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Test J: Driver's Seat Module (DSM) Does Not Respond To NGS Tester

NOTE: Driver's Seat Module (DSM) will fail data link diagnostic test if vehicle is not equipped with this module. Vehicles with memory seats are equipped with a DSM.
  1. Turn ignition switch to LOCK position. Disconnect DSM harness connector C341c, located under driver's seat. Disconnect NGS tester (if connected). Inspect harness connector for loose, damaged or corroded terminals. If problem exists, repair harness connector as necessary and retest system for normal operation. If problem does not exist, go to next step.
  2. Connect DSM harness connector C401a and connect NGS tester. Turn ignition switch to RUN position. Perform data link diagnostic test. See DATA LINK DIAGNOSTIC TEST  under SELF-DIAGNOSTIC SYSTEM. If NGS tester indicates DSM: NO RESPONSE ON CKT 914 (BUS +), go to next step. If NGS tester indicates DSM: NO RESPONSE ON CKT 915 (BUS -), go to step  10 .
  3. Turn ignition switch to LOCK position. Disconnect DSM harness connector C341c. Disconnect NGS tester. Measure resistance between terminal No. 1 (Gray/White wire) at DSM harness connector C341c and terminal No. 2 (Gray/Red wire) at Data Link Connector (DLC). See Figure and Fig 1 . If resistance is greater than 5 ohms, go to next step. If resistance is 5 ohms or less, replace DSM and retest system for normal operation.
  4. Disconnect Auxiliary Junction Box (AJB) harness connector C283a, located behind left side of instrument panel. See Figure . Inspect harness connector for loose, damaged or corroded terminals. If problem does not exist, go to next step. If problem exists, repair harness connector as necessary and retest system for normal operation.
  5. Measure resistance in Gray/White wire between terminal No. 16 at AJB harness connector C283a and terminal No. 1 at DSM harness connector C341c. See Figure and Fig 1 . If resistance is greater than 5 ohms, go to next step. If resistance is 5 ohms or less, go to step  7 .
  6. Disconnect in-line harness connector C315, located under driver' seat. Measure resistance in Gray/White wire between terminal No. 6 at male half of in-line harness connector C315 and terminal No. 1 at DSM harness connector C341c. See Fig 1 and Fig 2 . If resistance is 5 ohms or less, repair open in Gray/White wire between in-line harness connector and AJB. Retest system for normal operation. If resistance is greater than 5 ohms, repair open in Gray/White wire between in-line harness connector C315 and DSM. Retest system for normal operation.
  7. Disconnect AJB harness connector C283d, located behind left side of instrument panel. See Figure . Measure resistance between terminal No. 16 at AJB connector C283a and terminal No. 16 at AJB connector C283d (component side). See Figure . If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, replace AJB and retest system for normal operation.
  8. Disconnect joint connector No. 4 harness connector C223, located behind left side of instrument panel. Measure resistance in Gray wire between terminal No. 12 at joint connector No. 4 harness connector C223 and terminal No. 16 at AJB harness connector C283d. See Figure and Figure . If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Gray wire between AJB and joint connector No. 4. Retest system for normal operation.
  9. Measure resistance between terminals No. 12 and 14 at joint connector No. 4 (component side). See Figure . If resistance is 5 ohms or less, repair open in Gray/Red wire between joint connector No. 4 and DLC. Retest system for normal operation. If resistance is greater than 5 ohms, replace joint connector No. 4 and retest system for normal operation.
  10. Turn ignition switch to LOCK position. Disconnect DSM harness connector C341c. Disconnect NGS tester. Measure resistance between terminal No. 9 (Blue/Orange wire) at DSM harness connector C341c and terminal No. 10 (Blue/Red wire) at Data Link Connector (DLC). See Figure and Fig 1 . If resistance is greater than 5 ohms, go to next step. If resistance is 5 ohms or less, replace DSM and retest system for normal operation.
  11. Disconnect Auxiliary Junction Box (AJB) harness connector C283a, located behind left side of instrument panel. See Figure . Inspect harness connector for loose, damaged or corroded terminals. If problem does not exist, go to next step. If problem exists, repair harness connector as necessary and retest system for normal operation.
  12. Measure resistance in Blue/Orange wire between terminal No. 12 at AJB harness connector C283a and terminal No. 9 at DSM harness connector C341c. See Figure and Fig 1 . If resistance is 5 ohms or less, go to step  14 . If resistance is greater than 5 ohms, go to next step.
  13. Disconnect in-line harness connector C315, located under driver' seat. Measure resistance in Blue/Orange wire between terminal No. 13 at male half of in-line harness connector C315 and terminal No. 9 at DSM harness connector C341c. See Fig 1 and Fig 2 . If resistance is 5 ohms or less, repair open in Blue/Orange wire between in-line harness connector and AJB. Retest system for normal operation. If resistance is greater than 5 ohms, repair open in Blue/Orange wire between in-line harness connector C315 and DSM. Retest system for normal operation.
  14. Disconnect AJB harness connector C283d, located behind left side of instrument panel. See Figure . Measure resistance between terminal No. 12 at AJB connector C283a and terminal No. 12 at AJB connector C283d (component side). See Figure . If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, replace AJB and retest system for normal operation.
  15. Disconnect joint connector No. 4 harness connector C223, located behind left side of instrument panel. Measure resistance in Blue wire between terminal No. 11 at joint connector No. 4 harness connector C223 and terminal No. 12 at AJB harness connector C283d. See Figure and Figure . If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Blue wire between AJB and joint connector No. 4. Retest system for normal operation.
  16. Measure resistance between terminals No. 9 and 11 at joint connector No. 4 (component side). See Figure . If resistance is 5 ohms or less, repair open in Blue/Red wire between joint connector No. 4 and DLC. Retest system for normal operation. If resistance is greater than 5 ohms, replace joint connector No. 4 and retest system for normal operation.
Fig 1: Identifying Driver's Seat Module Harness Connector Terminals
G00011085Courtesy of FORD MOTOR CO.
Fig 2: Identifying In-Line Harness Connector C315 Terminals
G98I12300Courtesy of FORD MOTOR CO.
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