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Test A: No Communication With Driver Door Module

  1. Turn ignition switch to RUN position. Using New Generation Star (NGS) tester, monitor DDM PIDs SFWD_SW, SREAR_SW, SFNT_SW and SRCL_SW while activating power seat switch. If NGS tester indicates UNABLE TO PERFORM TEST FUNCTION, DDM NOT RESPONDING, CHECK IGNITION STATUS/VERIFY CABLE REQUIREMENTS, OR CHECK CABLE CONNECTIONS, go to next step. If NGS tester does not indicate UNABLE TO PERFORM TEST FUNCTION, DDM NOT RESPONDING, CHECK IGNITION STATUS/VERIFY CABLE REQUIREMENTS, OR CHECK CABLE CONNECTIONS, go to TEST B: NO COMMUNICATION WITH LCM  .
  2. Ensure transmission is in Park. Turn ignition off. Check fuse No. 39 (10-amp) in fuse junction panel. If fuse is okay, go to next step. If fuse is not okay, go to step  6 .
  3. Using a voltmeter, check voltage between ground and input side (left terminal) of fuse No. 39. If more than 10 volts exists, go to next step. If more than 10 volts does not exist, go to step  22 .
  4. Install fuse No. 39. Disconnect DDM 14-pin connector C524 located in lower front corner of driver door. Using a voltmeter, check voltage between ground and DDM connector C524 terminal No. 6 (Black/White wire). See Fig 1 . If more than 10 volts exists, go to next step. If more than 10 volts does not exist, repair Black/White wire between fuse junction panel and DDM. Retest system operation.
  5. Using an ohmmeter, check resistance between ground and DDM connector C524 terminal No. 14 (Black/Light Blue wire). If resistance 5 ohms or more, repair Black/Light Blue wire and retest system operation. If resistance is less than 5 ohms, go to appropriate MODULE COMMUNICATIONS NETWORK article to diagnose network concern.
  6. Replace fuse No. 39. DO NOT operate any switches. If fuse blows, go to next step. If fuse No. 39 is okay, go to step  12 .
  7. Remove fuse No. 39 from fuse junction panel. Disconnect DDM 14-pin connector C524, Driver Seat Module (DSM) 26-pin connector C342 located under driver seat, driver door lock switch 8-pin connector, passenger door lock switch 8-pin connector C602 and outside rear view mirror control switch 8-pin connector C550. Using an ohmmeter, check resistance between ground and DDM connector C524 terminal No. 6 (Black/White wire). If resistance is more than 10 k/ohms, go to next step. If resistance is 10 k/ohms or less, repair short to ground in Black/White wire and retest system operation.
  8. Connect DSM connector C342. Using an ohmmeter, check resistance between ground and DDM connector C524 terminal No. 6 (Black/White wire). If resistance is more than 10 k/ohms, go to next step. If resistance is 10 k/ohms or less, replace DSM and retest system operation.
  9. Connect DDM connector C524. Using an ohmmeter, check resistance between ground and driver door lock switch connector terminal No. 6 (Black/White wire). If resistance is more than 10 k/ohms, go to next step. If resistance is 10 k/ohms or less, replace DDM and retest system operation.
  10. Connect passenger door lock switch 8-pin connector C602. Using an ohmmeter, check resistance between ground and driver door lock switch connector terminal No. 6 (Black/White wire). If resistance is more than 10 k/ohms, go to next step. If resistance is 10 k/ohms or less, replace passenger door lock switch and retest system operation.
  11. Connect outside rear view mirror control switch 8-pin connector. Using an ohmmeter, check resistance between ground and driver door lock switch connector C505 terminal No. 6 (Black/White wire). If resistance is more than 10 k/ohms, replace driver door lock switch and retest system operation. If resistance is 10 k/ohms or less, replace outside rear view mirror control switch and retest system operation.
  12. Lock and unlock doors using all door lock switches. If fuse No. 39 opens, go to next step. If fuse No. 39 is okay, go to step  15 .
  13. Remove driver and passenger door lock switches. Test both door lock switches. See DOOR LOCK SWITCH  under COMPONENT TESTS. If both door lock switches are okay, go to next step. If either door lock switch is defective, replace appropriate door lock switch and retest system operation.
  14. Disconnect DDM 20-pin connector C523 located in lower front corner of driver door. Using an ohmmeter, check resistance between ground and driver door lock switch connector terminal No. 1 (Pink/Yellow wire). Also, check resistance between ground and driver door lock switch connector terminal No. 5 (Pink/Light Green wire). If either or both resistance readings are 10 k/ohms or less, repair short to ground in appropriate wire(s). If both resistance readings are more than 10 k/ohms, replace DDM and retest system operation.
  15. Press each number on keyless entry pad one at a time. If fuse No. 39 opens, go to next step. If fuse No. 39 does not open, go to step  17 .
  16. Disconnect DDM 20-pin connector C523 and 14-pin connector C524 located in lower front corner of driver door. Disconnect keyless entry keypad connector C525. Using an ohmmeter, check resistance between ground and appropriate terminals at remote keyless entry keypad connector C525. See KEYLESS ENTRY TERMINAL IDENTIFICATION  table. If all resistance readings are more than 10 k/ohms, replace driver door module and retest system operation. If any resistance readings are 10 k/ohms or less, repair short to ground in appropriate wire and retest system operation.
    KEYLESS ENTRY TERMINAL IDENTIFICATION

