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Test H: Memory Seat Inoperative Using Memory Set Switch

CAUTION: Side air bag system must be deactivated for diagnosis of power seat (if equipped). See AIR BAG RESTRAINT SYSTEMS - EXPLORER & MOUNTAINEER article. Air Bag Simulator (418-F088) must be installed under seats to floor connector, and removed before operating vehicle.
NOTE: Before beginning this test, ensure seat and seat track are free from all obstructions.
  1. Deactivate air bag system. See AIR BAG RESTRAINT SYSTEMS - EXPLORER & MOUNTAINEER article. Ensure transmission is in Park. Turn ignition switch to LOCK position. Connect New Generation Star (NGS) tester to Data Link Connector (DLC). Retrieved and record continuous DTCs. Clear continuous DTCs. Perform Driver's Seat Module (DSM) self-test. If no DTCs were retrieved during self-test, go to next step. If any DTCs were retrieved and memory switch LED fails to illuminate during self-test, go to step  5 . If any DTCs were retrieved and memory switch LED illuminates during self-test, go to appropriate step. See DIAGNOSTIC TROUBLE CODE TEST STEP  table.
    DIAGNOSTIC TROUBLE CODE TEST STEP

    DTC Go To Step
    B1342 (1)
    B1529  3
    B1533  3
    B1537  3
    B1663  10
    B1664  13
    B1665  16
    B1950  13
    B1950, B1954 & B1962  9
    B1952  13
    B1954  10
    B1956  10
    B1962  16
    B1964  16
    (1) Replace driver's seat module. Recheck system operation.
  2. Using NGS tester, monitor DSM PIDs MEM1_SW, MEM2_SW and MEMS_SW while activating memory switch in all positions. If PID value does not agree with switch position and fuse No. 1 is okay, go to next step. If PID value does not agree with switch position and fuse No. 1 is blown, go to step  7 . If PID value agrees with seat control switch position, go to step  9 .
  3. Turn ignition switch to LOCK position. Remove memory switch. Test memory switch. See MEMORY SWITCH  under COMPONENT TESTS. If memory switch is okay, go to next step. If memory switch is defective, replace memory switch as necessary. Recheck system operation.
  4. Ensure memory switch harness connector C511 is still disconnected. Turn ignition switch to RUN position. Measure voltage between ground and memory switch harness connector C511 terminal No. 6 (Orange/Light Green wire). See Fig 1 . If more than 10 volts exist, go to next step. If 10 volts or less exist, repair open in Orange/Light Green wire between memory set switch and Central Junction Box (CJB). Recheck system operation.
    Fig 1: Identifying Memory Switch Harness Connector C511 Terminals
    G96J31343Courtesy of FORD MOTOR CO.
  5. Turn ignition switch to LOCK position. Measure resistance between ground and memory switch harness connector C511 terminal No. 9 (Black wire). See Fig 1 . If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Black wire between memory set switch and ground. Ground point is located under left side of instrument panel, behind kick panel.
  6. Disconnect DSM 22-pin harness connector C337. Disconnect Remote Anti-Theft Personality (RAP) module Black 22-pin harness connector C338. RAP module is located behind left rear quarter panel. Turn ignition switch to RUN position. Measure voltage between ground and memory switch harness connector terminals No. 1 (Brown/Orange wire), No 3 (Black/Orange wire), No. 4 (Brown/Light Green wire) and No. 8 (White/Orange wire). If voltage does not exist at any terminal, go to next step. If voltage exists at any terminal, repair short to voltage in appropriate wire(s). Recheck system operation.
  7. Turn ignition switch to LOCK position. Measure resistance between ground and memory switch harness connector terminals No. 1 (Brown/Orange wire), No 3 (Black/Orange wire), No. 4 (Brown/Light Green wire) and No. 8 (White/Orange wire). If resistance is more than 10 k/ohms at all terminals, go to next step. If resistance is 10 k/ohms or less at any terminal, repair short to ground in appropriate wire(s). Recheck system operation.
  8. Measure resistance of wires between DSM 22-pin harness connector C337 and memory switch harness connector. See MEMORY SWITCH CIRCUIT IDENTIFICATION  table. See Fig 1 and Fig 2 . If resistance is less than 5 ohms in all measurements, replace driver's seat module. See DRIVER'S SEAT MODULE  under REMOVAL & INSTALLATION. Recheck system operation. If resistance is 5 ohms or more in any measurement, repair open in appropriate wire(s). See WIRING DIAGRAMS  . Recheck system operation.
    MEMORY SWITCH CIRCUIT IDENTIFICATION

    Memory Set Switch Harness Connector Terminal No. Wire Color DSM Harness Connector Terminal No.
    1 Brown/Orange 3
    3 Black/Orange 15
    4 Brown/Light Green 16
    8 White/Orange 13
    Fig 2: Identifying Driver's Seat Module Harness Connector C337 & Remote Anti-Theft Personality Module Harness Connector C338 Terminals
    G96B31337Courtesy of FORD MOTOR CO.
  9. Place seat in center position using seat control switch. Using NGS tester, monitor PIDs SFWD_P, SFNT_P and SREAR_P while moving seat through all positions. PID values should increase during forward and upward movement, and decrease during rearward and downward movement. If PID values changed as specified, replace driver's seat module. See DRIVER'S SEAT MODULE  under REMOVAL & INSTALLATION. If PID values did not change as specified, go to appropriate step. See TEST STEP  table.
    TEST STEP

