Self-Diagnostic System

NOTE: Tests included in this article are written specifically for New Generation Star (NGS) tester functionality. Other OBD II-compatible scan tools may be used, but may not be equipped with equal test function capabilities. Refer to scan tool manufacturer's instructions.

NOTE: It is possible to retrieve instrument cluster Diagnostic Trouble Codes (DTC) using instrument cluster. See ANALOG INSTRUMENT PANELS - MUSTANG article.

Connect New Generation Star (NGS) tester to Data Link Connector (DLC), located beneath center of instrument panel. Using NGS tester, perform data link diagnostic test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM in MODULE COMMUNICATIONS NETWORK - MUSTANG article. If NGS tester displays CKT914, CKT915 or CKT70=ALL ECUS NO RESP/NOT EQUIP, repair module communications concern. See MODULE COMMUNICATIONS NETWORK - MUSTANG article.

If NGS tester displays NO RESP/NOT EQUIP for Generic Electronic Module (GEM), perform TEST C: NO COMMUNICATION WITH GENERIC ELECTRONIC MODULE under SYSTEM TESTS. If NGS tester displays NO RESP/NOT EQUIP for Instrument Cluster Module (ICM), perform TEST D: NO COMMUNICATION WITH INSTRUMENT CLUSTER MODULE under SYSTEM TESTS.

If NGS tester responds with SYSTEM PASSED, retrieve and record continuous DTCs from GEM and ICM. Erase continuous DTCs. Using NGS tester, perform GEM and ICM self-tests. Perform appropriate test in accordance with DTC retrieved. See DIAGNOSTIC TROUBLE CODE INDEX and INSTRUMENT CLUSTER MODULE DIAGNOSTIC TROUBLE CODE INDEX tables. Codes listed in these tables are only for testing covered in this article. For complete DTC listing, see MODULE COMMUNICATIONS NETWORK - MUSTANG article. If no DTCs are retrieved, repair by symptom. See SYMPTOM INDEX table under SYSTEM TESTS.

GENERIC ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE INDEX

DTC ⁽¹⁾

Description

Perform System Test

B1342

ECU Defective

⁽²⁾

B1343

Heated Backlight Input Circuit Failure

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

⁽²⁾	Using scan tool, clear DTCs. If DTC B1342 resets, replace generic electronic module. See REMOVAL & INSTALLATION .

INSTRUMENT CLUSTER MODULE DIAGNOSTIC TROUBLE CODE INDEX

DTC