    Terminal No. Wire Color
    1 Red
    2 Yellow
    3 Yellow/Black
    4 Light Green/Red
    5 Light Blue/Yellow
    9 Light Blue
  17. Activate mirrors in all directions. If fuse No. 39 opens, go to next step. If fuse No. 39 does not open go to step  20 .
  18. Remove outside rear view mirror control switch. Check outside rear view mirror control switch. See appropriate POWER MIRRORS article. If outside rear view mirror control switch is okay, go to next step. If outside rear view mirror control switch is defective, replace outside rear view mirror control switch and retest system operation.
  19. Disconnect DDM 16-pin connector C506 located in lower front corner of driver door. Disconnect outside rear view mirror control switch connector. Using an ohmmeter, check resistance between ground and appropriate terminals at outside rear view mirror control switch connector. See MIRROR CONTROL SWITCH TERMINAL IDENTIFICATION  table. If all resistance readings are more than 10 k/ohms, replace DDM and retest system operation. If any resistance reading are 10 k/ohms or less, repair short to ground in appropriate wire(s) and retest system operation.
    MIRROR CONTROL SWITCH TERMINAL IDENTIFICATION

    Terminal No. Wire Color
    3 Dark Blue/Orange
    4 Red/Orange
    6 Yellow/Black
    7 Purple/Orange
    8 Dark Green/Orange
  20. Activate driver seat control switch in all directions. If fuse No. 39 opens, go to next step. If fuse No. 39 does not open, system is operating properly at this time. Retest system operation.
  21. Disconnect DDM 16-pin connector C506 located in lower front corner of driver door. Disconnect driver seat control switch connector C520. Using an ohmmeter, check resistance between ground and appropriate terminals at driver seat control switch connector C520. See DRIVER SEAT CONTROL SWITCH TERMINAL IDENTIFICATION  table. If all resistance readings are more than 10 k/ohms, replace DDM and retest system operation. If any resistance readings are 10 k/ohms or less, repair short to ground in appropriate wire(s) and retest system operation.
    DRIVER SEAT CONTROL SWITCH TERMINAL IDENTIFICATION

    Terminal No. Wire Color
    2 Red/White
    3 Red/Light Green
    4 Red/Light Blue
    5 Gray
    7 Yellow/White
    8 Yellow/Light Green
    9 Yellow/Light Blue
    10 Gray/Black
  22. Turn ignition off. Remove maxi-fuse No. 1 (30-amp) from battery junction box. If fuse is okay, go to next step. If fuse is open go to step  24 .
  23. Using a voltmeter, check voltage between ground and input side of maxi-fuse No. 1 in battery junction box. If more than 10 volts exists, repair open in Red wire between power distribution box and fuse junction panel. If less than 10 volts exists, replace power distribution box and retest system operation.
  24. Ensure maxi-fuse No. 1 is still removed. Disconnect Driver Seat Module (DSM) 2-pin connector C362. Disconnect driver heated seat module 14-pin connector C352. Disconnect driver lumbar switch 5-pin connector C348. Using an ohmmeter, check resistance between ground and DSM 2-pin connector C362 terminal No. 1 (Red wire). If resistance is more than 10 k/ohms, go to next step. If resistance is 10 k/ohms or less, repair short to ground in Red wire and retest system operation.
  25. Connect DSM 2-pin connector C362. Using an ohmmeter, check resistance between ground and output terminal of maxi-fuse No. 1 in battery junction box. If resistance is more than 10 k/ohms, go to next step. If resistance is 10 k/ohms or less, replace driver seat module and retest system operation.
  26. Replace maxi-fuse No. 1 in battery junction box. Connect driver lumbar switch 5-pin connector C348. Operate driver lumbar switch in both directions. If maxi-fuse No. 1 opens, go to next step. If maxi-fuse No. 1 does not open, go to step  30 .
  27. Remove maxi-fuse No. 1 from battery junction box. Using an ohmmeter, check resistance between ground and output cavity of maxi-fuse No. 1 in battery junction box. If resistance is more than 10 k/ohms, go to next step. If resistance is 10 k/ohms or less, replace driver lumbar switch and retest system operation.
  28. Disconnect driver lumbar switch 5-pin connector C348. Using an ohmmeter, check resistance between ground and driver lumbar switch connector C348 terminal No. 4 (Pink wire). Also, check resistance between ground and driver lumbar switch connector C348 terminal No. 2 (Brown wire). If both resistance readings are more than 10 k/ohms, go to next step. If either reading is 10 k/ohms or less, replace driver lumbar switch and retest system operation.
  29. Disconnect driver lumbar motor 4-pin connector C315. Using an ohmmeter, check resistance between ground and driver lumbar switch connector C348 terminal No. 4 (Pink wire). Also, check resistance between ground and driver lumbar switch connector C348 terminal No. 2 (Brown wire). If both resistance readings are more than 10 k/ohms, replace power lumbar motor and retest system operation. If either reading is 10 k/ohms or less, repair short to ground in appropriate wire(s) and retest system operation.
  30. Disconnect driver heated seat module 14-pin connector C352. Using an ohmmeter, check resistance between ground and appropriate terminals at driver heated seat module 14-pin connector C352. See HEATED SEAT MODULE CONNECTOR TERMINAL IDENTIFICATION  table. If all resistance readings are more than 10 k/ohms, replace driver heated seat module and retest system operation. If any resistance readings are 10 k/ohms or less, repair short to ground in appropriate wire(s) and retest system operation.
HEATED SEAT MODULE CONNECTOR TERMINAL IDENTIFICATION

Terminal No. Wire Color
5 Black/Light Blue
6 Brown/Light Blue
8 Yellow/Light Blue
9 Gray/Light Blue
10 Red/Light Blue
11 Orange/Light Blue
12 Purple/Light Blue
13 White/Light Blue
Fig 1: Identifying DDM Connector C524 Terminals
G97E28534Courtesy of FORD MOTOR CO.
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