Self-Diagnostic System

NOTE: Before beginning self-diagnostics, perform TROUBLE SHOOTING .

NOTE: Many test steps refer to various connectors. To identify connectors, use appropriate illustration. See CONNECTOR IDENTIFICATION DIRECTORY table under CONNECTOR IDENTIFICATION.

Verify customers complaint. Check for loose or corroded connectors, blown fuses and damaged wiring harness. Check for obstructed seat tracks and damaged motors. Repair or replace components as necessary.

If all components are okay, connect New Generation Star (NGS) tester to Data Link Connector (DLC), located below instrument panel. Using NGS tester, perform data link diagnostics test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM in MODULE COMMUNICATIONS NETWORK - CONTINENTAL article. If NGS tester responds with CKT914, CKT915 or CKT70=ALL ECUS NO RESP/NOT EQUIP, repair module communications concern. See MODULE COMMUNICATIONS NETWORK - CONTINENTAL article. If NGS tester displays NO RESP/NOT EQUIP for Driver's Seat Module (DSM), perform TEST B: NO COMMUNICATION WITH DRIVER'S SEAT MODULE under SYSTEM TESTS. If NGS tester displays NO RESP/NOT EQUIP for Driver's Door Module (DDM), perform TEST A: NO COMMUNICATION WITH DRIVER'S DOOR MODULE under SYSTEM TESTS.

If NGS tester responds with SYSTEM PASSED, retrieve and record continuous DTCs. Erase continuous DTCs. Using NGS tester, perform DDM and DSM self-test. Perform appropriate test in accordance with DTC retrieved. See DRIVER'S DOOR MODULE DTC INDEX and/or DRIVER'S SEAT MODULE DTC INDEX table. Codes listed in these table are only for testing covered in this article. For complete DTC listing, see MODULE COMMUNICATIONS NETWORK - CONTINENTAL article. If no DTCs are retrieved, repair by symptom. See SYMPTOM INDEX table under SYSTEM TESTS.

DRIVER'S SEAT MODULE DTC INDEX

DTC ⁽¹⁾

Description

⁽²⁾ Perform Test

B1342

ECU Defective

⁽³⁾

B1663

Driver's Seat Front Up/Down Circuit Failure

B1664

Driver's Seat Rear Up/Down Circuit Failure

B1665

Driver's Seat Forward/Backward Circuit Failure

B1666

Driver's Seat Recline Circuit Failure

B1676

Battery Voltage Out Of Range

B1950

Rear Up/Down Feedback - Circuit Failure

B1953

Rear Up/Down Feedback - Short to Ground

B1954

Front Up/Down Feedback - Circuit Failure

B1957

Front Up/Down Feedback - Short to Ground

B1958

Recline Feedback - Circuit Failure

B1961

Recline Feedback - Short To Ground

B1962

Horizontal Feedback - Circuit Failure

B1965

Horizontal Feedback - 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 - CONTINENTAL article.

⁽²⁾	Many test steps refer to various connectors. To identify connectors, use appropriate illustration. See CONNECTOR IDENTIFICATION DIRECTORY table under CONNECTOR IDENTIFICATION.

⁽³⁾	Using NGS tester, retrieve and document continuous DTCs. Clear all DTCs. Perform Driver's Seat Module (DSM) self-test. If DTC B1342 is retrieved again, replace DSM.

DRIVER'S DOOR MODULE DTC INDEX

DTC ⁽¹⁾

Description

⁽²⁾ Perform Test

B1342

ECU Defective

⁽³⁾

B1545

Power Seat Switch 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 - CONTINENTAL article.

⁽²⁾	Many test steps refer to various connectors. To identify connectors, use appropriate illustration. See CONNECTOR IDENTIFICATION DIRECTORY table under CONNECTOR IDENTIFICATION.

⁽³⁾	Using NGS tester, retrieve and document continuous DTCs. Clear all DTCs. Perform Driver's Door Module (DDM) self-test. If DTC B1342 is retrieved again, replace DDM.