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Test E: Memory Seat Does Not Move Horizontally/Vertically

WARNING: LS is equipped with driver's and passenger's side air bags. Before testing or repairing power seat system, disable air bag system. See AIR BAG RESTRAINT SYSTEMS - LS article. For any diagnostic or service to power seats equipped with side air bags, use Air Bag Simulators (418-133). Air bag simulators must be installed to air bag floor connector, and removed prior to operating vehicle.
NOTE: After any repairs are complete, ensure all component are properly installed and all harness connectors are connected properly and repeat data link diagnostic test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM in appropriate MODULE COMMUNICATIONS NETWORK - LS article.
  1. Turn ignition switch to OFF position. Using NGS tester, perform Driver's Seat Module (DSM) self-test. If any DSM DTCs are retrieved, go to appropriate step. See DSM DTC STEP INDEX  table. If no DSM DTCs are retrieved, go to step  45 .
    DSM DTC STEP INDEX

    DTC Go To
    B1703, B1707, B1711, B1715, B1719, B1723 Or B1731 Next Step
    B1757, B1767, B1765, B1769, B2146, B2149, B2152 Or B2155 Step  4
    B2146, B2149, B2152 Or B2155 Step  43
  2. Ensure ignition is in OFF position. Disconnect DSM connector C341C. Turn ignition switch to RUN position. Measure voltage between ground and appropriate terminals at DSM connector C341C. See DSM CONNECTOR C341C CIRCUIT IDENTIFICATION  table. See Figure . If any voltages are greater than 10 volts, go to next step. If any voltages are less than 10 volts, clear DTCs. Repeat DSM self-test. If DTC B1703, B1707, B1711, B1715, B1719, B1723, B1727, or B1731 are retrieved, replace DSM. See DRIVER'S SEAT MODULE  under REMOVAL & INSTALLATION. Calibrate driver's seat, see SEAT CALIBRATION  under DESCRIPTION & OPERATION. If any other DTCs are retrieved, perform appropriate test. See DRIVER'S SEAT MODULE DTC INDEX  table under SELF-DIAGNOSTIC SYSTEM.
    DSM CONNECTOR C341C CIRCUIT IDENTIFICATION

    DSM Terminal No. Wire Color
    3 Gray/Orange
    4 Gray/Red
    5 White/Black
    6 Gray/White
    11 White/Green
    12 White/Red
    13 Gray/Black
    14 White/Violet
  3. Disconnect driver's seat control switch connector C360. Measure voltage between ground and appropriate terminals at DSM connector C341c. See DSM CONNECTOR C341C CIRCUIT IDENTIFICATION  table. See Figure . If any voltages are greater than 10 volts, repair short to power in appropriate wire(s). See WIRING DIAGRAMS  . If all voltages are less than 10 volts, replace driver's seat control switch.
  4. Using NGS tester, perform DSM self-test. If DSM DTCs B1757, B1761, B1765 and B1769 are retrieved, go to next step. If DSM DTCs B1757, B1761, B1765 and B1769 are not retrieved, go to step  10 .
  5. Disconnect driver's horizontal position sensor connector C372. Measure resistance between ground and terminal No. 1 (Yellow/Red wire) at driver's horizontal position sensor connector C372. See Figure . If resistance is 180 ohms or less, go to step  7 . If resistance is greater than 180 ohms, go to next step.
  6. Ensure ignition switch is in OFF position. Disconnect DSM connector C341a. Measure resistance between terminal No. 3 (Brown/Red wire) at driver's horizontal position sensor connector and terminal No. 11 (Brown/White wire) at DSM connector C341a. See Figure and Figure . If resistance is 5 ohms or less, replace DSM. See DRIVER'S SEAT MODULE  under REMOVAL & INSTALLATION. Calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION. If resistance is greater than 5 ohms, repair open in Brown/Red or Brown/White wire between driver's seat module and driver's horizontal position sensor.
