous DTCs. Erase continuous DTCs. Using NGS tester, perform GEM self-test. If GEM DTCs are retrieved, perform appropriate test. See GENERIC ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE INDEX  table. If no DTCs are retrieved, perform appropriate test based on symptom. See SYMPTOM INDEX  table under SYSTEM TESTS. For GEM DTCs not covered in this article, see MODULE COMMUNICATIONS NETWORK - EXPEDITION & NAVIGATOR article.

GENERIC ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE INDEX

DTC (1) Description Perform Test
B1302 Accessory Delay Relay Coil Circuit Failure B 
B1304 Accessory Delay Relay Coil Circuit Short To Power B 
B1313 Battery Saver Relay Coil Circuit Failure B 
B1315 Battery Saver Relay Coil Circuit Short To Power B 
B1342 ECU Defective (2)
B1398 Driver Window One-Touch Window Relay Circuit Failure D 
B1400 Driver Power Window One-Touch Window Relay Circuit Short To Power D 
B1405 Driver Power Window Down Circuit Short To Power C 
B1410 Driver Power Window Motor Circuit Failure C 
(1) Codes listed in this table are only for testing covered in this article. For complete DTC listing, see MODULE COMMUNICATIONS NETWORK - EXPEDITION & NAVIGATOR article.
(2) Using NGS tester clear DTCs. Retrieve DTCs. If DTC B1342 is retrieved, replace GEM. See GENERIC ELECTRONIC MODULE  under REMOVAL & INSTALLATION.
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