Self-Diagnostic System

NOTE: All diagnostic tests are written specifically for New Generation Star (NGS) tester. Most generic scan tools should be able to perform all test procedures.

Connect New Generation Star (NGS) tester to Data Link Connector (DLC), located beneath instrument panel. Using NGS tester, perform data link diagnostics test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM in MODULE COMMUNICATIONS NETWORK - WINDSTAR article. If NGS tester responds with CKT914, CKT915 or CKT70=ALL ECUS NO RESP/NOT EQUIP, repair module communications concern. See MODULE COMMUNICATIONS NETWORK - WINDSTAR article. If NGS tester displays NO RESP/NOT EQUIP for Front Electronic Module (FEM), perform TEST A: NO COMMUNICATION WITH FRONT ELECTRONIC MODULE (FEM) under SYSTEM TESTS. If NGS tester displays NO RESP/NOT EQUIP for Rear Electronic Module (REM), perform TEST B: NO COMMUNICATION WITH REAR ELECTRONIC MODULE (REM) under SYSTEM TESTS. If NGS tester displays NO RESP/NOT EQUIP for instrument cluster, perform TEST C: NO COMMUNICATION WITH INSTRUMENT CLUSTER under SYSTEM TESTS.

If NGS tester responds with SYSTEM PASSED, retrieve and record continuous DTCs. Erase continuous DTCs. Using NGS tester, perform instrument cluster, FEM and REM self-tests. Perform appropriate test in accordance with DTC retrieved. See FRONT ELECTRONIC MODULE (FEM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX , REAR ELECTRONIC MODULE (REM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX and/or INSTRUMENT CLUSTER DIAGNOSTIC TROUBLE CODE (DTC) INDEX table. Codes listed in these tables are only for testing covered in this article. For complete DTC listing, see MODULE COMMUNICATIONS NETWORK - WINDSTAR article. If no DTCs are retrieved, repair by symptom. See SYMPTOM CHART table.

FRONT ELECTRONIC MODULE (FEM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC ⁽¹⁾

Description

Perform Test

B1243

Express Down Switch Circuit Short To Voltage

B1304

Accessory Delay Relay Coil Circuit Short To Voltage

B1342

ECU Defective

⁽²⁾

B1404

Driver's Power Window DOWN Circuit Open

B1405

Driver's Power Window DOWN Circuit Short To Voltage

B1407

Driver's Power Window UP Circuit Open

B1408

Driver's Power Window UP 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 - WINDSTAR article.

⁽²⁾	Clear and document all DTC. Perform Front Electronic Module (FEM) self-test. If DTC B1342 is retrieved again, replace FEM. See FRONT ELECTRONIC MODULE (FEM) under REMOVAL & INSTALLATION.

REAR ELECTRONIC MODULE (REM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC ⁽¹⁾

Description

Perform Test

B1342

ECU Defective

⁽²⁾

B1349

Heated Rear Window Relay 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 - WINDSTAR article.

⁽²⁾	Clear and document all DTC. Perform Rear Electronic Module (REM) self-test. If DTC B1342 is retrieved again, replace REM. See REAR ELECTRONIC MODULE (REM) under REMOVAL & INSTALLATION.

INSTRUMENT CLUSTER DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC ⁽¹⁾

Description

Perform Test

B1342

ECU Defective

⁽²⁾

B1345

Heated Backlite Input Circuit Short To Ground

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

⁽²⁾	Clear and document all DTC. Perform instrument cluster self-test. If DTC B1342 is retrieved again, replace instrument cluster.

SYMPTOM CHART

Condition	Perform Test
No Communication With Front Electronic Module (FEM)	A
No Communication With Rear Electronic Module (REM)	B
No Communication With Instrument Cluster	C
All Power Windows Inoperative	D
Driver's Front Power Window Inoperative	E
Passenger's Front Power Window Inoperative	F
Vent Power Window(s) Inoperative	G
One Touch Down Feature Inoperative	H
Rear Window Will Not Defrost	I
Rear Window Defroster Will Not Shut Off Automatically	J
Delayed Accessory Does Not Turn Off	K