  7. Turn ignition switch to RUN position. Measure voltage between ground and terminal No. 1 (Yellow/Red wire) at driver's horizontal position sensor connector. If voltage is greater than 10 volts, go to step  10 . If voltage is less than 10 volts, go to next step.
  8. Turn ignition switch to OFF position. Disconnect DSM connector C341a. Measure resistance between ground and terminal No. 1 (Yellow/Red wire) at driver's horizontal position sensor connector C372. See Figure . If resistance is greater than 10 k/ohms, go to next step. If resistance is less than 10 k/ohms, repair short to ground in Yellow/Red wire.
  9. Measure resistance between terminal No. 1 (Yellow/Red wire) at driver's horizontal position sensor connector and terminal No. 15 (Yellow/Violet wire) at DSM connector C341a. See Figure and Figure . If resistance is 5 ohms or less, replace DSM. See DRIVER'S SEAT MODULE  under REMOVAL & INSTALLATION. Calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION. If resistance is greater than 5 ohms, repair open in Yellow/Red wire or Yellow/Violet wire between driver's seat module and driver's horizontal position sensor.
  10. Using NGS tester, perform DSM self-test. If DTC B1757 was retrieved, go to next step. If DTC B1761 was retrieved, go to step  19 . If DTC B1765 was retrieved, go to step  27 . If DTC B1769 was retrieved, go to step  35 . If no DTCs were retrieved, go to step  43 .
  11. Disconnect driver's seat rear height motor connector C382. Measure voltage between terminals No. 1 (Yellow/Violet wire) and No. 2 (White/Violet wire) at driver's seat rear height motor connector C382. Operate driver's seat control switch to rear up and down positions. See Figure . If voltage is greater than 10 volts in both directions, go to step  15 . If voltage is less than 10 volts in both direction, go to next step.
  12. Measure voltage at terminal No. 1 (Yellow/Violet wire) at driver's seat rear height motor connector C382, while operating driver's seat control switch to rear down position. Measure voltage at terminal No. 2 (White/Violet wire) at driver's seat rear height motor connector C382, while operating driver's seat control switch to rear up position. See Figure . If voltage is greater than 10 volts at both terminals, replace DSM. See DRIVER'S SEAT MODULE  under REMOVAL & INSTALLATION. Calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION. If voltage is less than 10 volts at either terminal, go to next step.
  13. Ensure ignition is in OFF position. Disconnect DSM connector C341a. Measure resistance between ground and terminal No. 1 (Yellow/Violet wire) at driver's seat rear height motor connector C382. See Figure . Measure resistance between ground and terminal No. 2 (White/Violet wire) at driver's seat rear motor connector C382. If both resistances are greater than 10 k/ohms, go to next step. If either resistance is less than 10 k/ohms, repair short to ground in Yellow/Violet wire or White/Violet wire.
  14. Measure resistance of Yellow/Violet wire between terminal No. 1 at driver's seat rear height motor connector C382 and terminal No. 8 at DSM connector C341a. Measure resistance of White/Violet wire between terminal No. 2 at driver's seat rear height motor connector C382 and terminal No. 16 at DSM connector C341a. See Figure and Figure . If both resistances are 5 ohms or less, replace DSM. See DRIVER'S SEAT MODULE  under REMOVAL & INSTALLATION. Calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION. If either resistance is greater than 5 ohms, repair open in Yellow/Violet wire or White/Violet wire.
  15. Turn ignition switch to OFF position. Disconnect rear height motor position sensor connector C383. Measure resistance between ground and terminal No. 3 (Brown/Green wire) at rear height motor position sensor connector C383. See Figure . If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Brown/Green wire.
  16. Measure voltage at terminal No. 1 (Yellow/Green wire) at rear height motor position sensor connector C383. If voltage is approximately 5 volts, go to next step. If voltage is not approximately 5 volts, repair open in Yellow/Green wire.
