Self-Diagnostic System

WARNING: Vehicle may be equipped with seatback-mounted air bags. Deactivate air bag system before performing any service operation involving seat components. See appropriate AIR BAG RESTRAINT SYSTEMS article in RESTRAINTS.

For preliminary testing, see TROUBLE SHOOTING . If problem is not found, connect New Generation Star (NGS) tester to Data Link Connector (DLC). DLC is located below left side of instrument panel, right of steering column. 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 problem. See MODULE COMMUNICATIONS NETWORK - EXPEDITION & NAVIGATOR article. If NGS tester displays NO RESP/NOT EQUIP for Driver's Seat Module (DSM), see MODULE COMMUNICATIONS NETWORK - EXPEDITION & NAVIGATOR article.

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 problem are retrieved, perform appropriate test. See DRIVER'S SEAT MODULE DIAGNOSTIC TROUBLE CODE TEST INDEX table. If no DTCs related to the problem are retrieved, perform appropriate test based on symptom. See SYMPTOM INDEX table under SYSTEM TESTS. For DTCs not covered in this article, see MODULE COMMUNICATIONS NETWORK - EXPEDITION & NAVIGATOR article.

DRIVER'S SEAT MODULE DIAGNOSTIC TROUBLE CODE TEST INDEX

DTC ⁽¹⁾

Description

Perform Test

B1342

ECU Defective

⁽²⁾

B1529

Memory Set Switch Circuit Short To Power

B1533

Memory 1 Switch Circuit Short To Power

B1537

Memory 2 Switch Circuit Short To Power

B1663

Driver's Seat Front Up/Down Motor Stalled

B1664

Driver's Seat Rear Up/Down Motor Stalled

B1665

Driver's Seat Forward/Backward Motor Stalled

B1711

Driver's Seat Front Up Switch Circuit Short To Power

B1715

Driver's Seat Front Down Switch Circuit Short To Power

B1719

Driver's Seat Forward Switch Circuit Short To Power

B1723

Driver's Seat Rearward Switch Circuit Short To Power

B1727

Driver's Seat Rear Up Switch Circuit Short To Power

B1731

Driver's Seat Rear Down Switch Circuit Short To Power

B1950

Seat Rear Up/Down Potentiometer Feedback Circuit Failure

B1952

Seat Rear Up/Down Potentiometer Feedback Circuit Short To Power

B1954

Seat Front Up/Down Potentiometer Feedback Circuit Failure

B1956

Seat Front Up/Down Potentiometer Feedback Circuit Short To Power

B1962

Seat Horizontal Forward/Rearward Potentiometer Feedback Circuit Failure

B1964

Seat Horizontal Forward/Rearward Potentiometer Feedback Circuit 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. Perform Driver's Seat Module (DSM) self-test. If DTC B1342 is retrieved again, replace DSM.