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Test A: No Communication With Driver Door Module

NOTE: After any repairs are complete, ensure all components are properly installed, all harness connectors are connected properly and repeat data link diagnostic test.
NOTE: Connectors C315 and C362 are 2-terminal connectors. Identify connectors by wire color. See WIRING DIAGRAMS  .
  1. Check For PID Data Access  - Connect NGS tester to data link connector. Turn ignition switch to RUN position. Monitor Driver Door Module (DDM) PIDs SFWD_SW, SREAR_SW, SFNT_SW and SRCL_SW while activating power seat switch. If TEST/FUNCTION MODULE NOT RESPONDING: DDM is not displayed, go to next step. If TEST/FUNCTION MODULE NOT RESPONDING: DDM is displayed, go to MODULE COMMUNICATIONS NETWORK article to diagnose network concern.
  2. Check Fuse No. 39  - Ensure transmission is in Park. Turn ignition switch to LOCK position. Check fuse No. 39 (10-amp) in instrument panel fuse box. If fuse is okay, go to next step. If fuse is blown, go to step 6).
  3. Check Voltage To Fuse Box  - Measure voltage at input side of fuse No. 39. If battery voltage exists, go to next step. If battery voltage does not exist, go to step 22).
  4. Check Black/White Wire For Open  - Install fuse No. 39. Disconnect DDM harness connector C524. Measure voltage at terminal No. 6 (Black/White wire) at DDM harness connector C524. If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Black/White wire between instrument panel fuse box and DDM.
  5. Check Black/Light Blue Wire For Open  - Measure resistance between ground and terminal No. 14 (Black/Light Blue wire) at DDM harness connector C524. If resistance is greater than 5 ohms, repair open in Black/Light Blue wire. If resistance is 5 ohms or less, go to MODULE COMMUNICATIONS NETWORK article to diagnose network concern.
  6. Check System For Short  - Replace fuse No. 39. DO NOT  operate power seat switch. If fuse blows, go to next step. If fuse does not blow, go to step 12).
  7. Check For Short To Ground  - Remove fuse No. 39. Disconnect DDM harness connector C524, Driver Seat Module (DSM) harness connector C342, driver door lock switch harness connector C505, passenger door lock switch harness connector C602 and power mirror control switch harness connector C550. Measure resistance between ground and terminal No. 6 (Black/White wire) at DDM harness connector C524. If resistance is 10,000 ohms or greater, go to next step. If resistance is less than 10,000 ohms, repair short to ground in Black/White wire.
  8. Check DSM For Short  - Connect DSM harness connector C342. Measure resistance between ground and terminal No. 6 (Black/White wire) at DDM harness connector C524. If resistance is 10,000 ohms or greater, go to next step. If resistance is less than 10,000 ohms, replace driver seat module.
  9. Check DDM For Short  - Connect DDM harness connector C524. Measure resistance between ground and terminal No. 6 (Black/White wire) at driver door lock switch harness connector C505. If resistance is 10,000 ohms or greater, go to next step. If resistance is less than 10,000 ohms, replace driver door module.
  10. Check Passenger Door Lock Switch For Short  - Connect passenger door lock switch harness connector C602. Measure resistance between ground and terminal No. 6 (Black/White wire) at driver door lock switch harness connector C505. If resistance is 10,000 ohms or greater, go to next step. If resistance is less than 10,000 ohms, replace passenger door lock switch.
  11. Check Power Mirror Control Switch For Short  - Connect power mirror control switch harness connector C550. Measure resistance between ground and terminal No. 6 (Black/White wire) at driver door lock switch harness connector C505. If resistance is 10,000 ohms or greater, replace driver door lock switch. If resistance is less than 10,000 ohms, replace power mirror control switch.
  12. Activate Driver & Passenger Door Lock Switches  - Lock and unlock doors at all door lock switches. If fuse No. 39 blows, go to next step. If fuse No. 39 does not blow, go to step 15).
  13. Check Driver & Passenger Door Lock Switches  - 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.
  14. Check Pink/Yellow & Pink/Light Green Wires For Short To Ground  - Disconnect Driver Door Module (DDM) harness connector C523. Measure resistance between ground and terminal No. 1 (Pink/Yellow wire) at driver door lock switch harness connector C505. Also, measure resistance between ground and terminal No. 5 (Pink/Light Green wire) at driver door lock switch harness connector C505. If any resistance reading is less than 10,000 ohms, repair short to ground in appropriate wire(s). If both resistance readings are 10,000 ohms or greater, replace driver door module.
  15. Activate Keyless Entry Pad  - Press each number on keyless entry pad one at a time. If fuse No. 39 blows, go to next step. If fuse No. 39 does not blow, go to step 17).
  16. Check For Short To Ground  - Disconnect Driver Door Module (DDM) harness connector C523. Disconnect keyless entry keypad harness connector C525. Measure resistance between ground and appropriate terminals at remote keyless entry keypad harness connector C525. See REMOTE KEYLESS ENTRY TERMINAL IDENTIFICATION  table. If all resistance readings are 10,000 ohms or greater, replace driver door module. If any resistance readings are less than 10,000 ohms, repair short to ground in appropriate wire.
