Self-Diagnostic System

NOTE: Perform TROUBLE SHOOTING before proceeding with self-diagnostics.

Connect New Generation Star (NGS) tester to Data Link Connector (DLC), located below instrument panel. Using NGS tester, perform data link diagnostic test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM in MODULE COMMUNICATIONS NETWORK - EXPLORER & MOUNTAINEER article. If NGS tester displays CKT914, CKT915 or CKT70=ALL ECUS NO RESP/NOT EQUIP, repair module communications concern. See MODULE COMMUNICATIONS NETWORK - EXPLORER & MOUNTAINEER article. If NGS tester displays NO RESP/NOT EQUIP for Generic Electronic Module (GEM), go to TEST U: NO COMMUNICATION WITH GENERIC ELECTRONIC MODULE under SYSTEM TESTS.
If NGS tester displays SYSTEM PASSED for GEM, retrieve and record continuous DTCs using NGS tester. Erase continuous DTCs. Using NGS tester, perform GEM/CTM self-test. If any GEM/CTM DTCs are retrieved, perform appropriate test in accordance with DTC retrieved. See GENERIC ELECTRONIC MODULE/CENTRAL TIMER MODULE (GEM/CTM) DIAGNOSTIC TROUBLE CODE INDEX table. Codes listed in this table are only for testing covered in this article. For complete DTC listing, see MODULE COMMUNICATIONS NETWORK - EXPLORER & MOUNTAINEER article. If no DTCs are retrieved, repair by symptom. See SYMPTOM INDEX table under SYSTEM TEST. See WIRING DIAGRAMS for circuit repairs. Ensure all connectors are reconnected after repair(s).

GENERIC ELECTRONIC MODULE/CENTRAL TIMER MODULE DIAGNOSTIC TROUBLE CODE INDEX

DTC ⁽¹⁾

Description

Perform Test

B1323

Door Ajar Light Circuit Fault

B1325

Door Ajar Light Circuit Short To Voltage

B1342

GEM/CTM Defective

⁽²⁾

B1426

Seat Belt Light Circuit Short To Voltage

B1428

Seat Belt Light Circuit Fault

P1804

4WD High Indicator Light Circuit Fault

P1806

4WD High Indicator Light Circuit Short To Voltage

P1808

4WD Low Indicator Light Circuit Fault

P1810

4WD Low Indicator Light Circuit Short To Voltage

⁽¹⁾	Codes listed in this table are only for testing covered in this article. For complete DTC listing, see MODULE COMMUNICATIONS NETWORK - EXPLORER & MOUNTAINEER article.

⁽²⁾	Using NGS tester, retrieve and document continuous DTCs. Clear all DTCs. Perform GEM/CTM self-test. If DTC B1342 is retrieved again, replace GEM/CTM.