    Malfunction Go To
    Improper PID SFNT_P Value Next Step
    Improper PID SREAR_P Value Step  13
    Improper PID SFWD_P Value Step  16
  10. Turn ignition switch to LOCK position. Disconnect DSM Black 16-pin harness connector C351. Disconnect driver's seat motor assembly 8-pin harness connector C359. Turn ignition switch to RUN position. Measure voltage between ground and driver's seat motor assembly harness connector C359 terminals No. 1 (Orange/White wire), No. 2 (Light Green/Red wire) and No. 3 (Orange/Red wire). See Fig 3 . If voltage does not exist at any terminal, go to next step. If voltage exists at any terminal, repair short to voltage in appropriate wire. See WIRING DIAGRAMS  . Recheck system operation.
    Fig 3: Identifying Driver's Seat Motor Assembly Harness Connector C359 Terminals (With Memory Seat)
    G96D31347Courtesy of FORD MOTOR CO.
  11. Turn ignition switch to LOCK position. Measure resistance between ground and driver's seat motor assembly harness connector C359 terminals No. 1 (Orange/White wire), No. 2 (Light Green/Red wire) and No. 3 (Orange/Red wire). If resistance is more than 10 k/ohms at all terminals, go to next step. If resistance is 10 k/ohms or less at any terminal, repair short to ground in appropriate wire. See WIRING DIAGRAMS  . Recheck system operation.
  12. Measure resistance of wires between driver's seat motor assembly harness connector C359 and DSM 16-pin harness connector C351. See FRONT HEIGHT MOTOR POSITION SENSOR CIRCUIT IDENTIFICATION  table. See Figure and Fig 3 . If resistance is less than 5 ohms in all measurements, replace front seat track assembly. See POWER SEAT TRACK ASSEMBLY  under REMOVAL & INSTALLATION. Recheck system operation. If resistance is 5 ohms or more in any measurement, repair open or high resistance in appropriate wire. See WIRING DIAGRAMS  . Recheck system operation.
    FRONT HEIGHT MOTOR POSITION SENSOR CIRCUIT IDENTIFICATION

    Driver's Seat Motor Assembly Harness Connector Terminal No. Wire Color DSM Harness Connector Terminal No.
    1 Orange/White 1
    2 Light Green/Red 9
    3 Orange/Red 3
  13. Turn ignition switch to LOCK position. Disconnect DSM Black 16-pin harness connector C351. Disconnect memory seat position sensor 8-pin harness connector C359. Turn ignition switch to RUN position. Measure voltage between ground and driver's seat motor assembly harness connector C359 terminals No. 1 (Orange/White wire), No. 3 (Orange/Red wire) and No. 6 (Light Green/Black wire). See Fig 3 . If voltage does not exist at any terminal, go to next step. If voltage exists at any terminal, repair short to voltage in appropriate wire(s). See WIRING DIAGRAMS  . Recheck system operation.
  14. Turn ignition switch to LOCK position. Measure resistance between ground and driver's seat motor assembly harness connector C359 terminals No. 1 (Orange/White wire), No. 3 (Orange/Red wire) and No. 6 (Light Green/Black wire). If resistance is more than 10 k/ohms at all terminals, go to next step. If resistance is 10 k/ohms or less at any terminal, repair short to ground in appropriate wire(s). See WIRING DIAGRAMS  . Recheck system operation.
  15. Measure resistance of wires between driver's seat motor assembly harness connector C359 and DSM 16-pin harness connector C351. See REAR HEIGHT MOTOR POSITION SENSOR CIRCUIT IDENTIFICATION  table. See Figure and Fig 3 . If resistance is less than 5 ohms in all measurements, replace front seat track assembly. See POWER SEAT TRACK ASSEMBLY  under REMOVAL & INSTALLATION. Recheck system operation. If resistance is 5 ohms or more in any measurement, repair open or high resistance in appropriate wire(s). See WIRING DIAGRAMS  . Recheck system operation.
    REAR HEIGHT MOTOR POSITION SENSOR CIRCUIT IDENTIFICATION

    Driver's Seat Motor Assembly Harness Connector Terminal No. Wire Color DSM Harness Connector Terminal No.
    2 Light Green/Red 9
    3 Orange/Red 3
    6 Light Green/Black 8
  16. Turn ignition switch to LOCK position. Disconnect DSM Black 16-pin harness connector C351. Disconnect memory seat position sensor 8-pin harness connector C359. Turn ignition switch to RUN position. Measure voltage between ground and memory seat position sensor 8-pin connector C359 terminals No. 1 (Orange/White wire), No. 3 (Orange/Red wire) and No. 4 (Light Green/Orange wire). If voltage does not exist at all terminals, go to next step. If voltage exists at any terminal, repair short to voltage in appropriate wire(s). Recheck system operation.
  17. Turn ignition switch to LOCK position. Measure resistance between ground and driver's seat motor assembly harness connector C359 terminals No. 1 (Orange/White wire), No. 3 (Orange/Red wire) and No. 4 (Light Green/Orange wire). If resistance is more than 10 k/ohms at all terminals, go to next step. If resistance is 10 k/ohms or less at any terminal, repair short to ground in appropriate wire(s). See WIRING DIAGRAMS  . Recheck system operation.
  18. Measure resistance of wires between driver's seat motor assembly harness connector C359 and DSM 16-pin harness connector C351. See SEAT POSITION SENSOR CIRCUIT IDENTIFICATION  table. See Figure and Fig 3 . If resistance is less than 5 ohms in all measurements, replace front seat track assembly. See POWER SEAT TRACK ASSEMBLY  under REMOVAL & INSTALLATION. Recheck system operation. If resistance is 5 ohms or more in any measurement, repair open or high resistance in appropriate wire(s). Recheck system operation.
    HORIZONTAL MOTOR POSITION SENSOR CIRCUIT IDENTIFICATION

    Height Position Sensor Connector Terminal No. Wire Color DSM Harness Connector Terminal No.
    2 Light Green/Red 9
    3 Orange/Red 3
    1 Orange/White 1
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