    REMOTE 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 Mirror Control Switch  - Activate mirrors in all directions. If fuse No. 39 blows, go to next step. If fuse No. 39 does not blow, go to step 20).
  18. Check Mirror Control Switch  - Remove mirror control switch. Test mirror control switch. See MIRROR CONTROL SWITCH  under COMPONENT TESTS. If mirror control switch is okay, go to next step. If mirror control switch is defective, replace mirror control switch.
  19. Check For Short To Ground  - Disconnect Driver Door Module (DDM) harness connector C506. Disconnect mirror control switch harness connector C550. Measure resistance between ground and appropriate terminals at mirror control switch harness connector C550. See MIRROR CONTROL SWITCH TERMINAL IDENTIFICATION  table. If all resistance readings are 10,000 ohms or greater, replace driver door module. If any resistance readings are less than 10,000 ohms, repair short to ground in appropriate wire.
    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 Power Seat Control Switch  - Activate driver seat control switch in all directions. If fuse No. 39 blows, go to next step. If fuse No. 39 does not blow, system is operating properly at this time.
  21. Check For Short To Ground  - Disconnect Driver Door Module (DDM) harness connector C506. Disconnect driver seat control switch harness connector C520. Measure resistance between ground and appropriate terminals at driver seat control switch harness connector C520. See DRIVER SEAT CONTROL SWITCH TERMINAL IDENTIFICATION  table. If all resistance readings are 10,000 ohms or greater, replace driver door module. If any resistance readings are less than 10,000 ohms, repair short to ground in appropriate wire.
    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. Check Power Distribution  - Turn ignition switch to LOCK position. Remove 30-amp driver door module fuse (No. 1) from power distribution box in engine compartment. See Fig 1 . If fuse is not blown, go to next step. If fuse is blown, go to step 24).
  23. Check Voltage Supply  - Measure voltage at input side of fuse No. 1 at power distribution box. If battery voltage exists, repair open in Red wire between power distribution box and instrument panel fuse box. If battery voltage does not exist, replace power distribution box.
  24. Check Red Wire For Short To Ground  - Ensure fuse No. 1 is still removed. Disconnect Driver Seat Module (DSM) harness connector C362. Disconnect driver heated seat module harness connector C352. Disconnect driver lumbar switch harness connector C348. Measure resistance between ground and terminal No. 1 (Red wire) at DSM harness connector C362. If resistance is 10,000 ohms or greater, go to next step. If resistance is less than 10,000 ohms, repair short to ground in Red wire.
  25. Check DSM For Short To Ground  - Connect DSM harness connector C362. Measure resistance between ground and output terminal of fuse No. 1 at power distribution box. If resistance is 10,000 ohms or greater, go to next step. If resistance is less than 10,000 ohms, replace driver seat module.
  26. Identify System Short  - Replace fuse No. 1 (30-amp) in power distribution box. Connect driver lumbar switch harness connector C348. Operate driver lumbar switch in both directions. If fuse No. 1 blows, go to next step. If fuse No. 1 does not blow, go to step 30).
  27. Check Power Lumbar Switch For Short To Ground  - Remove fuse No. 1 (30-amp) from power distribution box. Measure resistance between ground and output cavity of fuse No. 1 at power distribution box. If resistance is greater than 10,000 ohms, go to next step. If resistance is less than 10,000 ohms, replace driver lumbar switch.
  28. Check For Short To Ground  - Disconnect driver lumbar switch harness connector C348. Measure resistance between ground and terminal No. 4 (Pink wire) at driver lumbar switch harness connector C348. Also, measure resistance between ground and terminal No. 2 (Brown wire) at driver lumbar switch harness connector C348. If both resistance readings are 10,000 ohms or greater, go to next step. If either resistance reading is less than 10,000 ohms, replace driver lumbar switch.
  29. Check Lumbar Motor For Short To Ground  - Disconnect driver lumbar motor harness connector C315. Measure resistance between ground and terminal No. 4 (Pink wire) at driver lumbar switch harness connector C348. Also, measure resistance between ground and terminal No. 2 (Brown wire) at driver lumbar switch harness connector C348. If both resistance readings are 10,000 ohms or greater, replace power lumbar motor. If either resistance reading is less than 10,000 ohms, repair short to ground in appropriate wire.
  30. Check For Short To Ground  - Disconnect driver heated seat module harness connector C352. Measure resistance between ground and appropriate terminals at driver heated seat module harness connector C352. See HEATED SEAT MODULE CONNECTOR TERMINAL IDENTIFICATION  table. If all resistance readings are 10,000 ohms or greater, replace driver heated seat module. If any resistance readings are less than 10,000 ohms, repair short to ground in appropriate wire.
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: Driver Seat Module Fuse
G98A01561Courtesy of FORD MOTOR CO.
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