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Self-Diagnostic System

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

Turn ignition switch to LOCK position. Connect New Generation Star (NGS) tester to Data Link Connector (DLC). DLC is located below driver's side of instrument panel, right of steering column. Turn ignition switch to RUN position. Select vehicle to be tested from NGS tester menu. 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 ECUSNO 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 A: NO COMMUNICATION WITH GENERIC ELECTRONIC MODULE  under SYSTEM TESTS.

If NGS tester displays SYSTEM PASSED, retrieve and record continuous DTCs from GEM. Erase continuous DTCs. Using NGS tester, perform GEM self-test. Perform appropriate test in accordance with DTC retrieved. See GENERIC ELECTRONIC MODULE 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 - 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 Test
B1342 GEM Defective (2)
B1431 On/Off Relay Circuit Failure B 
B1432 On/Off Relay Circuit Short To Power B 
B1434 High/Low Relay Coil Circuit Failure B 
B1436 High/Low Relay Coil Circuit Short To Power B 
B1438 Wiper Switch Circuit Failure B 
B1441 Wiper Switch Circuit Short To Ground B 
B1446 Park Sense Circuit Failure B 
B1448 Park Sense Circuit Short To Power B 
B1450 Wash/Delay Switch Circuit Failure C 
B1453 Wash/Delay Switch Circuit Short To Ground C 
B1458 Washer Pump Motor Relay Circuit Failure C 
B1460 Washer Pump Motor Relay Coil Circuit Short To Power C 
B1466 High & Low Speeds Not Switching B 
B1473 Motor Low Speed Circuit Failure B 
B1476 Motor High Speed Circuit Failure B 
(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) Clear DTCs. Retrieve DTCs. If B1342 is retrieved again, replace generic electronic module. See REMOVAL & INSTALLATION  . Clear DTCs and retest.
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