Self-Diagnostic System

CAUTION: On models equipped with side air bags, Air Bag Simulators (Restraint Diagnostic Tool 105-R0012) MUST be connected to all air bag floor connector. After diagnosing/repairing, restraint system diagnostic tool must be removed prior to operating vehicle.

NOTE: Self-diagnostics is available only on Navigator with memory seat option.

For preliminary testing, see TROUBLE SHOOTING . If problem is not found, 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 appropriate MODULE COMMUNICATIONS NETWORK article. If NGS tester displays CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, repair module communication concern. See appropriate MODULE COMMUNICATIONS NETWORK article. If NGS tester displays NO RESP/NOT EQUIP for Driver's Door Module (DSM), see appropriate MODULE COMMUNICATIONS NETWORK 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 the concern are retrieved, perform appropriate test. See DSM DTC TEST INDEX table. If no DTCs related to the concern are retrieved, perform appropriate test based on symptom. See SYMPTOM INDEX table under SYSTEM TESTS. For DTCs not covered in this article, see appropriate MODULE COMMUNICATIONS NETWORK article.

NOTE: Navigators built between 10/4/99 and 10/25/99 coud be equipped with with a carry over Expedition/Navigator unique seat control switch or corporate seat control switch. If equipped with corporate seat control switch perform appropriate test for Navigators built after 10/25/99.

DSM DTC 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

⁽³⁾

B1664

Driver's Seat Rear Up/Down Motor Stalled

⁽³⁾

B1665

Driver's Seat Forward/Backward Motor Stalled

⁽³⁾

B1711

Driver's Seat Front Up Switch Circuit Short To Power

⁽⁴⁾

B1715

Driver's Seat Front Down Switch Circuit Short To Power

⁽⁴⁾

B1719

Driver's Seat Forward Switch Circuit Short To Power

⁽⁴⁾

B1723

Driver's Seat Rearward Switch Circuit Short To Power

⁽⁴⁾

B1727

Driver's Seat Rear Up Switch Circuit Short To Power

⁽⁴⁾

B1731

Driver's Seat Rear Down Switch Circuit Short To Power

⁽⁴⁾

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 appropriate MODULE COMMUNICATIONS NETWORK 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.

⁽³⁾	Perform test H: MEMORY SEAT INOPERATIVE (NAVIGATOR ONLY) . Perform test I: MEMORY SEAT INOPERATIVE (NAVIGATORS BUILT AFTER 10/25/99) . Perform test J: MEMORY SEAT ONLY MOVES IN ONE SECOND INTERVALS/MEMORY SEAT DOES NOT OPERATE USING MEMORY SWITCH (NAVIGATOR ONLY) .

⁽⁴⁾	Perform test H: MEMORY SEAT INOPERATIVE (NAVIGATOR ONLY) . Perform test I: MEMORY SEAT INOPERATIVE (NAVIGATORS BUILT AFTER 10/25/99) .