  17. Disconnect DSM connector C341a. Measure resistance between ground and terminal No. 2 (White/Green wire) at rear height motor position sensor connector C383. See Figure . If resistance is greater than 10 k/ohms, go to next step. If resistance is less than 10 k/ohms, repair short to ground in White/Green wire.
  18. Measure resistance of White/Green wire between terminal No. 2 at rear height motor position sensor connector C383 and terminal No. 14 at DSM connector C341A. See Figure and Figure . If resistance is 5 ohms or less, replace front seat track. See FRONT SEAT TRACK  under REMOVAL & INSTALLATION. If resistance is greater than 5 ohms, repair open in White/Green wire.
  19. Ensure ignition is off. Disconnect driver's seat front height motor connector C363. Measure voltage between terminals No. 1 (Yellow/Black wire) and No. 2 (White/Black wire) at driver's seat front height motor connector C363. See Figure . Operate driver's seat control switch to UP and DOWN positions. If voltage is greater than 10 volts in both directions, go to step  23 . If voltage is less than 10 volts in both directions, go to next step.
  20. Measure voltage at terminal No.1 (Yellow/Black wire) at driver's seat front height motor connector C363, while operating driver's seat control switch to DOWN position. Measure voltage at terminal No. 2 (White/Black wire) at driver's seat front height motor connector C363, while operating driver's seat control switch to UP position. See Figure . If voltage is greater than 10 volts at both terminals, replace DSM. Calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION. If voltage is less than 10 volts at either terminal, go to next step.
  21. Disconnect DSM connector C341a. Measure resistance between ground and terminal No. 1 (Yellow/Black wire) at driver's seat front height motor connector C363. Measure resistance between ground and terminal No. 2 (White/Black wire) at driver's seat front height motor connector C363. See Figure . If both resistances are greater than 10 k/ohms, go to next step. If either resistance is less than 10 k/ohms, repair short to ground in Yellow/Black wire or White/Black wire.
  22. Measure resistance of Yellow/Black wire between terminal No. 1 at driver's seat front height motor connector C363 and terminal No. 7 at DSM connector C341a. Measure resistance of White/Black wire between terminal No. 2 at driver's seat front height motor connector C363 and terminal No. 17 at DSM connector C341a. See Figure and Figure . If both resistances are 5 ohms or less, replace DSM. See DRIVER'S SEAT MODULE  under REMOVAL & INSTALLATION. Calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION. If either resistance is greater than 5 ohms, repair open in Yellow/Black wire or White/Black wire.
  23. Ensure ignition is off. Disconnect front height motor position sensor C373. Measure resistance between ground and terminal No. 3 (Brown/Yellow wire) at front height motor position sensor connector C373. See Figure . If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Brown/Yellow wire.
  24. Measure voltage at terminal No. 1 (Yellow/Black wire) at front height motor position sensor connector C373. If voltage is approximately 5 volts, go to next step. If voltage is not approximately 5 volts, repair open in Yellow/Black wire.
  25. Disconnect DSM connector C341a. Measure resistance between ground and terminal No. 2 (White/Black wire) at front height motor position sensor connector C373. See Figure . If resistance is greater than 10 k/ohms, go to next step. If resistance is less than 10 k/ohms, repair short to ground in White/Black wire.
  26. Measure resistance of White/Black wire between terminal No. 2 at front height motor position sensor connector C373 and terminal No. 5 at DSM connector C341a. See Figure and Figure . If resistance is 5 ohms or less, replace front seat track. See FRONT SEAT TRACK  under REMOVAL & INSTALLATION. Calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION. If resistance is greater than 5 ohms, repair open in White/Black wire.
  27. Disconnect forward/rearward motor connector C362. Measure voltage between terminals No. 1 (White/Green wire) and No. 2 (Yellow/Green wire) at forward/rearward motor connector C362. See Figure . Operate driver's seat control switch to forward and rearward positions. If voltage is greater than 10 volts in both directions, go to step  31 . If voltage is less than 10 volts in both directions, go to next step.
