Self-Diagnostic System

CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.

NOTE: Before beginning any testing, perform TROUBLE SHOOTING . Test procedures are written specifically for New Generation Star (NGS) tester. OBD-II compliant generic scan tools may not have the capability of performing all the same functions. Refer to scan tool manufacturer's instructions.

Connect New Generation Star (NGS) tester to Data Link Connector (DLC) located below center of instrument panel. Perform data link diagnostic test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM in MODULE COMMUNICATIONS NETWORK - EXPEDITION & NAVIGATOR article. If NGS tester displays CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, repair module communication fault. See MODULE COMMUNICATIONS NETWORK - EXPEDITION & NAVIGATOR article. If NGS tester displays NO RESP/NOT EQUIP for Driver's Door Module (DSM), perform TEST J: NO COMMUNICATION WITH DRIVER'S SEAT MODULE under SYSTEM TESTS.

If NGS tester displays SYSTEM PASSED for DSM, retrieve and record continuous Diagnostic Trouble Codes (DTCs). Erase continuous DTCs. Perform DSM self-test. If DTCs related to the concern are retrieved, perform appropriate test. See DSM DTC INDEX table. If no DTCs related to the fault are retrieved, repair by symptom. See SYMPTOM INDEX table under SYSTEM TESTS. For DTCs not covered in this article, see MODULE COMMUNICATIONS NETWORK - EXPEDITION & NAVIGATOR article.

DSM DTC INDEX

DTC ⁽¹⁾

Description

Perform Test

B1342

ECU Defective

⁽²⁾

B1529

Memory Set Switch Circuit Short To Power

⁽³⁾

B1533

Memory 1 Switch Circuit Short To Power

⁽³⁾

B1537

Memory 2 Switch Circuit Short To Power

⁽³⁾

B1667

Driver's Memory Mirror Up/Down Motor Stalled

⁽³⁾

B1668

Driver's Memory Mirror Up/Down Motor Stalled

⁽³⁾

B1669

Passenger's Memory Mirror Up/Down Motor Stalled

⁽³⁾

B1670

Passenger's Memory Mirror Up/Down Motor Stalled

⁽³⁾

B1697

Mirror Control Switch Circuit Short To Power

B1735

Driver's Side Vertical Switch Short To Power

B1739

Driver's Side Horizontal Switch Short To Power

B1743

Passenger's Side Vertical Switch Short To Power

B1747

Passenger's Side Horizontal Switch Short To Power

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

⁽²⁾	Using NGS tester, retrieve and document all continuous DTCs. Perform Driver's Seat Module (DSM) self-test. If DTC B1342 is retrieved again, replace DSM.

⁽³⁾	Perform TEST D: MEMORY MIRROR INOPERATIVE or TEST F: MEMORY MIRROR INOPERATIVE USING MEMORY SET SWITCH .