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Test J: Memory Seat Inoperative/Does Not Operate Correctly

  1. Turn ignition off. Disconnect memory set switch. Measure resistance between memory set switch pins No. 1 and 2 (component side) while pressing and releasing "1" button. See Fig 1 . Measure resistance between memory set switch pins No. 1 and 3 (component side) while pressing and releasing "2" button. Resistance should be less than 5 ohms with switch button pressed, and greater than 10 k/ohms with switch button released. If resistance is as specified in all measurements, go to next step. If resistance is not as specified in any measurement, replace memory set switch.
    Fig 1: Identifying Memory Set Switch Component Pins
    G99E02237Courtesy of FORD MOTOR CO.
  2. Disconnect Driver's Seat Module (DSM) connectors. Measure voltage between ground and memory set switch connector C521 terminal No. 2 (Green/Black wire). See Fig 2 . Measure voltage between ground and memory set switch connector C521 terminal No. 3 (Light Blue wire). If any voltage is present in either measurement, repair short to voltage in appropriate wire. If voltage is not present in any measurement, go to next step.
    Fig 2: Identifying Memory Set Switch Connector C521 Terminals
    G99G02238Courtesy of FORD MOTOR CO.
  3. Measure resistance of Green/Black wire between memory set switch connector C521 terminal No. 2 and DSM connector C2046A terminal No. 20. Resistance should be less than 5 ohms. Measure resistance between ground and memory set switch connector C521 terminal No. 2 (Green/Black wire). Resistance should be greater than 10 k/ohms. If resistance is as specified, go to next step. If resistance is not as specified, repair open or short to ground in Green/Black wire.
  4. Measure resistance of Light Blue wire between memory set switch connector C521 terminal No. 3 and DSM connector C2046A terminal No. 28. Resistance should be less than 5 ohms. Measure resistance between ground and memory set switch connector C521 terminal No. 3 (Light Blue wire). Resistance should be greater than 10 k/ohms. If resistance is as specified, go to next step. If resistance is not as specified, repair open or short to ground in Light Blue wire.
  5. Measure resistance between ground and memory set switch connector C521 terminal No. 1 (Black wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Black wire.
  6. Disconnect 3-pin seat track sliding (C380), lifting (C381) and reclining (C382) position sensor connectors. Measure voltage between ground and DSM connector C2046B position sensor circuits. See DSM POSITION SENSOR CIRCUITS  table. See Figure . If no voltage is present in all measurements, go to next step. If voltage is present in any measurement, repair short to voltage in appropriate position sensor circuit.
    DSM POSITION SENSOR CIRCUITS

    DSM Terminal No. Position Sensor Connector/Terminal No. Wire Color
    33 C380/2 Light Green/Orange
    41 C380/1, C381/1 & C382/1 Orange/White
    42 C381/2 Light Green/Black
    43 C382/2 Orange/Light Blue
    44 C380/3, C381/3 & C382/3 Orange/Red
  7. Measure resistance of circuits between DSM connector C2046B and appropriate seat track position sensor connectors. See DSM POSITION SENSOR CIRCUITS  table. If all resistance measurements are less than 5 ohms, go to next step. If any resistance measurement is 5 ohms or more, repair open in appropriate circuit.
  8. Measure resistance between ground and DSM connector C2046B position sensor circuits. See DSM POSITION SENSOR CIRCUITS  table. If all resistance measurements are greater than 10 k/ohms, go to next step. If any resistance measurement is 10 k/ohms or less, repair short to ground in appropriate position sensor circuit.
  9. Reconnect DSM connector. Measure voltage between seat track sliding position sensor connector terminal No. 1 (Orange/White wire) and No. 3 (Orange/Red wire). Move seat fully forward and fully reverse. If voltage is about 4 volts, go to next step. If voltage is not about 4 volts, replace DSM.
  10. Turn ignition off. Reconnect 3-pin seat track sliding (C380), lifting (C381) and reclining (C382) position sensor connectors. Disconnect DSM connector C2046B. Remove DSM connector 2046B terminal No. 33 (Light Green/Orange wire) from connector. Reconnect DSM connector. Turn ignition on. Measure voltage between ground and DSM connector 2046B terminal No. 33 (Light Green/Orange wire) that was removed from connector. Move seat fully forward and fully reverse. If voltage varies between zero and 2.5 volts, go to next step. If voltage does not vary between zero and 2.5 volts, replace seat track assembly.
  11. Turn ignition off. Disconnect DSM connector C2046B. Replace terminal No. 33 (Light Green/Orange wire) into DSM connector 2046B. Remove terminal No. 42 (Light Green/Black wire) from connector. Reconnect DSM connector. Turn ignition on. Measure voltage between ground and DSM connector 2046B terminal No. 42 (Light Green/Black wire) that was removed from connector. Move seat fully forward and fully reverse. If voltage varies between zero and 2.5 volts, go to next step. If voltage does not vary between zero and 2.5 volts, replace seat track assembly.
  12. Turn ignition off. Disconnect DSM connector C2046B. Replace terminal No. 42 (Light Green/Black wire) into DSM connector 2046B. Remove terminal No. 43 (Orange/Light Blue wire) from connector. Reconnect DSM connector. Turn ignition on. Measure voltage between ground and DSM connector 2046B terminal No. 43 (Orange/Light Blue wire) that was removed from connector. Move seat fully forward and fully reverse. If voltage varies between zero and 2.5 volts, replace DSM. If voltage does not vary between zero and 2.5 volts, replace seat track assembly.
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