  28. Measure voltage at terminal No. 1 (White/Green wire) at forward/rearward motor connector C362, while operating driver's seat control switch to rearward position. Measure voltage at terminal No. 2 (Yellow/Green wire) at forward/rearward motor connector C362, while operating driver's seat control switch to forward position. If voltage is greater than 10 volts at both terminals, replace DSM. Calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION. If voltage is less than 10 volts at either terminal, go to next step.
  29. Disconnect DSM connector C341a. Measure resistance between ground and terminal No. 1 (White/Green wire) at forward/rearward motor connector C362. Measure resistance between ground and terminal No. 2 (Yellow/Green wire) at forward/rearward motor connector C362. If both resistances are greater than 10 k/ohms, go to next step. If either resistance is less than 10 k/ohms, repair short to ground in White/Green wire or Yellow/Green wire.
  30. Measure resistance of White/Green wire between terminal No. 1 at forward/rearward motor connector C362 and terminal No. 10 at DSM connector C341a. See Figure and Figure . Measure resistance of Yellow/Green wire between terminal No. 2 at forward/rearward motor connector C362 and terminal No. 1 at DSM connector C341a. If both resistances are 5 ohms or less, replace DSM. See DRIVER'S SEAT MODULE  under REMOVAL & INSTALLATION. Calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION. If either resistance is greater than 5 ohms, repair open in White/Green wire or Yellow Green wire.
  31. Disconnect forward/rearward motor position sensor connector C372. Measure resistance between ground and terminal No. 3 (Brown/Red wire) at forward/rearward motor position sensor connector C372. If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Brown/Red wire.
  32. Measure voltage at terminal No. 1 (Yellow/Red wire) at forward/rearward motor position sensor connector C372. If voltage is approximately 5 volts, go to next step. If voltage is not approximately 5 volts, repair open in Yellow/Red wire.
  33. Disconnect DSM connector C341a. Measure resistance between ground and terminal No. 2 (White/Red wire) at forward/rearward motor position sensor connector C372. If resistance is greater than 10 k/ohms, go to next step. If resistance is less than 10 k/ohms, repair short to ground in White/Red wire.
  34. Measure resistance of White/Red wire between terminal No. 2 at forward/rearward motor position sensor connector C372 and terminal No. 4 at DSM connector C341a. See Figure and Figure . If resistance is 5 ohms or less, replace front seat track. See FRONT SEAT TRACK  under REMOVAL & INSTALLATION. Calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION. If resistance is greater than 5 ohms, repair open in White/Red wire.
  35. Disconnect driver's seat backrest motor connector C368. See Figure . Measure voltage between terminals No. 1 (White/Red wire) and No. 2 (Yellow/Red wire) at driver's seat backrest motor connector C368, while operating driver's seat control switch recline forward and rearward. If voltage is greater than 10 volts in both directions, go to step  39 . If voltage is less than 10 volts in both directions, go to next step.
  36. Measure voltage at terminal No. 1 (White/Red wire) at driver's seat backrest motor connector C368, while operating driver's seat control switch recline rearward. Measure voltage at terminal No. 2 (Yellow/Red wire) at driver's seat backrest motor connector C368, while operating driver's seat control switch recline forward position. If voltage is greater than 10 volts at both terminals, replace DSM. See DRIVER'S SEAT MODULE  under REMOVAL & INSTALLATION. Calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION. If voltage is less than 10 volts at either terminal, go to next step.
  37. Disconnect DSM connector C341a. Measure resistance between ground and terminal No. 1 (White/Red wire) terminal at driver's seat backrest motor connector C368. Measure resistance between ground and terminal No. 2 (Yellow/Red wire) at driver's seat backrest motor connector C368. If both resistances are greater than 10 k/ohms, go to next step. If either resistance is less than 10 k/ohms, repair short to ground in Yellow/Red wire or White/Red wire.
