Self-Diagnostic System

Connect New Generation Star (NGS) tester to Data Link Connector (DLC), located below center of instrument panel. Using NGS tester, perform data link diagnostic test. See DATA LINK DIAGNOSTIC TEST in MODULE COMMUNICATIONS NETWORK - ESCAPE article. If NGS tester displays CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, repair module communications concern. See MODULE COMMUNICATIONS NETWORK - ESCAPE article. If NGS tester displays NO RESP/NOT EQUIP for Generic Electronic Module (GEM), perform TEST A: NO COMMUNICATION WITH GENERIC ELECTRONIC MODULE 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 DTCs are retrieved, perform appropriate test in accordance with DTC retrieved. See GENERIC ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE INDEX table. If no DTCs are retrieved, repair by symptom. See SYMPTOM INDEX table under SYSTEM TESTS. Codes listed in this table are only for testing covered in this article. For other DTCs, see MODULE COMMUNICATIONS NETWORK - ESCAPE article.

GENERIC ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE INDEX

DTC ⁽¹⁾

Description

Perform Test

B1302

Accessory Delay Relay Coil Circuit Failure

B1304

Accessory Delay Relay Coil Circuit Open Or Short To Voltage

B1342

ECU Defective

⁽²⁾

⁽¹⁾	Codes listed in this table are only for testing covered in this article. For other DTCs, see MODULE COMMUNICATIONS NETWORK - ESCAPE article.

⁽²⁾	Using NGS tester, perform self-test. Retrieve and document all DTCs. If DTC B1342 is retrieved again, replace GEM.