  38. Measure resistance of White/Red wire between terminal No. 1 at driver's seat backrest motor connector C368 and terminal No. 9 at DSM connector C341a. Measure resistance of Yellow/Red wire between terminal No. 2 at driver's seat backrest motor connector C368 and terminal No. 2 at DSM connector C341a. See Figure and Figure . If both resistances are 5 ohms or less, replace DSM. See DRIVER'S SEAT MODULE  under REMOVAL & INSTALLATION. Calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION. If either resistance is greater than 5 ohms, repair open in Yellow/Red wire or White/Red wire.
  39. Disconnect backrest motor position sensor connector C376. Measure resistance between ground and terminal No. 1 (Brown/Blue wire) at backrest motor position sensor connector C376. If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Brown/Blue wire.
  40. Measure voltage at terminal No. 3 (Yellow/Blue wire) at backrest motor position sensor connector C376. If voltage is approximately 5 volts, go to next step. If voltage is not approximately 5 volts, repair open in Yellow/Blue wire.
  41. Disconnect DSM connector C341a. Measure resistance between ground and terminal No. 2 (White/Blue wire) at backrest motor position sensor connector C376. If resistance is greater than 10 k/ohms, go to next step. If resistance is less than 10 k/ohms, repair short to ground in White/Blue wire.
  42. Measure resistance of White/Blue wire between terminal No. 2 at backrest motor position sensor connector C376 and terminal No. 13 at DSM connector C341a. See Figure and Figure . If resistance is 5 ohms or less, replace front seat track. See FRONT SEAT TRACK  under REMOVAL & INSTALLATION. Calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION. If resistance is greater than 5 ohms, repair open in White/Blue wire.
  43. Using NGS tester, clear DSM DTCs. Operate driver's seat control switch through all positions, while monitoring DSM PIDs SFNT_MT, SREARMT, SFWD_MT and SRCL_MT. Watch seat movement. If driver's seat stops or hesitates, or if DSM PIDs are inconsistent, replace front seat track. See FRONT SEAT TRACK  under REMOVAL & INSTALLATION. Calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION. If driver's seat does not stop or hesitate, or if DSM PIDs are consistent, go to next step.
  44. Using NGS tester, clear DTCs. Perform DSM self-test. Operate driver's seat and wiggle harness and connectors. Inspect for any visual damage. If DTC B2146, B2149, B2152, or B2155 is retrieved, replace front seat track. See FRONT SEAT TRACK  under REMOVAL & INSTALLATION. Calibrate driver's seat. If no DTCs were retrieved, calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION.
  45. Using NGS tester, operate driver's seat control switch through all positions, while monitoring DSM PIDs SFNT_SW, SFWE_SW, SREAR_SW and SRCL_SW. If DSM PIDs agree with driver's seat control switch positions, replace DSM. See DRIVER'S SEAT MODULE  under REMOVAL & INSTALLATION. Calibrate driver's seat. See SEAT CALIBRATION  under DESCRIPTION & OPERATION. If DSM PIDs do not agree with driver's seat control switch positions, go to next step.
  46. Disconnect DSM connector C341c. Measure resistance between ground and appropriate terminals. See DSM CONNECTOR C341c CIRCUIT IDENTIFICATION  table. See Figure . If all resistances are 5 ohms or less, go to next step. If any resistance are greater than 5 ohms, repair open in appropriate wire. See WIRING DIAGRAMS  .
  47. Disconnect driver's seat control switch connector C360. Measure resistance between ground and appropriate terminals. See DSM CONNECTOR C341c CIRCUIT IDENTIFICATION  table. See Figure . If all resistances are greater than 10 k/ohms, replace driver's seat control switch. If any resistance is less than 10 k/ohms, repair short to ground in appropriate wire(s). See WIRING DIAGRAMS  .
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